氯油制备氯仿联产二甲基甲酰胺

Preparation of Chloroform United Production Dimethyl Formamide with Chlorine Oil

研究了氯油加碱除酸后和二甲胺水溶液反应制备氯仿和N,N-二甲基甲酰胺(DMF)的新工艺路线,通过正交实验对工艺条件进行优化,得到的优化合成工艺条件为:反应温度为50℃,保温反应时间为60min,n(二甲胺)∶n(氯油)=1∶1.10。在此条件下,氯仿-醛收率为94.02%,DMF-醛收率为92.05%。新工艺小试产品和氯仿质量达到国标GB4118-92优等品要求,DMF产品达到HG2028-91标准要求。

A new synthesis process for chloroform and dimethylformamide by the reaction of alkalizing and deacidifying chlorine oil and dimethylamine was studied. The process conditions were optimized by orthogonal experiments as follows： the reaction temperature was 50℃, the holding time 60 min, dimethylamine and chlorine oil ingredient mol ratio 1 ： 1.10.Under the conditions, the yield of chloroform-aldehyde and DMF-aldehyde was 94.02% and 92.05%, respectively. The quality of pilot product produced by the new process is better than that of the product produced by lime process, the quality of chloroform met the high-class required by National Standard GB 4118 -92, DMF products met the requirement of HG 2028 - 91.