Recovery of tungsten and molybdenum from sulfur-bearing material

Details Recovery of tungsten and molybdenum from sulfur-bearing material Recovery of tungsten and molybdenum from sulfur-bearing material

1983-12-01

1984-11-13

Carter, Herbert T.

Chemistry of inorganic compounds

Treating mixture to obtain metal containing compound

Group vib metal

423 53, 423 58, C01G 3900, C01G 4100

Patent

active

044825269

ABSTRACT:
Tungsten and molybdenum are recovered from sulfur bearing material such as sulfide sludges by a pollution free process in which the sulfur bearing material is heated with agitation in an aqueous solution of sodium carbonate to form water soluble molybdenum and tungsten compounds without forming any appreciable amount of water soluble sulfur compounds. The reaction mixture is oxidized to convert partially reduced tungsten values or molybdenum values to sodium tungstate and sodium molybdate respectively. The liquid phase containing tungsten and molybdenum is separated from the solid phase containing free sulfur.

REFERENCES:
patent: 3429693 (1969-02-01), Bauer et al.
patent: 3725524 (1973-04-01), Martin et al.
patent: 4320095 (1982-03-01), Queneau et al.
patent: 4320096 (1982-03-01), Queneau et al.

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