Production of pure alumina from iron contaminated sulfate liquor

Chemistry of inorganic compounds – Treating mixture to obtain metal containing compound – Group iiia metal or beryllium

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423126, 423139, 75101BE, C01F 700, C01F 730

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active

041072669

ABSTRACT:
Alumina is recovered from aluminum sulfate leach liquors by treatment of the liquor with HCl gas to the point of incipient crystallization of AlCl.sub.3.6H.sub.2 O, extraction of the resulting solution with a tertiary amine to remove iron, further treatment with HHl gas to precipitate AlCl.sub.3.6H.sub.2 O and roasting of the AlCl.sub.3.6H.sub.2 O to Al.sub.2 O.sub.3.

REFERENCES:
patent: 3082062 (1963-03-01), Preuss
patent: 3323865 (1967-06-01), Michener et al.
patent: 3331662 (1967-07-01), Feller
patent: 3862293 (1975-01-01), Maurel et al.

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