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US 5,496,959 AGranted
Preparation of N-acyl taurates
AssigneeHoechst Celanese Corporation
InventorJames F. Day
Life of this patent
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Abstract
This invention relates to the preparation of N-acyl taurates by the direct condensation of carboxylic acids with taurate (substituted 2-aminoalkane sulfonic acids and their alkali metal salts) derivatives.
Claims3
A method for making compounds of Formula I:
- ##STR4## wherein:
- R is selected from the group consisting of C.sub.7 -C.sub.17 saturated or unsaturated straight chain or branched hydrocarbyl group;
- R.sup.1 is selected from the group consisting of hydrogen, methyl and cyclohexyl;
- and X is selected from the group consisting of sodium, potassium and magnesium,
- wherein said method comprises the following steps:
- (a) a direct amidation of a compound of Formula II:
- R.sup.1 --N(H)--CH.sub.2 --CH.sub.2 --SO.sub.3 H Formula II
- with a fatty acid of Formula III:
- R-COOH, at a temperature between 180 degrees C. and 205 degrees C. in the presence of a catalytic amount of at least one compound selected from the group consisting of boric acid, zinc oxide and magnesium oxide;
- (b) addition of up to 20 percent by weight of paraffin waxes during reaction;
- (c) quenching the reaction with up to 50 percent by weight of water;
- and
- (d) forming a salt of Formula I.
10 more elements
Dependencies are inferred from the claim text.