四氯间苯二腈结晶提纯实验  

Crystallization Purified Experiment for Chlorothalonil

作　　者：王先建[1] 宋磊[1] 马海洪[1] 

机构地区：[1]天津大学石油化工技术开发中心,天津300072

出　　处：《农药》2008年第3期179-181,共3页Agrochemicals

摘　　要：考察了四氯间苯二腈在不同溶剂中的结晶提纯效果,选择了乙醇和间二甲苯质量比为7∶3的复合溶剂作为结晶提纯溶剂。四氯间苯二腈经结晶提纯后产品结晶度较好,粒度较大,纯度≥99%,单程收率≥90%,主要杂质六氯苯含量≤20mg/L。所研究开发的工艺可直接用于工业生产。The purified effects of chlorothalonil crystallization in different solvents were studied, ethanol-m-xylene mixture （mass ratio： ethanol/m-xylene=7/3） was selected as crystallization solvent. After crystallization purification, the crystallinity of the product was better and the granularity was larger, the purity of the product was up to 99% and the yield up to 90%, the content of the main impurity hexachlorobenzene was less than 20 mg/L. The researched technology can be used directly in industrial production.

关 键 词：四氯间苯二腈 结晶提纯 

分 类 号：TQ455[化学工程—农药化工]