Composite membrane

Details Composite membrane Composite membrane

B - Operations, Transporting

01

D

18/16

B01D 69/12 (2006.01) B01D 71/56 (2006.01) C08G 69/26 (2006.01)

Patent

CA 1308528

TITLE COMPOSITE MEMBRANE ABSTRACT OF THE DISCLOSURE Composite reverse osmosis membranes are disclosed wherein a microporous support layer has superposed thereon an interfacially polymerized aromatic copolyamide. The aromatic copolyamide is derived from meta-phenylene diamine and, based on polymerized acid chloride present, 10 to 80% by weight repeating units derived from trimesoyl chloride, from 90 to 15% by weight repeating units derived from cyclohexane-1,3-5-tricarbonyl chloride and up to 40% by weight, repeating units derived from isophthaloyl chloride, terephthaloyl chloride or mixtures thereof. The membranes exhibit improved flux over similar membranes based on trimosoyl chloride while retaining similar salt rejection ability. The membranes containing the diacids exhibit improved flux over similar membranes based on the two triacid chlorides while retaining similar salt rejection ability.

535117

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