2，4－滴的合成新研究  

Synthesis of 2 , 4-Dichlorophenoxyacetic Acid

作　　者：吕耀宏[1] 陈艳月[1] 

机构地区：[1]浙江大学杭州开源科技实业公司

出　　处：《农药》1996年第7期14-15,共2页Agrochemicals

摘　　要：以工业苯酚、氯乙酸为原料，采用先缩合后氯化的合成新技术，中间体不经分离直接氯化制２，４－滴，总收率７６％，含量９８％（有效酸），熔点１３６．５～１４０．５℃。无二氯酚污染，流程短，成本低。his report was related to the preparation of 2 ,4-dichlorophenoxyacetic acid by condensation of phenol and technical chloroacetic acid followed by chloration. In the process,the intermediate need not to separate from the reaction solution. The total yield and purity were 76% and 98% (acid equivalent), and the melting point was 136. 5 ￣ 140.5℃. This method was simple and low cost, avoiding the polution by dichlorophenol.

关 键 词：合成 二氯苯氧基乙酸 除草剂 二四滴 

分 类 号：TQ457.21[化学工程—农药化工]