Process for the production of pure solutions of tungsten and mol

Details Process for the production of pure solutions of tungsten and mol Process for the production of pure solutions of tungsten and mol

1995-12-22

1997-10-14

Phasge, Aron S.

Electrolysis: processes, compositions used therein, and methods

Electrolytic synthesis

Preparing inorganic compound

205560, 205564, 205770, 423 55, 423 56, 423421, C22B 3434, C22B 3436

Patent

active

056768176

ABSTRACT:
Process for the production of pure tungsten and/or molybdenum solutions from sources, such as alkaline decomposition solutions, which are contaminated with tantalum, niobium, titanium, aluminium, tin, arsenic, phosphorus and/or silicon, by application of a three stage purification process of pH reduction, anion exchange and membrane electrolysis.

REFERENCES:
patent: 3947332 (1976-03-01), Vanderpool et al.
patent: 4654131 (1987-03-01), Verbaan
patent: 4975167 (1990-12-01), Vadasdi et al.
WPI/Derwent abstract of Russian Patent SU1836466 A3 to Kalkov, A., et al Aug. 1993.
WPI/Derwent abstract of Chinese patent CN1084575 A to Gong, B.; Mar. 1994.

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