Production of alumina

Details Production of alumina Production of alumina

1982-09-03

1984-11-20

Doll, John

Chemistry of inorganic compounds

Treating mixture to obtain metal containing compound

Group iiia metal or beryllium

423121, 423123, 423131, 423205, 423641, C01F 700

Patent

active

044838301

ABSTRACT:
A process for recovery of alumina and soda from materials containing sodium aluminosilicates, such as red mud and desilication products, comprises treating said materials with lime at elevated temperature and pressure. In a preferred embodiment of the invention, hydrothermal treatment of red mud with lime is integrated into a Bayer process to improve the overall efficiency of that process.

REFERENCES:
patent: 3210155 (1965-10-01), Cagnolatti
patent: 3868442 (1975-02-01), Fish
patent: 3944648 (1976-03-01), Solymar et al.
patent: 3998927 (1976-12-01), Hudson et al.
patent: 4044095 (1977-08-01), Hudson et al.

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