Use of surfactants in alumina precipitation in the bayer process

Details Use of surfactants in alumina precipitation in the bayer process Use of surfactants in alumina precipitation in the bayer process

1987-04-09

1988-04-12

Garvin, Sr., Patrick P.

Chemistry of inorganic compounds

Treating mixture to obtain metal containing compound

Group iiia metal or beryllium

423130, 423625, C01F 700, C01F 706, C01F 702, C22B 2100

Patent

active

047373520

ABSTRACT:
A method and composition for producing a more coarse alumina trihydrate crystal in a Bayer process pregnant liquor, involving the addition of approximately 5-400 mg/l of surfactant-oil, the oil dissolving the surfactant which can be selected from a host of surfactants which are stable in (hot) caustic solutions and capable of dispersing hydrophobic liquids in the Bayer liquor. The preferred embodiment involves the use of tall-oil fatty acids; a number of equivalent surfactants are established. The oil or hydrocarbon (hydrophobic) liquid can be selected from paraffinic oils, naphthenic oils, mineral seal oils, fuel oils, and bottoms or residue from a C.sub.10 alcohol distillation.

REFERENCES:
patent: 4608237 (1986-08-01), Roe et al.

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