Purification of contaminated alumina scavengers of aluminum redu

Details Purification of contaminated alumina scavengers of aluminum redu Purification of contaminated alumina scavengers of aluminum redu

1976-07-27

1977-12-13

Bashore, S. Leon

Cleaning and liquid contact with solids

Processes

Including application of electrical radiant or wave energy...

55242, 55243, 134 25R, 204 67, 252411R, 252412, 252414, 252420, B08B 312

Patent

active

040626962

ABSTRACT:
Metallic and nonmetallic impurities are removed from contaminated alumina scavengers, such as employed for the purification of aluminum reduction cell effluents in dry scrubber systems, by preparing a slurry of the contaminated alumina and subjecting the slurry to an ultrasonic treatment. The treatment removes a significant quantity of the impurities, which will be dispersed in the liquid phase and can be readily separated from the purified alumina. The cleaned alumina is suitable for return to the dry scrubbing system or to be used as feed in the electrolytic aluminum reduction cells.

REFERENCES:
patent: 2919174 (1959-12-01), Pring
patent: 3222221 (1965-12-01), Branson
patent: 3231513 (1966-01-01), Graves et al.
patent: 3503184 (1970-03-01), Knapp et al.
patent: 3780497 (1973-12-01), Muhlrad
patent: 3827955 (1974-08-01), Bahri et al.
patent: 3849196 (1974-11-01), Halloway et al.
patent: 4006066 (1977-02-01), Sparwald

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