Other

Baxter International Inc.

Lalith K Silva

Thanh Van Nguyen

George Washington

John M Radovich

Kees Ruzius

Timothy B Meluch

Chung-Yuan Chiang

Hamid Jaanine

Elias Klein

The present invention discloses, inter alia, a composition useful for producing a hemogeneous, semipermeable membrane, the composition comprising (1) a polysulfone compounds, (2) a solvent, such as sulfolane, antypyrine, &#x3b4;valerolactam, diethyl phthalate, and mixtures thereof, and (3) a non-solvent, such as poly(ethylene glycol), di(ethylene glycol), tri(ethylene glycol), glycerol, and mixtures thereof. Another aspect of this invention discloses methods for fabricating semipermeable membranes by homogeneously mixing the composition of the polysulfone compound, solvent, and non-solvent, melting the composition, and melt-spinning the molten composition. Another aspect of the present invention includes homogeneous, melt-spun, semipermeable membranes useful for liquid separation processes, such as, but not limited to, microfiltration, ultrafiltration, dialysis, and reverse osmosis.

Melt-spun polysulfone semipermeable membranes and methods for making the same

The present invention discloses, inter alia, a composition useful for producing a homogeneous, semipermeable membrane, the composition comprising (1) a polysulfone compound, (2) a solvent, such as sulfolane, antypyrine, &dgr;-valerolactam, diethyl phthalate, and mixtures thereof, and (3) a non-solvent, such as poly(ethylene glycol), di(ethylene glycol), tri(ethylene glycol), glycerol, and mixtures thereof. Another aspect of this invention discloses methods for fabricating semipermeable membranes by homogeneously mixing the composition of the polysulfone compound, solvent, and non-solvent, melting the composition, and melt-spinning the molten composition. Another aspect of the present invention includes homogeneous, melt-spun, semipermeable membranes useful for liquid separation processes, such as, but not limited to, microfiltration, ultrafiltration, dialysis, and reverse osmosis.

Hydrophilic semipermeable membranes based on copolymers of acrylonitrile and hydroxy-C.sub.2 -C.sub.4 -alkyl esters of (meth)acrylic acid are provided. The membranes have a substantial water regain at equilibrium, a wide range of ultrafiltration rates, and low solute adsorption by ion-exchange or hydrophobic interaction mechanisms. The membranes are particularly suitable for processing protein containing fluids, especially biological fluids such as blood or plasmas.

Hydrophilic semipermeable membranes based on copolymers of acrylonitrile

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Chamblee, GA, United States of America

Lalith K Silva