Production of potassium sulfate and hydrogen chloride

Details Production of potassium sulfate and hydrogen chloride Production of potassium sulfate and hydrogen chloride

1975-11-12

1977-08-30

Thomas, Earl C.

Chemistry of inorganic compounds

Halogen or compound thereof

Hydrogen halide

423552, 423520, C01B 708, C01D 502

Patent

active

040455432

ABSTRACT:
Potassium sulfate (K.sub.2 SO.sub.4) is prepared by reaction of potassium chloride and sulfuric acid in an aqueous medium by initially removing evolved HCl in the gaseous form at temperatures of about 65.degree.-120.degree. C., then removing the remaining HCl as an HCl/water azeotrope at temperatures of about 90.degree. to 110.degree. C., restoring to the reaction mixture the amount of water removed with the azeotrope, and permitting the potassium sulfate to crystallize from the solution.

REFERENCES:
patent: 995105 (1911-06-01), Thompson
patent: 2816820 (1957-12-01), Pernert
patent: 2902341 (1959-09-01), Baniel et al.
patent: 3687639 (1972-10-01), Barlow
Seidel, A., Solubilities of Inorganic and Metal Organic Compounds, American Chemical Society, Washington, DC, 1965, 4th Ed., vol. II, pp. 116, 133-135, 297-299, 301, 982-984.

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