Semipermeable membranes of polyamides

Details Semipermeable membranes of polyamides Semipermeable membranes of polyamides

C - Chemistry, Metallurgy

08

J

402/225, 18/27

C08J 5/22 (2006.01) B01D 71/56 (2006.01) B01D 71/66 (2006.01) C08G 69/42 (2006.01)

Patent

CA 1104748

Abstract of the Disclosure The invention relates to membranes which consist of aromatic polyamides containing disulphimide groups and have relative viscosities ?rel of< 1.4, as measured on a 0.5 % N-methyl- pyrrolidone solution at 20°C, and which may be used for ultra- filtration and inverse osmosis. The membranes of these polyamides according to the invention have a high permeability to water, for example, a throughflow of 1000-5000 1/m2d under a pressure of 20 bars, and a high retention capacity for dissolved sub- stances.

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