Separation and recovery of reusable heavy metal hydroxides from

Details Separation and recovery of reusable heavy metal hydroxides from Separation and recovery of reusable heavy metal hydroxides from

1986-02-18

1987-07-14

Sadowski, David

Liquid purification or separation

Processes

Making an insoluble substance or accreting suspended...

210712, 210722, 210724, 210726, 210912, 210913, 204DIG13, C02F 162

Patent

active

046801260

ABSTRACT:
A method is disclosed for the elimination of hazardous metal wastewater and sludges by recovering the non-ferrous metals zinc, nickel, copper (II), cadmium or chromium (III) present in an aqueous sludge comprising mixed metal hydroxides by selectively precipitating the ferrous metal ions present while maintaining the non-ferrous metal ions in solution, isolating the precipitate and then precipitating the non-ferrous metal ions from solution.

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patent: 4338200 (1982-07-01), Zeijlstra
patent: 4343706 (1982-08-01), Erzel et al.
Kreye, William C. et al, Treatment of Zinc Plating and Oil Bearing Washer Wastewater, Proceedings of the 33rd Industrial Waste Conference, Purdue University, 1978, Ann Arbor Science Publishers Inc., 1979, pp. 155-159.

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