Process for recovering tungsten from alkaline leaching solution

Details Process for recovering tungsten from alkaline leaching solution Process for recovering tungsten from alkaline leaching solution

1975-02-20

1976-07-13

Carter, Herbert T.

Chemistry of inorganic compounds

Treating mixture to obtain metal containing compound

Group vib metal

423 55, 423593, 423561, C01G 3900, C01G 4100

Patent

active

039694844

ABSTRACT:
This invention relates to a process for recovering tungsten from an alkaline leaching solution of tungsten ores. This invention comprises adjusting the pH of an alkaline leaching solution which is obtained by lixiviating ore containing tungsten with an alkaline solution to 7-8 with acid to oxidize molybdic acid ions in the solution, adding a sulfide donor, then precipitating molybdenum sulfide compounds by adjusting the pH value of the solution to 2-3, and recovering tungstic acid ions as calcium tungstate by the addition of a calcium ion donor after the molybdenum sulfide compounds are separated.

REFERENCES:
patent: 2339888 (1944-01-01), Smith
patent: 2556255 (1951-06-01), Carosella
patent: 3158438 (1964-11-01), Kurtak
patent: 3173754 (1965-03-01), Kurtak

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