| Patents for B01D 71 - Semi-permeable membranes for separation processes or apparatus characterised by the material; Manufacturing processes specially adapted therefor (23,060) |
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| 09/20/1990 | WO1990010494A1 Chlorine-resistant semipermeable membranes |
| 09/19/1990 | EP0388330A1 Process for producing a semi-permeable membrane on a porous conductive support by electrophoresis |
| 09/19/1990 | EP0221959B1 Removing and recovering plant polyphenols |
| 09/18/1990 | US4957942 Coagulation of a mixture of aromatic polyester and polysulfone |
| 09/18/1990 | US4957817 Film, fiber, and microporous membranes of poly(etheretherketone)dissolved in high boiling point polar organic solvents |
| 09/18/1990 | US4957513 Polysulfone semipermeable membranes |
| 09/12/1990 | EP0386784A2 Permselective membrane and process for producing the same |
| 09/12/1990 | EP0386184A1 Gas separation membranes derived from polycarbonates, polyesters, and polyestercarbonates containing tetrafluorobisphenol f |
| 09/07/1990 | WO1990010025A1 Phenylated polyimides prepared from 3,6-diarylpyromellitic dianhydride and aromatic diamines |
| 09/06/1990 | CA2007273A1 "p-xylylenediamide/diimide composite ro membranes" |
| 09/05/1990 | EP0385240A1 Polyimide membrane having improved flux |
| 09/05/1990 | CN1009433B Anode aluminium oxide diaphragm and process for manufacturing same and its application |
| 09/05/1990 | CN1009430B Asymmetric gas sepn. membrane comprising aromatic polysulphone |
| 09/04/1990 | US4954388 Fabric reinforced composite membrane |
| 09/04/1990 | US4954256 Hydrophobic membranes |
| 09/04/1990 | US4954144 Polyimide membranes and their use for gas separation |
| 09/04/1990 | US4954143 Using a sulfonated polyarylsulfone or polyarylketone membrane |
| 08/29/1990 | CN1009335B Bipolar membranes and methods of making same |
| 08/28/1990 | US4952349 Macroporous polymeric membranes for the separation of polymers and a method of their application |
| 08/28/1990 | US4952319 Process for separating liquid mixture |
| 08/28/1990 | US4952318 Separations of oxygenates |
| 08/28/1990 | US4952220 Surface treatment using high energy electromagnetic radiation |
| 08/27/1990 | CA2010463A1 Polyimide membrane having improved flux |
| 08/25/1990 | CA2050348A1 Phenylated polyimides prepared from 3,6-diarylpyromellitic dianhydride and aromatic diamines |
| 08/23/1990 | WO1990009232A1 Polymer membranes based on polyvinylidene fluoride |
| 08/23/1990 | WO1990009231A1 Membranes |
| 08/23/1990 | WO1990009230A1 Composite membranes and method of making the same |
| 08/22/1990 | EP0383521A1 Method of making ultrafiltration polyimide membrane and its use for recovery of dewaxing aid |
| 08/22/1990 | CN1044768A Sintered coating for porous metallic filter surfaces |
| 08/21/1990 | US4950404 Reverse osmosis; water deslination |
| 08/21/1990 | US4950314 Crosslinked polyolefin or polyarylene oxide |
| 08/21/1990 | CA1272982A1 Method for the recovery of lithium from solutions by electrodialysis |
| 08/21/1990 | CA1272945A1 Semipermeable membrane support and process for preparation thereof |
| 08/16/1990 | EP0382440A1 Cation exchange membranes |
| 08/16/1990 | EP0382439A1 Anion exchange membranes |
| 08/16/1990 | EP0382356A2 Membranes |
| 08/16/1990 | EP0382009A1 Semi-permeable membrane made of an homogeneously mixed polymeric alloy |
| 08/16/1990 | EP0381812A1 Sintered coating for porous metallic filter surfaces |
| 08/16/1990 | CA2009184A1 Ultrafiltratioin polyimide membrane and its use for recovery of dewaxing aid |
| 08/14/1990 | US4948506 Physicochemically functional ultrathin films by interfacial polymerization |
| 08/14/1990 | US4948400 Aromatic polyimides |
| 08/09/1990 | WO1990008807A1 Porous substrates with a high concentration of amine groups |
| 08/09/1990 | WO1990008586A1 Deaerating film and deaerating method |
| 08/09/1990 | WO1990006846A3 Irradiated expanded polytetrafluoroethylene composites, and devices using them, and processes for making them |
| 08/08/1990 | EP0381477A2 Concentration of water-ketone composition |
| 08/08/1990 | EP0381476A2 Treatment of compositions containing water and organic oxygentates |
| 08/08/1990 | CN1044411A Continuous prepn. of ion exchange membrane used for different phase |
| 08/08/1990 | CA2009324A1 Anion exchange membranes |
| 08/08/1990 | CA2009323A1 Cation exchange membranes |
| 08/07/1990 | US4946870 Delivery systems for pharmaceutical or therapeutic actives |
| 08/07/1990 | US4946594 Crosslinked copolymers of aliphatic polyester diols and dianhydrides |
| 08/07/1990 | US4946592 Membrane filter |
| 08/03/1990 | WO1990008801A1 Highly air permeable expanded polytetrafluoroethylene membranes and process for making them |
| 08/01/1990 | EP0380424A1 Process for the concentration by pervaporation of an aqueous fluid containing volatile or carrier water vapour-distillable organic compounds |
| 08/01/1990 | CN1008971B Gas separations using membranes comprising perfluorinated polymers with ionomeric moieties |
| 08/01/1990 | CA2003677A1 Treatment of compositions containing water and organic oxygenates |
| 08/01/1990 | CA2003676A1 Concentration of water-ketone compositions |
| 07/31/1990 | US4944996 Porous mineral membrane sintered to carbon composite support; mechanical strength, bursting resistance, porosity |
| 07/31/1990 | US4944881 Liquid separation membrane for pervaporation |
| 07/31/1990 | US4944880 Polyimide/aliphatic polyester copolymers |
| 07/31/1990 | US4944879 Multilayer; overcoating with electron beam crosslinked polymer |
| 07/31/1990 | US4944777 Separating hydrogen from a mixture of substances |
| 07/31/1990 | US4944775 Preparation of poly(phenylene oxide) asymmetric gas separation membranes |
| 07/31/1990 | CA1272140A1 Separating hydrogen from a mixture of substances |
| 07/31/1990 | CA1272078A1 Composite membrane for use in gas separation |
| 07/26/1990 | CA2008502A1 Membranes |
| 07/25/1990 | EP0378684A1 Leucocyte-separating process |
| 07/24/1990 | US4943374 Spontaneously and completely wettable with water |
| 07/24/1990 | US4943373 Oxidation with potassium permanganate |
| 07/24/1990 | CA1271907A1 Hollow fiber membrane made by melt-spinning polyolefin/filler composition |
| 07/18/1990 | EP0378441A2 A polyvinylidene fluoride porous membrane and a method for producing the same |
| 07/18/1990 | CN1043949A Improved composite membrance of poly(methyl methacrylate) blends, their manufacture and their use |
| 07/18/1990 | CN1043885A Improved composite membranes, their manufacture and their use |
| 07/17/1990 | US4942205 Alpha-fluoroacrylic acid polymer and its use |
| 07/17/1990 | US4941976 Polyvinyl alcohol crosslinked with polyaldehyde, bonded to a porous layer of polysulfone on polyester backing |
| 07/17/1990 | US4941972 Chlorine-stable membrane compositions |
| 07/17/1990 | US4941893 Gas separation by semi-permeable membranes |
| 07/12/1990 | WO1990006169A3 Defect-free ultrahigh flux asymmetric membranes |
| 07/12/1990 | CA2045533A1 Stabilized microporous materials and hydrogel materials |
| 07/11/1990 | CN1043636A Porous membranes |
| 07/10/1990 | US4940525 Separators for electrolytic cells, films |
| 07/04/1990 | EP0376638A2 A degassing tube for solvents |
| 07/04/1990 | EP0376235A2 Semipermeable membranes based on specified 4,4'-(1H-alkylidene)bis[2,3,6-trialkylphenol] type polyesters |
| 07/04/1990 | EP0376234A2 Semipermeable membranes based on specified tetrabromobisphenol type polyesters |
| 07/04/1990 | EP0376069A2 Biocompatible dialysis membrane consisting of a mixed polysaccharide ester |
| 07/04/1990 | CN1043446A Polysulfone-titanium micro-porous complex ultrafilter membrane and its preparation |
| 07/03/1990 | US4939214 Film comprised of at least one monomolecular layer and process for its preparation using a higher alkyl amine |
| 07/03/1990 | US4939180 Process of producing a composite membrane |
| 07/03/1990 | US4938902 Process for producing aromatic imide polymer hollow filaments |
| 07/03/1990 | US4938872 Treatment for reverse osmosis membranes |
| 07/03/1990 | US4938870 Overlaying uniform microporous film; free of cracks and pinholes; filters |
| 07/03/1990 | US4938778 Composite hollow fiber type separation membranes processes for the preparation thereof and their use |
| 06/28/1990 | WO1990006846A2 Irradiated expanded polytetrafluoroethylene composites, and devices using them, and processes for making them |
| 06/28/1990 | WO1990006806A1 Heat resistant microporous material production and products |
| 06/27/1990 | EP0375096A2 Novel anion-exchange membrane |
| 06/27/1990 | EP0374615A2 Process for the separation of organometallic compounds and/or metal carbonyls from their solution in organic media |
| 06/27/1990 | EP0374605A1 Sterile hydrophobic polytetrafluoroethylene membrane laminate |
| 06/27/1990 | CA2006591A1 Semipermeable membranes bases on specified 4,4'-(1h-alkylidene) bis¬2,3,6,6-trialkylphenol| type polyesters |
| 06/27/1990 | CA2006588A1 Semipermeable membranes based on specified tetrabromobisphenol type polyesters |
| 06/21/1990 | DE3926411A1 Ceramic filter for liquids - obtd. by sintering porous sprayed granular material made from aluminium oxide, kaolin and talc |