Method for producing potassium sulfate and sodium chloride from wastewater
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United States of America Patent
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Sep 15, 2020
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app pub date -
Nov 22, 2017
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Dec 12, 2016
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Abstract
A method of producing potassium sulfate by employing sodium sulfate and potassium chloride sources is disclosed. The method includes a crystallization process that yields a mother liquor containing sulfate, sodium and chloride. The mother liquor is directed to an anion segregation unit that produces a reject or retentate rich in sulfate which is recycled and employed in the production of the potassium sulfate. Further, the anion segregation unit produces a permeate that is depleted in sulfate but includes sodium and chloride and is directed to a sodium chloride crystallizer for producing sodium chloride.
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