Porous polymeric membranes including HALAR® (poly(ethylene chlorotrifluoroethylene)) and related compounds and the methods of production thereof which avoid the use of toxic solvents. Preferred solvents, coating agents and pore forming agents are citric acid ethyl ester or glycerol triacetate. The m
Porous polymeric membranes including HALAR® (poly(ethylene chlorotrifluoroethylene)) and related compounds and the methods of production thereof which avoid the use of toxic solvents. Preferred solvents, coating agents and pore forming agents are citric acid ethyl ester or glycerol triacetate. The membranes may be in the form of a hollow fiber or flat sheet, and may include other agents to modify the properties of the membranes, such as the hydrophilic/hydrophilic balance. Leachable agents may also be incorporated into the membranes.
대표청구항▼
What is claimed is: 1. A method of forming a membrane comprising casting a membrane from a solution at a temperature greater than 200° C. consisting essentially of poly(ethylene chlorotrifluoroethylene) and at least one solvent selected from the group consisting of a compound according to formula I
What is claimed is: 1. A method of forming a membrane comprising casting a membrane from a solution at a temperature greater than 200° C. consisting essentially of poly(ethylene chlorotrifluoroethylene) and at least one solvent selected from the group consisting of a compound according to formula I and formula II: wherein R1, R2, and R3 are alkyl; R4 is selected from the group consisting of H, OH, OR5, OCOR5, an alkyl, and an alkoxy; and R5 is an alkyl. 2. The method of claim 1, wherein the solvent according to formula I is citric acid ethyl ether. 3. The method of claim 1, wherein the solvent according to formula II is glycerol triacetate. 4. The method of claim 1, further comprising inducing a phase separation of poly(ethylene chlorotrifluoroethylene) and the solvent. 5. The method of claim 4, further comprising contacting a first surface with a lumen forming fluid. 6. The method of claim 5, wherein the act of contacting a first surface with the lumen forming fluid comprises contacting the surface with diethylene glycol. 7. The method of claim 5, further comprising contacting a second surface with a coating fluid. 8. The method of claim 7, wherein the act of contacting the second surface with the coating fluid comprises contacting the surface with a fluid selected from the group consisting of glycerol triacetate, citric acid ethyl ester, diethylene glycol, and mixtures thereof. 9. The method of claim 4, further comprising removing the solvent from the membrane. 10. The method of claim 4 wherein R1, R2, and R3are selected from the group consisting of methyl, ethyl, propyl, butyl, pentyl, and hexyl. 11. A method of forming a hollow fiber membrane comprising: forming a blend at a temperature greater than 200° C. consisting essentially of poly(ethylene chlorotrifluoroethylene) and at least one solvent selected from the group consisting of a compound according to formula I and formula II: wherein R1, R2, and R3 are alkyl; R4 is selected from the group consisting of H, OH, OR5, OCOR5, an alkyl, and an alkoxy; and R5 is an alkyl; forming the blend into a hollow fiber shape; contacting a first surface of the hollow fiber shape with a lumen forming fluid; inducing a phase separation in the hollow fiber shape to form a hollow fiber membrane; and removing the compound according to formula I or formula II from the membrane. 12. The method of claim 11, wherein the solvent according to formula I is citric acid ethyl ether. 13. The method of claim 11, wherein the solvent according to formula II is glycerol triacetate. 14. The method of claim 11, wherein the blend comprises about 14-25% poly(ethylene chlorotrifluoroethylene). 15. The method of claim 11, further comprising an act of contacting a second surface of the hollow fiber shape with a coating fluid. 16. The method of claim 15, wherein the coating fluid is selected from the group consisting of glycerol triacetate, citric acid ethyl ester, diethylene glycol, and mixtures thereof. 17. The method of claim 11, wherein the lumen forming fluid comprises diethylene glycol. 18. The method of claim 11, wherein the blend further comprises a solid pore forming agent. 19. The method of claim 18, further comprising an act of removing the pore forming agent from the hollow fiber with a leachant. 20. The method of claim 19, wherein the leachant comprises a caustic solution. 21. The method of claim 18, wherein the pore forming agent is an inorganic solid with a particle size of less than 1 micron. 22. The method of claim 18, wherein the pore forming agent comprises silica. 23. The method of claim 22, further comprising an act of preparing from the blend, a dope comprising from about 3 weight percent to about 9 weight percent silica. 24. A method of preparing a porous polymeric material comprising: heating a mixture to a temperature greater than 200° C. to form a solution consisting essentially of poly(ethylene chlorotrifluoroethylene) and at least one solvent selected from the group consisting of a compound according to formula I and formula II: wherein R1, R2, and R3 are alkyl; R4 is selected from the group consisting of H, OH, OR5, OCOR5, an alkyl, and an alkoxy; and R5 is an alkyl; forming a polymer rich phase and a polymer lean phase, wherein the polymer rich phase and the polymer lean phase form a matrix; cooling the matrix to form a solid polymeric material; and removing the polymer lean phase from the solid polymeric material after cooling the matrix. 25. The method of claim 24, wherein R1, R2, and R3, are selected from the group consisting of methyl, ethyl, propyl, butyl, pentyl and hexyl.
Gilliland Ronnie E. (New Orleans LA) Maloney Daniel R. (Bartlesville OK), Apparatus and method for measuring relative permeability and capillary pressure of porous rock.
Zimmermann Heinz (Am Park 22 D-4156 Willich DEX) Manteuffel Hans J. M. (Am alten Broich 213A Langenfeld DEX), Apparatus and process for treating water.
Zipplies,Tilman; Hintzer,Klaus; Dadalas,Michael C.; Loehr,Gernot, Aqueous dispersions of polytetrafluoroethylene having a low amount of fluorinated surfactant.
Clampitt Richard L. (Bartlesville OK) Hessert James E. (Bartlesville OK), Aqueous gels for plugging fractures in subterranean formation and production of said aqueous gels.
Shippey Frank R. (Thousand Oaks CA) Vance Timothy C. (Los Angeles CA) Martin Fred E. (Newbury Park CA), Automatic flushing system for membrane separation machines such as reverse osmosis machines.
Mahendran Mailvaganam,CAX ; Deutschmann Ake Adolf,CAX ; Henshaw Wayne Jerald,CAX ; Behmann Henry,CAX, Baffle for conversion of fine bubbles to coarse while filtering with a vertical skein of hollow fibers.
Cote Pierre L. (Hamilton CAX) Maurion Roger P. (Burlington CAX) Lipski Christopher J. (Burlington CAX) Pedersen Steven K. (Burlington CAX), Cartridge of hybrid frameless arrays of hollow fiber membranes and module containing an assembly of cartridges.
Beck Thomas William,AUX ; Drummond Humphrey John Jardine,AUX ; Lee Matthew Brian,AUX ; Kopp Clint Virgil,AUX ; Johnson Warren Thomas,AUX, Cleaning of hollow fibre membranes.
Hildenbrand Karlheinz (Krefeld DEX) Dhein Rolf (Krefeld DEX) Meister Willi (Dormagen DEX) Nerger Dittmar (Krefeld DEX), Composite membranes, processes for their preparation and their use.
Ford Douglas L. (New South Wales AUX) Anderson Eric W. (New South Wales AUX) Kopp Clinton V. (New South Wales AUX), Concentration of solids in a suspension.
Kopp Clinton Virgil (Castle Hill AUX) Doig Ian Dracup (Rosville Chase AUX) Streeton Robert John William (Winchester GB2) Darzi Jalel Michel (Parramatta AUX), Concentration of solids in a suspension using hollow fibre membranes.
Chen Michael S. (Macungie PA) Greskovich Eugene J. (Allentown PA) Spector Marshall L. (Allentown PA), Control of activated sludge wastewater treating process for enhanced phosphorous removal.
Bandel Werner (Wuppertal DEX) Henne Werner (Wuppertal DEX) Dnweg Gustav (Wuppertal DEX), Dialysis membrane of cellulose in the shape of a hollow fiber, and process for the production thereof.
Sampson Richard L. (San Antonio TX) Sampson Allison H. (San Antonio TX), Electrolytic process and apparatus for the controlled oxidation of inorganic and organic species in aqueous solutions.
Karbachsch Massoud (Kreuznach DEX) Breitbach Peter P. (Bretzenheim DEX) Ruger Helmut (Pfaffen-Schwabenheim DEX), Filter element with regenerable bulk material filling and method for making same.
Beck Thomas William,AUX ; Drummond Humphrey John Jardine,AUX ; Maxwell Ian Andrew,AUX ; Johnson Warren Thomas,AUX ; Kensett-Smith Brett,AUX, Filtration monitoring and control system.
Mller Heinz-Joachim (Wrth am Main DEX) Sluma Heinz-Dieter (Grossostheim DEX) Eberhard Gnter (Erlenbach DEX) Spindler Ernst (Obernburg DEX) Krauss Lothar (Erlenbach DEX) Vlker Helmut (Klingenberg DEX), Flat or capillary membrane based on a homogeneous mixture of polyvinylidene fluoride and a second polymer which can be r.
Sartori Guido (Annandale NJ) Ho Win-Sow W. (Annandale NJ) Noone Robert E. (Neshanic Station NJ) Ballinger Bruce H. (Bloomsbury NJ), Fluorinated polyolefin membranes for aromatics/saturates separation.
Cote Pierre L. (Hamilto CAX) Smith Bradley M. (Mississauga CAX) Deutschmann Ake A. (Mississauga CAX) Rodrigues Carlos F. F. (Brampton CAX) Pedersen Steven K. (Burlington CAX), Frameless array of hollow fiber membranes and method of maintaining clean fiber surfaces while filtering a substrate to.
Cote Pierre L. (Hamilton CAX) Maurion Roger P. (Burlington CAX) Lipski Christopher J. (Hamilton CAX), Frameless array of hollow fiber membranes and module containing a stack of arrays.
Jordan,Edward John; Elefritz,Robert, Grease and scum removal in a filtration apparatus comprising a membrane bioreactor and a treatment vessel for digesting organic materials.
Daigger Glen T. (Englewood CO) Borberg James R. (Virginia Beach VA) Morales Liliana M. (Reston VA), High-rate biological waste water treatment process using activated sludge recycle.
Baudet Jacques (Roussillon FR) Rochet Michel (Bron FR) Salmon Michel (Mions FR) Vogt Bernard (Caluire FR), Hollow fiber assembly for use in fluid treatment apparatus.
Kopp Clinton V. (Castle Hill AUX) Roberts Dennis (Berowra Heights AUX) Biltoft Bruce G. (Annandale AUX) White Victor (Lane Cove AUX), Hollow fibre filter cartridge and header.
Kopp Clinton V. (Castle Hill AUX) Roberts Dennis (Berowra Heights AUX) White Victor (Lane Cove AUX) Biltoft Bruce G. (Annandale AUX), Hollow fibre filter cartridge and header.
Butler Mark D. ; Davidson Daniel F. ; Mish Stanley L. ; Moore ; III James W., Implantable containment apparatus for a therapeutical device and method for loading and reloading the device therein.
Cote Pierre (Maisons-Laffitte FRX) Faivre Michel (Acheres FRX) Moulin Catherine (Paris FRX) Desbos Gilbert (Maisons-Laffitte FRX), Installation for making water potable with submerged filtering membranes.
Parsi Edgardo J. (Lexington MA) Sims Keith J. (Framingham MA) Elyanow Irving D. (Somerville MA) Prato Thomas A. (Cambridge MA), Introducing and removing ion-exchange and other particulates from an assembled electrodeionization stack.
Beck Henry N. (Walnut Creek CA) Mahoney Robert D. (Danville CA) Wan Hawk S. (Antioch CA) Lundgard Richard A. (Antioch CA), Isotropic microporous syndiotactic polystyrene membranes and processes for preparing the same.
Cho,Jin Woo; Ahn,Kyu Hong; Song,Kyung Guen; Poo,Kyung Min, Membrane coupled activated sludge method and apparatus operating anoxic/anaerobic process alternately for removal of nitrogen and phosphorous.
Karbachsch Massoud (Gottingen DEX) Kaul Wilfried (Weinsheim DEX) Strohm Gerhard (Oestrich-Winkel DEX), Membrane filtering device for micro and ultra filtration of fluids by the crossflow method.
De Moel, Petrus Jacob; Van Der Meer, Walterus Gijsberrus Joseph; Van Dalfsen, Harm, Method and apparatus for removing floating substances and salts from a liquid by means of a membrane filtration.
Heil Richard W. (30 Arthur Ave. Clarendon Hills IL 60514) Rose Thomas A. (351 South Waiola Ave. La Grange IL 60525), Method and apparatus for treating organic wastewater.
Seifter Eli (New Hyde Park NY) Padawer Jacques (Hastings-On-Hudson NY) Lalezari Iraj (Scarsdale NY), Method and system for removing impurities from aliments.
Effenberger John A. (Bedford NH) Koerber Keith G. (Goffstown NH) Latorra Michael N. (North Palm Beach FL) Petriello John V. (Palm Beach Gardens FL), Method for manufacturing of cast films at high productivity.
Daigger, Glen T.; Fleischer, Edwin J.; Wollmann, Albert M., Method for treating wastewater in a membrane bioreactor to produce a low phosphorus effluent.
Anselme Christophe (Le Pecq FRX) Daniel Loic (Rueil-Malmaison FRX), Method of changing operating modes in automatic water filtering apparatus using tubular membranes.
Mahendran Mailvaganam,CAX ; Goodboy Kenneth Paul ; Bai Jinhua,CAX, Method of making a dope comprising hydrophilized PVDF and .alpha.-alumina, and a membrane made therefrom.
Leysen Roger F. R. (Mol BEX) Vermeiren Philippe (Wemmel BEX) Baetsle Leon H. J. M. (Mol BEX) Spaepen Gustaaf J. F. (Dessel BEX) Vandenborre Jan-Baptist H. (Kasterlee BEX), Method of preparing a membrane consisting of polyantimonic acid powder and an organic binder.
Newberth ; III Frederick F. (Hartford CT) Henrikson Albert J. (Meriden CT) Joffee Lawrence B. (Seymour CT) Artavanis-Tsakonas Calliope (Hamden CT) Welch ; II Edward K. (Bristol CT), Method of treating (meth)acrylic monomer-containing wastewater.
Espenan Jean-Michel (Chateau FRX) Saux Franck (Ste Foix D\Aigrefeuille FRX), Method using separation membranes to treat a fluid containing matter in suspension and in solution.
Lee,William; Morgan,Jeffrey R.; Yarmush,Martin L., Methods for removal, purification, and concentration of viruses and methods of therapy based thereupon.
James L. Gaddy ; Edgar C. Clausen ; Ching-Whan Ko ; Leslie E. Wade ; Carl V. Wikstrom, Microbial process for the preparation of acetic acid as well as solvent for its extraction from the fermentation broth.
Park George B. (Wiltshire) Cook John A. (Oxfordshire) Dorling Mike G. L. (Wiltshire) Barker David J. (Oxford) McLoughlin Robert H. (Wiltshire GB2), Microporous films.
Breant Patrice,FRX ; Bouilloux Alain,FRX, Mixtures of polymers including a halogen-containing polymer and compatibilized with a grafted aliphatic polyester.
Selbie Michael R. L. (McMahons Point AUX) Biltoft Bruce G. (North Sydney AUX) Guilfoyle Philip (Lavendar Bay AUX) Wood Noel S. D. (Lindfield AUX), Modular microporous filter assemblies.
Grobe Anneliese (Esslingen DEX) Chmiel Horst (Leonberg DEX), Polymer membranes on the basis of polyvinylidene fluoride, a process for the production thereof and their use.
Kawai Takashi (Otsu JPX) Katsu Tomoko (Otsu JPX) Yoshioka Toshio (Otsu JPX), Polytetrafluoroethylene resin porous membrane, separator making use of the porous membrane and methods of producing the.
Kawai Takashi (Otsu JPX) Katsu Tomoko (Otsu JPX) Yoshioka Toshio (Otsu JPX), Polytetrafluoroethylene resin porous membrane, separator making use of the porous membrane and methods of producing the.
Allegrezza ; Jr. Anthony E. (Milford MA) Bellantoni Ellen C. (Framingham MA), Porous membrane formed from interpenetrating polymer network having hydrophilic surface.
Allegrezza ; Jr. Anthony E. (Milford MA) Bellantoni Ellen C. (Framingham MA), Porous membrane formed from interpenetrating polymer network having hydrophilic surface.
Mahendran Mailvaganam,CAX ; Deutschmann Ake Adolf,CAX ; Henshaw Wayne Jerald,CAX ; Behmann Henry,CAX, Potted header for hollow fiber membranes and method for making it.
Karachevtcev Vyacheslav Grigorievich,RUX ; Dubjaga Vladimir Pavlovich,RUX ; Amelina Natalia Vladimirovna,RUX ; Tarasov Aleksandr Valentinovich,RUX, Pourous fluorocarbon membrane, method for producing thereof and cartridge filter based on said membrane.
Applegate Lynn E. (Wilmington DE) Erkenbrecher ; Jr. Carl W. (Elkton MD) Winters Harvey (Pompton Lakes NJ), Prevention of biofouling of reverse osmosis membranes.
Kunz Gerhard (Ruhrstrasse 111 D-5628 Heiligenhaus DEX), Process and apparatus for treatment of fluids, particularly demineralization of aqueous solutions.
Kunz Gerhard (Ruhrstrasse 111 D-5628 Heiligenhaus DEX), Process and apparatus for treatment of fluids, particularly desalinization of aqueous solutions.
Yankowsky Anthony W. (Fort Mill SC) Stanhope Harry W. (Charlotte NC) Hicks Darrell D. (Jeffersontown KY), Process for bonding polyester reinforcement elements to rubber.
Kafchinski Edward R. (Winfield NJ) Chung Tai-Shung (Randolph NJ) Bader Hubert (Charlotte NC) Lowery James J. (Charlotte NC), Process for formation of halogenated polymeric microporous membranes having improved strength properties.
Roesink Hendrik D. W. (Hengelo NLX) Koenhen Dirk M. (Dedemsvaart NLX) Mulder Marcellinus H. V. (Enschede NLX) Smolders Cornelis A. (Hengelo NLX), Process for preparing a microporous membrane and such a membrane.
Gerigk Markus (Kln DEX) Brck Jochen (Kln DEX) Hovestadt Wieland (Krefeld DEX), Process for reconcentrating overspray from one-component coating compositions.
Filson James L. (Rockford IL) Bhave Ramesh R. (Cranberry Township ; Butler County PA) Morgart James R. (Stillman Valley Township ; Ogle County IL) Graaskamp James M. (Machesney Park IL), Pyrogens separations by ceramic ultrafiltration.
Detering Juergen (Mannheim DEX) Sanner Axel (Frankenthal DEX) Fussnegger Bernhard (Kirrweiler DEX), Removal of heavy metal ions from wine and wine-like beverages.
Davis Thomas E. (Lafayette CA) Schmidt Donald L. (Midland MI) Kau Jee I. (Concord CA) Wessling Ritchie A. (Midland MI) Whipple Sharon S. (Sanford MI) Fibiger Richard F. (Midland MI) Pickelman Dale M., Semi-permeable membranes prepared via reaction of cationic groups with nucleophilic groups.
Chiolle Antonio (44 ; Via V. Leati Ferrara ITX) Gianotti Giuseppe (20 ; Via Rosmini Novara ITX) Parrini Gianfranco (46/9 ; Via della Moscova Milan ITX), Supported anisotropic reverse osmosis membranes based on synthetic polyamides and processes for their preparation.
Del Vecchio, Michael Arthur; Loudon, Robert Eben; Sutton, Paul Matthew, System and method for withdrawing permeate through a filter and for cleaning the filter in situ.
Mahendran Mailvaganam (Hamilton CAX) Rodrigues Carlos Fernando F. (Brampton CAX) Pedersen Steven Kristian (Burlington CAX), Vertical skein of hollow fiber membranes and method of maintaining clean fiber surfaces while filtering a substrate to w.
Gaid,Abdelkader; Uyttewaal,Mickael; Tazi Pain,Annie, Water treatment method using an inorganic powder reagent with high specific surface area including a step of recycling said reagent.
Rogers, Peter; Bowmer, Stephen; Biltoft, Bruce Gregory; Polson, James W.; McMahon, Robert James; Lazaredes, Huw Alexander; Collignon, Michael, Frame system for membrane filtration modules.
Rogers, Peter; Bowmer, Stephen; Biltoft, Bruce Gregory; Polson, James W.; McMahon, Robert James; Lazaredes, Huw Alexander; Collignon, Michael, Frame system for membrane filtration modules.
Ku, Anthony Yu-Chung; McEvoy, Kevin Paul; Willson, Patrick Daniel; Kulkarni, Parag Parkash; Shisler, Roger Allen; Kurup, Anoop Muralidhara, Hybrid multichannel porous structure for hydrogen separation.
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