B - Operations – Transporting – 01 – D
Patent
B - Operations, Transporting
01
D
B01D 71/68 (2006.01) B01D 67/00 (2006.01) B01D 69/08 (2006.01) C08L 71/02 (2006.01) C08L 81/06 (2006.01)
Patent
CA 2272364
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, .delta.-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.
L'invention concerne, en premier lieu, une composition qui permet de fabriquer une membrane semi-perméable homogène. Ladite composition comprend (1) un composé polysulfone, (2) un solvant, tel que sulfolane, antipyrine, .delta.-valérolactam, diéthyl phtalate et des mélanges de ces produits, et (3) une substance non solvante, telle que poly(éthylène glycol), di(éthylène glycol), tri(éthylène glycol), glycérol et des mélanges de ces produits. Selon un autre aspect, la présente invention concerne des procédés permettant de fabriquer des membranes semi-perméables en mélangeant de façon homogène la composition de composé polysulfone, le solvant et la substance non solvante, en faisant fondre ladite composition et en filant par fusion la composition fondue. Selon un autre aspect encore, la présente invention concerne des membranes semi-perméables, homogènes et filées par fusion, particulièrement utiles pour les procédés de séparation de liquide, tels que, mais pas exclusivement, la microfiltration, l'ultrafiltration, la dialyse et l'osmose inverse.
Chiang Chung-Yuan
Jaanine Hamid
Meluch Timothy B.
Nguyen Thanh
Radovich John M.
Althin Medical Inc.
Baxter International Inc.
Sim & Mcburney
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