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1. US20190031526 - HIGH PURITY TUNGSTEN PENTACHLORIDE AND METHOD FOR SYNTHESIZING SAME

Office United States of America
Application Number 16073288
Application Date 13.01.2017
Publication Number 20190031526
Publication Date 31.01.2019
Publication Kind A1
IPC
C CHEMISTRY; METALLURGY
01
INORGANIC CHEMISTRY
G
COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F94
41
Compounds of tungsten
04
Halides
C01G 41/04
CPC
C01G 41/04
C01P 2006/80
Applicants JX Nippon Mining & Metals Corporation
Inventors Hideyuki TAKAHASHI
Hajime MOMOI
Priority Data 2016-014662 28.01.2016 JP
Title
(EN) HIGH PURITY TUNGSTEN PENTACHLORIDE AND METHOD FOR SYNTHESIZING SAME
Abstract
(EN)

The purpose of the present invention is to safely synthesize high purity tungsten pentachloride at a higher yield and at a higher purity than in prior art. This method for producing tungsten pentachloride includes: a step of mixing a reducing agent selected from the group consisting of Bi, Hg, Sb, Ti, Al, P, and As with tungsten hexachloride uniformly in an inert atmosphere with a molar ratio of the tungsten hexachloride to the reducing agent being 2.8:1.0 to 3.2:1.0 to obtain a mixture; a step of heating the mixture of the reducing agent and the tungsten hexachloride to 80 to 210° C. at 13 Pa or lower and reducing the same; a step of heating the reduced product of the mixture of the reducing agent and the tungsten hexachloride to 120 to 290° C. at 66 Pa or lower and vacuum distilling the same to remove impurities; and a step of heating the reduced product from which impurities have been removed by the vacuum distillation to 140 to 350° C. at 13 Pa or lower and purifying the same by sublimation to obtain the tungsten pentachloride.