Process for effecting seeding in two phases for producing large-

Details Process for effecting seeding in two phases for producing large- Process for effecting seeding in two phases for producing large-

1985-11-19

1986-10-14

Doll, John

Chemistry of inorganic compounds

Treating mixture to obtain metal containing compound

Group iiia metal or beryllium

423122, 423123, 423124, 423127, 423629, 23301, 23302R, 23305A, 75108, 75109, 75121, C01F 702

Patent

active

046171797

ABSTRACT:
The invention concerns a process for the precipitation of aluminium hydroxide by seeding in two phases, which is intended to produce at a high level of productivity alumina with large grains, referred to as `sandy coarse`, by precipitation in a succession of tanks in cascade relationship of a supersaturated solution of sodium aluminate coming from alkaline attack on bauxite in accordance with the BAYER process. The process comprises three stages:

REFERENCES:
patent: 4234559 (1980-11-01), Tschamper
patent: 4305913 (1981-12-01), Anjier
patent: 4311486 (1982-01-01), Yamada et al.
patent: 4364919 (1982-12-01), Yamada et al.

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