ALUMINUM HYDROXIDE PREPARED BY BAYER PROCESS WITH LOW CONTENT OF ORGANIC CARBON Russian patent published in 2008 - IPC C01F7/46

Abstract RU 2323159 C2

FIELD: inorganic compounds technology.

SUBSTANCE: invention relates to Bayer process, in particular to removal of organic carbon from aluminum hydroxide. A method for production of aluminum hydroxide with total organic carbon content below 0.5 mg/g comprises following stages: (a) dispersing aluminum hydroxide in water containing from about 50 to about 1000 g solids per 1 L water at temperature of suspension from 5 to 95°C; (b) maintaining solids in suspended state using stirring; (c) contacting suspension with ozone-oxygen mixture wherein ozone concentration is up to 20 wt %; and (d) recovering aluminum hydroxide from suspension.

EFFECT: improved quality of product.

7 cl, 2 tbl, 2 ex

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RU 2 323 159 C2

Authors

Malito Dzhon T.

Dates

2008-04-27—Published

2003-08-04—Filed