Carbonate reduction

Details Carbonate reduction Carbonate reduction

1976-10-06

1977-09-20

Prescott, Arthur C.

Chemistry: electrical and wave energy

Processes and products

Electrostatic field or electrical discharge

204301, B01D 1302

Patent

active

040495191

ABSTRACT:
Reduction of carbonate concentrations in cyanide-containing electroplating baths and congeneric solutions using an electrolytic cell, equipped with cation permselective membranes, by the selective addition of hydrogen ions whereby the carbonate ions are converted, in sequence, to bicarbonate ions and then to carbonic acid which decomposes to water and carbon dioxide.

REFERENCES:
patent: 3344050 (1967-09-01), Mayland et al.
patent: 3761369 (1973-09-01), Tirrell
patent: 3896015 (1975-07-01), McRae
patent: 3901781 (1975-08-01), Passino et al.
patent: 3964985 (1976-06-01), Giuffrida
patent: 3968017 (1976-07-01), Canata et al.
"Cyanide Copper Plating," Plating Product Bulletin No. 41, Indust. Chem. Dept., Du Pont, Wilmington, Del. 19898.
Katz, "Electrodialysis Preparation of Boiler Feed and Other Demineralized Waters," (1971), Amer. Power Conference, vol. 33.
Hamilton et al., "Calculations of Analytical Chemistry," McGraw-Hill, New York, N.Y., (1947), pp. 199-205.
Ionics Bulletin L-2, "Stackpack", Ionics, Inc. Watertown, Mass., 1963.

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