Process for extracting tungsten or molybdenum from solution

Details Process for extracting tungsten or molybdenum from solution Process for extracting tungsten or molybdenum from solution

1980-12-09

1985-05-07

Carter, Herbert T.

Chemistry of inorganic compounds

Treating mixture to obtain metal containing compound

Group vib metal

423DIG14, 75101BE, 210684, C01G 3900, C01G 4100

Patent

active

045157561

ABSTRACT:
A process for the recovery of molybdenum and/or tungsten from a solution which comprises the steps of passing said solution through a packed column containing an adsorbent; adsorbing tungsten and/or molybdenum on said adsorbent; passing a solution depleted in tungsten and/or molybdenum from said column; passing a stripping solution through said column containing tungsten and/or molybdenum on said adsorbent to remove tungsten and/or molybdenum with said stripping solution; repeating the first four steps until the stripping solution contains at least about 1 gram per liter of tungsten and/or molybdenum; passing said solution containing at least about 1 gram of tungsten and/or molybdenum per liter into a recovery zone; adjusting the pH of said stripping solution containing at least about 1 gram per liter of tungsten and/or molybdenum to approximately 13.0 by addition of a strong acid and thereby raising the temperature of said solution at least about 10.degree. C.; adding a calcium ion-containing solution to said pH adjusted solution to precipitate calcium tungstate and/or calcium molybdate; and, recovering said tungsten and/or molybdenum as calcium tungstate and/or calcium molybdate.

REFERENCES:
patent: 3332737 (1967-07-01), Kraus
patent: 3804945 (1974-04-01), Scott et al.
patent: 3848049 (1974-11-01), Ronzio et al.
patent: 4278643 (1981-07-01), Natansohn et al.
patent: 4279869 (1981-07-01), Coulson

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