Process for preparing 3-hydroxyesters from epoxide derivatives
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United States of America Patent
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Jul 29, 2003
Grant Date -
Jun 12, 2003
app pub date -
Oct 17, 2002
filing date -
Oct 17, 2001
priority date (Note) -
Expired
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Abstract
Disclosed herein is a novel process for preparing 3-hydroxyesters, comprising: (a) reacting an epoxide derivative with carbon monoxide and alcohol in a solvent at a temperature of 30.about.150.degree. C. under a pressure of 50.about.3000 psig by using a catalyst system consisting of a catalytic amount of a cobalt compound and optionally an effective amount of a promoter to produce a 3-hydroxyester or a derivative thereof; (b) separating the resulting product and the solvent from the cobalt compound and the promoter in a stripping column at a temperature of -30.about.200.degree. C. in an atmosphere of a stabilizing gas; and (c) recycling a part or all of the separated cobalt compound and promoter to the step (a) and repeating the steps (a) through (c).
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