Method for the synthesis of betaines containing</=10 ppm of organically bound chlorine

摘要

A method for the synthesis of betaines of the general formula <IMAGE> by quaternizing the fatty acid amide dialkylamines of the general formula <IMAGE> with omega -halogenalkylcarboxylic acids of the formula X-(CH2)yCOOH, wherein X is a halogen group, or their salts in aqueous solution, the reaction being carried out within a temperature range of 115 DEG to 180 DEG 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 DEG to 100 DEG C.