基本信息:
- 专利标题： METHOD OF MANUFACTURING A REVERSE OSMOSIS MEMBRANE AND THE MEMBRANE SO PRODUCED
- 申请号：CA601957 申请日：1989-06-06
- 公开(公告)号：CA1313736C 公开(公告)日：1993-02-23
- 发明人： GUIVER MICHAEL D , TREMBLAY ANDRE Y , TAM CHUNG M
- 申请人： GUIVER MICHAEL D
- 专利权人： GUIVER MICHAEL D
- 当前专利权人： GUIVER MICHAEL D
- 优先权： CA601957 1989-06-06
- 主分类号： B01D71/68
- IPC分类号： B01D71/68 ; B01D67/00
摘要：
TITLE "A method of Manufacturing a Reverse Osmosis Membrane and the Membrane so Produced" INVENTORS Michael D. Guiver André Y. Tremblay Chung M. Tam Reverse osmosis membranes are manufactured by casting a polysulfone casting composition comprising: i) an aromatic polysulfone derivative having repeat units, at least an average of about 20% of which are carboxylated and are of the formula I: (I) ,wherein each R in each formula is ortho to the sulfone, at least one R in each formula is a carboxyl group with any remainder thereof being hydrogen, and ii) a solvent for the aromatic polysulfone derivative, then evaporating solvent from the casting composition and then gelling the casting composition into a reverse osmosis membrane. The permeability of the reverse osmosis membrane may be increased by the addition of a non-solvent for the aromatic polysulfone derivative to the casting composition.