Hydrometallurgical process for treating mercury contaminated mud

Details Hydrometallurgical process for treating mercury contaminated mud Hydrometallurgical process for treating mercury contaminated mud

1992-04-28

1993-05-11

Rosenberg, Peter D.

Specialized metallurgical processes, compositions for use therei

Processes

Free metal or alloy reductant contains magnesium

C22B 4300

Patent

active

052097749

ABSTRACT:
This invention relates to a hydrometallurgical process for the treatment of mercury contaminated muds. More particularly, this process pertains to a hydrometallurgical process for the treatment of Environmental Protection Agency designated K106 muds discharged from a mercury chlor-alkali plant. A hydrometallurgical process for the treatment of mercury containing solids comprising: (a) treating the solids in a first leach with acid and sodium hypochlorite to produce a leached product; (b) transferring the product from the first leach to a first washing thickener and thickening the leached product from the first leach; (c) transferring the underflow from the wash thickener to a second leach and treating the underflow product with acid and sodium hypochlorite to yield a second leached product; (d) transferring the product from the second leach to a second washing thickener and thickening the leached product from the second leach; and (e) transferring the product from the second wash thickener to a final dewatering process to yield a low mercury content.

REFERENCES:
patent: 3639118 (1972-02-01), O'Grady
patent: 5013358 (1991-05-01), Ball et al.

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