Electrodialytic purification process

Details Electrodialytic purification process Electrodialytic purification process

1982-02-19

1984-03-27

Andrews, R. L.

Chemistry: electrical and wave energy

Processes and products

Electrostatic field or electrical discharge

204151, 204301, B01D 5702

Patent

active

044392931

ABSTRACT:
By using an aqueous solution of inorganic carbonate, bicarbonate and/or hydroxide as the catholyte in an electrodialysis process, acids containing a multivalent metal in the anion are prepared substantially free of anionic impurities, substantially pure electroplating-type acids with a multivalent metal in the anion such as chromic, molybdic and tungstic acids are prepared from salts of such acids and multivalent metal cations are separated from anions containing sulfur, phosphorus, halogen or carbon in aqueous solutions such as found in rinse waters from electroplating processes.

REFERENCES:
patent: 3788959 (1974-01-01), Smith
patent: 3926759 (1975-12-01), Horn et al.
patent: 3983016 (1976-09-01), Ellsworth et al.
patent: 4049519 (1977-09-01), Sloan
patent: 4057483 (1977-11-01), Giuffrida
patent: 4111772 (1978-09-01), Horn
patent: 4325792 (1982-04-01), Vaughan

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