Membrane and process for the production thereof

Details Membrane and process for the production thereof Membrane and process for the production thereof

1993-06-01

1995-03-28

Dawson, Robert A.

Liquid purification or separation

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Material

210490, 21050037, 21050039, 21050028, 264 48, 264 49, 4283044, 427245, B01D 3900

Patent

active

054014107

ABSTRACT:
Membranes composed of sulphonated polyaryl ether sulphones are disclosed in which the repetitive polymer units have the formula ##STR1## in which the aryl radicals are substituted by SO.sub.3 X where X is hydrogen or an alkali metal and the polymer includes from about 0.3 to 0.6 SO.sub.3 X radicals per unit. Processes for producing these membranes are also disclosed.

REFERENCES:
patent: 3855122 (1974-12-01), Dourganel
patent: 4054707 (1977-10-01), Quentin
patent: 4127481 (1978-11-01), Malchesky et al.
patent: 4565740 (1986-01-01), Golander et al.
patent: 4613665 (1986-09-01), Larm
patent: 5008352 (1991-04-01), Hendy
patent: 5246582 (1993-09-01), Sluma et al.
patent: 5279739 (1994-01-01), Pemawansa

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