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US 8,138,363 B2Granted
Process for the production of alkanolamide
AssigneeUniqema Americas LLC
InventorsXin Chen, Howard W. Prokop, Stephen Howard Colmery
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Abstract
The present invention relates to a process for the manufacture of alkanolamide containing compositions, and more particularly to a process of reacting a fatty acid and diethanolamine (DEA) which result in the formation of low levels of undesirable by products, particularly of bis-hydroxyethyl piperazine (BHEP).
Claims22
A method of manufacture of a composition comprising an alkanolamide, the method comprising the steps of:
- (a) adding diethanolamine (DEA) to a fatty acid at a low addition rate to form a mixture of fatty acid and DEA wherein the total molar quantity of fatty acid in the mixture is in excess of the total molar quantity of DEA;
- (b) applying at least a partial vacuum to the mixture;
- and
- (c) maintaining the mixture at a suitable temperature and for sufficient time for the reaction to proceed to form the alkanolamide.
1 more element
Dependencies are inferred from the claim text.