Recovery of alumina trihydrate in the Bayer process

Details Recovery of alumina trihydrate in the Bayer process Recovery of alumina trihydrate in the Bayer process

1990-04-10

1991-08-20

Hruskoci, Peter

Chemistry of inorganic compounds

Treating mixture to obtain metal containing compound

Group iiia metal or beryllium

423122, 210727, 210728, 210730, 210733, 210734, C01F 746

Patent

active

050412698

ABSTRACT:
In a Bayer process for production of aluminum, alumina trihydrate crystals are formed in the pregnant liquor and are flocculated using a combination of dextran and synthetic polymer, usually a homo- or copolymer of acrylic acid. The process is particularly advantageous where the liquor contains organic components such as humate and/or oxalate.

REFERENCES:
patent: 3390959 (1968-07-01), Sibert
patent: 3445187 (1969-05-01), Sibert
patent: 3541009 (1970-11-01), Arendt et al.
patent: 3575868 (1971-04-01), Galvin et al.
patent: 4478795 (1984-10-01), Hereda et al.
patent: 4608237 (1986-08-01), Roe et al.

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