Method of purifying phosphoric acid after solvent extraction
AssigneeGardinier, Inc.
InventorsAnastasios P. Kouloheris, JoAnne LeFever
Life of this patent
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Abstract
A method of purifying phosphoric acid after solvent extraction to remove residual amounts of an immiscible organic carrier including contacting the phosphoric acid with a sorbent which sorbs or takes up the residual amount of organic carrier and separating the phosphoric acid from the organic carrier-laden sorbent. The method is especially suitable for removing residual organic carrier from phosphoric acid after solvent extraction uranium recovery.
Claims13
A method of purifying phosphoric acid after a solvent extraction process, comprising:
- contacting phosphoric acid containing residual organic carrier after a solvent extraction process with a gypsum sorbent which sorbs said residual organic carrier,
- sorbing said residual organic carrier on said gypsum sorbent to form organic carrier-laden sorbent and,
- separating said organic carrier-laden sorbent from said phosphoric acid, thereby purifying said phosphoric acid after solvent extraction.
A method of purifying wet-process phosphoric acid after a solvent extraction process in which said solvent is dissolved in kerosene, comprising:
- forming a filter cake of gypsum,
- filtering wet-process phosphoric acid containing residual kerosene after solvent extraction through said filter cake to form a kerosene-laden filter cake, and
- separating said kerosene-laden filter cake from said wet-process phosphoric acid, thereby purifying said wet-process phosphoric acid after solvent extraction.
A method of purifying phosphoric acid after a solvent extraction process, comprising:
- contacting phosphoric acid containing residual organic carrier after a solvent extraction process with a sorbent which sorbs said residual organic carrier, wherein said sorbent is selected from the group consisting of alumino-silicates, calcium silicate, magnesium silicate, acid-treated clay, magnesia-silica gel, Fuller's earth, diatomaceous earth and calcium sulfate,
- sorbing said residual organic carrier on said sorbent to form organic carrier-laden sorbent and,
- separating said organic carrier-laden sorbent from said phosphoric acid, thereby purifying said phosphoric acid after solvent extraction.
Dependencies are inferred from the claim text.