B - Operations – Transporting – 01 – D
Patent
B - Operations, Transporting
01
D
117/88.5
B01D 69/10 (2006.01) B01D 69/12 (2006.01) B01D 71/40 (2006.01) C08F 8/14 (2006.01) C08L 33/02 (2006.01) C08L 33/14 (2006.01)
Patent
CA 2014234
PROCESS FOR THE PREPARATION OF CHLORINE-RESISTANT POLYESTER SEMIPERMEABLE MEMBRANES ABSTRACT OF THE DISCLOSURE Semipermeable membranes comprising polyesters which are resistant to chlorine are prepared by casting on a porous support backing material either a solution comprising a blend of a polymeric hydroxyalkyl acrylate and a polymeric monocarboxylic acid, or a polymeric polycarboxylic acid, or a solution containing a prepolymer which has been formed by the reaction of a polymeric hydroxyalkyl acrylate with an acryloyl halide or an anhydride of a dicarboxylic acid. The porous support backing material is contacted with the solution at contacting conditions, following which the excess solution is removed and the solution-coated porous support backing material is then cured at curing conditions. This membrane will posses excellent characteristics of salt rejection and flux as well as being resistant to the action of chlorine which is present in water which is subjected to a desalination process.
Fluid Systems Corporation
Gowling Lafleur Henderson Llp
LandOfFree
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