Continuous process for obtaining pure alumina from an acidic liq

Details Continuous process for obtaining pure alumina from an acidic liq Continuous process for obtaining pure alumina from an acidic liq

1979-05-08

1980-12-23

Carter, Herbert T.

Chemistry of inorganic compounds

Treating mixture to obtain metal containing compound

Group iiia metal or beryllium

423128, 423132, C01F 722, C01F 726

Patent

active

042410304

ABSTRACT:
A process for obtaining pure alumina comprising the combination of chlorosulphuric attack of calcined aluminous ores containing impurities, followed by concentration of the liquor obtained after the attack and separation of the sterile material, sulphuric acid treatment of the concentrated liquor followed by chlorination to precipitate almost all the hexahydrated aluminum chloride, separation of the precipitate of hexahydrated aluminum chloride and of the chlorosulphuric mother liquor charged with impurities, pyrohydrolysis of the precipitate to give the desired pure alumina with recycling of released hydrochloric acid, degassing of the chlorosulphuric liquor of impurities with recycling of the gaseous HCl for chlorination, yielding a sulphuric liquor of impurities, finally the elimination of the impurities present in this latter liquor in the form of a sulphuric precipitation by concentration in the presence of potassium ions.

REFERENCES:
patent: 3484196 (1969-12-01), Cohen et al.
patent: 3620671 (1971-11-01), Maurel et al.
patent: 3862293 (1975-01-01), Maurel et al.
patent: 4124680 (1978-11-01), Cohen et al.

Affiliated with

Also associated with

Rating

Continuous process for obtaining pure alumina from an acidic liq does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Continuous process for obtaining pure alumina from an acidic liq, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Continuous process for obtaining pure alumina from an acidic liq will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2242328