Semipermeable membranes based on polymers containing sulphonate

Details Semipermeable membranes based on polymers containing sulphonate Semipermeable membranes based on polymers containing sulphonate

1986-06-25

1988-08-23

Spear, Frank

Liquid purification or separation

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Material

B01D 1300

Patent

active

047658983

ABSTRACT:
Semipermeable membrane consisting of a polymer, embodying [--SO.sub.3 --] groups; said [--SO.sub.3 --] groups may be present in the continuous polymer chains or may be present in links between continuous polymer chains. The membrane may have been formed either by in situ coagulation of a polymer solution in the pores of a porous substrate or by interfacial crosslinking of a water-soluble phenolic polymer with a sulphonyl halide compound to form an [--SO.sub.3 --] groups embodying polymer in the pores of a substrate.

REFERENCES:
patent: 3658757 (1972-04-01), Conix et al.
patent: 4026977 (1977-05-01), Bourgaiyel
patent: 4067805 (1978-01-01), Chiang et al.

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