IPC Classification

Class code (prefix) Descriptions Number of results
B01D 1/00 Evaporating
B01D 1/02 Evaporators with heating coils
B01D 1/04 Evaporators with horizontal tubes
B01D 1/06 Evaporators with vertical tubes
B01D 1/08 Evaporators with vertical tubes with short tubes
B01D 1/10 Evaporators with vertical tubes with long tubes, e.g. Kestner evaporators
B01D 1/12 Evaporators with vertical tubes and forced circulation
B01D 1/14 Evaporating with heated gases or vapours in contact with the liquid
B01D 1/16 Evaporating by spraying
B01D 1/18 Evaporating by spraying to obtain dry solids
B01D 1/20 Sprayers
B01D 1/22 Evaporating by bringing a thin layer of the liquid into contact with a heated surface
B01D 1/24 Evaporating by bringing a thin layer of the liquid into contact with a heated surface to obtain dry solids
B01D 1/26 Multiple-effect evaporating
B01D 1/28 Evaporating with vapour compression
B01D 1/30 Accessories for evaporators
B01D 3/00 Distillation or related exchange processes in which liquids are contacted with gaseous media, e.g. stripping
B01D 3/02 Distillation or related exchange processes in which liquids are contacted with gaseous media, e.g. stripping in boilers or stills
B01D 3/04 Distillation or related exchange processes in which liquids are contacted with gaseous media, e.g. stripping pipe stills
B01D 3/06 Flash distillation
B01D 3/08 Distillation or related exchange processes in which liquids are contacted with gaseous media, e.g. stripping in rotating vessels; Atomisation on rotating discs
B01D 3/10 Vacuum distillation
B01D 3/12 Molecular distillation
B01D 3/14 Fractional distillation
B01D 3/16 Fractionating columns in which vapour bubbles through liquid
B01D 3/18 Fractionating columns in which vapour bubbles through liquid with horizontal bubble plates
B01D 3/20 Bubble caps; Risers for vapour; Discharge pipes for liquid
B01D 3/22 Fractionating columns in which vapour bubbles through liquid with horizontal sieve plates or grids; Construction of sieve plates or grids
B01D 3/24 Fractionating columns in which vapour bubbles through liquid with sloping plates or elements mounted stepwise
B01D 3/26 Fractionating columns in which vapour and liquid flow pass each other, or in which the fluid is sprayed into the vapour, or in which a two-phase mixture is passed in one direction
B01D 3/28 Fractionating columns with surface contact and vertical guides, e.g. film action
B01D 3/30 Fractionating columns with movable parts or in which centrifugal movement is caused
B01D 3/32 Other features of fractionating columns
B01D 3/34 Distillation or related exchange processes in which liquids are contacted with gaseous media, e.g. stripping with one or more auxiliary substances
B01D 3/36 Azeotropic distillation
B01D 3/38 Steam distillation
B01D 3/40 Extractive distillation
B01D 3/42 Regulation; Control
B01D 5/00 Condensation of vapours; Recovering volatile solvents by condensation
B01D 7/00 Sublimation
B01D 7/02 Crystallisation directly from the vapour phase
B01D 8/00 Cold traps; Cold baffles
B01D 9/00 Crystallisation
B01D 9/02 Crystallisation from solutions
B01D 9/04 Crystallisation from solutions concentrating solutions by removing frozen solvent therefrom
B01D 11/00 Solvent extraction
B01D 11/02 Solvent extraction of solids
B01D 11/04 Solvent extraction of solutions which are liquid
B01D 12/00 Displacing liquid, e.g. from wet solids or from dispersions of liquids or from solids in liquids, by means of another liquid
B01D 15/00 Separating processes involving the treatment of liquids with solid sorbents; Apparatus therefor
B01D 15/02 Separating processes involving the treatment of liquids with solid sorbents; Apparatus therefor with moving adsorbents
B01D 15/04 Separating processes involving the treatment of liquids with solid sorbents; Apparatus therefor with ion-exchange materials as adsorbents
B01D 15/08 Selective adsorption, e.g. chromatography
B01D 15/10 Selective adsorption, e.g. chromatography characterised by constructional or operational features
B01D 15/12 Selective adsorption, e.g. chromatography characterised by constructional or operational features relating to the preparation of the feed
B01D 15/14 Selective adsorption, e.g. chromatography characterised by constructional or operational features relating to the introduction of the feed to the apparatus
B01D 15/16 Selective adsorption, e.g. chromatography characterised by constructional or operational features relating to the conditioning of the fluid carrier
B01D 15/18 Selective adsorption, e.g. chromatography characterised by constructional or operational features relating to flow patterns
B01D 15/20 Selective adsorption, e.g. chromatography characterised by constructional or operational features relating to the conditioning of the sorbent material
B01D 15/22 Selective adsorption, e.g. chromatography characterised by constructional or operational features relating to the construction of the column
B01D 15/24 Selective adsorption, e.g. chromatography characterised by constructional or operational features relating to the treatment of the fractions to be distributed
B01D 15/26 Selective adsorption, e.g. chromatography characterised by the separation mechanism
B01D 15/30 Partition chromatography
B01D 15/32 Bonded phase chromatography, e.g. with normal bonded phase, reversed phase or hydrophobic interaction
B01D 15/34 Size-selective separation, e.g. size-exclusion chromatography; Gel filtration; Permeation
B01D 15/36 Selective adsorption, e.g. chromatography characterised by the separation mechanism involving ionic interaction, e.g. ion-exchange, ion-pair, ion-suppression or ion-exclusion
B01D 15/38 Selective adsorption, e.g. chromatography characterised by the separation mechanism involving specific interaction not covered by one or more of groups , e.g. affinity, ligand exchange or chiral chromatography
B01D 15/40 Selective adsorption, e.g. chromatography characterised by the separation mechanism using supercritical fluid as mobile phase or eluent
B01D 15/42 Selective adsorption, e.g. chromatography characterised by the development mode, e.g. by displacement or by elution
B01D 17/00 Separation of liquids, not provided for elsewhere, e.g. by thermal diffusion
B01D 17/02 Separation of non-miscible liquids
B01D 17/04 Breaking emulsions
B01D 17/05 Breaking emulsions by chemical treatment
B01D 17/06 Separation of liquids from each other by electricity
B01D 17/09 Separation of liquids, not provided for elsewhere, e.g. by thermal diffusion by thermal diffusion
B01D 17/12 Auxiliary equipment particularly adapted for use with liquid-separating apparatus, e.g. control circuits
B01D 17/022 Separation of non-miscible liquids by contact with a preferentially wettable solid
B01D 17/025 Separation of non-miscible liquids by gravity, in a settling tank
B01D 17/028 Separation of non-miscible liquids by gravity, in a settling tank provided with a set of baffles
B01D 17/032 Separation of non-miscible liquids by gravity, in a settling tank provided with special equipment for removing at least one of the separated liquids
B01D 17/035 Separation of non-miscible liquids by using gas-bubbles or moving solids introduced into the mixture
B01D 17/038 Separation of non-miscible liquids by centrifugal force
B01D 19/00 Degasification of liquids
B01D 19/02 Foam dispersion or prevention
B01D 19/04 Foam dispersion or prevention by addition of chemical substances
B01D 21/00 Separation of suspended solid particles from liquids by sedimentation
B01D 21/01 Separation of suspended solid particles from liquids by sedimentation using flocculating agents
B01D 21/02 Settling tanks
B01D 21/04 Settling tanks with moving scrapers
B01D 21/06 Settling tanks with moving scrapers with rotating scrapers
B01D 21/08 Settling tanks provided with flocculating compartments
B01D 21/18 Construction of the scrapers or the driving mechanisms for settling tanks
B01D 21/20 Driving mechanisms
B01D 21/22 Safety mechanisms
B01D 21/24 Feed or discharge mechanisms for settling tanks
B01D 21/26 Separation of sediment aided by centrifugal force
B01D 21/28 Mechanical auxiliary equipment for acceleration of sedimentation, e.g. by vibrators or the like
B01D 21/30 Control equipment
B01D 21/32 Density control of clear liquid or sediment, e.g. optical control
B01D 21/34 Controlling the feed distribution; Controlling the liquid level
B01D 24/00 Filters comprising loose filtering material, i.e. filtering material without any binder between the individual particles or fibres thereof
B01D 24/02 Filters comprising loose filtering material, i.e. filtering material without any binder between the individual particles or fibres thereof with the filter bed stationary during the filtration
B01D 24/04 Filters comprising loose filtering material, i.e. filtering material without any binder between the individual particles or fibres thereof with the filter bed stationary during the filtration the filtering material being clamped between pervious fixed walls
B01D 24/06 Filters comprising loose filtering material, i.e. filtering material without any binder between the individual particles or fibres thereof with the filter bed stationary during the filtration the filtering material being clamped between pervious fixed walls the pervious walls comprising a series of louvres or slots
B01D 24/08 Filters comprising loose filtering material, i.e. filtering material without any binder between the individual particles or fibres thereof with the filter bed stationary during the filtration the filtering material being clamped between pervious fixed walls the filtering material being supported by at least two pervious coaxial walls
B01D 24/10 Filters comprising loose filtering material, i.e. filtering material without any binder between the individual particles or fibres thereof with the filter bed stationary during the filtration the filtering material being held in a closed container
B01D 24/12 Downward filtration, the filtering material being supported by pervious surfaces
B01D 24/14 Downward filtration, the container having distribution or collection headers or pervious conduits
B01D 24/16 Upward filtration
B01D 24/18 Combined upward and downward filtration
B01D 24/20 Filters comprising loose filtering material, i.e. filtering material without any binder between the individual particles or fibres thereof with the filter bed stationary during the filtration the filtering material being provided in an open container
B01D 24/22 Downward filtration, the filter material being supported by pervious surfaces
B01D 24/24 Downward filtration, the container having distribution or collection headers or pervious conduits
B01D 24/26 Upward filtration
B01D 24/28 Filters comprising loose filtering material, i.e. filtering material without any binder between the individual particles or fibres thereof with the filter bed moving during the filtration
B01D 24/30 Translation
B01D 24/32 Rotation
B01D 24/34 Filters comprising loose filtering material, i.e. filtering material without any binder between the individual particles or fibres thereof with the filtering material and its pervious support moving
B01D 24/36 Filters comprising loose filtering material, i.e. filtering material without any binder between the individual particles or fibres thereof with the filter bed fluidised during the filtration
B01D 24/38 Feed or discharge devices
B01D 24/40 Feed or discharge devices for feeding
B01D 24/42 Feed or discharge devices for discharging filtrate
B01D 24/44 Feed or discharge devices for discharging filter cake, e.g. chutes
B01D 24/46 Regenerating the filtering material in the filter
B01D 24/48 Filters comprising loose filtering material, i.e. filtering material without any binder between the individual particles or fibres thereof integrally combined with devices for controlling the filtration
B01D 25/00 Filters formed by clamping together several filtering elements or parts of such elements
B01D 25/02 Filters formed by clamping together several filtering elements or parts of such elements in which the elements are pre-formed independent filtering units, e.g. modular systems
B01D 25/12 Filter presses, i.e. of the plate or plate and frame type
B01D 25/19 Clamping means for closing the filter press, e.g. hydraulic jacks
B01D 25/21 Plate and frame presses
B01D 25/22 Cell-type filters
B01D 25/24 Cell-type roll filters
B01D 25/26 Cell-type stack filters
B01D 25/28 Leaching or washing filter cakes in the filter
B01D 25/30 Feeding devices
B01D 25/32 Removal of filter cakes
B01D 25/34 Removal of filter cakes by moving the filter elements
B01D 25/36 Removal of filter cakes by moving the filter elements by centrifugal force
B01D 25/38 Removal of filter cakes by moving parts, e.g. scrapers, contacting stationary filter elements
B01D 25/127 Filter presses, i.e. of the plate or plate and frame type with one or more movable filter bands arranged to be clamped between the press plates or between a plate and a frame during filtration, e.g. zigzag endless filter bands
B01D 25/133 Filter presses, i.e. of the plate or plate and frame type with one or more movable filter bands arranged to be clamped between the press plates or between a plate and a frame during filtration, e.g. zigzag endless filter bands with compression of the filter cake, e.g. by inflatable membranes
B01D 25/164 Chamber-plate presses, i.e. the sides of the filtering elements being clamped between two successive filtering plates
B01D 25/168 Chamber-plate presses, i.e. the sides of the filtering elements being clamped between two successive filtering plates with compression of the filter cake, e.g. by inflatable membranes
B01D 25/172 Plate spreading means
B01D 25/176 Filter presses, i.e. of the plate or plate and frame type attaching the filter element to the filter press plates, e.g. around the central feed hole in the plates
B01D 27/00 Cartridge filters of the throw-away type
B01D 27/02 Cartridge filters of the throw-away type with cartridges made from a mass of loose material
B01D 27/04 Cartridge filters of the throw-away type with cartridges made of a piece of unitary material, e.g. filter paper
B01D 27/06 Cartridge filters of the throw-away type with cartridges made of a piece of unitary material, e.g. filter paper with corrugated, folded or wound material
B01D 27/07 Cartridge filters of the throw-away type with cartridges made of a piece of unitary material, e.g. filter paper with corrugated, folded or wound material having a coaxial stream through the filtering element
B01D 27/08 Construction of the casing
B01D 27/10 Safety devices, e.g. by-passes
B01D 27/14 Cartridge filters of the throw-away type having more than one filtering element
B01D 29/00 Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups ;   Filtering elements therefor
B01D 29/01 Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups ;   Filtering elements therefor with flat filtering elements
B01D 29/03 Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups ;   Filtering elements therefor with flat filtering elements self-supporting
B01D 29/05 Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups ;   Filtering elements therefor with flat filtering elements supported
B01D 29/07 Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups ;   Filtering elements therefor with flat filtering elements supported with corrugated, folded or wound filtering sheets
B01D 29/09 Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups ;   Filtering elements therefor with filtering bands, e.g. movable between filtering operations
B01D 29/11 Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups ;   Filtering elements therefor with bag, cage, hose, tube, sleeve or like filtering elements
B01D 29/13 Supported filter elements
B01D 29/15 Supported filter elements arranged for inward flow filtration
B01D 29/17 Supported filter elements arranged for inward flow filtration open-ended
B01D 29/19 Supported filter elements arranged for inward flow filtration on solid frames with surface grooves or the like
B01D 29/21 Supported filter elements arranged for inward flow filtration with corrugated, folded or wound sheets
B01D 29/23 Supported filter elements arranged for outward flow filtration
B01D 29/25 Supported filter elements arranged for outward flow filtration open-ended
B01D 29/27 Filter bags
B01D 29/31 Self-supporting filtering elements
B01D 29/33 Self-supporting filtering elements arranged for inward flow filtration
B01D 29/35 Self-supporting filtering elements arranged for outward flow filtration
B01D 29/37 Self-supporting filtering elements open-ended
B01D 29/39 Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups ;   Filtering elements therefor with hollow discs side by side on, or around, one or more tubes, e.g. of the leaf type
B01D 29/41 Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups ;   Filtering elements therefor with hollow discs side by side on, or around, one or more tubes, e.g. of the leaf type mounted transversely on the tube
B01D 29/43 Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups ;   Filtering elements therefor with hollow discs side by side on, or around, one or more tubes, e.g. of the leaf type mounted otherwise than transversely on the tube
B01D 29/44 Edge filtering elements, i.e. using contiguous impervious surfaces
B01D 29/46 Edge filtering elements, i.e. using contiguous impervious surfaces of flat, stacked bodies
B01D 29/48 Edge filtering elements, i.e. using contiguous impervious surfaces of spirally or helically wound bodies
B01D 29/50 Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups ;   Filtering elements therefor with multiple filtering elements, characterised by their mutual disposition
B01D 29/52 Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups ;   Filtering elements therefor with multiple filtering elements, characterised by their mutual disposition in parallel connection
B01D 29/54 Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups ;   Filtering elements therefor with multiple filtering elements, characterised by their mutual disposition in parallel connection arranged concentrically or coaxially
B01D 29/56 Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups ;   Filtering elements therefor with multiple filtering elements, characterised by their mutual disposition in series connection
B01D 29/58 Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups ;   Filtering elements therefor with multiple filtering elements, characterised by their mutual disposition in series connection arranged concentrically or coaxially
B01D 29/60 Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups ;   Filtering elements therefor integrally combined with devices for controlling the filtration
B01D 29/62 Regenerating the filter material in the filter
B01D 29/64 Regenerating the filter material in the filter by scrapers, brushes or the like, acting on the cake side of the filtering element
B01D 29/66 Regenerating the filter material in the filter by flushing, e.g. counter-current air-bumps
B01D 29/68 Regenerating the filter material in the filter by flushing, e.g. counter-current air-bumps with backwash arms, shoes or nozzles
B01D 29/70 Regenerating the filter material in the filter by forces created by movement of the filter element
B01D 29/72 Regenerating the filter material in the filter by forces created by movement of the filter element involving vibrations
B01D 29/74 Regenerating the filter material in the filter by forces created by movement of the filter element involving centrifugal force
B01D 29/075 Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups ;   Filtering elements therefor with flat filtering elements located in a closed housing and comprising scrapers or agitators on the cake side of the filtering elements, e.g. Nutsche- or Rosenmund-type filters for performing multiple step operations such as chemical reactions, filtering and cake treatment
B01D 29/76 Handling the filter cake in the filter for purposes other than for regenerating
B01D 29/78 Handling the filter cake in the filter for purposes other than for regenerating for washing
B01D 29/80 Handling the filter cake in the filter for purposes other than for regenerating for drying
B01D 29/82 Handling the filter cake in the filter for purposes other than for regenerating for drying by compression
B01D 29/84 Handling the filter cake in the filter for purposes other than for regenerating for drying by gases or by heating
B01D 29/085 Funnel filters; Holders therefor
B01D 29/86 Retarding cake deposition on the filter during the filtration period, e.g. using stirrers
B01D 29/88 Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups ;   Filtering elements therefor having feed or discharge devices
B01D 29/90 Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups ;   Filtering elements therefor having feed or discharge devices for feeding
B01D 29/92 Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups ;   Filtering elements therefor having feed or discharge devices for discharging filtrate
B01D 29/94 Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups ;   Filtering elements therefor having feed or discharge devices for discharging the filter cake, e.g. chutes
B01D 29/96 Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups ;   Filtering elements therefor in which the filtering elements are moved between filtering operations; Particular measures for removing or replacing the filtering elements; Transport systems for filters
B01D 33/00 Filters with filtering elements which move during the filtering operation
B01D 33/01 Filters with filtering elements which move during the filtering operation with translationally moving filtering elements, e.g. pistons
B01D 33/03 Filters with filtering elements which move during the filtering operation with translationally moving filtering elements, e.g. pistons with vibrating filter elements
B01D 33/04 Filters with filtering elements which move during the filtering operation with filtering bands or the like supported on cylinders which are impervious for filtering
B01D 33/06 Filters with filtering elements which move during the filtering operation with rotary cylindrical filtering surfaces, e.g. hollow drums
B01D 33/09 Filters with filtering elements which move during the filtering operation with rotary cylindrical filtering surfaces, e.g. hollow drums arranged for inward flow filtration with surface cells independently connected to pressure distributors
B01D 33/11 Filters with filtering elements which move during the filtering operation with rotary cylindrical filtering surfaces, e.g. hollow drums arranged for outward flow filtration
B01D 33/13 Filters with filtering elements which move during the filtering operation with rotary cylindrical filtering surfaces, e.g. hollow drums arranged for outward flow filtration with surface cells independently connected to pressure distributors
B01D 33/15 Filters with filtering elements which move during the filtering operation with rotary plane filtering surfaces
B01D 33/17 Filters with filtering elements which move during the filtering operation with rotary plane filtering surfaces with rotary filtering tables
B01D 33/19 Filters with filtering elements which move during the filtering operation with rotary plane filtering surfaces with rotary filtering tables the table surface being divided in successively tilted sectors or cells, e.g. for discharging the filter cake
B01D 33/21 Filters with filtering elements which move during the filtering operation with rotary plane filtering surfaces with hollow filtering discs transversely mounted on a hollow rotary shaft
B01D 33/23 Construction of discs or component sectors thereof
B01D 33/25 Filters with filtering elements which move during the filtering operation with rotary plane filtering surfaces with hollow frames axially mounted on a hollow rotary shaft
B01D 33/27 Filters with filtering elements which move during the filtering operation with rotary filtering surfaces, which are neither cylindrical nor planar, e.g. helical surfaces
B01D 33/29 Filters with filtering elements which move during the filtering operation the movement of the filter elements being a combination of movements
B01D 33/31 Planetary movement
B01D 33/35 Filters with filtering elements which move during the filtering operation with multiple filtering elements characterised by their mutual disposition
B01D 33/37 Filters with filtering elements which move during the filtering operation with multiple filtering elements characterised by their mutual disposition in parallel connection
B01D 33/39 Filters with filtering elements which move during the filtering operation with multiple filtering elements characterised by their mutual disposition in parallel connection concentrically or coaxially
B01D 33/41 Filters with filtering elements which move during the filtering operation with multiple filtering elements characterised by their mutual disposition in series connection
B01D 33/42 Filters with filtering elements which move during the filtering operation with multiple filtering elements characterised by their mutual disposition in series connection concentrically or coaxially
B01D 33/44 Regenerating the filter material in the filter
B01D 33/46 Regenerating the filter material in the filter by scrapers, brushes or the like acting on the cake-side of the filtering element
B01D 33/48 Regenerating the filter material in the filter by flushing, e.g. counter-current air-bumps
B01D 33/50 Regenerating the filter material in the filter by flushing, e.g. counter-current air-bumps with backwash arms, shoes or nozzles
B01D 33/52 Regenerating the filter material in the filter by forces created by movement of the filter element
B01D 33/54 Regenerating the filter material in the filter by forces created by movement of the filter element involving vibrations
B01D 33/56 Regenerating the filter material in the filter by forces created by movement of the filter element involving centrifugal force
B01D 33/58 Handling the filter cake in the filter for purposes other than for regenerating
B01D 33/60 Handling the filter cake in the filter for purposes other than for regenerating for washing
B01D 33/62 Handling the filter cake in the filter for purposes other than for regenerating for drying
B01D 33/64 Handling the filter cake in the filter for purposes other than for regenerating for drying by compression
B01D 33/66 Handling the filter cake in the filter for purposes other than for regenerating for drying by gases or by heating
B01D 33/067 Construction of the filtering drums, e.g. mounting or sealing arrangements
B01D 33/68 Retarding cake deposition on the filter during the filtration period, e.g. using stirrers
B01D 33/70 Filters with filtering elements which move during the filtering operation having feed or discharge devices
B01D 33/72 Filters with filtering elements which move during the filtering operation having feed or discharge devices for feeding
B01D 33/073 Filters with filtering elements which move during the filtering operation with rotary cylindrical filtering surfaces, e.g. hollow drums arranged for inward flow filtration
B01D 33/74 Filters with filtering elements which move during the filtering operation having feed or discharge devices for discharging filtrate
B01D 33/76 Filters with filtering elements which move during the filtering operation having feed or discharge devices for discharging the filter cake, e.g. chutes
B01D 33/80 Accessories
B01D 33/82 Means for pressure distribution
B01D 33/327 Tipping buckets, trays or like sections
B01D 33/333 Filters with filtering elements which move during the filtering operation with individual filtering elements moving along a closed path
B01D 35/00 Filtering devices having features not specifically covered by groups , or for applications not specifically covered by groups ; Auxiliary devices for filtration; Filter housing constructions
B01D 35/01 Devices for the removal of gas, e.g. air purge systems
B01D 35/02 Filters adapted for location in special places, e.g. pipe-lines, pumps, stop-cocks
B01D 35/04 Plug, tap, or cock filters
B01D 35/05 Floating filters
B01D 35/06 Filters making use of electricity or magnetism
B01D 35/10 Brush filters
B01D 35/12 Devices for taking out of action one or more units of multi-unit filters, e.g. for regeneration
B01D 35/14 Safety devices specially adapted for filtration; Devices for indicating clogging
B01D 35/15 Bidirectional working filters
B01D 35/16 Cleaning-out devices
B01D 35/18 Heating or cooling the filters
B01D 35/20 Vibrating the filters
B01D 35/22 Directing the mixture to be filtered on to the filters in a manner to clean the filters
B01D 35/24 Providing loose granular material to scratch the filters clean
B01D 35/26 Filters with built-in pumps
B01D 35/027 Filters adapted for location in special places, e.g. pipe-lines, pumps, stop-cocks rigidly mounted in or on tanks or reservoirs
B01D 35/28 Strainers not provided for elsewhere
B01D 35/30 Filter housing constructions
B01D 35/31 Filter housing constructions including arrangements for environmental protection, e.g. pressure resisting features
B01D 35/32 Filter housing constructions including arrangements for environmental protection, e.g. pressure resisting features against radiation
B01D 35/34 Filter housing constructions open-topped
B01D 35/143 Filter condition indicators
B01D 35/147 Bypass or safety valves
B01D 35/153 Anti-leakage or anti-return valves
B01D 35/157 Flow control valves; Damping or calibrated passages
B01D 36/00 Filter circuits or combinations of filters with other separating devices
B01D 36/02 Combinations of filters of different kinds
B01D 36/04 Combinations of filters with settling tanks
B01D 37/00 Processes of filtration
B01D 37/02 Precoating the filtering elements or material; Addition of filter aids to the liquid being filtered
B01D 37/03 Processes of filtration using flocculating agents
B01D 37/04 Controlling the filtration
B01D 39/00 Filtering material for liquid or gaseous fluids
B01D 39/02 Loose filtering material, e.g. loose fibres
B01D 39/04 Organic material, e.g. cellulose, cotton
B01D 39/06 Inorganic material, e.g. asbestos fibres, glass beads or fibres
B01D 39/08 Filter cloth, i.e. woven, knitted or interlaced material
B01D 39/10 Filter screens essentially made of metal
B01D 39/12 Filter screens essentially made of metal of expanded metal
B01D 39/14 Other self-supporting filtering material
B01D 39/16 Other self-supporting filtering material of organic material, e.g. synthetic fibres
B01D 39/18 Other self-supporting filtering material of organic material, e.g. synthetic fibres the material being cellulose or derivatives thereof
B01D 39/20 Other self-supporting filtering material of inorganic material, e.g. asbestos paper or metallic filtering material of non-woven wires
B01D 41/00 Regeneration of the filtering material or filter elements outside the filter for liquid or gaseous fluids
B01D 41/02 Regeneration of the filtering material or filter elements outside the filter for liquid or gaseous fluids of loose filtering material
B01D 41/04 Regeneration of the filtering material or filter elements outside the filter for liquid or gaseous fluids of rigid self-supporting filtering material
B01D 43/00 Separating particles from liquids, or liquids from solids, otherwise than by sedimentation or filtration
B01D 45/00 Separating dispersed particles from gases or vapours by gravity, inertia, or centrifugal forces
B01D 45/02 Separating dispersed particles from gases or vapours by gravity, inertia, or centrifugal forces by utilising gravity
B01D 45/04 Separating dispersed particles from gases or vapours by gravity, inertia, or centrifugal forces by utilising inertia
B01D 45/06 Separating dispersed particles from gases or vapours by gravity, inertia, or centrifugal forces by utilising inertia by reversal of direction of flow
B01D 45/08 Separating dispersed particles from gases or vapours by gravity, inertia, or centrifugal forces by utilising inertia by impingement against baffle separators
B01D 45/10 Separating dispersed particles from gases or vapours by gravity, inertia, or centrifugal forces by utilising inertia by impingement against baffle separators which are wetted
B01D 45/12 Separating dispersed particles from gases or vapours by gravity, inertia, or centrifugal forces by centrifugal forces
B01D 45/14 Separating dispersed particles from gases or vapours by gravity, inertia, or centrifugal forces by centrifugal forces generated by rotating vanes, discs, drums or brushes
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
B01D 45/18 Cleaning-out devices
B01D 46/00 Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
B01D 46/02 Particle separators, e.g. dust precipitators, having hollow filters made of flexible material
B01D 46/04 Cleaning filters
B01D 46/06 Particle separators, e.g. dust precipitators, having hollow filters made of flexible material with means keeping the working surfaces flat
B01D 46/08 Particle separators, e.g. dust precipitators, having hollow filters made of flexible material with means keeping the working surfaces flat the working surfaces forming a star shape
B01D 46/10 Particle separators, e.g. dust precipitators, using filter plates, sheets or pads having plane surfaces
B01D 46/12 Particle separators, e.g. dust precipitators, using filter plates, sheets or pads having plane surfaces in multiple arrangements
B01D 46/14 Particle separators, e.g. dust precipitators, using filter plates, sheets or pads having plane surfaces arranged in a star shape
B01D 46/16 Particle separators, e.g. dust precipitators, using filter plates, sheets or pads having plane surfaces arranged on non-filtering conveyors
B01D 46/18 Particle separators, e.g. dust precipitators, using filtering belts
B01D 46/20 Particle separators, e.g. dust precipitators, using filtering belts the belts combined with drums
B01D 46/22 Particle separators, e.g. dust precipitators, using filtering belts the belts travelling during filtering
B01D 46/24 Particle separators, e.g. dust precipitators, using rigid hollow filter bodies
B01D 46/26 Particle separators, e.g. dust precipitators, using rigid hollow filter bodies rotatable
B01D 46/28 Particle separators, e.g. dust precipitators, using filter brushes
B01D 46/30 Particle separators, e.g. dust precipitators, using loose filtering material
B01D 46/32 Particle separators, e.g. dust precipitators, using loose filtering material the material moving during filtering
B01D 46/34 Particle separators, e.g. dust precipitators, using loose filtering material the material moving during filtering not horizontally, e.g. using shoots
B01D 46/36 Particle separators, e.g. dust precipitators, using loose filtering material the material moving during filtering as a substantially horizontal layer, e.g. on rotary tables, drums or conveyor belts
B01D 46/38 Particle separators, e.g. dust precipitators, using loose filtering material the material moving during filtering as fluidised bed
B01D 46/40 Particle separators, e.g. dust precipitators, using edge filters, i.e. using contiguous impervious surfaces
B01D 46/42 Auxiliary equipment or operation thereof
B01D 46/44 Auxiliary equipment or operation thereof controlling filtration
B01D 46/46 Auxiliary equipment or operation thereof controlling filtration automatic
B01D 46/48 Removing dust other than cleaning filters
B01D 46/50 Means for discharging electrostatic potential
B01D 46/52 Particle separators, e.g. dust precipitators, using filters embodying folded material
B01D 46/54 Particle separators, e.g. dust precipitators, using ultra-fine filter sheets or diaphragms
B01D 46/56 Filters or filtering processes specially modified for separating dispersed particles from gases or vapours with multiple filtering elements, characterised by their mutual disposition
B01D 46/58 Filters or filtering processes specially modified for separating dispersed particles from gases or vapours with multiple filtering elements, characterised by their mutual disposition connected in parallel
B01D 46/60 Filters or filtering processes specially modified for separating dispersed particles from gases or vapours with multiple filtering elements, characterised by their mutual disposition connected in parallel arranged concentrically or coaxially
B01D 46/62 Filters or filtering processes specially modified for separating dispersed particles from gases or vapours with multiple filtering elements, characterised by their mutual disposition connected in series
B01D 46/64 Filters or filtering processes specially modified for separating dispersed particles from gases or vapours with multiple filtering elements, characterised by their mutual disposition connected in series arranged concentrically or coaxially
B01D 46/66 Regeneration of the filtering material or filter elements inside the filter
B01D 46/68 Regeneration of the filtering material or filter elements inside the filter by means acting on the cake side involving movement with regard to the filter elements
B01D 46/69 Regeneration of the filtering material or filter elements inside the filter by means acting on the cake side without movement with respect to the filter elements, e.g. fixed nozzles
B01D 46/70 Regeneration of the filtering material or filter elements inside the filter by acting counter-currently on the filtering surface, e.g. by flushing on the non-cake side of the filter
B01D 46/71 Regeneration of the filtering material or filter elements inside the filter by acting counter-currently on the filtering surface, e.g. by flushing on the non-cake side of the filter with pressurised gas, e.g. pulsed air
B01D 46/72 Regeneration of the filtering material or filter elements inside the filter by acting counter-currently on the filtering surface, e.g. by flushing on the non-cake side of the filter with backwash arms, shoes or nozzles
B01D 46/74 Regeneration of the filtering material or filter elements inside the filter by forces created by movement of the filter element
B01D 46/76 Regeneration of the filtering material or filter elements inside the filter by forces created by movement of the filter element involving vibrations
B01D 46/78 Regeneration of the filtering material or filter elements inside the filter by forces created by movement of the filter element involving centrifugal forces
B01D 46/79 Regeneration of the filtering material or filter elements inside the filter by liquid process
B01D 46/80 Chemical processes for the removal of the retained particles, e.g. by burning
B01D 46/82 Chemical processes for the removal of the retained particles, e.g. by burning with catalysts
B01D 46/84 Chemical processes for the removal of the retained particles, e.g. by burning by heating only
B01D 46/86 Cleaning the filter surface by interrupting suction so that the filter cake falls by gravity
B01D 46/88 Replacing filter elements
B01D 46/90 Devices for taking out of action one or more units of multi-unit filters, e.g. for regeneration or maintenance
B01D 46/121 V-type arrangements
B01D 46/681 Regeneration of the filtering material or filter elements inside the filter by means acting on the cake side involving movement with regard to the filter elements by scrapers, brushes or the like
B01D 46/682 Regeneration of the filtering material or filter elements inside the filter by means acting on the cake side involving movement with regard to the filter elements by nozzles
B01D 46/762 Regeneration of the filtering material or filter elements inside the filter by forces created by movement of the filter element involving vibrations involving sonic or ultrasonic waves
B01D 47/00 Separating dispersed particles from gases, air or vapours by liquid as separating agent
B01D 47/02 Separating dispersed particles from gases, air or vapours by liquid as separating agent by passing the gas or air or vapour over or through a liquid bath
B01D 47/04 Separating dispersed particles from gases, air or vapours by liquid as separating agent by passing the gas or air or vapour through foam
B01D 47/05 Separating dispersed particles from gases, air or vapours by liquid as separating agent by condensation of the separating agent
B01D 47/06 Spray cleaning
B01D 47/08 Spray cleaning with rotary nozzles
B01D 47/10 Venturi scrubbers
B01D 47/12 Washers with plural different washing sections
B01D 47/14 Packed scrubbers
B01D 47/16 Apparatus having rotary means, other than rotatable nozzles, for atomising the cleaning liquid
B01D 47/18 Apparatus having rotary means, other than rotatable nozzles, for atomising the cleaning liquid with horizontally-arranged shafts
B01D 49/00 Separating dispersed particles from gases, air or vapours by other methods
B01D 49/02 Separating dispersed particles from gases, air or vapours by other methods by thermal repulsion
B01D 50/00 Combinations of methods or devices for separating particles from gases or vapours
B01D 50/10 Combinations of devices covered by groups , and
B01D 50/20 Combinations of devices covered by groups and
B01D 50/40 Combinations of devices covered by groups and
B01D 50/60 Combinations of devices covered by groups and
B01D 51/00 Auxiliary pretreatment of gases or vapours to be cleaned from dispersed particles
B01D 51/02 Amassing the particles, e.g. by flocculation
B01D 51/04 Amassing the particles, e.g. by flocculation by seeding, e.g. by adding particles
B01D 51/06 Amassing the particles, e.g. by flocculation by varying the pressure of the gas or vapour
B01D 51/08 Amassing the particles, e.g. by flocculation by varying the pressure of the gas or vapour by sound or ultrasonics
B01D 51/10 Conditioning the gas to be cleaned
B01D 53/00 Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases or aerosols
B01D 53/02 Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases or aerosols by adsorption, e.g. preparative gas chromatography
B01D 53/04 Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases or aerosols by adsorption, e.g. preparative gas chromatography with stationary adsorbents
B01D 53/06 Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases or aerosols by adsorption, e.g. preparative gas chromatography with moving adsorbents
B01D 53/08 Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases or aerosols by adsorption, e.g. preparative gas chromatography with moving adsorbents according to the "moving bed" method
B01D 53/10 Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases or aerosols by adsorption, e.g. preparative gas chromatography with moving adsorbents with dispersed adsorbents
B01D 53/12 Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases or aerosols by adsorption, e.g. preparative gas chromatography with moving adsorbents with dispersed adsorbents according to the "fluidised technique"
B01D 53/14 Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases or aerosols by absorption
B01D 53/18 Absorbing units; Liquid distributors therefor
B01D 53/22 Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases or aerosols by diffusion
B01D 53/24 Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases or aerosols by centrifugal force
B01D 53/26 Drying gases or vapours
B01D 53/28 Selection of materials for use as drying agents
B01D 53/30 Controlling by gas-analysis apparatus
B01D 53/32 Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases or aerosols by electrical effects other than those provided for in group
B01D 53/34 Chemical or biological purification of waste gases
B01D 53/38 Removing components of undefined structure
B01D 53/40 Acidic components
B01D 53/42 Basic components
B01D 53/44 Organic components
B01D 53/46 Removing components of defined structure
B01D 53/047 Pressure swing adsorption
B01D 53/48 Sulfur compounds
B01D 53/50 Sulfur oxides
B01D 53/52 Hydrogen sulfide
B01D 53/053 Pressure swing adsorption with storage or buffer vessel
B01D 53/54 Nitrogen compounds
B01D 53/56 Nitrogen oxides
B01D 53/58 Ammonia
B01D 53/60 Simultaneously removing sulfur oxides and nitrogen oxides
B01D 53/62 Carbon oxides
B01D 53/64 Heavy metals or compounds thereof, e.g. mercury
B01D 53/66 Ozone
B01D 53/68 Halogens or halogen compounds
B01D 53/70 Organic halogen compounds
B01D 53/72 Organic compounds not provided for in groups , e.g. hydrocarbons
B01D 53/73 After-treatment of removed components
B01D 53/74 General processes for purification of waste gases; Apparatus or devices specially adapted therefor
B01D 53/75 Multi-step processes
B01D 53/76 Gas phase processes, e.g. by using aerosols
B01D 53/77 Liquid phase processes
B01D 53/78 Liquid phase processes with gas-liquid contact
B01D 53/79 Injecting reactants
B01D 53/80 Semi-solid phase processes, i.e. by using slurries
B01D 53/81 Solid phase processes
B01D 53/82 Solid phase processes with stationary reactants
B01D 53/83 Solid phase processes with moving reactants
B01D 53/84 Biological processes
B01D 53/85 Biological processes with gas-solid contact
B01D 53/86 Catalytic processes
B01D 53/88 Handling or mounting catalysts
B01D 53/90 Injecting reactants
B01D 53/92 Chemical or biological purification of waste gases of engine exhaust gases
B01D 53/94 Chemical or biological purification of waste gases of engine exhaust gases by catalytic processes
B01D 53/96 Regeneration, reactivation or recycling of reactants
B01D 57/00 Separation, other than separation of solids, not fully covered by a single other group or subclass, e.g.
B01D 57/02 Separation, other than separation of solids, not fully covered by a single other group or subclass, e.g. by electrophoresis
B01D 59/00 Separation of different isotopes of the same chemical element
B01D 59/02 Separation by phase transition
B01D 59/04 Separation by phase transition by distillation
B01D 59/06 Separation by phase transition by zone melting
B01D 59/08 Separation by phase transition by fractional crystallisation, by precipitation, by zone freezing
B01D 59/10 Separation by diffusion
B01D 59/12 Separation by diffusion by diffusion through barriers
B01D 59/14 Construction of the barrier
B01D 59/16 Separation by diffusion by thermal diffusion
B01D 59/18 Separation by diffusion by separation jets
B01D 59/20 Separation by centrifuging
B01D 59/22 Separation by extracting
B01D 59/24 Separation by extracting by solvent extraction
B01D 59/26 Separation by extracting by sorption, i.e. absorption, adsorption, persorption
B01D 59/28 Separation by chemical exchange
B01D 59/30 Separation by chemical exchange by ion exchange
B01D 59/32 Separation by chemical exchange by exchange between fluids
B01D 59/33 Separation by chemical exchange by exchange between fluids involving dual temperature exchange
B01D 59/34 Separation by photochemical methods
B01D 59/36 Separation by biological methods
B01D 59/38 Separation by electrochemical methods
B01D 59/40 Separation by electrochemical methods by electrolysis
B01D 59/42 Separation by electrochemical methods by electrophoresis
B01D 59/44 Separation by mass spectrography
B01D 59/46 Separation by mass spectrography using only electrostatic fields
B01D 59/48 Separation by mass spectrography using electrostatic and magnetic fields
B01D 59/50 Separation involving two or more processes covered by different groups selected from groups , , , , , , , ,
B01D 61/00 Processes of separation using semi-permeable membranes, e.g. dialysis, osmosis or ultrafiltration; Apparatus, accessories or auxiliary operations specially adapted therefor
B01D 61/02 Reverse osmosis; Hyperfiltration
B01D 61/04 Feed pretreatment
B01D 61/06 Energy recovery
B01D 61/08 Apparatus therefor
B01D 61/10 Accessories; Auxiliary operations
B01D 61/12 Controlling or regulating
B01D 61/14 Ultrafiltration; Microfiltration
B01D 61/16 Feed pretreatment
B01D 61/18 Apparatus therefor
B01D 61/20 Accessories; Auxiliary operations
B01D 61/22 Controlling or regulating
B01D 61/24 Dialysis
B01D 61/26 Dialysate solution flow, e.g. preparation, regeneration
B01D 61/28 Apparatus therefor
B01D 61/30 Accessories; Auxiliary operation
B01D 61/32 Controlling or regulating
B01D 61/34 Measuring ultrafiltrate during dialysis
B01D 61/36 Pervaporation; Membrane distillation; Liquid permeation
B01D 61/38 Liquid-membrane separation
B01D 61/40 Liquid-membrane separation using emulsion-type membranes
B01D 61/42 Electrodialysis; Electro-osmosis
B01D 61/44 Ion-selective electrodialysis
B01D 61/46 Apparatus therefor
B01D 61/48 Apparatus therefor having one or more compartments filled with ion-exchange material
B01D 61/50 Stacks of the plate-and-frame type
B01D 61/52 Accessories; Auxiliary operation
B01D 61/54 Controlling or regulating
B01D 61/56 Electro-osmotic dewatering
B01D 61/58 Multistep processes
B01D 63/00 Apparatus in general for separation processes using semi-permeable membranes
B01D 63/02 Hollow fibre modules
B01D 63/04 Hollow fibre modules comprising multiple hollow fibre assemblies
B01D 63/06 Tubular membrane modules
B01D 63/08 Flat membrane modules
B01D 63/10 Spiral-wound membrane modules
B01D 63/12 Spiral-wound membrane modules comprising multiple spiral-wound assemblies
B01D 63/14 Pleat-type membrane modules
B01D 63/16 Rotary, reciprocated or vibrated modules
B01D 65/00 Accessories or auxiliary operations, in general, for separation processes or apparatus using semi-permeable membranes
B01D 65/02 Membrane cleaning or sterilisation
B01D 65/04 Membrane cleaning or sterilisation with movable bodies, e.g. foam balls
B01D 65/06 Membrane cleaning or sterilisation with special washing compositions
B01D 65/08 Prevention of membrane fouling or of concentration polarisation
B01D 65/10 Testing of membranes or membrane apparatus; Detecting or repairing leaks
B01D 67/00 Processes specially adapted for manufacturing semi-permeable membranes for separation processes or apparatus
B01D 69/00 Semi-permeable membranes for separation processes or apparatus characterised by their form, structure or properties; Manufacturing processes specially adapted therefor
B01D 69/02 Semi-permeable membranes for separation processes or apparatus characterised by their form, structure or properties; Manufacturing processes specially adapted therefor characterised by their properties
B01D 69/04 Tubular membranes
B01D 69/06 Flat membranes
B01D 69/08 Hollow fibre membranes
B01D 69/10 Supported membranes; Membrane supports
B01D 69/12 Composite membranes; Ultra-thin membranes
B01D 69/14 Dynamic membranes
B01D 71/00 Semi-permeable membranes for separation processes or apparatus characterised by the material; Manufacturing processes specially adapted therefor
B01D 71/02 Inorganic material
B01D 71/04 Glass
B01D 71/06 Organic material
B01D 71/08 Polysaccharides
B01D 71/10 Cellulose; Modified cellulose
B01D 71/12 Cellulose derivatives
B01D 71/14 Esters of organic acids
B01D 71/16 Cellulose acetate
B01D 71/18 Mixed esters, e.g. cellulose acetate-butyrate
B01D 71/20 Esters of inorganic acids, e.g. cellulose nitrate
B01D 71/22 Cellulose ethers
B01D 71/24 Rubbers
B01D 71/26 Polyalkenes
B01D 71/28 Polymers of vinyl aromatic compounds
B01D 71/30 Polyalkenyl halides
B01D 71/32 Polyalkenyl halides containing fluorine atoms
B01D 71/34 Polyvinylidene fluoride
B01D 71/36 Polytetrafluoroethene
B01D 71/38 Polyalkenylalcohols; Polyalkenylesters; Polyalkenylethers; Polyalkenylaldehydes; Polyalkenylketones; Polyalkenylacetals; Polyalkenylketals
B01D 71/40 Polymers of unsaturated acids or derivatives thereof, e.g. salts, amides, imides, nitriles, anhydrides, esters
B01D 71/42 Polymers of nitriles, e.g. polyacrylonitrile
B01D 71/44 Polymers obtained by reactions only involving carbon-to-carbon unsaturated bonds, not provided for in a single one of groups
B01D 71/46 Epoxy resins
B01D 71/48 Polyesters
B01D 71/50 Polycarbonates
B01D 71/52 Polyethers
B01D 71/54 Polyureas; Polyurethanes
B01D 71/56 Polyamides, e.g. polyester-amides
B01D 71/58 Other polymers having nitrogen in the main chain, with or without oxygen or carbon only
B01D 71/60 Polyamines
B01D 71/62 Polycondensates having nitrogen-containing heterocyclic rings in the main chain
B01D 71/64 Polyimides; Polyamide-imides; Polyester-imides; Polyamide acids or similar polyimide precursors
B01D 71/66 Polymers having sulfur in the main chain, with or without nitrogen, oxygen or carbon only
B01D 71/68 Polysulfones; Polyethersulfones
B01D 71/70 Polymers having silicon in the main chain, with or without sulfur, nitrogen, oxygen or carbon only
B01D 71/72 Macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds, not provided for in a single one of groups
B01D 71/74 Natural macromolecular material or derivatives thereof
B01D 71/76 Macromolecular material not specifically provided for in a single one of groups
B01D 71/78 Graft polymers
B01D 71/80 Block polymers
B01D 71/82 Macromolecular material not specifically provided for in a single one of groups characterised by the presence of specified groups, e.g. introduced by chemical after-treatment