Verfahren zur Reinigung von Carbonsäurechloriden

摘要

The invention relates to a method for purifying acid chlorides which have been produced by converting carboxylic acids with carbon oxychloride or thionyl chloride in the presence of a catalyst adduct. The acid chlorides are treated with a hydro halide of carboxylic acid amides of general formula (I), wherein R<1> stands for hydrogen or C1- to C3-alkyl; R<2> and R<3>, independently from one another, mean C1- to C4-alkyl or R<2> and R<3> together mean a C4- or C5-alkylene chain. The thus purified acid chloride is isolated by separation said acid chloride from the carboxylic acid amide hydro halide-phase.