Double digestion system to reduce formation of ferrous iron

Details Double digestion system to reduce formation of ferrous iron Double digestion system to reduce formation of ferrous iron

1983-04-04

1984-05-01

Carter, Herbert T.

Chemistry of inorganic compounds

Treating mixture to obtain metal containing compound

Group iiia metal or beryllium

423127, C01F 706

Patent

active

044461178

ABSTRACT:
Bauxite is reacted with spent caustic soda solution at 113.degree. C. to 205.degree. C. to produce a first pregnant liquor stream, a granular residue stream and a muddy substance stream wherein the granular residue stream is discarded, the muddy substance stream is reacted with or without a small portion of bauxite, but with a spent caustic soda stream at 206.degree. C. to 350.degree. C. to produce a second pregnant liquor stream and a red mud stream which is discarded; the first and second pregnant liquor streams are filtered, cooled to 50.degree. C. to 87.degree. C. and then seeded to precipitate alumina hydrate containing less than 0.017% Fe.sub.2 O.sub.3 by weight.

REFERENCES:
patent: 2701751 (1955-02-01), Porter
patent: 2701752 (1955-02-01), Porter
patent: 2852343 (1958-09-01), Scandrett et al.

Affiliated with

Also associated with

Rating

Double digestion system to reduce formation of ferrous iron does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Double digestion system to reduce formation of ferrous iron, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Double digestion system to reduce formation of ferrous iron will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2031383