Process for the manufacture of inorganic chlorides

摘要

1,139,464. Inorganic chlorides. CIBA Ltd. 29 March, 1966 [22 May, 1965], No. 13916/66. Heading C1A. Chlorides of V, Mo, W, Ta, Nb, Ti and B are formed by chlorination of ferro-alloys, carbides or hard metal scrap by introducing this mixed with NaCl into a liquid melt of NaCl and FeCl 3 . at 155-700‹ C., removing the resulting chloride vapour and condensing it. The alloy particle size is 1 to 5 mm. and NaCl is added to the FeCl 3 to form the melt in excess of about 10% over the theoretical quantity. The ferro-alloys may have been produced by aluminium-treated ores. If the process is continuous, Cl 2 is introduced into the melt to rechlorinate the FeCl 2 formed. The process is useful for the manufacture of niobium pentachloride and tantalum pentachloride from the corresponding ferro-alloys and for the recovery of W, Ti Nb and Ta from scrap metal. The iron from the alloy is transformed to iron chloride which forms a complex with the sodium chloride, FeNaCl 4 , which complex is not volatile and remains in the melt.