Method for producing titanium fluoride

Details Method for producing titanium fluoride Method for producing titanium fluoride

C - Chemistry, Metallurgy

01

G

53/153, 23/159

C01G 23/02 (2006.01) C22B 3/44 (2006.01) C22B 34/12 (2006.01)

Patent

CA 1302047

Abstract of the Disclosure 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 crysals 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 ammonium fluoride salt ( mixed salt of (NH4)2 TiF6 and (NH)3FeF6 ) is crystallized and separated by mixing ammonium fluoride solutions with the crude titanium solutions to obtain a mixture and concentrating the mixture; a first pyrolysis process, wherein the ammonium fluoride salt i pyrolyzed at a temperature of from 300 to 800° C in a stream of dry gas after having dried the ammonium fluoride, ferric fluoride (FeF3) in a solid state and TF4, HF and NH3 in a gaseous state being produced; a condensation and separation process, wherein the TiF4, HF and NH3 in a gaseous state are condensed at a temperature of from 20 to 280 ° C and the TiF4 in a solid state is separated from HF and NH3 in a gaseous state.

584564

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