Chemistry of inorganic compounds – Sulfur or compound thereof – Oxygen containing
Patent
1982-08-06
1984-03-13
Straub, Gary P.
Chemistry of inorganic compounds
Sulfur or compound thereof
Oxygen containing
423482, C01B 701, C01D 502
Patent
active
044367104
ABSTRACT:
This improved method comprises a first dry step of reacting concentrated sulfuric acid and potassium sulfate with potassium chloride at about 300.degree. C. in a slurried state to obtain a mixed slurried salts of K.sub.n H.sub.2-n SO.sub.4 (n being 1.3 to 1.4); a second wet step of dissolving said mixed salts and additional raw potassium chloride in water, the amount of water being limited to some extent, heating the solution to 60.degree. to 90.degree. C. in order to take place a wet reaction, and cooling the solution to 50.degree. to 20.degree. C. to deposit potassium sulfate crystals from the solution in order to obtain the final product and filtrate; and a third circulating step of evaporating the filtrate to obtain a cake of mixed salts of acid potassium sulfate and potassium chloride, and returning circulatingly the cake to the first stage as part of raw materials.
REFERENCES:
patent: 2275825 (1942-03-01), Lewis
patent: 2706145 (1955-04-01), Cannon
patent: 2762689 (1956-09-01), Giraitis et al.
patent: 3563701 (1967-02-01), Cannon
patent: 3687639 (1972-08-01), Barlow et al.
patent: 3998935 (1976-12-01), Adams et al.
patent: 4045543 (1977-08-01), Sardisco
patent: 4342737 (1982-08-01), Iwashita et al.
Fujimura Akira
Miyazaki Naomi
Onoda Chemical Industry Co., Ltd.
Straub Gary P.
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