B - Operations – Transporting – 01 – D
Patent
B - Operations, Transporting
01
D
182/15.3, 117/88
B01D 69/12 (2006.01) B01D 71/44 (2006.01) B01D 71/60 (2006.01) C08G 85/00 (2006.01)
Patent
CA 1145208
ABSTRACT OF THE DISCLOSURE A semipermeable composite membrane comprising a thin semipermeable film of a polymeric material deposited on one side of a microporous substrate, said polymeric material being prepared by crosslinking a soluble polymer containing at least 30 mole% of a recurring unit of the formula Image wherein all symbols are as defined in Claim 1, and having at least 0.2 milliequivalent, per gram of said polymer, of an amino group containing 1 or 2 active hydrogen atoms, with a polyfunctional compound containing at least two functional groups capable of reacting with the amino group having 1 or 2 active hydrogen atoms; and a process for preparing the same. The semipermeable com- posite membrane of this invention is especially useful for desalination of saline or brackish water by reverse osmosis.
335070
Hara Shigeyoshi
Hayashi Yuzuru
Kawaguchi Takeyuki
Minematsu Hiroyoshi
Sasaki Noriaki
Smart & Biggar
Teijin Limited
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