Extraction separation of dichloropropanol

The dichloropropanol from the solution gained from allyl chloride chlorohydrination is separated by extraction.The extraction process is optimized by selecting triotyl phosphate as the extractor,choosing the mass ratio of the extractor to dichloropropanol as 0.6∶ 1,and dividing the extractor into 5 parts for 5 times’extraction.As a result,extraction yield reaches 99.8%.The oil layer obtained from extraction is saponified with 10%(wt.) caustic soda solution under the negative pressure,the saponification yield is above 93%.The extractor and the residual water from the saponification can be recycled and reused.