Method for removal of sodium carbonate from cyanide plating bath

Details Method for removal of sodium carbonate from cyanide plating bath Method for removal of sodium carbonate from cyanide plating bath

1979-10-15

1981-07-14

Kaplan, G. L.

Chemistry: electrical and wave energy

Processes and products

204DIG13, 204 45R, 204274, 210737, B01D 902, C25D 2102

Patent

active

042785154

ABSTRACT:
The invention is an improved apparatus for the removal of sodium carbonate from cyanide plating baths. The method involves the precipitation of sodium carbonate by the effect of cooling the cyanide plating bath liquid. A container is submerged in the solution with the container opening extending above the plating bath solution level. The container is filled with dry ice and water which produces a temperature of approximately zero degrees centigrade inside of the container. The solution adjacent to the exterior of the container is cooled so that excess sodium carbonate is precipitated as a crystalline deposit. After a desired interval, the container is removed with the encrustation of sodium carbonate for disposal.

REFERENCES:
patent: 2073664 (1937-03-01), Weisberg et al.
patent: 2516105 (1950-07-01), Mateosian
patent: 3737384 (1973-06-01), Fletcher et al.
William Blum et al., "Principles of Electroplating and Electroforming", p. 86, (1949).

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