Process for preparing a highly selective fluorinated anion excha

Details Process for preparing a highly selective fluorinated anion excha Process for preparing a highly selective fluorinated anion excha

1988-03-28

1990-02-13

Niebling, John F.

Chemistry: electrical and wave energy

Apparatus

Electrolytic

204301, 521 27, 521 32, 526248, B01D 1302, C08D 520, C08F22600

Patent

active

049004204

ABSTRACT:
A process for preparing an anion exchange membrane, which comprises subjecting a carboxylate membrane made of a copolymer having repeating units of the formula: ##STR1## wherein X is F or CF.sub.3, l is an integer of from 0 to 5, m is 0 or 1, n is an integer of from 1 to 5, and p/q is from 4 to 16, and R is an alkyl group, to an acid or base treatment, and then introducing anion exchange groups thereinto.

REFERENCES:
patent: 3985501 (1976-10-01), Grot
patent: 4082701 (1978-04-01), Fries et al.
patent: 4126588 (1978-11-01), Ukihashi et al.
patent: 4294943 (1981-10-01), Onoue et al.
patent: 4298699 (1981-11-01), Asawa et al.
patent: 4567206 (1986-01-01), Matsui et al.

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