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US 5,194,639 AGranted
Preparation of polyhydroxy fatty acid amides in the presence of solvents
AssigneeThe Procter & Gamble Company
InventorsDaniel S. Connor, Jeffrey J. Scheibel, Roland G. Severson
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Abstract
Polyhydroxy fatty acid amide materials are prepared from reactants such as N-methylglucamine and fatty acid esters in the presence of hydroxy solvents. Polyhydroxy fatty acid amide detersive surfactants are secured. By-product and color formation are minimized.
Claims6
A process for preparing polyhydroxy fatty acid amides, in purified substantially uncyclized form, by reacting a fatty acid ester and an N-alkyl polyhydroxy amine in one or more hydroxy or alkoxylated solvents in the presence of a base catalyst, said process being characterized by the following parameters:
- (a) said base catalyst is an alkoxide catalyst;
- (b) said process is carried out at a temperature of from about 25.degree. C. to about 130.degree. C.;
- (c) said process is carried out at a weight ratio of fatty acid ester:N-alkyl polyhydroxy amine of at least about 1:1,
- (d) said fatty acid ester is a C.sub.12 -C.sub.20 a fatty acid ester;
- and
- (e) said solvent is a C.sub.1 -C.sub.4 alcohol, ethylene glycol, propylene glycol, glycerol, alkoxylated alcohol, or mixtures thereof.
3 more elements
Dependencies are inferred from the claim text.