PROCESS FOR REMOVAL OF 1,2-EPOXY-5-HEXENE FROM EPICHLOROHYDRIN
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United States of America Patent
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Issued Date -
Mar 10, 2016
app pub date -
Apr 15, 2014
filing date -
Apr 23, 2013
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Abandoned
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Abstract
The invention relates to a process for purification of epichlorohydrin containing 1,2-epoxy-5-hexene impurity, by
- (a) epoxidizing allyl chloride contaminated with 1,5-hexadiene into epichlorohydrin,(b) removing any unreacted allyl chloride,(c) adding a halogen to the crude epichlorohydrin obtained after the removal of unreacted allyl chloride and allowing the halogen to react with 1,2-epoxy-5-hexene and other olefinically unsaturated components, if any, in the crude epichlorohydrin, and(d) rectifying the product of step (c) to obtain epichlorohydrin,wherein the amount of halogen added in step (c) is at a molar ratio of at least 0.5:1 to less than 1:1 calculated on the amount of said 1,2-epoxy-5-hexene and said other olefinically unsaturated components in the crude epichlorohydrin, and allowing the halogen to react until it is fully converted.
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