Process for crystallizing potassium sulfate
AssigneeInternational Minerals & Chemical Corp.
InventorsWilliam B. Dancy, Hsi Meng
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Abstract
An improved process for the production of potassium sulfate crystals by the reaction of saturated solution of potassium chloride with langbeinite in the solid phase at a temperature of from 45.degree.-55.degree. C., thereby forming potassium sulfate crystals and magnesium chloride solution comprising the step of conducting the reaction in the presence of a growth enhancer comprising monosulfonated or monosulfated surfactant and a neutralized disulfonated surfactant in a weight ratio of from about 0.14 to 0.69.
Claims6
An improved process for the production of potassium sulfate crystals by the reaction of a saturated solution of potassium chloride with langbeinite in the solid phase at a temperature of from 45.degree.-55.degree. C., thereby forming potassium sulfate crystals and magnesium chloride solution comprising the step of conducting the reaction in the presence of from 1.2 to 2.4 kg per ton of langbeinite of a crystal growth enhancer consisting of from about 0.20 to 0.50 parts by weight of component (A) per part of component (B) wherein (A) is a mixture of neutralized alkylated diphenyloxide mono-sulfonic acid and a neutralized monosulfated fatty acid of 5 to 20 carbon atoms in a ratio of 1.66-20 parts of neutralized sulfated oleic acid per part of neutralized alkylated diphenyloxide monosulfonic acid and component (B) is a neutralized alkylated diphenyloxide disulfonic acid, wherein the acids are neutralized with sodium or potassium cations and the alkylated moiety of the diphenyloxide mono- or disulfonic acid is of from 10 to 14 carbon atoms and may be branched chain or straight chain or mixtures thereof.
Dependencies are inferred from the claim text.