| 摘要 |
PURPOSE:To manufacture the titled high-purity chromium chloride in high yield by heating impure anhydrous chromium chloride in an atmosphere inactive to anhydrous chromium chloride at an appropriate temp. for a comparatively short time. CONSTITUTION:The impure anhydrous chromium chloride is heated at 650- 950 deg.C in an atmosphere inactive to anhydrous chromium chloride such as Ar, and the high-purity chromium chloride is obtained in high yield with a little evaporation loss of CrCl3 and little decomposition of CrCl3 into CrCl2. When a large amt. of compds. whose b.p. are close to or higher than the b.p. of CrCl3 such as CuCl and MnCl2 are present in the impure anhydrous chromium chloride, said compds. are previously heated at >=700 deg.C and vaporized in gaseous chlorine atmosphere. And the anhydrous chromium chloride obtained by condensing said vaporized material is preferably subjected to said heating treatment. The anhydrous chromium chloride contg. a large amt. of FeCl3 is preferably heated at >=b.p. of FeCl3 and <=600 deg.C, and then subjected to said heating treatment.
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