B - Operations – Transporting – 01 – D
Patent
B - Operations, Transporting
01
D
18/24
B01D 67/00 (2006.01) B01D 71/68 (2006.01)
Patent
CA 1313736
TITLE "A method of Manufacturing a Reverse Osmosis Membrane and the Membrane so Produced" INVENTORS Michael D. Guiver André Y. Tremblay Chung M. Tam ABSTRACT OF DISCLOSURE 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: Image (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.
601957
Guiver Michael D.
Tam Chung M.
Tremblay Andre Y.
Anderson J. Wayne
Guiver Michael D.
National Research Council Of Canada
Tam Chung M.
Tremblay Andre Y.
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