Chemistry of inorganic compounds – Treating mixture to obtain metal containing compound – Group vib metal
Patent
1982-05-21
1984-04-10
Carter, Herbert T.
Chemistry of inorganic compounds
Treating mixture to obtain metal containing compound
Group vib metal
423 55, 423 58, 423139, 423140, 204112, 75119, 75121, C01G 3714, C01G 5300
Patent
active
044420730
ABSTRACT:
A method for recovering superalloy scrap is disclosed. The method involves oxidizing superalloy scrap in an aqueous acidic medium. The aqueous acidic medium has an oxidation potential sufficient to oxidize nonferrous additive superalloy elements to insoluble oxides thereof and to oxidize major superalloy constituents to aqueously soluble species. The insoluble solids from the aqueous solution are separated when the aqueous solution is extracted with an aqueously substantially insoluble tertiary amine to form an organic phase and an aqueous phase. The aqueous phase contains essentially nickel and chromium values. The organic phase is sequentially extracted with aqueous solutions which selectively solubilize individual metal value species to form individual aqueous solutions having substantially single metal value species therein. The metal value species solutions are processed to obtain substantially pure metals.
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A. O. Ette, Masters thesis, "Recovery of Molybdenum from Superalloy Scraps and Waste Products", 1980, pp. 22-24, 101.
Ette Aniedi O.
Robinson Douglas J.
Carter Herbert T.
LaPierre John L.
University Patents Inc.
Valentine James C.
Williamson John K.
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