Preparation of heteropoly acids of tungsten and molybdenum

Details Preparation of heteropoly acids of tungsten and molybdenum Preparation of heteropoly acids of tungsten and molybdenum

1974-06-07

1976-03-30

Edmundson, F. C.

Chemistry: electrical and wave energy

Processes and products

204 89, 204 90, 204 94, 423307, 423326, C25B 122, C25B 124, C01G 3900, C01G 4100

Patent

active

039473325

ABSTRACT:
Heteropoly acids of tungsten and molybdenum, such as tungstosilicic acid and molybdosilicic acid, are produced by first preparing an aqueous solution of an alkali metal tungstate or molybdate and an alkali metal salt of the hetero atom, and then removing the alkali metal cations from the solution by means of a cation exchange membrane under the influence of an applied electrical potential, whereby the reactive tungstate or molybdate and hetero species anions react to form the desired heteropoly acid.

REFERENCES:
patent: 1557491 (1925-10-01), Codd
patent: 2503991 (1950-04-01), Bechtold
patent: 3113911 (1963-12-01), Jones
patent: 3124520 (1964-03-01), Juda
patent: 3220941 (1965-11-01), Osborne
patent: 3361518 (1968-01-01), Chiola
patent: 3523880 (1970-08-01), Parsi
patent: 3657104 (1972-04-01), Hodgdon

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