Purification of APT

Details Purification of APT Purification of APT

1989-09-25

1990-10-16

Stoll, Robert L.

Chemistry of inorganic compounds

Treating mixture to obtain metal containing compound

Group vib metal

423 53, 423 55, 423593, 423606, C01G 4100

Patent

active

049633368

ABSTRACT:
Directed to a process for producing a tungsten product of enhanced purity from ammonium paratungstate (APT) with a minimum number of processing steps which comprises mixing the APT with an ammonium solution, autoclaving the mixture at a temperature above the boiling point thereof to dissolve the APT and recrystallizing APT from the solution to yield an APT product of enhanced marketability.

REFERENCES:
patent: 2893832 (1959-07-01), Loung
patent: 4092400 (1978-05-01), Zbranek et al.
patent: 4115513 (1978-09-01), Kulkarni et al.
patent: 4168296 (1979-09-01), Lundquist
patent: 4623534 (1986-11-01), Scheithauer et al.

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