Disclosed is a method of removing an acid halide, anhydride, or ester impurity from a mixture with a desired product with which it codistills. At least about a stoichiometric amount of a primary or secondary amine having a boiling point at least 10°C higher or lower than the boiling point of said desired product is added to the mixture. The desired product is not an acid halide, anhydride, or ester and does not react with the amine. The amine forms a reaction product with the impurity that has a boiling point at least 10°C higher or lower than the boiling point of the desired product. The mixture is distilled to isolate the desired product.
本发明公开了一种从混合物中去除酸卤化物、酸酐或
酯类杂质的方法,混合物中含有与之共蒸馏的所需产品。在混合物中加入至少约等比量的
伯胺或仲胺,其沸点比所述所需产品的沸点高或低至少 10°C。所需的产物不是酸卤、酸酐或酯,不会与胺发生反应。胺与杂质形成反应产物,其沸点比所需产物的沸点高或低至少 10°C。对混合物进行蒸馏,分离出所需产物。