The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 08, 2013
Filed:
Nov. 06, 2012
Intercontinental Potash Corp. (Usa), Hobbs, NM (US);
Thomas H. Neuman, Salt Lake City, UT (US);
Richard W. Chastain, Carlsbad, NM (US);
Donial M. Felton, Carlsbad, NM (US);
Daniel C. Neuman, Soda Springs, ID (US);
Otto C. Schnauber, Rock Springs, WY (US);
Intercontinental Potash Corp. (USA), Hobbs, NM (US);
Abstract
Methods of forming potassium sulfate include calcining polyhalite ore particles to convert the polyhalite ore particles to a water-soluble composition. At least a portion of the water-soluble composition is dissolved in an aqueous medium to form an aqueous solution comprising K, Mg, and SOions and a calcium-containing solid. The calcium-containing solid is separated from the aqueous solution to form a filtrate comprising K, Mg, and SOions. A potassium-containing salt is dissolved in the filtrate to increase the concentration of Kand SOions to from a concentrated liquor, and KSOis crystallized from the concentrated liquor. A system for processing polyhalite ore includes a countercurrent leaching apparatus, a first mix tank, an evaporator, and at least one crystallizer.