Method for the manufacture of pure aluminum oxide from aluminum

Details Method for the manufacture of pure aluminum oxide from aluminum Method for the manufacture of pure aluminum oxide from aluminum

1979-01-26

1980-09-16

Carter, Herbert T.

Chemistry of inorganic compounds

Treating mixture to obtain metal containing compound

Group iiia metal or beryllium

423 34, 423 42, 423132, 423158, 423122, C01F 720

Patent

active

042229898

ABSTRACT:
A process for obtaining pure aluminum oxide (Al.sub.2 O.sub.3) from siliceous aluminum ore is disclosed. The aluminum ore is digested in a hydrochloric acid solution to obtain aluminum chloride, the aluminum chloride is crystallized as the hexahydrate, the aluminum chloride hexahydrate is purified and, subsequently, decomposed to give pure aluminum oxide and secondary products. The mother liquor of the crystallization step and the secondary products of the decomposition step are recycled.

REFERENCES:
patent: 1403061 (1922-01-01), Sieurin
patent: 2189376 (1940-02-01), Burman
patent: 3816605 (1974-06-01), Belsky
patent: 3862293 (1975-01-01), Maurel et al.
patent: 3959438 (1976-05-01), Messner
patent: 4110399 (1978-08-01), Gandernack et al.

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