| Patents for B01D 69 - Semi-permeable membranes for separation processes or apparatus characterised by their form, structure or properties; Manufacturing processes specially adapted therefor (16,729) |
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| 07/10/1991 | EP0436288A2 Membrane system and process for concentrating organic oxygenates |
| 07/10/1991 | EP0436128A1 Composite membranes for separating water from organic compounds containing fluids |
| 07/10/1991 | CN1052797A Process for producing multilayer polytetrafluoroethylene porous memberane and semisintered polytetrafluoroethylene multilayer structure |
| 07/09/1991 | US5030355 Polyurethane and/or polyurea alloys; separating aromatics |
| 07/09/1991 | US5030350 Filter medium for cake-forming filtration processes |
| 07/09/1991 | CA1285732C Langmuir-blodgett ultrathin membrane of polyfumarate |
| 07/09/1991 | CA1285722C Reversed phase membranes |
| 07/03/1991 | CN1052618A Asymmetric semipermeable membrane for treatment of biological fluids |
| 07/03/1991 | CA2020533A1 Separation of compositions containing water and organic oxygenates |
| 07/02/1991 | US5028337 Coated membranes |
| 07/02/1991 | US5028336 Raising the pH to form an alkalized aqueous charge liquid containing dissolved electrolytes, filtering, recovering retentate |
| 07/02/1991 | US5028335 Crystal structure, ultrafiltration, biochemical immobilization, from Bacillus cells |
| 07/02/1991 | CA1285356C Multilayer composite hollow fibers and method of making same |
| 06/27/1991 | WO1991008829A1 New filter media for use in surgical and clean room masks |
| 06/27/1991 | WO1991008826A1 A method for drying of gases, especially compressed air, a membrane for carrying out said method and a process for the manufacturing of said membrane |
| 06/27/1991 | DE3942868A1 Verbundmembran, verfahren zu ihrer herstellung und ihre verwendung The composite membrane, process for their preparation and their use |
| 06/27/1991 | DE3942867A1 Composite membrane for sepn. of gas mixts. - has porous backing, gas-permeable interlayer and perm-selective layer of amphiphilic mols. contg. 1 or 2 7-20C alkyl gps. per polar gp. |
| 06/26/1991 | EP0434668A1 A membrane support means |
| 06/26/1991 | EP0433787A1 Process for producing multilayer polytetrafluoroethylene porous membrane |
| 06/26/1991 | CN1052434A Process for producing multilayer polytetrafluoroethylene porous membrane |
| 06/25/1991 | US5026591 Microporous matrix filled with thermo(plastic or setting) resin |
| 06/25/1991 | US5026342 Noningestible separation barrier with plugged pores |
| 06/24/1991 | WO1991009669A1 Composite diaphragm, process for producing it and its use |
| 06/24/1991 | CA2072016A1 Composite diaphragm, process for producing it and its use |
| 06/19/1991 | EP0207100B1 Process for changing the effective pore size of a structure |
| 06/19/1991 | CN1012879B Improved composite separation membranes and preparation and use thereof |
| 06/18/1991 | US5024765 Composite membranes and processes using them |
| 06/15/1991 | WO1991008828A1 Dry high flux semipermeable membranes |
| 06/13/1991 | WO1991008212A1 Mono-bino and di-bino oxodiaminodicyclophosphazene derivatives |
| 06/12/1991 | EP0431593A2 Separation method and separating agent |
| 06/11/1991 | US5023374 For strips or membranes used in determinations of lithium ion concentration in fluids |
| 06/08/1991 | CA2031599A1 Separation method and separating agent |
| 06/06/1991 | DE3939867A1 Composite membrane for sepn. of water from fluid mixts. - contg. organic components by pervaporation has sepn. layer of polyvinyl alcohol post- crosslinked by acid in vapour phase |
| 06/06/1991 | DE3939841A1 Composite membrane for sepn. of water from aq. amine solns. - has sepn. layer of polyvinyl alcohol post-crosslinked by acid in vapour phase |
| 06/05/1991 | EP0430082A2 Porous membrane formed from an interpenetrating polymer network having hydrophilic surface |
| 06/02/1991 | WO1991008043A1 Composite membrane for separating water from fluids containing organic compounds by pervaporation |
| 06/02/1991 | CA2046332A1 Composite membrane for separating water from fluids containing organic compounds by pervaporation |
| 05/29/1991 | CN1051681A Hardened gum formed-in-place membranes |
| 05/28/1991 | US5019264 Multilayer reverse osmosis membrane of polyamide-urea |
| 05/28/1991 | US5019261 Permeable, porous polymeric membrane with hydrophilic character methods for preparing said membranes and their use |
| 05/28/1991 | US5019140 Irradiated expanded polytetrafluoroethylene composites, and devices using them, and processes for making them |
| 05/22/1991 | EP0428083A2 Supported filtration membrane and method of manufacturing same |
| 05/22/1991 | EP0428052A2 Gas separation by adsorbent membranes |
| 05/22/1991 | EP0427897A1 Separation of gases |
| 05/22/1991 | EP0423249A4 Extrusion of hollow fibre membranes |
| 05/21/1991 | US5017292 Permselective |
| 05/15/1991 | EP0427452A2 Process for separating a charge containing dewaxing solvent and dewaxed oil |
| 05/15/1991 | EP0427338A1 Process for the separation of solvents from hydrocarbons dissolved in said solvents |
| 05/15/1991 | EP0427079A2 Semipermeable polyetherketone membrane |
| 05/15/1991 | EP0426686A1 Multifunctional thrombo-resistant coatings and methods of manufacture |
| 05/14/1991 | US5015387 Method for activating cellulosic membrane, activated cellulosic membrane, method of fixing physiologically active substance on the activated cellulosic membrane and physiologically active substance-fixed membrane |
| 05/14/1991 | US5015382 Microporous support layer with interfacially polymerized copolyamide membrane thereon |
| 05/14/1991 | US5015380 Microporous support layer with interfacially polymerized copolyamide membrane thereon |
| 05/14/1991 | US5015268 Polymeric membrane and process for separating aliphatically unsaturated hydrocarbons |
| 05/14/1991 | CA2028417A1 Reaction bonded silicon nitride filtration membranes |
| 05/11/1991 | CA2029567A1 Process for the separation of solvents from hydrocarbons dissolved in said solvents |
| 05/09/1991 | CA2029030A1 Process for treating a charge containing dewaxing solvent and dewaxed oil |
| 05/08/1991 | CA2029387A1 Semipermeable membrane made from polyether ketones |
| 05/07/1991 | US5013767 Membrane formind dope, aromatic polysulfone, solvent |
| 05/07/1991 | US5013448 Process for the preparation of chlorine-resistant polyester semipermeable membranes |
| 05/07/1991 | US5013338 Composite, silicon or germanium acetylenic polymer |
| 05/02/1991 | EP0425108A2 Dehydration of organic oxygenates |
| 05/02/1991 | DE4031120A1 Membrane micro-filters for treating liquids and/or gases - used in the form of particles, chips of fibre obtd. by disintegrating scrap material from prodn. of membrane micro-filters |
| 04/30/1991 | US5011518 Permselective membrane and process for producing the same |
| 04/30/1991 | CA1283582C Modified polymeric surfaces and process for preparing same |
| 04/24/1991 | EP0424118A2 Hardened saccharinic gum formed-in-place membranes |
| 04/24/1991 | EP0424004A1 Surfactant treatment of polyaramide gas separation membranes |
| 04/24/1991 | EP0423949A2 Membrane process for separation of organic liquids |
| 04/24/1991 | EP0423249A1 Extrusion of hollow fibre membranes. |
| 04/24/1991 | CN2075539U Mother baby super filter |
| 04/24/1991 | CN2075537U Composite membrane super-filter |
| 04/24/1991 | CA2026660A1 Dehydration of organic oxygenates |
| 04/23/1991 | US5009783 Curable blend of porous polysulfone support with layer of polyvinyl alcohol and polyacrylic acid |
| 04/17/1991 | EP0422884A1 Surfactant treatment of aromatic polyimide gas separation membranes |
| 04/17/1991 | EP0408688A4 Porous membranes |
| 04/17/1991 | CA2020532A1 Membrane process for separation of organic liquids |
| 04/11/1991 | CA2027021A1 Surfactant treatment of aromatic polyimide gas separation membranes |
| 04/11/1991 | CA2027005A1 Surfactant treatment of polyimide gas separation membranes |
| 04/10/1991 | EP0421916A2 Composite membranes and processes using them |
| 04/10/1991 | EP0421676A1 Interfacially polymerized membranes, and reverse osmosis separation of organic solvent solutions using them |
| 04/10/1991 | EP0420847A1 Membrane filtration apparatus and method of making a membrane filtration unit |
| 04/09/1991 | US5006576 Ion exchange membrane |
| 04/09/1991 | US5006287 Affinity membranes having pendant hydroxy groups and processes for the preparation and use thereof |
| 04/09/1991 | US5006256 Affinity membranes having pendant hydroxy groups and processes for the preparation and use thereof |
| 04/09/1991 | US5006247 Ultrafiltration |
| 04/09/1991 | US5006229 Method of manufacturing a unit assembly of filter membranes, a mold used in the method, and a product obtained from the method |
| 04/09/1991 | US5006187 Plugged microporous film |
| 04/07/1991 | CA2027114A1 Hydrophobic microporous membrane |
| 04/06/1991 | CA2026054A1 Interfacially polymerized membranes for the reverse osmosis separation of organic solvent solutions |
| 04/04/1991 | WO1991004223A1 Gas separation by semi-permeable membranes |
| 04/03/1991 | EP0420832A2 Asymmetric gas separation membranes having improved strength |
| 04/03/1991 | EP0420765A2 Blood plasma-separating membrane and blood plasma separator using the membrane |
| 04/03/1991 | EP0180599B1 High flux membrane |
| 04/02/1991 | US5004861 Process for pervaporization using membrane separating means |
| 04/02/1991 | US5004544 Reaction bonded silicon nitride filtration membranes |
| 03/28/1991 | CA2026242A1 Asymmetric gas separation membranes having improved strength |
| 03/27/1991 | EP0419396A1 Hydrophilic membrane for use in ultrafiltration and method of preparation |
| 03/27/1991 | EP0419346A2 Filter for purification of platelets |
| 03/27/1991 | EP0419007A1 Countercurrent dehydration by hollow fibers |
| 03/27/1991 | EP0418517A2 Separating membrane and separation method |