Method of producing acids and alkalis

Chemistry: electrical and wave energy – Processes and products – Electrostatic field or electrical discharge

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204 98, 204103, 204104, B01D 6144

Patent

active

054157510

ABSTRACT:
To reuse ashes that are left after burning components contained in a black liquor obtained by digesting wood chips in the step of producing kraft pulps. Acids and alkalis are produced by burning components contained in a black liquor obtained by digesting wood chips and by decomposing an aqueous solution of the thus obtained ashes through the electrodialysis by using a bipolar membrane and a cation-exchange membrane and/or an anion-exchange membrane.

REFERENCES:
patent: 2829095 (1958-04-01), Oda et al.
patent: 4740281 (1988-03-01), Chlanda et al.
patent: 5328563 (1994-07-01), Henricson
Aquatech Systems Brochure (1985) no month pp. 1-12.

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