Ammonium hydroxide stripping of tungsten from organic solvents

Details Ammonium hydroxide stripping of tungsten from organic solvents Ammonium hydroxide stripping of tungsten from organic solvents

1982-07-21

1984-05-22

Carter, Herbert T.

Chemistry of inorganic compounds

Treating mixture to obtain metal containing compound

Group vib metal

423 53, 75101BE, C01G 4100

Patent

active

044501447

ABSTRACT:
A process for stripping tungsten values from a tungsten-bearing acidic liquid organic phase into a basic aqueous ammoniacal stripping solution comprises mixing the organic phase and the stripping solution with a high-shear mixing device to maximize the pH gradient between the organic phase and the aqueous solution whereby growth of any precipitated ammonium paratungstate crystals is minimized and the dissolution thereof is maximized and to strip the tungsten values from the organic phase into the stripping solution.

REFERENCES:
patent: 3158438 (1964-11-01), Kurtak et al.
patent: 4092400 (1978-05-01), Zbranek et al.
patent: 4148862 (1979-04-01), Fugleberg et al.
Yih & Wang, Tungsten: Sources, Metallurgy, Properties & Applications, (1979), p. 108.
Petrov, Maslenitskii, et al., "Using Amines to Extract Tungsten . . . ", Tsvetnye Metally, V. 11-19, (1970), pp. 45-56.
Parker, "Mixing . . . ", in Chemical Engineering, 71 (12), Jun. 8, 1964, pp. 165-220.

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