RECOVERY OF ORGANIC ACID USING A COMPLEX EXTRACTION SOLVENT
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United States of America Patent
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Issued Date -
May 29, 2014
app pub date -
Oct 17, 2011
filing date -
Oct 18, 2010
priority date (Note) -
Abandoned
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Abstract
A method is disclosed for the recovery of an organic acid from a dilute salt solution in which the cation of the salt forms an insoluble carbonate salt. An amine, C02 and a water immiscible solvent are introduced to the solution to form the insoluble carbonate salt and a complex between the acid and the amine that is soluble in both an aqueous and a solvent phase. The complex is extracted into the solvent phase which is than distilled to recover the acid or an ester of the acid in a concentrated form.
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