Reclamation of molybdenum or other heavy metals from wastewater

Details Reclamation of molybdenum or other heavy metals from wastewater Reclamation of molybdenum or other heavy metals from wastewater

1979-02-27

1980-09-16

Hart, Charles N.

Chemistry of inorganic compounds

Treating mixture to obtain metal containing compound

Group vib metal

210688, 423 58, 423 87, 423150, 423146, C02B 120, C02C 300

Patent

active

042228727

ABSTRACT:
Molybdenum or other heavy metal anions and ferric sulfate are reclaimed from wastewater skimmings, that result from treatment of wastewaters through formation of insoluble heavy metal ferric salts and flotation, by treating the skimmings with aqueous caustic at 150.degree.-225.degree. F. to form a solution of the heavy metal anions and a residual solids fraction, separating the solids and contacting the residual solids with sulfuric acid to produce ferric sulfate.

REFERENCES:
patent: 1250063 (1917-12-01), Westling et al.
patent: 3268443 (1966-08-01), Cann
patent: 3347786 (1967-10-01), Baer et al.
patent: 3575853 (1971-04-01), Gaughan et al.
patent: 3725266 (1973-04-01), Haviland
patent: 4036941 (1977-07-01), Boyles et al.
Giannini et al., "Removal of Heavy Metals From Mining Tailings Wastewater By Electrocoagulation", presented at 3rd Annual Conference, New Advances in Liquid-Solid Separation, Separ/Expo III at Cherry Hill, N.J., Oct. 12, 1977.

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