Chemistry of inorganic compounds – Treating mixture to obtain metal containing compound – Group vib metal
Patent
1980-04-15
1982-03-16
Carter, Herbert T.
Chemistry of inorganic compounds
Treating mixture to obtain metal containing compound
Group vib metal
423 53, 423 55, 423 58, 423 61, 423 65, 423306, 423307, C01G 3700, C01G 3900, C01G 4100
Patent
active
043200940
ABSTRACT:
Alloy scrap containing refractory metals such as chromium, molybdenum, tungsten, vanadium, niobium and tantalum and base metals such as nickel, cobalt, copper and iron are treated to partition the refractory metal values from the base metal values without an energy intensive remelting step. The scrap in finely divided form is calcined in the presence of an oxygen containing gas and a member of a certain group of alkali metal salts at a temperature in the range of 800.degree. C. to 1150.degree. C. for 1/4 hour to four hours. This treatment converts the refractory metals to alkali metal molybdates, tungstates, chromates, vanadates, niobates and tantalates and the base metals to oxides. The calcined product may then be water leached to produce a substantially base metal-free liquor rich in refractory metal values. Both the refractory and the base metal values may be subsequently recovered by conventional hydrometallurgical techniques.
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Douglas Donald A.
Menashi Jameel
Rappas Alkis S.
Cabot Corporation
Carter Herbert T.
Dropkin Robert F.
Schuman Jack
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