Bipolar membrane stack and method for production of low chloride

Details Bipolar membrane stack and method for production of low chloride Bipolar membrane stack and method for production of low chloride

1991-03-11

1993-05-04

Niebling, John

Chemistry: electrical and wave energy

Processes and products

Electrostatic field or electrical discharge

204 98, 204103, 2041825, 204301, B01D 6100

Patent

active

052078795

ABSTRACT:
A method and bipolar membrane stack for the generation of acid and base solutions from a salt by electrodialysis. The unit cells of the stack comprise a novel arrangement of membranes which provide four liquid flow channels. One of the channels has circulating therein a multivalent acid solution which acts as a buffer and presents leakage of the salt anion through the bipolar membrane, thereby producing base solution of substantially reduced salt-anion contamination. The method can be operated on a continuous basis.

REFERENCES:
patent: 4024043 (1977-05-01), Dege et al.
patent: 4536269 (1985-08-01), Chlanda et al.
patent: 4880513 (1989-11-01), Davis et al.

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