Purification of aluminium chloride

Details Purification of aluminium chloride Purification of aluminium chloride

B - Operations, Transporting

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23/167, 23/358

B01D 3/14 (2006.01) C01B 33/107 (2006.01) C01F 7/62 (2006.01) C01G 1/06 (2006.01) C01G 23/02 (2006.01) C01G 49/10 (2006.01)

Patent

CA 1121982

Abstract of the Disclosure Aluminum chloride ((AlCl3) is recovered from a mixture of gases containing aluminum chloride and other metal chlorides, including titanium tetrachloride (TiCl4), silicon tetrachloride (SiCl4) and ferric chloride (FeCl3). According to this recovery process, the gaseous chloride mixture is subjected to fractional distillation utilizing an array of distillation columns. A suf- ficient amount of titanium tetrachloride is maintained in any column which is operated to separate at least one metal chloride including silicon tetrachloride from a mixture of gases containing aluminum chloride and other metal chlorides and which is operated at temperatures which include the sublimation or melting points of aluminum chloride at the operating pressure of the column to prevent solidification of aluminum chloride in the column.

349560

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