Alcoa of Australia Limited

Australia

Back to Profile

1-54 of 54 for Alcoa of Australia Limited Sort by
Query
Aggregations
IP Type
        Patent 50
        Trademark 4
Jurisdiction
        World 39
        United States 7
        Canada 7
        Europe 1
Date
New (last 4 weeks) 2
2024 February 1
2024 January 1
2023 November 1
2024 (YTD) 3
See more
IPC Class
C01F 7/06 - Preparation of alkali metal aluminates; Aluminium oxide or hydroxide therefrom by treating aluminous minerals or waste-like raw materials with alkali hydroxide, e.g. leaching of bauxite according to the Bayer process 10
C01F 7/46 - Purification of aluminium oxide, aluminium hydroxide or aluminates 7
C01F 7/47 - Purification of aluminium oxide, aluminium hydroxide or aluminates of aluminates, e.g. removal of compounds of Si, Fe, Ga or of organic compounds from Bayer process liquors 7
C01F 7/02 - Aluminium oxide; Aluminium hydroxide; Aluminates 6
C01F 7/04 - Preparation of alkali metal aluminates; Aluminium oxide or hydroxide therefrom 5
See more
NICE Class
01 - Chemical and biological materials for industrial, scientific and agricultural use 4
06 - Common metals and ores; objects made of metal 4
40 - Treatment of materials; recycling, air and water treatment, 4
Status
Pending 12
Registered / In Force 42

1.

PROCESS FOR PREPARING ALUMINA

      
Application Number AU2023050819
Publication Number 2024/040302
Status In Force
Filing Date 2023-08-25
Publication Date 2024-02-29
Owner ALCOA OF AUSTRALIA LIMITED (Australia)
Inventor
  • Lamacchia, Robert
  • Dye, Shannon
  • Konlechner, David

Abstract

A process for preparing high purity alumina from aluminium chloride hexahydrate solids. The process comprises digesting aluminium chloride hexahydrate solids having one or more inorganic impurities in hydrochloric acid to produce an aluminium chloride liquor, precipitating aluminium chloride hexahydrate solids from the liquor in one or more crystallisation stage(s) such that at least some of the inorganic impurities remains in the liquor, separating the precipitated aluminium chloride hexahydrate solids from the liquor to produce a hydrochloric acid process stream comprising the inorganic impurities, processing the separated aluminium chloride hexahydrate solids to form high purity alumina, optionally lowering the concentration of hydrogen chloride in the hydrochloric acid process stream, and removing at least some of the inorganic impurities from the hydrochloric acid process stream to produce a hydrochloric acid recycle stream which is recycled for use as the hydrochloric acid in the digestion step.

IPC Classes  ?

  • C01F 7/306 - Thermal decomposition of hydrated chlorides, e.g. of aluminium trichloride hexahydrate
  • C01F 7/56 - Chlorides
  • C01F 7/62 - Purification
  • C22B 3/10 - Hydrochloric acid
  • C22B 3/44 - Treatment or purification of solutions, e.g. obtained by leaching by chemical processes
  • C22B 21/00 - Obtaining aluminium

2.

METHOD OF PREPARING ALUMINA

      
Application Number 18242376
Status Pending
Filing Date 2023-09-05
First Publication Date 2024-02-22
Owner Alcoa of Australia Limited (Australia)
Inventor Lamacchia, Robert Joseph

Abstract

A process for preparing high purity alumina from aluminium-bearing materials is provided. The process digesting an aluminium bearing material to provide an aluminium chloride liquor, a first crystallisation vessel for crystallising aluminium chloride hexahydrate solids from the aluminium chloride liquor, optionally one or more subsequent crystallisation vessels for dissolving and recrystallising the aluminium chloride hexahydrate solids, and thermal treatment means for thermally treating the aluminium chloride hexahydrate solids to provide high purity alumina.

IPC Classes  ?

  • C01F 7/306 - Thermal decomposition of hydrated chlorides, e.g. of aluminium trichloride hexahydrate
  • B01D 9/00 - Crystallisation
  • C01F 7/62 - Purification

3.

Alcoa REFINERY OF THE FUTURE REINVENTING ALUMINA

      
Application Number 018972531
Status Pending
Filing Date 2024-01-10
Owner Alcoa of Australia Limited (Australia)
NICE Classes  ?
  • 01 - Chemical and biological materials for industrial, scientific and agricultural use
  • 06 - Common metals and ores; objects made of metal
  • 40 - Treatment of materials; recycling, air and water treatment,

Goods & Services

Alumina; Alumina fibre; Alumina trihydrate; Alumina (Aluminium oxide); Aluminium acetate; Aluminium alum; Aluminium chloride; Aluminium compounds; Aluminium halides; Aluminium hydrate; Aluminium silicate; Aluminium salts; Aluminium iodide; Bauxite; Activators to increase rate of chemical reaction; Chemical additives; Chemical additives for use in manufacture; Chemical additives for use in the casting of metals; Chemical additives for use in the moulding of metals; Chemical preparations for aiding water quality; Chemical preparations for forming coatings on metals; Chemical preparations for soil treatment; Chemical preparations for the binding of liquid waste; Chemical preparations for use in foundries; Chemical preparations for use in the manufacture of surface coatings; Chemical preparations for use in water treatment; Chemical products for use in foundry casting and tempering; Chemical products for use in metal processing; Chemical products for use in manufacturing; Chemical products for use in the extraction of minerals; Extraction chemicals; Chemical additives for use in industry; Chemical preparations for use in the metallurgical industry; Chemicals used in industry; Industrial chemicals; Chemical products for use in industry. Aluminium; Aluminium alloys; Aluminium discs; Aluminium doors; Aluminium foil; Aluminium foil paper laminates; Aluminium foils being packaging materials; Aluminium foils being wrapping materials; Aluminium framed modular platforms for use in theatres; Aluminium frames; Aluminium ladder rungs; Aluminium moulds; Aluminium profiles; Aluminium sheets; Aluminium slabs; Aluminium strips; Aluminium windows; Aluminium wire; Bauxite reinforced aluminium; Bauxite reinforced aluminium alloys; Building panels of aluminium; Ceramic reinforced aluminium; Ceramic reinforced aluminium alloys; Coated aluminium; Containers made of aluminium alloys (other than for household use); Extruded aluminium alloys; Extruded aluminium profiles; Extruded aluminium sections; Extrusions of aluminium; Roof flashings of aluminium; Prefabricated aluminium scaffolding frames. Metallurgical processing; Processing of minerals including bauxite; Processing of waste materials; Carbon offsetting services (recycling); Recycling; Recycling of metals; Recycling plants services; Chemical recycling of waste products; Refining; Refining services; Treatment of industrial waste; Metallurgical smelting; Alumina refining; Processing bauxite.

4.

REFINERY OF THE FUTURE

      
Application Number 1758857
Status Registered
Filing Date 2023-10-02
Registration Date 2023-10-02
Owner Alcoa of Australia Limited (Australia)
NICE Classes  ?
  • 01 - Chemical and biological materials for industrial, scientific and agricultural use
  • 06 - Common metals and ores; objects made of metal
  • 40 - Treatment of materials; recycling, air and water treatment,

Goods & Services

Alumina; alumina fibre; alumina trihydrate; alumina (aluminium oxide); aluminium acetate; aluminium alum; aluminium chloride; aluminium compounds; aluminium halides; aluminium hydrate; aluminium silicate; aluminium salts; aluminium iodide; bauxite; activators to increase rate of chemical reaction; chemical additives; chemical additives for use in manufacture; chemical additives for use in the casting of metals; chemical additives for use in the moulding of metals; chemical preparations for aiding water quality; chemical preparations for forming coatings on metals; chemical preparations for soil treatment; chemical preparations for the binding of liquid waste; chemical preparations for use in foundries; chemical preparations for use in the manufacture of surface coatings; chemical preparations for use in water treatment; chemical products for use in foundry casting and tempering; chemical products for use in metal processing; chemical products for use in manufacturing; chemical products for use in the extraction of minerals; extraction chemicals; chemical additives for use in industry; chemical preparations for use in the metallurgical industry; chemicals used in industry; industrial chemicals; chemical products for use in industry. Aluminium; aluminium alloys; aluminium discs; aluminium doors; aluminium foil; aluminium foil paper laminates; aluminium foils being packaging materials; aluminium foils being wrapping materials; aluminium framed modular platforms for use in theatres; aluminium frames; aluminium ladder rungs; aluminium moulds; aluminium profiles; aluminium sheets; aluminium slabs; aluminium strips; aluminium windows; aluminium wire; bauxite reinforced aluminium; bauxite reinforced aluminium alloys; building panels of aluminium; ceramic reinforced aluminium; ceramic reinforced aluminium alloys; coated aluminium; containers made of aluminium alloys (other than for household use); extruded aluminium alloys; extruded aluminium profiles; extruded aluminium sections; extrusions of aluminium; roof flashings of aluminium; prefabricated aluminium scaffolding frames. Metallurgical processing; processing of materials; processing of waste materials; carbon offsetting services (recycling); recycling; recycling of metals; recycling plants; chemical recycling of waste products; refining; refining services; treatment of industrial waste; metallurgical smelting.

5.

REFINERY OF THE FUTURE

      
Serial Number 79382200
Status Pending
Filing Date 2023-10-02
Owner Alcoa of Australia Limited (Australia)
NICE Classes  ?
  • 01 - Chemical and biological materials for industrial, scientific and agricultural use
  • 06 - Common metals and ores; objects made of metal
  • 40 - Treatment of materials; recycling, air and water treatment,

Goods & Services

Alumina; alumina fibre; alumina trihydrate; alumina (aluminium oxide); aluminium acetate; aluminium alum; aluminium chloride; aluminium compounds; aluminium halides; aluminium hydrate; aluminium silicate; aluminium salts; aluminium iodide; bauxite; activators to increase rate of chemical reaction; chemical additives; chemical additives for use in manufacture; chemical additives for use in the casting of metals; chemical additives for use in the moulding of metals; chemical preparations for aiding water quality; chemical preparations for forming coatings on metals; chemical preparations for soil treatment; chemical preparations for the binding of liquid waste; chemical preparations for use in foundries; chemical preparations for use in the manufacture of surface coatings; chemical preparations for use in water treatment; chemical products for use in foundry casting and tempering; chemical products for use in metal processing; chemical products for use in manufacturing; chemical products for use in the extraction of minerals; extraction chemicals; chemical additives for use in industry; chemical preparations for use in the metallurgical industry; chemicals used in industry; industrial chemicals; chemical products for use in industry Aluminium; aluminium alloys; aluminium discs; aluminium doors; aluminium foil; aluminium foil paper laminates; aluminium foils being packaging materials; aluminium foils being wrapping materials; aluminium framed modular platforms for use in theatres; aluminium frames; aluminium ladder rungs; aluminium moulds; aluminium profiles; aluminium sheets; aluminium slabs; aluminium strips; aluminium windows; aluminium wire; bauxite reinforced aluminium; bauxite reinforced aluminium alloys; building panels of aluminium; ceramic reinforced aluminium; ceramic reinforced aluminium alloys; coated aluminium; containers made of aluminium alloys (other than for household use); extruded aluminium alloys; extruded aluminium profiles; extruded aluminium sections; extrusions of aluminium; roof flashings of aluminium; prefabricated aluminium scaffolding frames Metallurgical processing; processing of materials; processing of waste materials; carbon offsetting services (recycling); recycling; recycling of metals; recycling plants; chemical recycling of waste products; refining; refining services; treatment of industrial waste; metallurgical smelting

6.

REFINERY OF THE FUTURE

      
Application Number 229057300
Status Pending
Filing Date 2023-10-02
Owner Alcoa of Australia Limited (Australia)
NICE Classes  ?
  • 01 - Chemical and biological materials for industrial, scientific and agricultural use
  • 06 - Common metals and ores; objects made of metal
  • 40 - Treatment of materials; recycling, air and water treatment,

Goods & Services

(1) Alumina; alumina fibre; alumina trihydrate; alumina (aluminium oxide); aluminium acetate; aluminium alum; aluminium chloride; aluminium compounds; aluminium halides; aluminium hydrate; aluminium silicate; aluminium salts; aluminium iodide; bauxite; activators to increase rate of chemical reaction; chemical additives; chemical additives for use in manufacture; chemical additives for use in the casting of metals; chemical additives for use in the moulding of metals; chemical preparations for aiding water quality; chemical preparations for forming coatings on metals; chemical preparations for soil treatment; chemical preparations for the binding of liquid waste; chemical preparations for use in foundries; chemical preparations for use in the manufacture of surface coatings; chemical preparations for use in water treatment; chemical products for use in foundry casting and tempering; chemical products for use in metal processing; chemical products for use in manufacturing; chemical products for use in the extraction of minerals; extraction chemicals; chemical additives for use in industry; chemical preparations for use in the metallurgical industry; chemicals used in industry; industrial chemicals; chemical products for use in industry. (2) Aluminium; aluminium alloys; aluminium discs; aluminium doors; aluminium foil; aluminium foil paper laminates; aluminium foils being packaging materials; aluminium foils being wrapping materials; aluminium framed modular platforms for use in theatres; aluminium frames; aluminium ladder rungs; aluminium moulds; aluminium profiles; aluminium sheets; aluminium slabs; aluminium strips; aluminium windows; aluminium wire; bauxite reinforced aluminium; bauxite reinforced aluminium alloys; building panels of aluminium; ceramic reinforced aluminium; ceramic reinforced aluminium alloys; coated aluminium; containers made of aluminium alloys (other than for household use); extruded aluminium alloys; extruded aluminium profiles; extruded aluminium sections; extrusions of aluminium; roof flashings of aluminium; prefabricated aluminium scaffolding frames. (1) Metallurgical processing; processing of materials; processing of waste materials; carbon offsetting services (recycling); recycling; recycling of metals; recycling plants; chemical recycling of waste products; refining; refining services; treatment of industrial waste; metallurgical smelting.

7.

METHOD FOR CALCINATION

      
Application Number AU2022050199
Publication Number 2022/187903
Status In Force
Filing Date 2022-03-11
Publication Date 2022-09-15
Owner ALCOA OF AUSTRALIA LIMITED (Australia)
Inventor
  • Chatfield, Raymond
  • Haggerty, Brian

Abstract

A method for calcination of hydrated alumina, the method comprising the steps of: heating the hydrated alumina in a dehydrating zone to reduce the water content of the hydrated alumina and provide partially calcined alumina; and heating the partially calcined alumina in a calcining zone to provide alumina, wherein the step of heating the hydrated alumina in a dehydrating zone uses at least in part, stored thermal energy, electrical energy, renewable energy or nuclear energy including combinations thereof and the step of heating the partially calcined alumina in a calcining zone uses at least in part, electrical energy or chemical potential energy including combinations thereof, and where the hydrated alumina is heated at least in part with stored thermal energy, the method is alternately operable in a thermal energy charging state and in a thermal energy discharging state.

IPC Classes  ?

  • C01F 7/44 - Dehydration of aluminium oxide or hydroxide, i.e. all conversions of one form into another involving a loss of water

8.

METHOD OF PREPARING ALUMINA

      
Application Number AU2022050180
Publication Number 2022/183251
Status In Force
Filing Date 2022-03-04
Publication Date 2022-09-09
Owner ALCOA OF AUSTRALIA LIMITED (Australia)
Inventor Lamacchia, Robert Joseph

Abstract

A process for preparing high purity alumina from aluminium-bearing materials is provided. The process digesting an aluminium bearing material to provide an aluminium chloride liquor, a first crystallisation vessel for crystallising aluminium chloride hexahydrate solids from the aluminium chloride liquor, optionally one or more subsequent crystallisation vessels for dissolving and recrystallising the aluminium chloride hexahydrate solids, and thermal treatment means for thermally treating the aluminium chloride hexahydrate solids to provide high purity alumina.

IPC Classes  ?

  • C01F 7/22 - Preparation of aluminium oxide or hydroxide from aluminous ores using acids or salts with halides or halogen acids
  • C01F 7/306 - Thermal decomposition of hydrated chlorides, e.g. of aluminium trichloride hexahydrate
  • C01F 7/56 - Chlorides

9.

PROCESS FOR PREPARING ALUMINA

      
Application Number 17686756
Status Pending
Filing Date 2022-03-04
First Publication Date 2022-06-16
Owner ALCOA OF AUSTRALIA LIMITED (Australia)
Inventor
  • Lamacchia, Robert Joseph
  • Baroni, Travis
  • Dye, Shannon Troy
  • Beckham, Kevin Ronald

Abstract

A process for preparing high purity alumina from aluminium-bearing materials originating from the Bayer process. The process comprising digesting the aluminium-bearing materials with hydrochloric acid to produce an aluminium chloride liquor and acid-insoluble solids and separating said solids from the aluminium chloride liquor, depleting the aluminium chloride liquor of one or more impurities, producing aluminium chloride hexahydrate solids from the produced aluminium chloride liquor, and thermally decomposing the produced aluminium chloride hexahydrate solids to produce high purity alumina.

IPC Classes  ?

  • C01F 7/306 - Thermal decomposition of hydrated chlorides, e.g. of aluminium trichloride hexahydrate
  • C01F 7/56 - Chlorides

10.

METHOD FOR CARBON REDUCTION

      
Application Number AU2021050855
Publication Number 2022/027100
Status In Force
Filing Date 2021-08-05
Publication Date 2022-02-10
Owner ALCOA OF AUSTRALIA LIMITED (Australia)
Inventor Chatfield, Raymond

Abstract

A method for controlling the carbon output from an alumina refinery, the method comprising the steps of capturing water vapour from a flash train in the refinery, compressing the captured water vapour and utilising at least a portion of the energy in the captured water vapour to heat a process stream within the alumina refinery.

IPC Classes  ?

  • B01D 1/00 - Evaporating
  • C01F 7/06 - Preparation of alkali metal aluminates; Aluminium oxide or hydroxide therefrom by treating aluminous minerals or waste-like raw materials with alkali hydroxide, e.g. leaching of bauxite according to the Bayer process
  • C01F 7/14 - Aluminium oxide or hydroxide from alkali metal aluminates
  • F28D 21/00 - Heat-exchange apparatus not covered by any of the groups

11.

FERTILIZER COMPOSITION

      
Application Number 17393086
Status Pending
Filing Date 2021-08-03
First Publication Date 2021-11-25
Owner ALCOA OF AUSTRALIA LIMITED (Australia)
Inventor
  • Mckinnon, Anthony
  • Higginbottom, Shani

Abstract

A fertilizer composition comprising an ammonium nitrate material and an effective amount of a stabilizer material to result in a specific impulse reduction of at least 10% when compared the specific impulse of a commercially available ammonium nitrate composition. The stabilizer material may comprise huntite or magnesite. In one embodiment, stabilizer material is about 10 to about 25 wt. % of the total fertilizer composition.

IPC Classes  ?

  • C05C 1/02 - Granulation; Pelletisation; Stabilisation; Colouring
  • C05G 3/00 - Mixtures of one or more fertilisers with additives not having a specifically fertilising activity

12.

PROCESS FOR PREPARING ALUMINA

      
Document Number 03149879
Status Pending
Filing Date 2020-09-07
Open to Public Date 2021-03-11
Owner ALCOA OF AUSTRALIA LIMITED (Australia)
Inventor
  • Lamacchia, Robert Joseph
  • Beckham, Kevin Ronald
  • Baroni, Travis
  • Dye, Shannon Troy

Abstract

A process for preparing high purity alumina from aluminium-bearing materials originating from the Bayer process. The process comprising digesting the aluminium-bearing materials with hydrochloric acid to produce an aluminium chloride liquor and acid-insoluble solids and separating said solids from the aluminium chloride liquor, depleting the aluminium chloride liquor of one or more impurities, producing aluminium chloride hexahydrate solids from the produced aluminium chloride liquor, and thermally decomposing the produced aluminium chloride hexahydrate solids to produce high purity alumina.

IPC Classes  ?

  • C22B 7/00 - Working-up raw materials other than ores, e.g. scrap, to produce non-ferrous metals or compounds thereof
  • C01F 7/22 - Preparation of aluminium oxide or hydroxide from aluminous ores using acids or salts with halides or halogen acids
  • C01F 7/30 - Preparation of aluminium oxide or hydroxide by thermal decomposition or by hydrolysis or oxidation of aluminium compounds
  • C01F 7/46 - Purification of aluminium oxide, aluminium hydroxide or aluminates
  • C01F 7/56 - Chlorides
  • C22B 7/02 - Working-up flue dust

13.

PROCESS FOR PREPARING ALUMINA

      
Application Number AU2020050939
Publication Number 2021/042176
Status In Force
Filing Date 2020-09-07
Publication Date 2021-03-11
Owner ALCOA OF AUSTRALIA LIMITED (Australia)
Inventor
  • Lamacchia, Robert Joseph
  • Baroni, Travis
  • Dye, Shannon Troy
  • Beckham, Kevin Ronald

Abstract

A process for preparing high purity alumina from aluminium-bearing materials originating from the Bayer process. The process comprising digesting the aluminium-bearing materials with hydrochloric acid to produce an aluminium chloride liquor and acid-insoluble solids and separating said solids from the aluminium chloride liquor, depleting the aluminium chloride liquor of one or more impurities, producing aluminium chloride hexahydrate solids from the produced aluminium chloride liquor, and thermally decomposing the produced aluminium chloride hexahydrate solids to produce high purity alumina.

IPC Classes  ?

  • C22B 7/00 - Working-up raw materials other than ores, e.g. scrap, to produce non-ferrous metals or compounds thereof
  • C22B 7/02 - Working-up flue dust
  • C01F 7/22 - Preparation of aluminium oxide or hydroxide from aluminous ores using acids or salts with halides or halogen acids
  • C01F 7/46 - Purification of aluminium oxide, aluminium hydroxide or aluminates
  • C01F 7/56 - Chlorides
  • C01F 7/30 - Preparation of aluminium oxide or hydroxide by thermal decomposition or by hydrolysis or oxidation of aluminium compounds

14.

Fluid Sampling Device

      
Application Number 16893260
Status Pending
Filing Date 2020-06-04
First Publication Date 2020-09-24
Owner Alcoa of Australia Limited (Australia)
Inventor
  • Mccaskie, Simon
  • Richards, Jake

Abstract

A fluid sampling device for sampling fluids in a fluid process vessel through a port in a wall of the vessel, the sampling device comprising a flexible tube with an open end in fluid communication with the fluid process vessel, means to attach the sampling device to the process vessel, wherein at least a portion of the flexible tube is adapted to extend into the process vessel, wherein the length of the flexible tube extending into the process vessel is at least 5 times the outer diameter of the flexible tube.

IPC Classes  ?

  • F16L 11/04 - Hoses, i.e. flexible pipes made of rubber or flexible plastics
  • G01N 1/20 - Devices for withdrawing samples in the liquid or fluent state for flowing or falling materials

15.

FERTILIZER COMPOSITION

      
Application Number AU2020050147
Publication Number 2020/168386
Status In Force
Filing Date 2020-02-20
Publication Date 2020-08-27
Owner ALCOA OF AUSTRALIA LIMITED (Australia)
Inventor
  • Mckinnon, Anthony
  • Higginbottom, Shani

Abstract

A fertilizer composition comprising an ammonium nitrate material; and an effective amount of a stabilizer material to result in a specific impulse reduction of at least 10 % when compared the specific impulse of a commercially available ammonium nitrate composition; wherein the stabilizer material comprises huntite and wherein the stabilizer material is about 10 to about 25 wt. % of the total fertilizer composition.

IPC Classes  ?

  • C05C 1/02 - Granulation; Pelletisation; Stabilisation; Colouring
  • C05G 3/00 - Mixtures of one or more fertilisers with additives not having a specifically fertilising activity

16.

FERTILIZER COMPOSITION

      
Document Number 03128258
Status Pending
Filing Date 2020-02-20
Open to Public Date 2020-08-27
Owner ALCOA OF AUSTRALIA LIMITED (Australia)
Inventor
  • Mckinnon, Anthony
  • Higginbottom, Shani

Abstract

A fertilizer composition comprising an ammonium nitrate material; and an effective amount of a stabilizer material to result in a specific impulse reduction of at least 10 % when compared the specific impulse of a commercially available ammonium nitrate composition; wherein the stabilizer material comprises huntite and wherein the stabilizer material is about 10 to about 25 wt. % of the total fertilizer composition.

IPC Classes  ?

  • C05C 1/02 - Granulation; Pelletisation; Stabilisation; Colouring
  • C05G 3/00 - Mixtures of one or more fertilisers with additives not having a specifically fertilising activity

17.

METHOD FOR CONTROLLING THE CONCENTRATION OF IMPURITIES IN BAYER LIQUORS

      
Document Number 03100733
Status Pending
Filing Date 2019-05-17
Open to Public Date 2019-12-05
Owner ALCOA OF AUSTRALIA LIMITED (Australia)
Inventor
  • Mckinnon, Anthony John
  • Larner, Bronwyn
  • Dye, Shannon

Abstract

A method for controlling the concentration of impurities in Bayer liquors, the method comprising the steps of adding an oxide and/or a hydroxide of a metal other than aluminium to a Bayer liquor with a desired TA; forming a layered double hydroxide; and incorporating at least one impurity in said layered double hydroxide, wherein the impurities are selected from the group comprising phosphorus, vanadium and silicon.

IPC Classes  ?

  • B01J 20/04 - Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising compounds of alkali metals, alkaline earth metals or magnesium
  • B01J 20/08 - Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising oxides or hydroxides of metals not provided for in group comprising bauxite
  • B01J 20/28 - Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof characterised by their form or physical properties

18.

METHOD FOR IMPURITY CONTROL

      
Document Number 03100735
Status Pending
Filing Date 2019-05-17
Open to Public Date 2019-12-05
Owner ALCOA OF AUSTRALIA LIMITED (Australia)
Inventor
  • Mckinnon, Anthony John
  • Larner, Bronwyn
  • Dye, Shannon

Abstract

A method for controlling the concentration of impurities in Bayer liquors, the method comprising the steps of adding an oxide and/or a hydroxide of a metal other than aluminium to a Bayer liquor with a desired TA forming a layered double hydroxide; and incorporating at least one impurity in said layered double hydroxide, wherein the impurities are selected from the group comprising chloride, fluoride, sulfate and TOC.

IPC Classes  ?

  • B01J 20/04 - Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising compounds of alkali metals, alkaline earth metals or magnesium
  • B01J 20/08 - Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising oxides or hydroxides of metals not provided for in group comprising bauxite
  • B01J 20/28 - Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof characterised by their form or physical properties

19.

METHOD FOR CONTROLLING THE CONCENTRATION OF IMPURITIES IN BAYER LIQUORS

      
Application Number AU2019050477
Publication Number 2019/227128
Status In Force
Filing Date 2019-05-17
Publication Date 2019-12-05
Owner ALCOA OF AUSTRALIA LIMITED (Australia)
Inventor
  • Mckinnon, Anthony John
  • Larner, Bronwyn
  • Dye, Shannon

Abstract

A method for controlling the concentration of impurities in Bayer liquors, the method comprising the steps of adding an oxide and/or a hydroxide of a metal other than aluminium to a Bayer liquor with a desired TA; forming a layered double hydroxide; and incorporating at least one impurity in said layered double hydroxide, wherein the impurities are selected from the group comprising phosphorus, vanadium and silicon.

IPC Classes  ?

  • C01F 7/47 - Purification of aluminium oxide, aluminium hydroxide or aluminates of aluminates, e.g. removal of compounds of Si, Fe, Ga or of organic compounds from Bayer process liquors
  • B01J 20/04 - Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising compounds of alkali metals, alkaline earth metals or magnesium
  • B01J 20/08 - Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising oxides or hydroxides of metals not provided for in group comprising bauxite
  • B01J 20/28 - Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof characterised by their form or physical properties

20.

METHOD FOR IMPURITY CONTROL

      
Application Number AU2019050479
Publication Number 2019/227130
Status In Force
Filing Date 2019-05-17
Publication Date 2019-12-05
Owner ALCOA OF AUSTRALIA LIMITED (Australia)
Inventor
  • Mckinnon, Anthony John
  • Larner, Bronwyn
  • Dye, Shannon

Abstract

A method for controlling the concentration of impurities in Bayer liquors, the method comprising the steps of adding an oxide and/or a hydroxide of a metal other than aluminium to a Bayer liquor with a desired TA forming a layered double hydroxide; and incorporating at least one impurity in said layered double hydroxide, wherein the impurities are selected from the group comprising chloride, fluoride, sulfate and TOC.

IPC Classes  ?

  • C01F 7/47 - Purification of aluminium oxide, aluminium hydroxide or aluminates of aluminates, e.g. removal of compounds of Si, Fe, Ga or of organic compounds from Bayer process liquors
  • B01J 20/04 - Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising compounds of alkali metals, alkaline earth metals or magnesium
  • B01J 20/08 - Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising oxides or hydroxides of metals not provided for in group comprising bauxite
  • B01J 20/28 - Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof characterised by their form or physical properties

21.

FLUID SAMPLING DEVICE

      
Application Number AU2018051306
Publication Number 2019/109145
Status In Force
Filing Date 2018-12-05
Publication Date 2019-06-13
Owner ALCOA OF AUSTRALIA LIMITED (Australia)
Inventor
  • Mccaskie, Simon
  • Richards, Jake

Abstract

A fluid sampling device for sampling fluids in a fluid process vessel through a port in a wall of the vessel, the sampling device comprising a flexible tube with an open end in fluid communication with the fluid process vessel, means to attach the sampling device to the process vessel, wherein at least a portion of the flexible tube is adapted to extend into the process vessel, wherein the length of the flexible tube extending into the process vessel is at least 5 times the outer diameter of the flexible tube.

IPC Classes  ?

  • G01N 1/20 - Devices for withdrawing samples in the liquid or fluent state for flowing or falling materials
  • G01N 1/10 - Devices for withdrawing samples in the liquid or fluent state
  • G01N 1/00 - Sampling; Preparing specimens for investigation

22.

FLUID SAMPLING DEVICE

      
Document Number 03084611
Status Pending
Filing Date 2018-12-05
Open to Public Date 2019-06-13
Owner ALCOA OF AUSTRALIA LIMITED (Australia)
Inventor
  • Mccaskie, Simon
  • Richards, Jake

Abstract

A fluid sampling device for sampling fluids in a fluid process vessel through a port in a wall of the vessel, the sampling device comprising a flexible tube with an open end in fluid communication with the fluid process vessel, means to attach the sampling device to the process vessel, wherein at least a portion of the flexible tube is adapted to extend into the process vessel, wherein the length of the flexible tube extending into the process vessel is at least 5 times the outer diameter of the flexible tube.

IPC Classes  ?

  • G01N 1/20 - Devices for withdrawing samples in the liquid or fluent state for flowing or falling materials
  • G01N 1/00 - Sampling; Preparing specimens for investigation
  • G01N 1/10 - Devices for withdrawing samples in the liquid or fluent state

23.

ONLINE SAMPLING DEVICE

      
Application Number AU2016000067
Publication Number 2016/141403
Status In Force
Filing Date 2016-03-04
Publication Date 2016-09-15
Owner ALCOA OF AUSTRALIA LIMITED (Australia)
Inventor Mccaskie, Simon

Abstract

An online sampling device comprising: a sampler; an analyser; a delay member; and ancillary equipment, wherein the delay member is downstream from the analyser and is adapted to inhibit exposure of a sample to the ancillary equipment and the ancillary equipment employs a sample removal fluid to remove sample from the device.

IPC Classes  ?

  • G01N 1/10 - Devices for withdrawing samples in the liquid or fluent state
  • G01N 1/02 - Devices for withdrawing samples

24.

Method of increasing the stability of a Bayer process liquor

      
Application Number 13820973
Grant Number 09187337
Status In Force
Filing Date 2011-09-05
First Publication Date 2014-01-09
Grant Date 2015-11-17
Owner Alcoa of Australia Limited (Australia)
Inventor
  • Hanna, Glen Alan
  • Loan, Mitch
  • Lee, Felicia Ai-Nee

Abstract

Methods, and related products and compositions, of increasing the stability of a Bayer process liquor are described. A method of increasing the stability of a Bayer process liquor includes contacting the Bayer process liquor with a ppm quantity of a low molecular weight dextran. Also described are methods, and related products and compositions, for controlling the precipitation of aluminum-containing compounds from a Bayer process liquor.

IPC Classes  ?

  • C01F 7/00 - Compounds of aluminium
  • C01F 7/06 - Preparation of alkali metal aluminates; Aluminium oxide or hydroxide therefrom by treating aluminous minerals or waste-like raw materials with alkali hydroxide, e.g. leaching of bauxite according to the Bayer process
  • C01F 7/04 - Preparation of alkali metal aluminates; Aluminium oxide or hydroxide therefrom
  • C01F 7/14 - Aluminium oxide or hydroxide from alkali metal aluminates
  • C01F 7/47 - Purification of aluminium oxide, aluminium hydroxide or aluminates of aluminates, e.g. removal of compounds of Si, Fe, Ga or of organic compounds from Bayer process liquors

25.

METHOD FOR CONTROLLING EMISSIONS

      
Application Number AU2012001151
Publication Number 2013/040658
Status In Force
Filing Date 2012-09-21
Publication Date 2013-03-28
Owner ALCOA OF AUSTRALIA LIMITED (Australia)
Inventor Ticehurst, Philip Lloyd

Abstract

A method for controlling mercury emissions from aqueous alkaline solutions from the Bayer circuit, the method comprising the steps of: introducing a source of copper ions to an aqueous alkaline solution containing sulfide ions; precipitating a copper species; and precipitating a mercury species; thereby facilitating mercury removal from the aqueous alkaline solution.

IPC Classes  ?

  • C22B 3/44 - Treatment or purification of solutions, e.g. obtained by leaching by chemical processes
  • B01D 53/64 - Heavy metals or compounds thereof, e.g. mercury
  • C22B 43/00 - Obtaining mercury
  • C01F 7/06 - Preparation of alkali metal aluminates; Aluminium oxide or hydroxide therefrom by treating aluminous minerals or waste-like raw materials with alkali hydroxide, e.g. leaching of bauxite according to the Bayer process

26.

PROCESS FOR THE DESTRUCTION OF ORGANICS IN BAYER PROCESS STREAMS

      
Application Number AU2011001636
Publication Number 2012/094696
Status In Force
Filing Date 2011-12-16
Publication Date 2012-07-19
Owner ALCOA OF AUSTRALIA LIMITED (Australia)
Inventor
  • Mckinnon, Anthony John
  • Baker, Christopher Lawrence

Abstract

A process for the destruction of organics in a Bayer process stream, the process comprising the steps of: a) Passing a volume of a Bayer process stream to a reactor vessel in which is provided a population of a mixed bacterial culture; and b) Retaining that volume of the Bayer process stream in the reactor vessel for a period of time during which at least 10% by mass as carbon of the organic compounds destroyed originate from non-oxalate organic compounds, wherein the mixed bacterial culture comprises a mix of bacterial species capable of destroying organics and which has previously been adapted to the Bayer process stream, or a stream of substantially similar composition, prior to introduction to the reactor vessel.

IPC Classes  ?

  • C01F 7/46 - Purification of aluminium oxide, aluminium hydroxide or aluminates
  • C02F 3/00 - Biological treatment of water, waste water, or sewage
  • C02F 3/34 - Biological treatment of water, waste water, or sewage characterised by the microorganisms used
  • C02F 9/14 - Multistep treatment of water, waste water or sewage at least one step being a biological treatment
  • C02F 101/30 - Organic compounds
  • C02F 103/10 - Nature of the water, waste water, sewage or sludge to be treated from quarries or from mining activities

27.

Method and apparatus for odorant removal

      
Application Number 13389718
Grant Number 09186596
Status In Force
Filing Date 2011-02-17
First Publication Date 2012-07-12
Grant Date 2015-11-17
Owner Alcoa of Australia Limited (Australia)
Inventor Hay, Peter Stewart

Abstract

Odorant from a process stream is removed by passing the stream (18) to a counter-current contacting device (12) for stripping odorants. The odorants passes from the contacting device (12) as contaminated steam (26) while the remaining process stream passes directly to a “tube side” of a falling film evaporator (14) and is heated producing steam that passes into the counter-current contacting device (12) to strip that process stream and produce the contaminated steam (26). This contaminated steam from the contacting device (12) passes through a vapor compression step (16) from which it is introduced into a “shell side” of the falling film evaporator (14) and in which it heats the process stream passing from the contacting device (12) into the evaporator (14). The contaminated steam that is not condensed in the falling film evaporator passes as a low flow vent gas (50) in which the odorants have been concentrated.

IPC Classes  ?

  • B01D 1/22 - Evaporating by bringing a thin layer of the liquid into contact with a heated surface
  • B01D 19/00 - Degasification of liquids
  • B01D 1/06 - Evaporators with vertical tubes
  • B01D 5/00 - Condensation of vapours; Recovering volatile solvents by condensation
  • B01D 1/28 - Evaporating with vapour compression
  • B01D 1/30 - Accessories for evaporators
  • B01D 3/38 - Steam distillation

28.

METHOD OF INCREASING THE STABILITY OF A BAYER PROCESS LIQUOR

      
Application Number AU2011001143
Publication Number 2012/031316
Status In Force
Filing Date 2011-09-05
Publication Date 2012-03-15
Owner ALCOA OF AUSTRALIA LIMITED (Australia)
Inventor
  • Hanna, Glen Alan
  • Loan, Mitch
  • Lee, Felicia Ai-Nee

Abstract

A method of increasing the stability of a Bayer process liquor, the method comprising at least the step of: contacting the Bayer process liquor with a ppm quantity of a low molecular weight dextran. Also described is a method for controlling the precipitation of aluminium- containing compounds from a Bayer process liquor.

IPC Classes  ?

  • C01F 7/06 - Preparation of alkali metal aluminates; Aluminium oxide or hydroxide therefrom by treating aluminous minerals or waste-like raw materials with alkali hydroxide, e.g. leaching of bauxite according to the Bayer process

29.

METHOD AND APPARATUS FOR ODORANT REMOVAL

      
Document Number 02770513
Status In Force
Filing Date 2010-08-10
Open to Public Date 2011-02-17
Grant Date 2017-09-12
Owner ALCOA OF AUSTRALIA LIMITED (Australia)
Inventor Hay, Peter Stewart

Abstract

Odorant from a process stream is removed by passing the stream (18) to a counter-current contacting device (12) for stripping odorants. The odorants passes from the contacting device (12) as contaminated steam (26) whilst the remaining process stream passes directly to a "tube side" of a falling film evaporator (14) and is heated producing steam that passes into the counter-current contacting device (12) to strip that process stream and produce the contaminated steam (26). This contaminated steam from the contacting device (12) passes through a vapour compression step (16) from which it is introduced into a "shell side" of the falling film evaporator (14) and in which it heats the process stream passing from the contacting device (12) into the evaporator (14). The contaminated steam that is not condensed in the falling film evaporator passes as a low flow vent gas (50) in which the odorants have been concentrated.

IPC Classes  ?

  • B01D 1/06 - Evaporators with vertical tubes
  • B01D 1/12 - Evaporators with vertical tubes and forced circulation
  • B01D 1/28 - Evaporating with vapour compression
  • B01D 3/00 - Distillation or related exchange processes in which liquids are contacted with gaseous media, e.g. stripping
  • C02F 1/08 - Thin film evaporation

30.

METHOD AND APPARATUS FOR ODORANT REMOVAL

      
Application Number AU2010001011
Publication Number 2011/017744
Status In Force
Filing Date 2010-08-10
Publication Date 2011-02-17
Owner ALCOA OF AUSTRALIA LIMITED (Australia)
Inventor Hay, Peter Stewart

Abstract

Odorant from a process stream is removed by passing the stream (18) to a counter-current contacting device (12) for stripping odorants. The odorants passes from the contacting device (12) as contaminated steam (26) whilst the remaining process stream passes directly to a "tube side" of a falling film evaporator (14) and is heated producing steam that passes into the counter-current contacting device (12) to strip that process stream and produce the contaminated steam (26). This contaminated steam from the contacting device (12) passes through a vapour compression step (16) from which it is introduced into a "shell side" of the falling film evaporator (14) and in which it heats the process stream passing from the contacting device (12) into the evaporator (14). The contaminated steam that is not condensed in the falling film evaporator passes as a low flow vent gas (50) in which the odorants have been concentrated.

IPC Classes  ?

  • B01D 1/06 - Evaporators with vertical tubes
  • B01D 1/12 - Evaporators with vertical tubes and forced circulation
  • B01D 1/28 - Evaporating with vapour compression
  • B01D 3/00 - Distillation or related exchange processes in which liquids are contacted with gaseous media, e.g. stripping
  • C02F 1/08 - Thin film evaporation

31.

DRILLING APPARATUS

      
Application Number AU2010000973
Publication Number 2011/011836
Status In Force
Filing Date 2010-08-02
Publication Date 2011-02-03
Owner ALCOA OF AUSTRALIA LIMITED (Australia)
Inventor Crabb, Steven Mark

Abstract

A drilling apparatus (100) for clearing of a blockage in a tapping point on a pipeline or vessel under pressure. The drilling apparatus (100) may also be used for installation of a tapping point on a pipeline or vessel under pressure. The drilling apparatus (100) comprises a body (11) adapted for connection to the tapping point. The body (11) defines an internal passage (18) through which a drill shaft (41) can be advanced to the tapping point for clearing the blockage therein. The drilling apparatus (100) further comprises a first drive means (51) for rotating the drill shaft (41) to perform a drilling operation and a second drive means (52) for moving the first drive means (51) to cause axial movement of the drill shaft (41). The drilling apparatus (100) further comprises a control means (not shown) operable remotely to selectively control operation of the first drive means (51) and the second drive means (52). The body (11) has provision to allow the drill shaft (41) to penetrate the tapping point while isolating the fluid contents under pressure within the pipeline or vessel.

IPC Classes  ?

  • B23B 41/08 - Boring or drilling machines or devices specially adapted for particular work; Accessories specially adapted therefor for boring, drilling, or tapping holes in tubes under fluid or gas pressure
  • B23B 47/20 - Drives; Gearings for feeding or retracting tool or work actuated essentially by electric power
  • F16L 41/04 - Tapping pipe walls, i.e. making connections through the walls of pipes while they are carrying fluids; Fittings therefor

32.

METHOD OF CONCENTRATING A BAYER PROCESS LIQUOR

      
Application Number AU2009000328
Publication Number 2009/114910
Status In Force
Filing Date 2009-03-19
Publication Date 2009-09-24
Owner ALCOA OF AUSTRALIA LIMITED (Australia)
Inventor
  • Ilievski, Dean
  • Hay, Peter Stewart

Abstract

A method for concentrating spent Bayer process liquor, the method comprising the steps of: Passing at least a portion of a calciner flue gas to a separator to provide a dehydrated gas stream and a water vapour enriched stream Contacting the spent Bayer process liquor with the water vapour enriched stream; and Evaporating water from the spent Bayer process liquor, thereby concentrating the spent Bayer process liquor.

IPC Classes  ?

  • B01D 1/00 - Evaporating
  • C01F 7/04 - Preparation of alkali metal aluminates; Aluminium oxide or hydroxide therefrom

33.

METHOD FOR PRECIPITATING BOEHMITE FROM PRE-PRECIPITATION BAYER LIQUORS

      
Application Number AU2008001447
Publication Number 2009/039592
Status In Force
Filing Date 2008-09-26
Publication Date 2009-04-02
Owner ALCOA OF AUSTRALIA LIMITED (Australia)
Inventor
  • Besida, John
  • Ilievski, Dean

Abstract

A method for precipitating boehmite from a pre-precipitation Bayer liquor, the method comprising the steps of: treating the pre-precipitation liquor to decrease both the total caustic concentration and the total alkalinity of the pre-precipitation liquor; and pre-precipitating boehmite from the treated pre-precipitation liquor, wherein at least a portion of the boehmite is precipitated at a temperature of at least 105 °C.

IPC Classes  ?

  • C01F 7/02 - Aluminium oxide; Aluminium hydroxide; Aluminates
  • C01F 7/06 - Preparation of alkali metal aluminates; Aluminium oxide or hydroxide therefrom by treating aluminous minerals or waste-like raw materials with alkali hydroxide, e.g. leaching of bauxite according to the Bayer process
  • C01F 7/14 - Aluminium oxide or hydroxide from alkali metal aluminates

34.

METHOD FOR CONTROLLING THE PRECIPITATION OF ALUMINA

      
Application Number AU2008001025
Publication Number 2009/009824
Status In Force
Filing Date 2008-07-11
Publication Date 2009-01-22
Owner ALCOA OF AUSTRALIA LIMITED (Australia)
Inventor
  • Besida, John
  • Delmau, Lætitia, Hélène
  • Moyer, Bruce, April

Abstract

A method for controlling the precipitation of alumina from a Bayer process solution, the method comprising the steps of: contacting the Bayer process solution with a solid support comprising an extractant, wherein the solid support is substantially water insoluble; removing sodium ions from the Bayer process solution; reducing the concentration of hydroxide ions in the Bayer process solution; and precipitating alumina in the Bayer process solution.

IPC Classes  ?

  • C01F 7/02 - Aluminium oxide; Aluminium hydroxide; Aluminates
  • C01F 7/47 - Purification of aluminium oxide, aluminium hydroxide or aluminates of aluminates, e.g. removal of compounds of Si, Fe, Ga or of organic compounds from Bayer process liquors

35.

ELECTROLYTIC METHOD FOR CONTROLLING THE PRECIPITATION OF ALUMINA

      
Application Number AU2008000953
Publication Number 2009/000050
Status In Force
Filing Date 2008-06-27
Publication Date 2008-12-31
Owner ALCOA OF AUSTRALIA LIMITED (Australia)
Inventor
  • Besida, John
  • Parkinson, Gordon
  • Genders, J. David

Abstract

A method for controlling the precipitation of alumina from a Bayer process solution, the method comprising the steps of: applying a potential between a first region comprising a Bayer process liquor and a second region comprising a caustic solution, wherein an ion permeable membrane is provided between the first region and the second region; and causing transfer of an ion across the ion permeable membrane from one region to the other region, wherein the Bayer process liquor is not directed to the second region.

IPC Classes  ?

36.

METHOD FOR PREPARING ALUMINIUM OXIDE

      
Application Number AU2008000422
Publication Number 2008/116260
Status In Force
Filing Date 2008-03-27
Publication Date 2008-10-02
Owner ALCOA OF AUSTRALIA LIMITED (Australia)
Inventor
  • Ilievski, Dean
  • Besida, John

Abstract

A method for preparing aluminium oxide from a Bayer process solution, the method comprising the steps of: precipitating a first alumina product and providing a first spent liquor; separating at least a portion of the first alumina product and the first spent liquor; treating at least a portion of the first spent liquor to decrease both the total caustic concentration and the total alkalinity of the treated first spent liquor; precipitating a second alumina product from the treated first spent liquor and providing a second spent liquor; separating at least a portion of the second alumina product and the second spent liquor; calcining at least a portion of the first alumina product in a calciner; and calcining at least a portion of the second alumina product in the calciner, wherein the first alumina product is gibbsite or boehmite, or a combination thereof and the second alumina product is gibbsite or boehmite, or a combination thereof.

IPC Classes  ?

  • C01F 7/02 - Aluminium oxide; Aluminium hydroxide; Aluminates
  • C01F 7/06 - Preparation of alkali metal aluminates; Aluminium oxide or hydroxide therefrom by treating aluminous minerals or waste-like raw materials with alkali hydroxide, e.g. leaching of bauxite according to the Bayer process
  • C01F 7/34 - Preparation of aluminium hydroxide by precipitation from solutions containing aluminium salts
  • C01F 7/46 - Purification of aluminium oxide, aluminium hydroxide or aluminates

37.

METHOD FOR PRECIPITATING BOEHMITE

      
Application Number AU2008000421
Publication Number 2008/116259
Status In Force
Filing Date 2008-03-27
Publication Date 2008-10-02
Owner ALCOA OF AUSTRALIA LIMITED (Australia)
Inventor
  • Ilievski, Dean
  • Besida, John

Abstract

A method for precipitating boehmite from a Bayer process solution, the method comprising the steps of: treating at least a portion of a first spent liquor to decrease both the total caustic concentration and the total alkalinity of the liquor; combining at least a portion of the treated spent liquor with at least a portion of a green liquor; precipitating boehmite from the combination of the green liquor and the treated spent liquor and producing a second spent liquor; and separating at least a portion of the boehmite and the second spent liquor.

IPC Classes  ?

  • C01F 7/02 - Aluminium oxide; Aluminium hydroxide; Aluminates
  • C01F 7/06 - Preparation of alkali metal aluminates; Aluminium oxide or hydroxide therefrom by treating aluminous minerals or waste-like raw materials with alkali hydroxide, e.g. leaching of bauxite according to the Bayer process
  • C01F 7/14 - Aluminium oxide or hydroxide from alkali metal aluminates

38.

TREATMENT OF CONTAMINANTS

      
Application Number AU2008000010
Publication Number 2008/083433
Status In Force
Filing Date 2008-01-08
Publication Date 2008-07-17
Owner ALCOA OF AUSTRALIA LIMITED (Australia)
Inventor
  • Mullett, Mark
  • Forder, Paul
  • Macintosh, Peter

Abstract

A method for the treatment of contaminants in an aqueous stream, the method comprising the steps of: decreasing the pH of the aqueous stream; passing at least a portion of the aqueous stream through a membrane; separating the aqueous stream into a permeate and a retentate; air stripping of at least a portion of the retentate to reduce the odour of the retentate.

IPC Classes  ?

  • C02F 1/20 - Treatment of water, waste water, or sewage by degassing, i.e. liberation of dissolved gases
  • C02F 1/44 - Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
  • C02F 9/02 - Multistep treatment of water, waste water or sewage involving a separation step

39.

TORQUE REACTION MECHANISM FOR A VALVE ARRANGEMENT

      
Application Number AU2007001664
Publication Number 2008/052267
Status In Force
Filing Date 2007-10-31
Publication Date 2008-05-08
Owner ALCOA OF AUSTRALIA LIMITED (Australia)
Inventor
  • Horton, Ramon
  • Wheel, Frank
  • Leonard, Wayne

Abstract

A torque reaction mechanism comprising a coupling arrangement (170) operable between an apparatus (10) having a rotary drive input (120) such as a drive socket, and a powered driving tool (160) for delivering rotational torque to the rotary drive input (120). The coupling arrangement (170) acts to transfer reaction torque away from the operator of the powered driving tool (160). The coupling arrangement (170) comprises a first (fixed) coupling element (171) disposed around the rotary drive input (120), and a second (corresponding) coupling element (172) on the powered driving tool 160. The arrangement is such that cooperation between the two coupling elements (171, 172) is adapted to allow displacement therebetween in the direction corresponding to the axis of rotation of the driving tool (160) while constraining the two coupling elements against relative rotation about the axis of rotation. With this arrangement, reaction torque arising from operation of the powered driving tool (160) is transferred through the coupling element (172) on the tool (160) to the respective fixed coupling element (171). In this way, an operator holding the powered driving tool (160) merely has to guide the tool during its operation and does not have to counteract any reaction torque. The first coupling element (171) is configured as a sleeve (175) disposed around the rotary drive input (120). The second coupling element 172 is configured as a block (177) which is rigidly mounted on the body (163) of the driving tool (160) and which is adapted to be received in the sleeve (175) for sliding movement therealong.

IPC Classes  ?

  • F16K 31/44 - Mechanical actuating means
  • B25B 33/00 - Hand tools not covered by any other group in this subclass
  • F16D 3/06 - Yielding couplings, i.e. with means permitting movement between the connected parts during the drive adapted to specific functions specially adapted to allow axial displacement
  • B25B 21/02 - Portable power-driven screw or nut setting or loosening tools; Attachments for drilling apparatus serving the same purpose with means for imparting impact to screwdriver blade or nut socket
  • B25F 3/00 - Associations of tools for different working operations with one portable power-drive means; Adapters therefor

40.

VALVE OPERATION

      
Application Number AU2007001665
Publication Number 2008/052268
Status In Force
Filing Date 2007-10-31
Publication Date 2008-05-08
Owner ALCOA OF AUSTRALIA LIMITED (Australia)
Inventor
  • Horton, Ramon
  • Wheel, Frank
  • Mckenna, Robert
  • Leonard, Wayne

Abstract

An operating mechanism (40) for a valve (11) having a valve body (13) defining a valve seat (19) and a valve member (21) moveable into and out of engagement with the valve seat (19). The valve member (21) comprises a valve disc (25), a valve stem (23), and a bush (29) through which the valve stem (23) extends in threaded engagement therewith whereby relative rotation between the bush (29) and the valve stem (23) causes axial displacement of the valve stem (23) relative to the bush (29). The operating mechanism (40) comprises two operating drive sockets (104, 106) in opposed relation, each of which is drivingly connected to the bush (29). The operating mechanism (40) also comprises two unlocking drive sockets (118, 120) in opposed relation, each of which is drivingly connected to the bush (29). The drive ratio between the operating drive sockets (104, 106) and the bush (29), and the drive ratio between the unlocking drive sockets (118, 120) and the bush (29) are different from each other such that a larger torque is delivered to the bush (29) from operation of either one of the unlocking drive sockets (118, 120) in comparison to the torque delivered to the bush (29) from operation of the either one of the operating drive sockets (104, 106) for the same torque input. With this arrangement, either one of the unlocking drive sockets (118, 120) can be used for unlocking the valve; that is, to move the valve member (21) into a 'just open' or throttled position in which the valve disc (25) is out of sealing engagement with the valve seat (19) without rotation of the valve stem (23). Further, either one of the operating drive sockets (104, 106) can be used for opening and closing the valve (11), as well as valve locking. Because there are two operating drive sockets (104, 106) in opposed relation, and also two unlocking drive sockets (118, 120) also in opposed relation, an operator can access the operating mechanism (40) from either side thereof according to what is more convenient.

IPC Classes  ?

  • F16K 1/02 - Lift valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces with screw-spindle
  • F16K 1/04 - Lift valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces with screw-spindle with a cut-off member rigid with the spindle, e.g. main valves
  • F16K 1/32 - Lift valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces - Details
  • F16K 31/00 - Operating means; Releasing devices
  • E03B 7/00 - Water main or service pipe systems
  • E03B 9/00 - Methods or installations for drawing-off water
  • E03B 7/02 - Public or like main pipe systems

41.

METHOD FOR ALUMINA PRODUCTION

      
Application Number AU2007001617
Publication Number 2008/052249
Status In Force
Filing Date 2007-10-24
Publication Date 2008-05-08
Owner ALCOA OF AUSTRALIA LIMITED (Australia)
Inventor Mills, Gregory

Abstract

A method for the calcination of aluminium trihydroxide, the method comprising the steps of: directly contacting the aluminium trihydroxide with steam; and calcining at least a portion of the aluminium trihydroxide to alumina and/or aluminium oxyhydroxide.

IPC Classes  ?

  • C01F 7/44 - Dehydration of aluminium oxide or hydroxide, i.e. all conversions of one form into another involving a loss of water
  • C01F 7/30 - Preparation of aluminium oxide or hydroxide by thermal decomposition or by hydrolysis or oxidation of aluminium compounds
  • C01F 7/02 - Aluminium oxide; Aluminium hydroxide; Aluminates
  • C01F 7/46 - Purification of aluminium oxide, aluminium hydroxide or aluminates

42.

METHOD OF CONCENTRATING A BAYER PROCESS LIQUOR

      
Application Number AU2007001407
Publication Number 2008/034196
Status In Force
Filing Date 2007-09-21
Publication Date 2008-03-27
Owner ALCOA OF AUSTRALIA LIMITED (Australia)
Inventor
  • Ilievski, Dean
  • Hay, Peter Stewart

Abstract

A method for concentrating spent Bayer process liquor, the method comprising the steps of: recovering heat from a Bayer process calciner flue gas; applying at least a portion of the recovered heat to the spent Bayer process liquor; and evaporating water from the spent Bayer process liquor, thereby concentrating the spent Bayer process liquor.

IPC Classes  ?

  • B01D 1/00 - Evaporating
  • C01F 7/04 - Preparation of alkali metal aluminates; Aluminium oxide or hydroxide therefrom
  • F28D 15/02 - Heat-exchange apparatus with the intermediate heat-transfer medium in closed tubes passing into or through the conduit walls in which the medium condenses and evaporates, e.g. heat-pipes

43.

METHOD FOR MANAGEMENT OF CONTAMINANTS IN ALKALINE PROCESS LIQUORS

      
Application Number AU2007001105
Publication Number 2008/017109
Status In Force
Filing Date 2007-08-06
Publication Date 2008-02-14
Owner ALCOA OF AUSTRALIA LIMITED (Australia)
Inventor Jamieson, Evan John

Abstract

A method for the management of contaminants in an alkaline process circuit, the method including the steps of: adding a source of silica to an alkaline process liquor from the alkaline process circuit; adding a source of alumina to the alkaline process liquor; and forming a geopolymer.

IPC Classes  ?

  • C01F 7/34 - Preparation of aluminium hydroxide by precipitation from solutions containing aluminium salts
  • C01F 7/46 - Purification of aluminium oxide, aluminium hydroxide or aluminates
  • C01F 7/47 - Purification of aluminium oxide, aluminium hydroxide or aluminates of aluminates, e.g. removal of compounds of Si, Fe, Ga or of organic compounds from Bayer process liquors
  • C01B 33/12 - Silica; Hydrates thereof, e.g. lepidoic silicic acid
  • C01B 33/14 - Colloidal silica, e.g. dispersions, gels, sols
  • C01B 33/26 - Aluminium-containing silicates
  • C01B 33/141 - Preparation of hydrosols or aqueous dispersions

44.

METHOD OF REDUCING CALCIA CONCENTRATIONS OF GREEN BAYER PROCESS LIQUORS

      
Application Number AU2007000460
Publication Number 2007/115365
Status In Force
Filing Date 2007-04-05
Publication Date 2007-10-18
Owner ALCOA OF AUSTRALIA LIMITED (Australia)
Inventor
  • Roach, Gerald
  • Cornell, John, Bernard
  • De Witt, Geraldine, Charmaine
  • Riley, Geoffrey, William
  • Hanna, Glen

Abstract

A method of reducing the calcia concentration of a green Bayer process liquor containing calcia and phosphate, the method comprising the step of: contacting the green Bayer process liquor with a quantity of apatite; thereby inducing the precipitation of further apatite and reducing the calcia concentration of the green Bayer process liquor.

IPC Classes  ?

  • C01F 7/04 - Preparation of alkali metal aluminates; Aluminium oxide or hydroxide therefrom
  • C01F 7/06 - Preparation of alkali metal aluminates; Aluminium oxide or hydroxide therefrom by treating aluminous minerals or waste-like raw materials with alkali hydroxide, e.g. leaching of bauxite according to the Bayer process
  • C01F 7/46 - Purification of aluminium oxide, aluminium hydroxide or aluminates

45.

METHOD FOR CONTROLLING THE PRECIPITATION OF ALUMINA

      
Application Number AU2007000426
Publication Number 2007/112497
Status In Force
Filing Date 2007-03-30
Publication Date 2007-10-11
Owner ALCOA OF AUSTRALIA LIMITED (Australia)
Inventor Besida, John

Abstract

A method for controlling the precipitation of alumina from Bayer process solutions, the method comprising the steps of: contacting the Bayer process solution with a substantially water- immiscible solution comprising an extractant; extracting at least a portion of the metal cations present in the Bayer process solution into the substantially water-immiscible solution; thereby reducing the concentration of hydroxide ions in the Bayer process solution.

IPC Classes  ?

  • C01F 7/02 - Aluminium oxide; Aluminium hydroxide; Aluminates
  • C01F 7/34 - Preparation of aluminium hydroxide by precipitation from solutions containing aluminium salts
  • C01F 7/47 - Purification of aluminium oxide, aluminium hydroxide or aluminates of aluminates, e.g. removal of compounds of Si, Fe, Ga or of organic compounds from Bayer process liquors

46.

BIODEGRADATION OF ORGANIC COMPOUNDS

      
Application Number AU2006000109
Publication Number 2007/085039
Status In Force
Filing Date 2006-01-30
Publication Date 2007-08-02
Owner ALCOA OF AUSTRALIA LIMITED (Australia)
Inventor
  • Tilbury, Amanda
  • Nyeboer, Hugh
  • Cooling, David, John
  • Sumich, Matthew

Abstract

A method for the biodegradation of organic compounds in a Bayer circuit, the method including the steps of: treating a portion of the Bayer circuit to provide a pH of between about 8 and about 12 wherein the portion of the Bayer circuit comprises an alkaliphilic microorganism and an electron acceptor and the microorganism is capable of anaerobic respiration in the presence of the electron acceptor, such that at least a portion of the organic compounds are anaerobically degraded by the microorganism.

IPC Classes  ?

  • C01F 7/47 - Purification of aluminium oxide, aluminium hydroxide or aluminates of aluminates, e.g. removal of compounds of Si, Fe, Ga or of organic compounds from Bayer process liquors
  • C22B 3/18 - Extraction of metal compounds from ores or concentrates by wet processes with the aid of microorganisms or enzymes, e.g. bacteria or algae

47.

SEAL ASSEMBLY

      
Application Number AU2006001384
Publication Number 2007/033421
Status In Force
Filing Date 2006-09-21
Publication Date 2007-03-29
Owner
  • PUMP TECHNOLOGY SERVICES PTY LTD (Australia)
  • ALCOA OF AUSTRALIA LIMITED (Australia)
Inventor Murray, Anthony, Joseph

Abstract

A centrifugal pump seal assembly (10) for forming a seal between an impeller (12) and its casing (14), the seal assembly (10) comprising at least one sealing member (20) supported on the casing (14) and being capable of movement to a position at which it sealingly contacts the impeller (14), the movement of the sealing member (20) being actuated by fluid pressure generated at the outlet side (18) of the casing (14), and wherein the seal is maintained by the continual fluid pressure applied to the sealing member (14) when the pump is in use.

IPC Classes  ?

  • F16J 15/46 - Sealings with packing ring expanded or pressed into place by fluid pressure, e.g. inflatable packings
  • F01D 11/00 - Preventing or minimising internal leakage of working fluid, e.g. between stages
  • F04D 29/16 - Sealings between pressure and suction sides

48.

VALVE GRINDING

      
Application Number AU2006001062
Publication Number 2007/012136
Status In Force
Filing Date 2006-07-28
Publication Date 2007-02-01
Owner ALCOA OF AUSTRALIA LIMITED (Australia)
Inventor
  • Leonard, Wayne, Arthur
  • Winton, Geoffrey, Laurence
  • Goh, Kim, Hua
  • Horton, Ramon, Keith

Abstract

Apparatus (10) for use with a valve (11) to perform a grinding operation on the valve. The valve (11) has a valve body (13) defining a valve seat (19) and a valve member (21) moveable into and out of engagement with the valve seat (19). The valve member (21) comprises a valve disc (25) and a valve stem (23). The valve (11) also has a bush (29) through which the valve stem (23) extends in threaded engagement therewith whereby relative rotation between the bush (29) and the valve stem (23) causes axial displacement of the valve stem (23) relative to the bush (29). The apparatus (10) comprises a drive transmission means (55) for providing a driving connection to the bush (29) and the valve stem (23). The drive transmission means (55) has first and second modes of operation, wherein in the first mode of operation the drive transmission means causes the bush (29) to rotate with the valve stem (23) such that the valve stem rotates without undergoing axial movement and wherein in the second mode of operation the drive transmission means (55) causes relative rotation between the bush (29) and the valve stem (23) such that the valve stem undergoes axial movement while rotating. The apparatus (10) has means including hand wheel (245) for selectively causing the drive transmission means (55) to operate in either one of the first and second modes of operation during rotation of the valve stem (23).

IPC Classes  ?

  • F16K 29/00 - Arrangements for movement of valve members other than for opening or closing the valve, e.g. for grinding-in, for preventing sticking
  • F16K 1/24 - Lift valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces with valve members that, on opening of the valve, are initially lifted from the seat and next are turned around an axis parallel to the seat
  • F16K 1/50 - Preventing rotation of valve members
  • F16K 1/02 - Lift valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces with screw-spindle
  • F16K 1/32 - Lift valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces - Details
  • F16K 31/04 - Operating means; Releasing devices magnetic using a motor
  • F16K 1/04 - Lift valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces with screw-spindle with a cut-off member rigid with the spindle, e.g. main valves
  • F16K 1/38 - Valve members of conical shape
  • F16K 31/05 - Operating means; Releasing devices magnetic using a motor specially adapted for operating hand-operated valves or for combined motor and hand operation

49.

VALVE OPERATION

      
Application Number AU2006001061
Publication Number 2007/012135
Status In Force
Filing Date 2006-07-28
Publication Date 2007-02-01
Owner ALCOA OF AUSTRALIA LIMITED (Australia)
Inventor
  • Leonard, Wayne, Arthur
  • Winton, Geoffrey, Laurence
  • Goh, Kim, Hua
  • Horton, Ramon, Keith

Abstract

An operating mechanism (10) for a valve (11). The valve (11) has a valve body (13) defining a valve seat (19) and a valve member (21) moveable into and out of engagement with the valve seat (19). The valve member (21) comprises a valve disc (25) and a valve stem (23). The valve (11) also has a bush (29) through which the valve stem (23) extends in threaded engagement therewith whereby relative rotation between the bush (29) and the valve stem (23) causes axial displacement of the valve stem (23) relative to the bush (29). The apparatus (10) comprises a locking drive input (109) and an unlocking drive input (119), each of which is drivingly connected to the bush (29). The drive ratio between the respective drive inputs (109, 119) and the bush (29) are different from each other such that a larger torque is delivered to the bush (29) from the unlocking drive input (119) in comparison to the torque delivered to the bush (29) from the locking drive input (109) for the same torque input.

IPC Classes  ?

  • F16K 29/00 - Arrangements for movement of valve members other than for opening or closing the valve, e.g. for grinding-in, for preventing sticking
  • F16K 1/02 - Lift valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces with screw-spindle
  • F16K 1/04 - Lift valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces with screw-spindle with a cut-off member rigid with the spindle, e.g. main valves
  • F16K 31/04 - Operating means; Releasing devices magnetic using a motor
  • F16K 31/05 - Operating means; Releasing devices magnetic using a motor specially adapted for operating hand-operated valves or for combined motor and hand operation

50.

HEAT EXCHANGE APPARATUS

      
Application Number AU2006000256
Publication Number 2006/092005
Status In Force
Filing Date 2006-02-28
Publication Date 2006-09-08
Owner ALCOA OF AUSTRALIA LIMITED (Australia)
Inventor Goh, Kim

Abstract

A heat exchange apparatus (10) comprising an arrangement of relatively small diameter tubes (30) extending substantially longitudinally through a shell (12), the shell (12) having provided an inlet (16) and an outlet (18) for the ingress and egress of a material from which heat is to be transferred, and the tubes (30) being provided with both an inlet and an outlet for a material to which heat is to be transferred, wherein there are at least two such shell and tube arrangements provided and between which the material to be heated is to be transferred, and a transfer line connecting the at least two shell and tube arrangements, characterised in that the transfer line is provided in a form that discourages settling of solids entrained in the material to be heated.

IPC Classes  ?

  • F28D 7/16 - Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits being arranged in parallel spaced relation
  • F28D 7/10 - Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits being arranged one within the other, e.g. concentrically
  • F28F 13/08 - Arrangements for modifying heat transfer, e.g. increasing, decreasing by affecting the pattern of flow of the heat-exchange media by varying the cross-section of the flow channels

51.

SEPARATOR APPARATUS

      
Application Number AU2006000257
Publication Number 2006/092006
Status In Force
Filing Date 2006-02-28
Publication Date 2006-09-08
Owner ALCOA OF AUSTRALIA LIMITED (Australia)
Inventor
  • Goh, Kim
  • Brown, Gary, James
  • Hay, Peter, Stewart

Abstract

Abstract A separator apparatus (10) characterised by a fluid inlet (12), a fluid outlet (14), a separated solids outlet (30) and a swirl vane (22), the swirl vane (22) being located down stream of the fluid inlet (12) but upstream of the fluid outlet (14) and separated solids outlet (30), the swirl vane (22) further being arranged so as to impart to the fluid flow passing therethrough a flow such that entrained particles move radially outward due to inertia, the fluid outlet (14) being arranged in-line with the fluid inlet (12) and swirl vane (22) whereas the solids outlet (30) is fed by a radially arranged collector.

IPC Classes  ?

  • B04C 3/06 - Construction of inlets or outlets to the vortex chamber
  • B01D 21/26 - Separation of sediment aided by centrifugal force
  • B01D 45/16 - Separating dispersed particles from gases or vapours by gravity, inertia, or centrifugal forces by centrifugal forces generated by the winding course of the gas stream

52.

METHOD FOR THE CAUSTICISATION OF BAYER PROCESS SOLUTIONS

      
Application Number AU2006000140
Publication Number 2006/081626
Status In Force
Filing Date 2006-02-03
Publication Date 2006-08-10
Owner ALCOA OF AUSTRALIA LIMITED (Australia)
Inventor
  • Roach, Gerald, Dunstan
  • De Witt, Geraldine Charmaine
  • Riley, Geoffrey William

Abstract

A method for the causticisation of a Bayer process solution, the method including the steps of: adding a source of phosphate to the Bayer process solution; adding a causticising agent to the Bayer process solution; and forming a calcium phosphate precipitate, thereby causticising the Bayer process solution.

IPC Classes  ?

  • C01F 7/06 - Preparation of alkali metal aluminates; Aluminium oxide or hydroxide therefrom by treating aluminous minerals or waste-like raw materials with alkali hydroxide, e.g. leaching of bauxite according to the Bayer process

53.

METHOD OF CATALYTIC WET OXIDATION OF ORGANIC CONTAMINANTS OF ALKALINE SOLUTIONS

      
Application Number AU2005001114
Publication Number 2006/010218
Status In Force
Filing Date 2005-07-29
Publication Date 2006-02-02
Owner ALCOA OF AUSTRALIA LIMITED (Australia)
Inventor
  • Baker, Christopher
  • Burnet, Stephen
  • Houghton, Peter
  • Lewi, Catherine
  • Roach, Gerald Dustan

Abstract

A method for the catalytic wet oxidation of organic contaminants of an alkaline solution, the method including the step of exposing the alkaline solution to an oxidising agent and a catalyst, under conditions suitable for the catalytic wet oxidation of organic contaminants, the method characterised in that the alkaline solution is exposed to the oxidising agent and the catalyst while the ratio of the concentration of free caustic in the alkaline solution (expressed in grams per litre equivalent of sodium carbonate) to the concentration of organic contaminants in the alkaline solution (expressed as grams per litre equivalent of carbon) is at least approximately 4.

IPC Classes  ?

  • C01F 7/04 - Preparation of alkali metal aluminates; Aluminium oxide or hydroxide therefrom
  • C01F 7/06 - Preparation of alkali metal aluminates; Aluminium oxide or hydroxide therefrom by treating aluminous minerals or waste-like raw materials with alkali hydroxide, e.g. leaching of bauxite according to the Bayer process

54.

ON-LINE/IN-FIELD BAYER PROCESS LIQUOR ANALYSIS

      
Application Number AU2005001029
Publication Number 2006/007631
Status In Force
Filing Date 2005-07-14
Publication Date 2006-01-26
Owner ALCOA OF AUSTRALIA LIMITED (Australia)
Inventor Dooley, Vincent, Robert

Abstract

A liquor analyser apparatus and method intended for use in real-time or near real-time in-field/on-line analysis of Bayer process liquors to determine the total alumina, total caustic, and total alkali concentrations, and if required, the total concentration of impurities, in the liquor is disclosed. The apparatus and method obviates the need for laboratory analysis, aside of any calibration analysis for initial set-up. The apparatus provides concentrations of alumina, total caustic and total alkali by relying on accurate determination of liquor temperature, density, sound velocity, conductivity and maximum conductivity of the liquor under isothermal dilution. The apparatus is formed around a vessels (11), (13), and (15) with sensors to measure these parameters. The vessels (11), (13), and (15) are fluidly connected in series, with vessel (15) draining to a reservoir (17). A pump (19) is provided to recirculate fluid from the reservoir (17) to the vessels (11), (13), (15) in a closed circuit manner. The vessels (11), (13), (15) and reservoir (17) are contained within a water jacket chamber (21) which is maintained at a suitable constant temperature. The apparatus has a sample inlet (23) and a water inlet (25), and a drain (27). An overflow (29) from the reservoir (17) connects to the drain to discharge fluid during dilution analysis of the fluid. Sample flows are controlled by automatic operation of valves MV1, MV2, MV3, and MV4. Water flow control is controlled via solenoid valves SV1, SV2, SV3, and SV4. Operation is automated by a PLC.

IPC Classes  ?

  • G01N 11/00 - Investigating flow properties of materials, e.g. viscosity or plasticity; Analysing materials by determining flow properties