Method for the synthesis of amphoteric surfactants
AssigneeTh. Goldschmidt AG
InventorsBurghard Gruning, Christian Weitemeyer
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Abstract
A method for the synthesis of amphoteric surfactants by the reaction of amines with chloroacetic acid or its salts in aqueous solution at an elevated temperature, consists of reacting compounds of the general formula ##STR1## with chloroacetic acid at temperatures ranging from 115.degree. to 180.degree. C., until the chloroacetic acid content is less than 10 ppm.
Claims4
A method for the synthesis of an amphoteric surfactant by reacting amines with chloroacetic acid or its salts in aqueous solution at an elevated temperature, comprising that compounds of the general formula ##STR8## wherein R.sup.1 is a saturated or unsaturated alkyl group with 7 to 19 carbon atoms,
- R.sup.2 is a --(CH.sub.2).sub.q --, --O(CH.sub.2).sub.q -- or --C.dbd.O group (q =1 to 3), is a hydrogen or --CH.sub.2 H.sub.2 --OH group,
- n has a numerical value of 2 or 3 and
- p has a numerical value of 1 to 4,
- are reacted with at least equimolar amounts of chloroacetic acid salts at a temperature ranging from about between 115.degree. and 180.degree. C., until the chloroacetic acid content is less than 10 ppm.
Dependencies are inferred from the claim text.