Method for extracting rhenium and tungsten from wastes of rheniu

Details Method for extracting rhenium and tungsten from wastes of rheniu Method for extracting rhenium and tungsten from wastes of rheniu

1980-01-16

1981-07-14

Carter, Herbert T.

Chemistry of inorganic compounds

Treating mixture to obtain metal containing compound

Group viib metal

423 54, 423DIG14, 204105R, 75101BE, C01G 4100, C01G 4700

Patent

active

042786410

ABSTRACT:
Rhenium and tungsten are recovered from a rhenium tungsten alloy by electrochemically dissolving the alloy in substantially 4 to 5 normal sodium hydroxide to form a rhenium-containing solution, solvent extracting the rhenium-containing solution with an organic heteroatom-containing solvent (e.g. pyridine) or acetone to form a second solution of the solvent containing rhenium, distilling the solvent from the second solution to form a raffinate containing rhenium, adding sulfuric acid to the raffinate to adjust the pH thereof to about 1, extracting tungsten from the raffinate with a solution of trioctylamine in kerosene containing octyl alcohol, and subjecting the raffinate containing sodium perrhenate to ion exchange to eventually convert it to ammonium perrhenate.

REFERENCES:
patent: 3158438 (1964-11-01), Kurtak
patent: 3558268 (1971-01-01), Prater et al.
patent: 3681016 (1972-08-01), Litz
patent: 3733388 (1973-05-01), Ziegler
Huffman et al., "J. Inorg. Nucl. Chem." vol. 3, Aug., 1956, pp. 49-53.
Goishi et al., "J. of American Chemical Soc.", vol. 74, 1952, p. 6109.

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