A process is disclosed for the purification of the diamide of oxalic acid obtained by means a process wherein copper catalysts are used, by means of the washing with aqueous solutions of an ammonium salt of an organic or inorganic acid, operating at a pH value comprised within the range of from 2 to 8, and at a temperature comprised within the range of from 40 to 150°C.
本发明公开了一种
草酸二酰胺的提纯工艺,该工艺使用
铜催化剂,用有机酸或
无机酸的
铵盐
水溶液进行洗涤,pH 值在 2 至 8 之间,温度在 40 至 150 摄氏度之间。