Treatment of alumina to reduce discoloration

Details Treatment of alumina to reduce discoloration Treatment of alumina to reduce discoloration

1977-06-20

1978-09-26

Carter, Herbert T.

Chemistry of inorganic compounds

Changing color characteristic of impurity

423265, 423630, C01F 702

Patent

active

041170857

ABSTRACT:
A method of reducing discoloration of alumina which is caused by exposure of said alumina to high temperatures is disclosed. The method comprises adding an effective amount of an inorganic oxidizing agent (e.g. H.sub.2 O.sub.2 or NaOCl) to the alumina prior to exposing it to the high temperature.

REFERENCES:
patent: 3226332 (1965-12-01), Lincoln et al.
patent: 3630674 (1971-12-01), Davidson
patent: 3925257 (1975-12-01), Horzepa et al.
patent: 3944658 (1976-03-01), Yoldas

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