Desilication of Bayer process solutions

Details Desilication of Bayer process solutions Desilication of Bayer process solutions

1990-08-17

1992-06-02

Morris, Theodore

Chemistry of inorganic compounds

Silicon or compound thereof

Oxygen containing

423118, 423119, 423121, 423131, C01B 3312

Patent

active

051184842

ABSTRACT:
A process is described for removing dissolved silica from process solutions or slurries formed in the Bayer process for producing alumina from bauxite. In the novel process, a Bayer process solution or slurry is contacted with porous agglomerates of a material containing Bayer process desilication product and bonded together by a polymer resin which is resistant to chemical degradation by high concentrations of caustic present in Bayer process liquors. The desilication product is essentially complex hydrated sodium aluminum silicates and typical bonding resins are polyvinylchloride or polypropylene.

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Chemical Engineers' Handbook, 5th Edition, pp. 8-65.

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