The preparation of anhydrous acetaldoxime from an aqueous solution by gaseous extraction using methylene chloride as extracting agent was studied.

• 研究以二氯甲烷为萃取剂，利用汽相萃取由乙醛肟水溶液制备无水乙醛肟的工艺过程，所得乙醛肟贮存稳定性好，含量在99%25以上，收率达93%25。