A reverse osmosis membrane comprises a support membrane which itself has properties of salt rejection laminated to a layer comprising a cross-linked optionally protected polyol. The support membrane may be a reverse osmosis membrane and the polyol may be polyvinyl alcohol. The membrane of the invention may be prepared by the following steps: a) coating the surface of a support membrane which itself has properties of salt rejection with a solution comprising a polyol; b) cross-linking the polyol, and c) as necessary polymerising and/or protecting the polyol.
申请公布号
WO9417905(A1)
申请公布日期
1994.08.18
申请号
WO1994GB00198
申请日期
1994.02.02
申请人
NORTH WEST WATER GROUP PLC.;COLQUHOUN, HOWARD, MATTHEW;WILLIAMS, PETER, JOHN;LEWIS, ANDREW, LENNARD