Method for producing titanium fluoride

Details Method for producing titanium fluoride Method for producing titanium fluoride

1988-11-25

1990-04-17

Russel, Jeffrey E.

Chemistry of inorganic compounds

Treating mixture to obtain metal containing compound

Group ivb metal

423 81, 423 83, 423 85, 423140, 423143, 423464, 423489, C01G 2302, C01G 4910

Patent

active

049178725

ABSTRACT:
A method for producing titanium fluoride comprises: a dissolution process, wherein iron-containing titanium material is dissolved in solutions containing hydrofluoric acid, fluoride solutions being produced; a first crystallization and separation process, wherein ferric fluoride is crystallized and ferric fluoride crystals thus obtained are separated from the fluoride solutions by cooling the fluoride solutions, crude titanium fluoride solutions being produced; a second crystallization and separation process, wherein a mixed salt of (NH.sub.4).sub.2 TiF.sub.6 and (NH).sub.3 FeF.sub.6 is crystallized and separated by mixing ammonium fluoride solutions with the crude titanium fluoride solutions to obtain a mixture and concentrating the mixture; a first pyrolysis process, wherein the ammonium fluoride salt is pyrolyzed at a temperature of from 300.degree. to 800.degree. C. in a stream of dry gas after having dried the ammonium fluoride, solid ferric fluoride (FeF.sub.3) and gaseous TF.sub.4, HF and NH.sub.3 being produced; a condensation and separation process, wherein the gaseous TiF.sub.4, HF and NH.sub.3 are condensed at a temperature of from 20.degree. to 280.degree. C. and followed by the TiF.sub.4 separation of solid.

REFERENCES:
patent: 2042434 (1936-05-01), Svendsons
patent: 2568341 (1951-09-01), Kawecki et al.

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