Liquid-liquid extraction process for the recovery of tungsten fr

Details Liquid-liquid extraction process for the recovery of tungsten fr Liquid-liquid extraction process for the recovery of tungsten fr

1980-09-15

1981-07-21

Carter, Herbert T.

Chemistry of inorganic compounds

Treating mixture to obtain metal containing compound

Group vib metal

423DIG14, 75101BE, C01G 4100

Patent

active

042798701

ABSTRACT:
A recyclable process for the recovery of tungsten from low level aqueous sources comprises adjustment of the pH of the source solution to a value below about pH 6, extraction of the tungsten values into an organic phase comprising a chelating agent, an organic transfer agent, and an inert organic solvent. Preferred chelating agents include vicinally disubstituted aromatic compounds in which the substituents are selected from amino, carboxyl, hydroxyl, and sulfhydryl.

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Flaschka et al., "Chelates in Anal. Chemistry," vol. 1, Marcel Dekku, Inc. N.Y., 1967, pp. 332-346.
Morrison et al., "Solvent Extraction in Anal. Chemistry," John Wiley & Sons, N.Y., 1957, pp. 21-30

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