Method for the synthesis of betaines containing.ltoreq.10 ppm of organically bound chlorine
AssigneeTh. Goldschmidt AG
InventorsBurghard Gruning, Willi Foitzik, Christian Weitemeyer, Hans-Dieter Kaseborn
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Abstract
A method for the synthesis of betaines of the general formula ##STR1## by quaternizing the fatty acid amide dialkylamines of the general formula ##STR2## with .omega.-halogenalkylcarboxylic acids of the formula X-(CH.sub.2).sub.y COOH, wherein X is a halogen group, or their salts in aqueous solution, the reaction being carried out within a temperature range of 115.degree. to 180.degree. C., until organically bound chlorine can no longer be detected, the fatty acid amide dialkylamine optionally being quaternized partially or completely in a first step at 80.degree. to 100.degree. C.
Claims3
A method for the synthesis of betaines of the general formula ##STR8## wherein R.sup.1 CO is an acyl group derived from a fatty acid or a fatty acid mixture with 6 to 8 carbon atoms,
- R.sup.2 and R.sup.3 are the same or different and represent alkyl groups with 1 to 4 carbon atoms,
- x=2 or 3 and
- y=1, 2 or 3,
- by quaternizing the fatty acid amide dialkylamine of the general formula ##STR9## with chlorocarboxylic acids of the formula Cl(CH.sub.2).sub.y COOH or their salts in aqueous solution, comprising carrying out the reaction between about 115.degree. to 180.degree. C., until organically bound chlorine is about .ltoreq.10 ppm, the fatty acid amide dialkylamine optionally being quaternized at least partially in a first step between about 80.degree. to 100.degree. C.
Dependencies are inferred from the claim text.