Patent ID: 7208118
Filing Date: 2007-04-24
Classification: C07C,C08G,C10M,C10N,C11D,C23F

Abstract:
1. A process for preparing compounds of the formula (1) where A is C B is C n is a number from 1 to 100, and R is C a) alkylating a basic mixture of oxoalkylated alcohols of the formula and alkoxides thereof with a C 2 - to C 5 -chlorocarboxylic acid in the absence of a solvent, b) converting the thus obtained ethercarboxylic acid salt to the free ethercarboxylic acid by adding an acid, the pH being adjusted to 3 or less, c) freeing the thus obtained ethercarboxylic acid, without washing, of water present down to a residual water content of <0.30% by distillation under reduced pressure, and d) removing the precipitated metal salts by filtration, so that the resulting product has a residual salt content of <0.2%.