Continuous method for reclaiming chromium hydroxide from spent c

Details Continuous method for reclaiming chromium hydroxide from spent c Continuous method for reclaiming chromium hydroxide from spent c

1973-06-20

1976-04-13

Guynn, Herbert B.

Bleaching and dyeing; fluid treatment and chemical modification

Treatment of hides, skins, feathers and animal tissues

Tanning

8 942, 210 70, 210 73S, 252 857, 423 55, 423607, C14C 306, C01G 3702

Patent

active

039501310

ABSTRACT:
A continuous method is provided for reclaiming chromium compounds which heretofore were discharged as industrial waste from chrome liquor tanneries. The method includes continuous agitation of chrome sludge along with continuous filtration and movement through successive filtering zones. This method is both economically attractive and vital from an ecological standpoint. The reclaimed chromium values are in condition for reconstitution into fresh chrome-tanning liquors.

REFERENCES:
hauck, Journal of the American Leather Chemists Association, Vol. 57, Oct. 1972, pp. 422-429.
Harnly, Journal of the American Leather Chemists Association, Vol. 46, 1951, pp. 170 and 171.

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