Process for removing iron in sodium aluminate liquors obtained f

Details Process for removing iron in sodium aluminate liquors obtained f Process for removing iron in sodium aluminate liquors obtained f

1995-12-13

1997-05-13

Bos, Steven

Chemistry of inorganic compounds

Treating mixture to obtain metal containing compound

Group iiia metal or beryllium

C01F 100

Patent

active

056289723

ABSTRACT:
A process for eliminating iron from supersaturated sodium aluminate solutions obtained from the alkaline attack according to the Bayer process of the monohydrate bauxite including successively the steps of grinding and eventually of desilicatation in the presence of an aliquot of decomposed liquor, then attack at a temperature higher than 200.degree. C., usually between 240.degree. and 270.degree. C., of the said crushed and eventually desilicatated bauxite by the remaining fraction of the decomposed liquor, to make the alumina hydrate soluble and to form at the end of the attack an insoluble suspension of the residue or red mud in the supersaturated sodium aluminate liquor which, after cooling and dilution, is decanted to separate the mud or insoluble residues from the supersaturated liquor destined to be decomposed in the presence of seeds after filtration, characterized by the fact that at the end of the attack, during the cooling of the suspension achieved by decreasing the pressure in the reactors, one injects in the said suspension at a temperature higher than 140.degree. C. a small quantity of a mixture containing calcium.

REFERENCES:
patent: 3796789 (1974-03-01), Adams
patent: 3966874 (1976-06-01), Featherston et al.
patent: 4483830 (1984-11-01), Cresswell et al.
patent: 4518571 (1985-05-01), Kaluzhsky et al.

Affiliated with

Also associated with

Rating

Process for removing iron in sodium aluminate liquors obtained f does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Process for removing iron in sodium aluminate liquors obtained f, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Process for removing iron in sodium aluminate liquors obtained f will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1382960