Use of surfactants in alumina precipitation in the bayer...

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

C - Chemistry, Metallurgy

01

F

23/240, 134/55

C01F 7/14 (2006.01) C01F 7/46 (2006.01) C01F 7/47 (2006.01)

Patent

CA 1266365

Abstract of the Disclosure 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/1 of a surfactant oil mixture, the oil dissolving the surfactant which can be selected from a wide range 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 also described. 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 C10 alcohol distillation.

563608

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