RECOVERY OF ORGANIC ACIDS
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United States of America Patent
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Issued Date -
May 10, 2012
app pub date -
Nov 1, 2011
filing date -
Jan 29, 2004
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. A tertiary amine and CO2 are introduced to the solution to form the insoluble carbonate salt and a complex between the acid and an amine. A water immiscible solvent, such as an alcohol, is added to extract the acid/amine complex from the dilute salt solution to a reaction phase. The reaction phase is continuously dried and a product between the acid and the solvent, such as an ester, is formed.
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