Method of processing sodium oxalate formed during the digestion

Details Method of processing sodium oxalate formed during the digestion Method of processing sodium oxalate formed during the digestion

1985-03-19

1987-05-05

Carter, H. T.

Chemistry of inorganic compounds

Treating mixture to obtain metal containing compound

Group iiia metal or beryllium

423121, 423130, C01F 704

Patent

active

046631321

ABSTRACT:
In a method of processing contaminated sodium oxalate which becomes available in a separating stage succeeding the digestion of bauxite in accordance with the Bayer process, chemicals used in the digesting process are recovered in that moist sodium oxalate which has been separated is dried with the hot exhaust gases from a rotary kiln jointly with aluminum hydroxide or aluminum oxide hydrate and/or reactive alumina at a mole ratio of aluminum to sodium of at least 0.8 and the dried product is decomposed in said rotary kiln at a temperature of 780.degree. to 1000.degree. C. to form sodium aluminate. Suitably drying is effected by spray drying in direct contact with the exhaust gases of the rotary kiln and decomposition is effected at a temperature in the range from 850.degree. to 950.degree. C. and with an Al:Na ratio not in excess of 1.2.

REFERENCES:
patent: 4038039 (1977-07-01), Carruthers et al.
patent: 4280987 (1981-07-01), Yamada et al.

Affiliated with

Also associated with

Rating

Method of processing sodium oxalate formed during the digestion does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Method of processing sodium oxalate formed during the digestion , we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method of processing sodium oxalate formed during the digestion will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2398409