Continuous synthesis of mercaptocarboxylic acid esters
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United States of America Patent
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Mar 10, 1992
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N/A
app pub date -
Oct 5, 1990
filing date -
Oct 6, 1989
priority date (Note) -
Expired
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Abstract
The invention relates to production of esters of mercaptocarboxylic acids and alcohols forming an azeotrope with water. The esterification is carried out continuously in the presence of an excess of alcohol and the water formed is removed by entraining azeotropically under vacuum at a temperature such that the residual water concentration in the reaction mixture remains constantly below 0.5% by weight. The process according to the invention applies more particularly to the synthesis of octyl esters of thioglycolic acid.
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