Bayer process for producing aluminum hydroxide having improved w

Details Bayer process for producing aluminum hydroxide having improved w Bayer process for producing aluminum hydroxide having improved w

1986-02-03

1987-06-30

Sadowski, David

Chemistry of inorganic compounds

Treating mixture to obtain metal containing compound

Group iiia metal or beryllium

423127, 423629, 423112, 210651, 210654, B01D 1300

Patent

active

046769595

ABSTRACT:
A process for producing aluminum hydroxide product having an improved level of whiteness is disclosed. In the process, a caustic solution having dissolved aluminum hydroxide is subjected to purification to remove color producing humate material. Purification includes passing the caustic solution through a semi-permeable membrane. The solution purified of humate material is treated to precipitate aluminum hydroxide therefrom.

REFERENCES:
patent: 4207182 (1980-06-01), Marze
patent: 4366129 (1982-12-01), Czegledi et al.
Encyclopedia of Chemical Technology, 1978, vol. 2, pp. 140-143.
Hackh'S Chemical Dictionary, McGraw Hill, Fourth Edition, 1969, p. 32.
Chapurlat, C. L. Brousse and Quentin, J. P. Desalination, 18, No. 2, Apr. 1976, Elsevier Scientific Publishing Co.

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