Method for extracting an amino acid ester from a hydrous solution of a mineral acid salt thereof
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United States of America Patent
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Dec 20, 1994
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N/A
app pub date -
Jan 19, 1993
filing date -
Sep 3, 1990
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Expired
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Abstract
Disclosed is a method for extracting an amino acid ester from a hydrous solution which comprises adding thereto a water-insoluble organic solvent and then an amount of a base effective to liberate only a portion of the amino acid ester in free base form, and transferring the thus liberated amino acid ester in the free base form into the organic layer, and repeating the neutralization-extraction steps until all of the amino acid ester has been extracted.
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