Abrégé

A process of producing lactide from lactic acid comprises the steps of: a) feeding lactic acid, a hydrocarbon solvent and at least one catalyst into a reactor of a reactor system so as to form a reaction mixture in the reactor, b) reacting the reaction mixture in the so that at least a part of the lactic acid is converted to lactide and water, while distilling at least a part of the reaction mixture so as to remove an azeotrope of water and the hydrocarbon solvent from the reactor, c) separating at least a part of the water from the azeotrope removed from the reactor in step b), d) separating at least a part of the lactide from the reaction mixture, wherein the at least one catalyst comprises a homogeneous catalyst comprising an organometallic compound selected from the group consisting of tin alkoxides, zinc alkoxides, aluminum alkoxides, titanium alkoxides, tin carboxylates, zinc carboxylates, aluminum carboxylates, titanium carboxylates and arbitrary mixtures of two or more of these compounds.

Classes IPC  ?

• C07D 319/12 - Dioxanes-1, 4; Dioxanes-1, 4 hydrogénés non condensés avec d'autres cycles

Abrégé

The present invention relates to a method for preparing a purified styrene composition, wherein the method comprises the following steps: a) providing a crude hydrocarbon composition containing styrene, b) subjecting the crude hydrocarbon composition provided in step a) to a distillation in a divided-wall column so as to produce an overhead hydrocarbon stream, a bottom hydrocarbon stream and a side hydrocarbon stream and c) subjecting the side hydrocarbon stream obtained in step b) to at least one crystallization step so as to obtain a purified styrene composition.

Classes IPC  ?

• C07C 7/04 - Purification, séparation ou stabilisation d'hydrocarbures; Emploi d'additifs par distillation
• C07C 7/14 - Purification, séparation ou stabilisation d'hydrocarbures; Emploi d'additifs par cristallisation; Purification ou séparation des cristaux
• C07C 15/46 - Styrène; Styrènes alkylés sur le cycle
• C10G 67/02 - Traitement des huiles d'hydrocarbures, uniquement par au moins un procédé d'hydrotraitement et au moins un procédé de raffinage en l'absence d'hydrogène uniquement par plusieurs étapes en série

Abrégé

The present invention relates to a method for preparing a purified styrene composition, wherein the method comprises providing a crude composition containing 70% by weight or more styrene based on the total weight of the crude composition and subjecting the crude composition to at least one crystallization step, wherein the at least one crystallization step comprises at least one of a static crystallization stage and a dynamic crystallization stage, and wherein the crude composition contains one or more impurities selected from the group consisting color inducing species, oxygenates, sulfur species, alpha-methylstyrene and arbitrary combinations of two or more thereof.

Classes IPC  ?

• C07C 15/46 - Styrène; Styrènes alkylés sur le cycle
• C07C 7/14 - Purification, séparation ou stabilisation d'hydrocarbures; Emploi d'additifs par cristallisation; Purification ou séparation des cristaux

Abrégé

The present invention relates to a method for preparing a purified styrene composition with a styrene yield of at least 80%, wherein the method comprises providing a crude composition containing styrene and subjecting the crude composition to at least one crystallization step, wherein the at least one crystallization step comprises at least one static crystallization stage and at least one dynamic crystallization stage.

Classes IPC  ?

• C07C 15/46 - Styrène; Styrènes alkylés sur le cycle
• C07C 7/14 - Purification, séparation ou stabilisation d'hydrocarbures; Emploi d'additifs par cristallisation; Purification ou séparation des cristaux

Abrégé

A process for treating waste fluid generated during a petrochemical process, wherein the waste fluid comprises at least one first water-based wastewater stream and at least one second organic fluid-based waste fluid stream, wherein the process comprises the following steps: a) subjecting the at least one first water-based wastewater stream to at least one freeze concentration stage so as to produce a third clean water stream and a fourth concentrated water-based wastewater stream, b) subjecting the at least one second organic fluid-based waste fluid stream to at least one separation stage so as to produce a fifth purified product stream and a sixth concentrated organic fluid-based waste fluid stream, c) forwarding the fourth concentrated water-based wastewater stream and the sixth concentrated organic fluid-based waste fluid stream to an incinerator and incinerating the streams in the incinerator, wherein the process is controlled so that the incineration of the sixth concentrated organic fluid-based waste fluid stream generates at least 70% of the energy necessary to incinerate the fourth concentrated water-based wastewater stream.

Classes IPC  ?

• C02F 9/00 - Traitement en plusieurs étapes de l'eau, des eaux résiduaires ou des eaux d'égout
• C02F 1/00 - Traitement de l'eau, des eaux résiduaires ou des eaux d'égout
• C02F 1/02 - Traitement de l'eau, des eaux résiduaires ou des eaux d'égout par chauffage
• C02F 1/22 - Traitement de l'eau, des eaux résiduaires ou des eaux d'égout par congélation
• C02F 1/26 - Traitement de l'eau, des eaux résiduaires ou des eaux d'égout par extraction
• C02F 1/72 - Traitement de l'eau, des eaux résiduaires ou des eaux d'égout par oxydation
• C02F 11/06 - Traitement des boues d'égout; Dispositifs à cet effet par oxydation

Abrégé

The present invention relates to a structured cross-channel packing element for a column for mass transfer and/or heat exchange between a heavy and a light fluid phase, wherein the structured cross-channel packing element comprises at least two adjacent layers made of expanded metal sheets each comprising openings, which are surrounded and separated from each other by separating elements, wherein at least two of the at least two layers are arranged in the longitudinal direction of the packing element parallel and in touching contact with each other so that an open space extending from one end to the opposite end of the at least two layers is provided between them so that at least one of the heavy and the light fluid phase may flow through it, wherein the ratio between the average width of at least 50% of the separating elements between adjacent openings and the sheet material thickness is at least 15, wherein the ratio between the maximum distance between at least two of the at least two layers measured in the plane being perpendicular of the longitudinal direction and the average width of the separating elements is at least 4, and wherein the ratio between the distance between two openings being in the direction perpendicular to the stretch direction of the expanded metal sheet adjacent to a separating element and the average width of this separating element is for at least 50% of all separating elements 4 to 6.

Classes IPC  ?

• B01J 19/32 - Eléments de remplissage en forme de grille ou d'éléments composés de plusieurs pièces pour constituer une unité ou un module dans l'appareil de transfert de chaleur ou de matière

Abrégé

The present invention relates to a structured packing element for a column for mass transfer and/or heat exchange between a heavy and a light fluid phase, wherein the structured packing element comprises at least two layers of a grid comprising openings, which are surrounded and separated from each other by separating elements, wherein at least two of the at least two layers are arranged in the longitudinal direction parallel and in touching contact with each other so that an open space extending from one end to the opposite end of the at least two layers is provided between them so that at least one of the heavy and the light fluid phase may flow through it, wherein the average width of at least 50% of the separating elements between adjacent openings is at least 15 times the layer material thickness and is between 70% and 125% of the average hydraulic diameter of the adjacent openings, and wherein the maximum distance between at least two of the at least two layers measured in the plane being perpendicular of the longitudinal direction is at least 4 times larger than the average width of the separating elements.

Classes IPC  ?

• B01J 19/32 - Eléments de remplissage en forme de grille ou d'éléments composés de plusieurs pièces pour constituer une unité ou un module dans l'appareil de transfert de chaleur ou de matière

Abrégé

A system and method for producing high-purity hexane that uses a deisohexanizer with a dividing wall within the separation section following the isomerization reactor section of an isomerization unit deisohexanizer column with a dividing wall. Light isomerate (mainly i-C5) and heavy isomerate (mainly i-C6) are also products of the isomerization unit. The dividing wall column merges operation of two conventional distillation columns into a single column leading to substantial cost savings. The dividing wall for this particular application can be located either in the top, bottom, or middle section of the column. Using a top, bottom, or middle dividing wall column for this application has significant advantages over conventional distillation columns. The hexane, produced as a byproduct from the isomerization unit is of a much superior quality to that produced by a solvent extraction process, which is the conventional process for producing hexane. The operating cost for the production of hexane from an isomerization unit is significantly reduced compared to the cost of hexane produced by solvent extraction processes.

Classes IPC  ?

• C10G 67/02 - Traitement des huiles d'hydrocarbures, uniquement par au moins un procédé d'hydrotraitement et au moins un procédé de raffinage en l'absence d'hydrogène uniquement par plusieurs étapes en série
• B01D 3/14 - Distillation fractionnée
• C07C 7/09 - Purification, séparation ou stabilisation d'hydrocarbures; Emploi d'additifs par condensation fractionnée

Abrégé

A process fluid lubricated pump is proposed, having a common housing (2), a pump unit (3) arranged in the common housing, and a drive unit (4) arranged in the common housing (2), wherein the common housing (2) comprises a low pressure inlet (21) and a high pressure outlet (22) for the process fluid. The pump unit (3) comprises a pump shaft (5) extending from a drive end (51) to a non-drive end (52) of the pump shaft (5), and a first pump section (31) having a first set of impellers (311) fixedly mounted on the pump shaft (5). The drive unit (4) is configured for driving the rotation of the pump shaft (5). A first balance drum (7) is fixedly connected to the pump shaft (5) between the pump unit (3) and the drive end (51) and defining a first front side (71) facing the pump unit (3) and a first back side (72). A first relief passage (73) is provided between the first balance drum (7) and a first stationary part (26), the first relief passage (73) extending from the first front side (71) to the first back side (72). A second balance drum (8) is fixedly connected to the pump shaft (5) between the pump unit (3) and the non-drive end (52), the second balance drum (8) defining a second front side (81) facing the pump unit (3) and a second back side (82). A second relief passage (83) is provided between the second balance drum (8) and a second stationary part (27), the second relief passage (83) extending from the second front side (81) to the second back side (82). A balance line (9) is provided connecting the first back side (72) and the second back side (82).

Classes IPC  ?

• F04D 29/58 - Refroidissement; Chauffage; Réduction du transfert de chaleur
• F04D 1/06 - Pompes multiétagées
• F04D 13/10 - Ensembles comprenant les pompes et leurs moyens d'entraînement la pompe étant entraînée par l'électricité pour utilisation en position immergée adaptés pour l'utilisation dans les forages de mine
• F04D 29/041 - Equilibrage des poussées axiales
• F04D 29/06 - Lubrification

Abrégé

A multiphase pump is proposed for conveying a multiphase process fluid a low pressure side (LP) to a high pressure side (HP), comprising an outer housing and a casing (10), the casing (10) having a pump inlet (2) and a pump outlet (3) for the process fluid, the multiphase pump (1)further comprising a pump rotor (4) for rotating about an axial direction (A) arranged within the casing (1), with the pump rotor (4) being designed for conveying the process fluid from the pump inlet (2) to the pump outlet (3). The multiphase pump is characterized in that the casing comprises a plurality of stage segments (51, 52, 71, 72, 73), and the plurality of stage segments (51, 52, 71, 72, 73) comprise an individual stage-segment (71, 72, 73), a low pressure segment (51) arranged at the pump inlet (2) and a high pressure segment (52) arranged at the pump outlet (3), wherein the individual stage-segment (71, 72, 73) is arranged between the high pressure segment (52) and the low pressure segment (51), and the stage segments (51, 52, 71, 72, 73) are held together by a sealing support structure (81, 82), the casing (10) being arranged within the outer housing.

Classes IPC  ?

• F04D 1/06 - Pompes multiétagées
• F04D 29/16 - Joints d'étanchéité entre le côté du refoulement et celui de l'aspiration
• F04D 29/24 - Aubes
• F04D 29/44 - Moyens de guidage du fluide, p.ex. diffuseurs
• F04D 31/00 - Pompage simultané de liquides et de fluides compressibles

Abrégé

A multiphase pump is proposed for conveying a multiphase process fluid from a low pressure side (LP) to a high pressure side (HP), comprising a housing (2) having a pump inlet (3) and a pump outlet (4) for the process fluid, further comprising an inlet annulus (5) designed for receiving the process fluid from the pump inlet (4), a discharge annulus (6) designed for discharging the process fluid into the pump outlet (4), a pump rotor (7) for rotating about an axial direction (A) arranged within the housing (2), with the pump rotor (7) being designed for conveying the process fluid from the inlet annulus (5) to the outlet annulus (6), and a return line (9) for returning the process fluid from the high pressure side (HP) to the low pressure side (LP), wherein the return line (9) comprises an inlet (91) for receiving the process fluid, an outlet (92) for discharging the process fluid and a control valve (93) for opening and closing the return line (9), and wherein the inlet (91) of the return line (9) is arranged directly at the discharge annulus (6).

Classes IPC  ?

• F04D 15/00 - Commande, p.ex.régulation de pompes, d'installations ou de systèmes de pompage
• F04D 7/04 - Pompes adaptées à la manipulation de liquides particuliers, p.ex. par choix de matériaux spéciaux pour les pompes ou pièces de pompe du type centrifuge les fluides étant visqueux ou non homogènes
• F04D 15/02 - Arrêt de pompes ou de soupapes en cas de fonctionnement indésirable
• F04D 27/00 - Commande, p.ex. régulation, des pompes, des installations ou des systèmes de pompage spécialement adaptés aux fluides compressibles
• F04D 27/02 - Contrôle de l'emballement
• F04D 31/00 - Pompage simultané de liquides et de fluides compressibles

Abrégé

The present invention relates to a three-dimensional printing system for preparing a three-dimensional object made at least partially of an expanded polymer comprising: i) a printing device (10) for preparing an expandable polymer melt and for depositing a strand of the expandable, expanding or expanded polymer onto a surface and II) a three-dimensional movement device for adjusting the position of the printing device in a predefined three-dimensional matrix so as to allow to deposit the strand of expandable, expanding or expanded polymer at a predetermined time at a precise position within the three-dimensional matrix, wherein the printing device comprises: a) a feed section (16) at the upstream end of the printing device b) a heating section (20), c) a pressurizing section (22), d) a blowing agent supply line (26), e) a mixing section (24), f) a cooling section (28)and g) a terminal printing head section (30) at the downstream end of the printing device including a die for depositing the strand of expandable, expanding or expanded polymer onto the surface, wherein the mixing section e) and the cooling section f) are arranged downstream of the feed section a), of the heating section b) and of the pressurizing section c), and wherein the blowing agent supply line d) has one or more discharge end(s), which i s/a re connected with one or more of the pressurizing section c), mixing section e) and cooling section f).

Classes IPC  ?

• B29C 44/02 - Moulage par pression interne engendrée dans la matière, p.ex. par gonflage ou par moussage pour la fabrication d'objets de longueur définie, c.à d. d'objets séparés
• B33Y 10/00 - Procédés de fabrication additive
• B33Y 30/00 - Appareils pour la fabrication additive; Leurs parties constitutives ou accessoires à cet effet
• B29C 64/106 - Procédés de fabrication additive n’utilisant que des matériaux liquides ou visqueux, p.ex. dépôt d’un cordon continu de matériau visqueux
• B29C 64/118 - Procédés de fabrication additive n’utilisant que des matériaux liquides ou visqueux, p.ex. dépôt d’un cordon continu de matériau visqueux utilisant un matériau filamentaire mis en fusion, p.ex. modélisation par dépôt de fil en fusion [FDM]
• B29C 64/194 - Procédés de fabrication additive impliquant des opérations supplémentaires effectuées sur les couches ajoutées, p.ex. lissage, meulage ou contrôle d’épaisseur pendant l’empilage des couches
• B29C 64/209 - Têtes; Buses
• B29C 44/50 - Alimentation en matière à mouler dans une cavité de moulage ouverte ou sur une surface mobile, c.à d. pour la fabrication d'objets de longueur indéfinie par différence de pression, p.ex. par extrusion ou par pulvérisation

Abrégé

The present invention relates to a plant for preparing a purified isomeric methylene diphenyl diisocyanate monomer from a mixture of different isomeric monomers, wherein the plant comprises a distillation apparatus, which comprises: a) a distillation column including a structured packing, b) a source for a mixture of different isomeric methylene diphenyl diisocyanate monomers, c) an evaporator, d) an overhead vapor condenser, e) optionally, an overhead vacuum system and f) a flow-controlled reflux system, wherein the overhead vapor condenser comprises a shell and tube arrangement and is embodied so as to directly subcool the condensate to less than 47°C, and wherein the flow-controlled reflux system comprises a heater, which is embodied so as to reheat a partial stream of the condensate formed in the overhead vapor condenser up to 190 °C.

Classes IPC  ?

• C07C 263/20 - Séparation; Purification
• C07C 265/14 - Dérivés d'acide isocyanique contenant au moins deux groupes isocyanate liés au même squelette carboné

Abrégé

A mixing duct (1) for mixing of a turbulent flow having an inlet (10) and an outlet (15), containing at least one static mixer element (50) which comprises at least two at least substantially coplanar plate-like segments (70) and (70'), wherein a substantially longitudinal gap (80) is formed between the segments (70) and (70'), wherein each segment (70) and (70') is attached to the duct wall (5) and comprises at least two free edges (72) and (72'), wherein one free edge (72) is the leading edge (74) and the other free edge (72') is adjacent to the longitudinal gap (80), and wherein the at least two segments (70) and (70') are inclined relative to the duct axis (2) so that the leading edge (74) is oriented up-stream in the duct (1) and substantially perpendicular to the direction of a main fluid flow (30).

Classes IPC  ?

• B01F 25/431 - Tubes de mélange droits avec des chicanes ou des obstructions qui ne provoquent pas de chute de pression importante; Chicanes à cet effet

Abrégé

The invention is directed to a combined naphtha hydrotreating (NHT) and isomerization process scheme, which includes dividing wall columns (DWC) that replace multiple distillation columns and allow optimized heat integration within the system. The disclosed design provides reductions in both capital and energy costs compared to conventional schemes.

Classes IPC  ?

• B01D 3/14 - Distillation fractionnée
• B01D 3/32 - Autres caractéristiques de colonnes de fractionnement
• C07C 5/13 - Préparation d'hydrocarbures à partir d'hydrocarbures contenant le même nombre d'atomes de carbone par hydrogénation avec isomérisation simultanée
• C07C 5/22 - Préparation d'hydrocarbures à partir d'hydrocarbures contenant le même nombre d'atomes de carbone par isomérisation
• C07C 7/09 - Purification, séparation ou stabilisation d'hydrocarbures; Emploi d'additifs par condensation fractionnée
• C07C 17/358 - Préparation d'hydrocarbures halogénés par des réactions n'influençant pas le nombre d'atomes de carbone ou d'halogène dans les molécules par isomérisation
• C10G 35/00 - Réformage de l'essence "naphta"

Abrégé

The invention relates to a shaft bearing device (1) for a pump (2), wherein the shaft bearing device (1) comprises an antifriction bearing (8, 81, 815), which can be connected to an axially displaceable pump shaft (5). A spring (7, 71, 72) is arranged at the antifriction bearing (8, 81, 815) in such a way, that a spring force (F) can be transmitted to an outer ring of the antifriction bearing (8, 81, 815) by means of the spring (7, 71, 72) in a mounting condition of the shaft bearing device (1). A lifting element (3) attached to the pump shaft (5) and a corresponding counter element (4) are separated from each other by the spring force in a starting state and/or in a shutdown state of the pump (2). The invention further relates to a pump (2) with a corresponding shaft bearing device (1).

Classes IPC  ?

• F16C 27/08 - Paliers ou supports de paliers élastiques ou extensibles pour mouvement de rotation exclusivement pour charges axiales principalement, p.ex. pour arbres disposés verticalement
• F04B 53/00 - "MACHINES" À LIQUIDES À DÉPLACEMENT POSITIF; POMPES - Parties constitutives, détails ou accessoires non prévus dans les groupes ou ou présentant un intérêt autre que celui visé par ces groupes
• F04D 29/046 - Paliers
• F04D 29/049 - Paliers à roulements
• F16C 35/04 - Supports rigides de paliers; Corps de paliers, p.ex. calottes, couvercles dans le cas de roulements à billes ou à rouleaux

Abrégé

A pump casing for a centrifugal pump is proposed, the pump casing extending in an axial direction (A) and having a first housing part (2), a second housing part (3) for being sealingly attached to the first housing part (2), a plurality of securing elements (4) for linking the first and the second housing part (2, 3), and a radial sealing element (5) for sealing between the first and the second housing part (2, 3), wherein the first housing part (2) has a first axial end surface (21), and the second housing part (3) has a second axial end surface (31), said first and second axial end surfaces (21, 31) facing each other, and wherein the first axial end surface (21) comprises an annular protrusion (22) extending in the axial direction (A) and the second axial end surface (31) comprises an annular recess (32) configured for engaging with the annular protrusion (22), wherein the annular protrusion (22) is arranged radially inwardly with respect to the securing elements (4). In addition, a centrifugal pump is proposed.

Classes IPC  ?

• F04D 29/08 - Joints d'étanchéité
• F04D 1/04 - Pompes hélicocentrifuges
• F04D 29/42 - Carters d'enveloppe; Tubulures pour le fluide énergétique pour pompes radiales ou hélicocentrifuges

Abrégé

A process to prepare a (iv) cyclic polyester oligomer composition comprising a cyclic polyester oligomer having furanic units and two to five repeat units is disclosed. The process comprises the steps of: (a) reacting a monomer composition comprising: (i) a bifunctional furan-derivative and (ii) a diol in an linear oligomerization step to produce a (iii) linear oligomer composition comprising a linear oligomer species, (b) reacting the (iii) linear oligomer composition in a distillation-assisted cyclization (DA-C) step to form a (iv) cyclic polyester oligomer composition and a (v) diol byproduct, wherein the (v) diol byproduct is removed by evaporation in the distillation-assisted cyclization (DA-C) step.

Classes IPC  ?

• C08G 63/181 - Acides contenant des cycles aromatiques
• C07C 67/465 - Préparation d'esters d'acides carboxyliques par oligomérisation
• C07C 69/608 - Esters d'acides carboxyliques avec un groupe carboxyle lié à un atome de carbone acyclique et comportant un cycle autre qu'un cycle aromatique à six chaînons dans la partie acide
• C08G 63/81 - Procédés de préparation utilisant des solvants
• C08G 63/90 - Purification; Séchage
• C08G 63/91 - Polymères modifiés par post-traitement chimique

Abrégé

The present disclosure relates to a valve tray for use in a chemical process column. The valve tray includes a plurality of apertures formed therein. A plurality of valves are maintained in a spaced relationship relative to individual apertures of the plurality of apertures. An area of the individual apertures is less than an area of individual valves of the plurality of valves.

Classes IPC  ?

• B01D 3/16 - Colonnes de fractionnement dans lesquelles la vapeur barbote à travers le liquide
• B01D 3/20 - Calottes de barbotage; Colonnes montantes pour la vapeur; Tubes d'évacuation pour le liquide
• B01D 3/22 - Colonnes de fractionnement dans lesquelles la vapeur barbote à travers le liquide à grilles ou plateaux perforés horizontaux; Construction de ces éléments
• B01D 3/32 - Autres caractéristiques de colonnes de fractionnement

Abrégé

The present invention relates to a method for fractionating a crude mixture comprising at least one oil and at least one wax, which comprises the following method steps: (a) carrying out a pre-fractionation stage as a layer crystallization (i) with a crude mixture comprising at least one oil and at least one wax or (ii) with a crude solvent mixture obtained by adding prior to the pre-fractionation stage at most 100% by weight of solvent relative to the weight of the crude mixture, to prepare a first fraction containing low waxy oil and a second fraction containing low oily wax, (b) carrying out a first crystallization stage including (b1) a first suspension crystallization sub-stage with the first fraction containing low waxy oil to prepare a third fraction containing dewaxed oil and a fourth fraction and (b2) after the first suspension crystallization sub-stage, a second suspension crystallization sub-stage with a mixture of the fourth fraction obtained in method step (b1) and the second fraction containing low oily wax obtained in the pre-fractionation stage of method step (a) to prepare a fifth fraction containing slack wax and a sixth fraction.

Classes IPC  ?

• B01D 9/00 - Cristallisation
• C10G 73/00 - Obtention ou raffinage des cires minérales, p.ex. de la cire de lignite
• C11B 7/00 - Séparation des mélanges de graisses ou huiles en leurs constituants, p.ex. séparation des huiles saturées des huiles non saturées

Abrégé

A process to produce a polyester polymerby polymerization of a cyclic polyester oligomer composition comprising a cyclic polyester oligomerhaving furanic unitsin the presence of a plasticizer, as wellas the polyester polymer obtained thereby.

Classes IPC  ?

• C07D 307/68 - Atomes de carbone comportant trois liaisons à des hétéro-atomes avec au plus une liaison à un halogène
• C08G 63/181 - Acides contenant des cycles aromatiques
• C08G 63/78 - Procédés de préparation
• C08G 63/90 - Purification; Séchage
• C08G 63/91 - Polymères modifiés par post-traitement chimique

Abrégé

A centrifugal pump for conveying a fluid is proposed, with a housing (2), having an inlet (3) and an outlet (4) for the fluid, with an impeller (5) arranged in the housing (2) for rotation in an axial direction (A) in order to convey the fluid from the inlet (3) to the outlet (4), with a shaft (6) extending in the axial direction (A) for driving the impeller (5), as well as with a stationary guide device (7) for guiding the fluid from the impeller (5) to the outlet (4), which guide device (7) is connected to the housing (2), wherein a resilient compensating element (10) is provided between the housing (2) and the guide device (7), which compensating element is arranged around the shaft (6) and which can hold the guide device (7) in a centered position to the impeller (5) during a radial relative movement to the housing (2).

Classes IPC  ?

• F04D 29/00 - POMPES À DÉPLACEMENT NON POSITIF - Parties constitutives, détails ou accessoires
• F04D 7/02 - Pompes adaptées à la manipulation de liquides particuliers, p.ex. par choix de matériaux spéciaux pour les pompes ou pièces de pompe du type centrifuge
• F04D 7/06 - Pompes adaptées à la manipulation de liquides particuliers, p.ex. par choix de matériaux spéciaux pour les pompes ou pièces de pompe du type centrifuge les fluides étant chauds ou corrosifs, p.ex. du métal liquide
• F04D 29/08 - Joints d'étanchéité
• F04D 29/22 - Rotors spécialement pour les pompes centrifuges
• F04D 29/42 - Carters d'enveloppe; Tubulures pour le fluide énergétique pour pompes radiales ou hélicocentrifuges

Abrégé

A multi-stage horizontal centrifugal pump for conveying a fluid is disclosed. The pump has a rotor comprising a rotatably arranged shaft and a plurality of impellers for conveying the fluid. All impellers are arranged in a rotatably fixed manner on the shaft. The pump has a stator comprising a plurality of stage casings, which are arranged consecutively one after another with respect to an axial direction determined by a central axis. The stator encompasses the rotor. All stage casings are designed and arranged centrically with respect to the central axis. A plurality of wear rings is provided between the rotor and the stator, each of which is fixed with respect to the stator and respectively surrounds the rotor with a clearance. At least one of the wear rings is designed eccentrically.

Classes IPC  ?

• F04D 1/06 - Pompes multiétagées
• B23P 6/00 - Remise en état ou réparation des objets

Abrégé

A pump drive unit is proposed for conveying a process fluid having a common housing (4) which surrounds a pump (2) having an impeller (21) for rotation about an axial direction (A) and a drive (3) for the pump (2), having a shaft (5) for driving the impeller (21) which connects the drive (3) to the pump (2), and having a restrictor (13) which extends around the shaft (5) and is arranged between the impeller (21) and the drive (3), with the housing (4) having a pump inlet (22) and a pump outlet (23) for the process fluid, with an inlet (43) being provided for a barrier fluid through which the barrier fluid can be introduced into the drive (3) and with an outlet (44) being provided for the barrier fluid through which the barrier fluid can be drained from the housing (4), and wherein a plurality of storage chambers (11) for the barrier fluid are provided at the shaft (5) in the region between the restrictor (13) and the drive (3), said storage chambers (11) are arranged behind one another with respect to the axial direction (A), with a respective two adjacent storage chambers (11) being in flow communication with one another.

Classes IPC  ?

• F04D 7/00 - Pompes adaptées à la manipulation de liquides particuliers, p.ex. par choix de matériaux spéciaux pour les pompes ou pièces de pompe
• F04D 7/06 - Pompes adaptées à la manipulation de liquides particuliers, p.ex. par choix de matériaux spéciaux pour les pompes ou pièces de pompe du type centrifuge les fluides étant chauds ou corrosifs, p.ex. du métal liquide
• F04D 13/08 - Ensembles comprenant les pompes et leurs moyens d'entraînement la pompe étant entraînée par l'électricité pour utilisation en position immergée
• F04D 29/40 - Carters d'enveloppe; Tubulures pour le fluide énergétique
• H02K 5/132 - Moteurs électriques submersibles

Abrégé

An axially split pump for conveying a fluid is suggested having an axially split housing (2) that comprises a bottom part (21) and a cover (22), wherein the bottom part (21) has a first sealing surface (212) and a cover (22) has a second sealing surface (222), wherein the bottom part (21) and the cover (22) can be fastened to one another in such a way that the two sealing surfaces (212, 222) have a direct contact with one another, wherein a first sealing groove (213) for the reception of a first string-like sealing element (10) is provided in the sealing surfaces (212, 222), and a second sealing groove (214) is provided for the reception of a second string-like element (11), the second sealing groove (214) being connected to the first sealing groove (213) via an opening (20), and wherein a connection element (50) is provided in the opening (20) that has two lateral cut-outs (51) respectively for the reception of a string-like sealing element (10, 11), wherein the cut-outs (51) are arranged and configured in such a way that the two string-like sealing elements (10, 11) can run substantially in parallel in the region of the connection element (50).

Classes IPC  ?

• F04D 29/08 - Joints d'étanchéité
• F04D 1/06 - Pompes multiétagées
• F04D 29/40 - Carters d'enveloppe; Tubulures pour le fluide énergétique

Abrégé

An axially split pump for conveying a fluid is suggested having an axially split housing (2) which comprises a bottom part (21) and a cover (22), wherein the bottom part (21) has a first sealing surface (212) and the cover (22) has a second sealing surface (222), wherein the bottom part (21) and the cover (22) can be fastened to one another in such a way that the two sealing surfaces (212, 222) have a direct contact with one another, wherein at least one first sealing groove (213) for the reception of a first sealing element (10) is provided in the sealing surfaces (212, 222), and wherein at least a second sealing groove (29; 29'; 214) is provided for the reception of a second sealing element, wherein the first sealing groove (213) and the second sealing groove (29; 29'; 214) are connected to one another through a connection region (30) and wherein an elastic pre-loading ele- ment (71) is provided in the connection region (30), which exerts a pre-load onto one of the two sealing elements (10, 11, 12).

Classes IPC  ?

• F04D 29/40 - Carters d'enveloppe; Tubulures pour le fluide énergétique
• F04D 29/08 - Joints d'étanchéité

Abrégé

An axially split pump for conveying a fluid is suggested, having an axially split housing (2) that comprises a bottom part (21) and a cover (22), having a rotatable shaft (3) that determines an axial direction (A), as well as having at least one side cover (9) for closing the housing (2) in the axial direction, wherein the side cover (9) has a first contact surface (91) for cooperating with a second contact surface (23) provided at the housing (2), the second contact surface extending both over the bottom part (21) and the cover (22), wherein the bottom part (21) has a first sealing surface (212) and the cover (22) has a second sealing surface (222), wherein the bottom part (21) and the cover (22) can be fastened to one another in such a way that the two sealing surfaces (212, 222) have a direct contact with one another, wherein at least one sealing groove (213) is provided in one of the sealing surfaces (212, 222) for the reception of a string-like sealing element (10), the sealing groove (213) extending up to the second contact surface (23) of the housing (2), wherein a recess (24) surrounding the shaft (3) is provided in the second contact surface (23) and wherein a projection (92) surrounding the shaft (23) is provided in the first contact surface (91) of the side cover (9), wherein the recess (24) and the projection (92) are configured and arranged in such a way that they together form a ring-like groove (29) for the reception of a ring-like sealing element (11) in the mounted state of the side cover (9).

Classes IPC  ?

• F04D 29/10 - Joints d'étanchéité pour arbre
• F04D 29/12 - Joints d'étanchéité pour arbre utilisant des bagues

Abrégé

A process and an apparatus for the purification of a crude acrylic acid composition containing maleic anhydride as an impurity comprising the following steps: (a) carrying out at least one dynamic melt crystallization stage (14, 14a, 14b, 14c, 14d) with the crude acrylic acid composition to prepare a first purified acrylic acid composition and a first residue containing at least 3.5 % by weight maleic anhydride, (b) adding a solvent (26) which is capable of dissolving maleic anhydride to the first residue in an amount that the weight ratio of the solvent to the maleic anhydride is 0.3 or more to prepare a ratio- adjusted residue and (c) carrying out at least one further dynamic melt crystallization stage and/ or at least one static melt crystallization stage (18, 18a, 18b) with the ratio-adjusted residue to prepare a second purified acrylic acid composition and a second residue.

Classes IPC  ?

• C07C 51/43 - Séparation; Purification; Stabilisation; Emploi d'additifs par changement de l'état physique, p.ex. par cristallisation
• B01D 9/00 - Cristallisation
• C07C 57/04 - Acide acrylique; Acide méthacrylique

Abrégé

A method for stabilizing a condensed phase composition in a process of manufacturing a polyester from cyclic ester monomer comprising the steps of devolatilizing a reaction mixture, which contains i) at least one polymerizable cyclic ester, ii) at least one catalyst and optionally at least one initiator, to produce a vapor stream and a molten residue, wherein the vapor stream includes mainly i) the at least one polymerizable cyclic ester and ii) the at least one catalyst and/or the at least one initiator and/or a reaction product or a residue of the at least one catalyst and/or the at least one initiator and condensing the vapor stream to form the condensed phase composition, wherein at least one polymerization inhibitor is added as stabilizer to the reaction mixture and/or to the condensed phase composition in an amount so that the degree of conversion of the polymerizable cyclic ester in the condensed phase composition is not more than 15 %, wherein the degree of conversion is 100?(c0 - CF)/c0, wherein c0 is the initial concentration of the cyclic ester in the condensed phase composition obtained by the condensation of the vapor stream and CF is the concentration of the cyclic ester in the condensed phase composition after addition of 150 ppm of tin octoate as catalyst and of 100 mmol/kg of ethyl-hexanol as initiator to the condensed phase composition and a subsequent heat treatment of condensed phase composition under inert atmosphere conditions for 12 hours at 160°C.

Classes IPC  ?

• C08G 63/78 - Procédés de préparation
• C08G 63/08 - Lactones ou lactides
• C08G 63/90 - Purification; Séchage

Abrégé

A fractionation tray includes a manway unit positioned to cover a manway opening in the fractionation tray. The manway opening is framed by one or more fractionation tray panels having apertures therethrough adjacent to the manway opening. The manway unit includes a first manway panel having: perforations for the passage of fluid; first and second opposing side edges and two opposing end edges; and finger elements extending from the second side edge. The finger elements of the second side edge are received within the apertures adjacent to a first side of the manway opening. The manway unit is configured to open and close by rotation of the finger elements within the apertures.

Classes IPC  ?

• B01D 3/30 - Colonnes de fractionnement à pièces mobiles ou dans lesquelles est produit un mouvement centrifuge

Abrégé

A process is disclosed to recycle and/or formulate expandable plastic materials using a system (1) comprising: an extruder unit (10), a mixer-heat exchanger unit (20), said process comprising the steps of: melting in the extruder unit (10), cooling in the mixer-heat exchanger unit (20), and controlling the melt pressure by means of a melt pump unit (50), followed by granulation, extrusion, or injection molding, wherein a first expansion agent (81) is not degassed during a melt processing in the system (1) such that it is substantially contained in the granulated expandable plastic material (130) or used to form either the extruded, formed and expanded plastic material (140) or the molded expanded plastic article (150). The present invention also relates to a granulated expandable plastic material (130), an extruded, formed and expanded plastic material (140), and a molded expanded plastic article (150) obtainable by said process.

Classes IPC  ?

• B29C 44/34 - Moulage par pression interne engendrée dans la matière, p.ex. par gonflage ou par moussage - Eléments constitutifs, détails ou accessoires; Opérations auxiliaires
• B29B 17/00 - Récupération de matières plastiques ou d'autres constituants des déchets contenant des matières plastiques
• B29C 44/42 - Alimentation en matière à mouler dans une cavité de moulage fermée, c.à d. pour la fabrication d'objets de longueur définie par différence de pression, p.ex. par injection ou sous vide
• B29C 44/50 - Alimentation en matière à mouler dans une cavité de moulage ouverte ou sur une surface mobile, c.à d. pour la fabrication d'objets de longueur indéfinie par différence de pression, p.ex. par extrusion ou par pulvérisation

Abrégé

A method for the removal of an ester from a vapor mixture containing the ester is disclosed. The method comprises the steps of by bringing the vapor mixture into contact with an aqueous solution containing the acid corresponding to the ester, wherein a portion of the ester is dissolved in or otherwise transferred to the aqueous solution, and the aqueous solution is after the contact led in a circulation, the aqueous solution is processed in the circulation in a process comprising: a heating step, a reaction step having a residence time and a temperature, a cooling step, wherein the heating step precedes the reaction step, the reaction step precedes the cooling step, and the residence time and the temperature in the reaction step are sufficient to substantially reduce the content of the ester in the aqueous solution. The invention further relates to an apparatus for carrying out said process. The present invention further relates also to the use of the apparatus in the method of the invention, preferably in the production of a lactide or a polylactic acid polymer.

Classes IPC  ?

• B01D 53/14 - SÉPARATION Épuration chimique ou biologique des gaz résiduaires, p.ex. gaz d'échappement des moteurs à combustion, fumées, vapeurs, gaz de combustion ou aérosols par absorption
• B01D 53/96 - Régénération, réactivation ou recyclage des réactifs

Abrégé

The invention relates to a system for controlling a pump (9), such as a submersible pump intended for pumping water, comprising a pump (9) and a separate electronic control unit (7) connected to the pump (9) by an electrical cable (13). The invention is achieved by that the control unit (7) is adapted to be detachably connected to the pump (9), by that the control unit (7) is adapted to allow the pumps power supply to pass through the control unit (7), by that an electronic controller (26) is arranged in the pump (9) for controlling at least one of the pumps functions and/or monitoring at least one of the pumps operating conditions, and by that the pump (9) and the control unit (7) are adapted to communicate with each other and transmitting signals, comprising necessary control and/or monitoring information/data, between each other. The present invention also relates to a pump (9) and an electronic control unit (7) for use in the system according to the invention.

Classes IPC  ?

• F04D 15/00 - Commande, p.ex.régulation de pompes, d'installations ou de systèmes de pompage
• F04B 49/06 - Commande utilisant l'électricité
• F04D 13/08 - Ensembles comprenant les pompes et leurs moyens d'entraînement la pompe étant entraînée par l'électricité pour utilisation en position immergée

Abrégé

Disclosed is a method to prepare a polylactic acid comprising the steps of performing a ring opening polymerization using a catalyst and either a catalyst killer compound or an endcapping additive to obtain a raw polylactic acid of MW greater than 10,000 g/mol, purifying the raw polylactic acid by removing and separating low boiling compounds comprising lactide and impurities from the raw polylactic acid by devolatization of the low boiling compounds as a gas phase stream, and purifying the lactide from the devolatization and removing the impurities from the gas phase stream of evaporated low boiling compounds by means of crystallization by desublimation from the gas phase, wherein the lactide is purified and the removed impurities include a catalyst residue and a compound containing at least one hydroxyl group such that the purified lactide is then polymerized by feeding it back into the ring opening polymerization. The invention further relates to an apparatus for carrying out the method comprising a polymerization reactor for performing a ring opening polymerization to obtain a raw polylactic acid, a devolatization apparatus for separating low boiling compounds comprising lactide and impurities from a raw polylactic acid, and a crystallization apparatus for purifying a lactide and removing impurities by means of a desublimation and a crystallization in the same crystallization apparatus.

Classes IPC  ?

• C08G 63/78 - Procédés de préparation
• B01D 7/00 - Sublimation
• B01D 7/02 - Cristallisation directement à partir de la phase vapeur
• B01D 9/02 - Cristallisation à partir de solutions
• B01D 9/04 - Cristallisation à partir de solutions en concentrant les solutions par extraction du solvant congelé
• C08G 63/08 - Lactones ou lactides
• C08G 63/90 - Purification; Séchage

Abrégé

Disclosed is a method to prepare a polylactic acid comprising the steps of: performing a ring opening polymerization using a catalyst and either a catalyst killer compound or an endcapping additive to obtain a raw polylactic acid of MW greater than 10,000 g/mol, purifying the raw polylactic acid by removing and separating low boiling compounds comprising lactide and impurities from the raw polylactic acid by devolatization of the low boiling compounds as a gas phase stream, purifying the lactide from the devolatization and removing the impurities from the gas phase stream of evaporated low boiling compounds by means of condensing the evaporated gas phase stream to give a condensed stream and a subsequent melt crystallization of the condensed stream, wherein the lactide is purified and the removed impurities include a catalyst residue and a compound containing at least one hydroxyl group such that the purified lactide is polymerized by feeding it back into the ring opening polymerization. The invention further relates to an apparatus for carrying out the method comprising: a polymerization reactor for performing a ring opening polymerization to obtain a raw polylactic acid, a devolatization apparatus for removing and separating low boiling compounds comprising lactide and impurities from a raw polylactic acid, and a crystallization apparatus for purifying a lactide and removing impurities from a condensed stream, wherein a condenser for condensing a gas phase stream to give a condensed stream is arranged between the devolatization apparatus and the crystallization apparatus.

Classes IPC  ?

• C07D 319/12 - Dioxanes-1, 4; Dioxanes-1, 4 hydrogénés non condensés avec d'autres cycles
• B01D 9/00 - Cristallisation
• B01D 9/02 - Cristallisation à partir de solutions
• B01D 9/04 - Cristallisation à partir de solutions en concentrant les solutions par extraction du solvant congelé
• C08G 63/08 - Lactones ou lactides

Abrégé

A method of mass transfer includes the steps of: supplying a first fluid and a second fluid into a mass transfer apparatus, wherein the mass transfer apparatus includes a vessel which has a head region, a base region and a mass transfer region, wherein the first fluid is brought into contact with the second fluid at least in the mass transfer region, wherein the mass transfer region is arranged between the head region and the base region and the mass transfer region includes a structured packing which includes a plurality of neighboring layers of fabric which includes fiber strands of a non-metallic material. The mass transfer apparatus is operated at a fluid load of at most 3 m3/m2/h. The fabric of the structured packing includes fiber strands of a non-metallic material which are formed as weft threads, wherein the weft threads have a yarn count of at least 100 g/ 1000 m and the weft threads include at least 20 yarns/25.4 mm

Classes IPC  ?

• B01J 10/00 - Procédés chimiques généraux faisant réagir un liquide avec des milieux gazeux autrement qu'en présence de particules solides; Appareillage spécialement adapté à cet effet
• B01J 19/32 - Eléments de remplissage en forme de grille ou d'éléments composés de plusieurs pièces pour constituer une unité ou un module dans l'appareil de transfert de chaleur ou de matière

Abrégé

The valve cover has a guide vane extending laterally and downwardly from the central portion towards and in spaced relation to the tray deck for deflecting a majority of the vapor passing upwardly through an orifice downward towards the tray deck. A de-entrainment device with a downwardly angled deflector in vertical alignment with an orifice in the tray deck may be integrated or not with the valve cover below the tray deck.

Classes IPC  ?

• B01D 3/16 - Colonnes de fractionnement dans lesquelles la vapeur barbote à travers le liquide

Abrégé

The invention relates to a device for separating a heavy fraction from a fluid, comprising: a main channel (20); swirl means (6) in the main channel; collecting means (13) adjoining the main channel for collecting the discharge heavy fraction; a concentric additional supply conduit (3) with an outlet (5) and extending into the cylindrical housing (2); a return channel (16) connecting the collecting means with the additional supply conduit, and deflection means (7) wherein the outlet (5) is encircling the circumference o the additional supply conduit (3). The invention also relates to a method for separating a heavy fraction from a fluid using such a device.

Classes IPC  ?

• B04C 3/06 - Structures des entrées ou sorties de la chambre où se produit le tourbillon
• B04C 3/00 - Appareils dans lesquels la direction axiale du tourbillon ne change pas

Abrégé

The invention relates to a device for separating a flowing fluid into at least two fractions with differing mass density, comprising: a main tube in the form of a cylinder jacket and having an infeed opening and an outfeed opening; a first swirl element arranged in the main tube for imparting a rotating movement to the fluid flowing through the main tube; a first auxiliary tube placed in the main tube at a distance from the first swirl element; and first discharge means connecting to the jacket of the main tube for discharging a heavier fraction of the fluid. The invention also relates to a method for separating into fractions a fluid comprising several fractions.

Classes IPC  ?

• B01D 45/12 - Séparation de particules dispersées dans des gaz ou des vapeurs par gravité, inertie ou force centrifuge en utilisant la force centrifuge
• B01D 17/02 - Séparation de liquides non miscibles
• B01D 45/16 - Séparation de particules dispersées dans des gaz ou des vapeurs par gravité, inertie ou force centrifuge en utilisant la force centrifuge produite par le mouvement hélicoïdal du courant gazeux

Abrégé

An absorber or desorber contains a layer (10) for a structured packing which has corrugations, wherein a plurality of open channels (12, 14, 16) is formed by the corrugations, wherein the channels include a first corrugation valley (22), a first corrugation peak (32) and a second corrugation peak (42). The first corrugation peak (32) and the second corrugation peak (42) bound the first corrugation valley (22), wherein the first and second corrugation peaks have a first apex (33) and a second apex (43). An indentation (34) extending in the direction of the first apex (33) is formed on the first apex (33) of the first corrugation peak (32). The first corrugation valley (22) has a valley bottom (23), wherein the normal spacing (27) of at least one point of the indentation (34) from the valley bottom (23) of the corrugation valley (22) is smaller than the normal spacing (28) of the first apex (33) from the valley bottom (23) of the corrugation valley (22).

Classes IPC  ?

• B01J 19/32 - Eléments de remplissage en forme de grille ou d'éléments composés de plusieurs pièces pour constituer une unité ou un module dans l'appareil de transfert de chaleur ou de matière

Abrégé

The invention relates to a device for separating a flowing liquid mixture into at least two fractions with differing mass density, comprising: a plurality of plates disposed substantially parallel to each other and a frame engaging at least substantially round the plates. The invention also relates to a through flow tank provided with such a plate separator device and a method for manufacturing a plate separator device.

Classes IPC  ?

• B01D 17/02 - Séparation de liquides non miscibles

Abrégé

Continuous process for the ring-opening polymerisation of cyclic ester monomers to form aliphatic polyesters at a temperature between 100-240°C which comprises the steps of : a) continuously providing cyclic ester monomer and polymerisation catalyst to a continuous mixing reactor, the reactor being operated at conditions effective for polymerisation to form a prepolymerised reaction mixture, b) continuously removing pre-polymerised reaction mixture from the continuous mixing reactor and continuously providing pre-polymerised reaction mixture to a plug flow reactor, the plug flow reactor being operated under polymerisation conditions, wherein the reaction mixture is polymerised to a degree of polymerisation of at least 90%, to form polymer c) continuously removing polymer from the plug flow reactor.

Classes IPC  ?

• C08G 63/78 - Procédés de préparation

Abrégé

An apparatus and method are provided that enable the control of a screening operation based on a calculated screen blockage percentage and the velocity throughput of the screen. The apparatus includes an upstream level detector, a downstream level detector and a flow determining device which determines the volumetric flow through the screen. The apparatus may further include a blockage determination unit which determines the percent screen blockage based on the flow level upstream of the screen, the flow level downstream of the screen and the volumetric flow.

Classes IPC  ?

• B01D 33/00 - Filtres avec éléments filtrants mobiles au cours de l'opération de filtration
• B01D 33/44 - Régénération de la substance filtrante dans le filtre
• C02F 1/00 - Traitement de l'eau, des eaux résiduaires ou des eaux d'égout
• E02B 5/08 - Cours d'eau artificiels - Parties constitutives, p.ex. portes, crépines
• B01D 35/143 - Indicateurs de l'état du filtre

Abrégé

A filter element (2) for use in a disc filter (1), wherein a plurality of filter elements (2) are arranged on a rotor shaft (3) in a manner allowing liquid communication between the inside (4) of the filter elements (2) and the inside (5) of the rotor shaft (3), for the filtering of liquids. The filter element (2) comprises a framework (6) carrying a filter cloth (7) on both its side surfaces (8), wherein the framework (6) and the filter cloth (7) are permanently joined forming a single use filter element (2) and the filter element has at least one passage (21 ) in each edge (22) for liquid communication between the inside (4) of adjacent filter elements. A disc filter (1) comprising a single use filter element (2) is also provided.

Classes IPC  ?

• B01D 33/23 - Structure des disques ou des secteurs qui les composent
• B01D 33/21 - Filtres avec éléments filtrants mobiles au cours de l'opération de filtration à surfaces filtrantes rotatives planes à disques filtrants creux montés de façon transversale sur un arbre creux rotatif

Abrégé

A static mixing element for installation in a hollow body (10) includes a plurality of bar elements, with a first arrangement (21) including at least one first bar element (3) and being arranged cross-wise with respect to a second arrangement (31) which includes at least one second bar element (4). The first arrangement (21) and the second arrangement (31) include an angle different from 0° to the main direction of flow. The first arrangement includes an angle larger than 0° with the second arrangement. On projection of the first arrangement (21) and of the second arrangement (31) onto a projection plane which is disposed normal to the main direction of flow, intermediate spaces are disposed at least partly between mutually adjacent bar elements.

Abrégé

An apparatus for the mixing conveying of fluids with heat exchange includes a housing (2), with installations (4) arranged therein. The installations (4) include a first hollow structure (5), with a first fluid (6) being able to flow through the first hollow structure (5) and a second fluid being able to flow around the first hollow structure. The second fluid (7) flows along a main flow direction (76) which is substantially disposed along the longitudinal axis (3) of the housing. A second hollow structure (105) is provided through which the first fluid (6) can flow and which can be flowed around by the second fluid (7), with the second hollow structure being arranged cross-wise with respect to the first hollow structure. The hollow structures (5, 105) have a flow cross-section with a first width B1 and a second width B2, with B1/B2 being larger than one and B1 is oriented normally to a plane which contains the longitudinal axis (3) of the housing or a line parallel to said longitudinal axis and an axis of the hollow strucure (5,105).

Abrégé

The device (1) serves for the generation of a discrete liquid phase in a continuous liquid phase with a first or a second liquid. The two liquids coexist as separate phases, have different densities and permit a desired exchange of material. Provision is made to arrange the device in a container (9) which contains the second liquid forming the continuous phase. The device includes a distribution member (2), in particular a cylindrical tube, and a collection passage (3) for the first liquid in a horizontal longitudinal extent. The collection passage has an outlet side (4), a collection side (5) and at least one side wall (6) connecting the outlet side and the collection side. The side wall establishes a connection between the outlet side and a horizontal drip edge (7). This side wall has a shape and an inclination which enables the formation of a liquid film of the discrete liquid phase. For enhancing the stability of the Film, the side wall (6) can have a good wettability for the first liquid. The drip edge or the side wall preferably have a profiling, in particular a toothed arrangement (70) for the generation of the discrete phase in the form of drops which are preferably of an equal size due to a uniform toothed arrangement.

Classes IPC  ?

• B01D 17/04 - Rupture d'émulsions
• C10G 33/00 - Déshydratation ou désémulsification des huiles d'hydrocarbures

Abrégé

The apparatus (1) which combines a heat exchange between a liquid (8) and a heat transporting medium (7) with a static mixing of the liquid includes installed structures (2) in a jacket (3). The jacket extends longitudinally between a head end (4) and a base end (5). The installed structures form a heat exchanging and mixing structure. The heat transporting medium can be conveyed from the base end to the head end as an inner flow in tubes (21, 22) of the installed structures. The liquid can be conveyed from the head end to the base end as an outer flow. Reinforcement elements (6, 6', 6") are provided which stabilise the installed structures in the longitudinal direction against pressure gradients generated by the liquid. The installed structures are connected by the reinforcement elements to form a non-expandable part structure (2a) in a main region; they remain at least partly non-reinforced as a longitudinally expandable part structure (2b) and in a secondary region complementary to the main region.

Classes IPC  ?

• F28D 7/08 - Appareils échangeurs de chaleur comportant des ensembles de canalisations tubulaires fixes pour les deux sources de potentiel calorifique, ces sources étant en contact chacune avec un côté de la paroi d'une canalisation les canalisations ayant une autre courbure, p.ex. en serpentins ou en zigzag
• F28F 9/013 - Supports auxiliaires pour les éléments pour les tubes ou les assemblages de tubes

Abrégé

This invention relates to a method and a device for purifying and/ or separating preferably high melting organic raw products or compound mixtures containing, in particular, high melting and/ or degradable sterols, by layer crystallisation on first heat exchanger surfaces. The raw product is received in a solvent or solvent mixture, and then brought into contact with heat exchanger surfaces. The desired product crystallises on the heat exchanger surfaces by slow cooling. Solvent evaporating during the crystallisation or sweating process is condensed and returned to the mixture.

Classes IPC  ?

• B01D 9/00 - Cristallisation

Abrégé

A method for the manufacture of expandable granulate is disclosed. The method includes impregnation of a plastic melt using a fluid expanding agent and granulation of the impregnated melt by means of a plant. The plant includes at least one pressure- producing feed apparatus, a metering apparatus, contacting and homogenising apparatus, at least one cooler, an underwater granulator and a plant control. The granulation is carried out using a liquid which is used in the underwater granulator as a cooling and transport medium for the granulate. A blowing action of the expanding agent is at least partly suppressed and regulation of the parameters to be set for the granulation is effected using the plant control. Measurements of the parameters are made and compared with desired values, and deviations are used by the plant control to influence a heat take-up from the impregnated melt by the at least one cooler.

Classes IPC  ?

• B29B 9/10 - Fabrication de granulés par moulage de matière, c. à d. par traitement en état de fusion

Abrégé

The fluid inlet device (1) is provided for an apparatus (10), in particular for a column (10'). An inflow stub (2) at a wall (11) of the apparatus serves for the supply of a fluid which can be single phase or multi-phase. A distribution chamber (3) adjoins downstream of the inflow stub. Guide lamellae (4) are arranged at at least one open side of this chamber by means of which a fluid (2a) to be fed into the apparatus can be distributed, guided on curved paths, over a surface of the apparatus. In the case of a two-phase fluid, a dispersed phase of higher density can be at least partly separated at the same time as the distribution using centrifugal forces. Wall panels (5, 6) of closed sides of the distribution chamber, in particular a base panel and a top panel together with guide lamellae secured to them result in a construction of stable shape. Every guide lamella is connected to the wall panels at side edges via plug connections providing a form fitted connection. The stability of the construction is established by fixing to single or all plug connections by means of additional connection means.

Classes IPC  ?

• B01J 4/00 - Dispositifs d'alimentation; Dispositifs de commande d'alimentation ou d'évacuation
• B01D 3/00 - Distillation ou procédés d'échange apparentés dans lesquels des liquides sont en contact avec des milieux gazeux, p.ex. extraction
• B01J 19/24 - Réacteurs fixes sans élément interne mobile
• F16B 5/00 - Jonction de feuilles ou de plaques soit entre elles soit à des bandes ou barres parallèles à elles
• F16B 5/08 - Jonction de feuilles ou de plaques soit entre elles soit à des bandes ou barres parallèles à elles par soudage ou procédés similaires