Chemistry of inorganic compounds – Carbon or compound thereof – Oxygen containing
Patent
1979-10-01
1982-01-05
Straub, Gary P.
Chemistry of inorganic compounds
Carbon or compound thereof
Oxygen containing
310 11, 423561R, 423561A, 423563, 423566, H02K 4400, C01D 700, C01B 1716, C01B 1700
Patent
active
043093981
ABSTRACT:
A process for converting potassium sulfate to potassium carbonate in which a mixture of potassium sulfate and calcium oxide are reacted at a temperature in the range of between about 700.degree. C. and about 800.degree. C. with a gaseous mixture having a minor amount of hydrogen and/or carbon monoxide in a diluent with the calcium oxide being present in an amount not greater than about 20 percent by weight of the potassium sulfate to produce an aqueous mixture of potassium sulfide, potassium bisulfide, potassium hydroxide and calcium sulfide and a gaseous mixture of steam and hydrogen sulfide. The potassium and calcium salts are quenched to produce an aqueous slurry of soluble potassium salts and insoluble calcium salts and a gaseous mixture of steam and hydrogen sulfide. The insoluble calcium salts are then separated from the aqueous solution of soluble potassium salts. The calcium salts are dried to produce calcium sulfide, calcium bisulfide and steam, and then, the calcium sulfide and calcium bisulfide are converted to the oxide and recycled. The soluble potassium salts are carbonated to produce potassium carbonate which is concentrated and the precipitated crystals separated. The sulfur-containing compounds are further treated.
REFERENCES:
patent: 1045769 (1912-11-01), Bollo et al.
patent: 1560900 (1925-11-01), Drewsew
patent: 1565300 (1925-12-01), White
patent: 2383247 (1945-08-01), Gardner
patent: 2675297 (1954-04-01), Gray et al.
patent: 3127237 (1964-03-01), Markant
patent: 3401010 (1968-09-01), Guerrieri
patent: 3707462 (1972-12-01), Moss
patent: 4243645 (1981-01-01), Lahonda
White et al., Manufacture of Sodium Sulfate, I & EC, vol. 28, #7, Feb. 1936, pp. 244-246.
Denny James E.
Glenn Hugh W.
Jackson Frank H.
Straub Gary P.
The United States of America as represented by the United States
LandOfFree
Conversion of alkali metal sulfate to the carbonate does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Conversion of alkali metal sulfate to the carbonate, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Conversion of alkali metal sulfate to the carbonate will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1844039