Method for producing an acid and/or alkali metal hydroxide

Details Method for producing an acid and/or alkali metal hydroxide Method for producing an acid and/or alkali metal hydroxide

1994-01-19

1995-03-14

Gorgos, Kathryn

Chemistry: electrical and wave energy

Processes and products

Electrostatic field or electrical discharge

2041825, 204296, 204301, B01D 6144

Patent

active

053974450

ABSTRACT:
A method for producing an acid and/or an alkali metal hydroxide, from a neutral salt by electrodialysis employing a bipolar membrane and an anion exchange membrane and/or a cation exchange membrane, wherein as the anion exchange membrane, an anion exchange membrane made of a polymer having repeating units of the formula: ##STR1## wherein each of R.sub.1, R.sub.2 and R.sub.3 is a hydrogen atom or an alkyl group having up to two carbon atoms, and having an ion-exchange capacity of from 1 to 5 meq/g dry resin, is used.

REFERENCES:
patent: 4626553 (1986-12-01), Hane et al.
patent: 4670146 (1987-06-01), Inoue et al.
patent: 5039382 (1991-08-01), Suzuki et al.
patent: 5045171 (1991-09-01), MacDonald
Chemie Ingenieur Technik, vol. 61, No. 5, May 1989, pp. 428-429, Srinivasan Sridhar, "Electrodialyse mit Bipolaren Membranen", & Chemie Ingenieur Technik NS 1758/89, Synopse 1958, pp. 1-29.
Patent Abstracts of Japan, vol. 11, No. 115 (C-415), Apr. 10, 1987, & JP-A-61 259 707, Nov. 18, 1986, Yamamoto Mitsugi, et al., "Separation Membrane for Pervaporation".

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