2,3,5-三氯吡啶醇钠的合成收率影响因素分析  

2,3,5-Trichloropyridine Synthetic Analysis That the Yield Factors Influencing

作　　者：李战学 韩喜民 翟玉鹏 

机构地区：[1]山西阳煤丰喜肥业集团有限责任公司,山西运城044000

出　　处：《乙醛醋酸化工》2013年第5期11-13,共3页Acetaldehyde Acetic Acid Chemical Industry

摘　　要：本文着重研究了农药中间体2,3,5-三氯吡啶醇钠的合成影响因素。以三氯乙酰氯和丙烯晴为原料,在一定反应条件下生成长链烃后再加入催化剂氯化锌反应制得四氯吡啶,再加入氢氧化钠溶液生成2,3,5-三氯吡啶醇钠。本文研究了反应温度、时间、催化剂用量及碱液质量分数等条件对2,3,5-三氯吡啶醇钠收率的影响,并采用分步精馏分离出反应产物,不仅使后处理步骤减少,而且产品收率提高,制得三氯吡啶醇钠纯度85%以上。This research focuses on the synthesis influence factors of pesticide intermediates 2,3,5-trichloropyridine.With trichloro-acetic chlorine as the raw materials, long chain hydrocarbon produced in certain reaction conditions and catalyst zinc be added to react for tetrachloropyridine, then add sodium hydroxide solution to produce 2, 3, 5-trichloropyridine. This paper studies the influence on conditions as reaction temperature, time, and zinc chloride dosage and alkali liquor mass fraction toward 2,3,5-trichloropyridine yield coefficient, and adopt the step-by-step rectification to separate reaction product so that decrease post-processing steps and increase yield coefficient, then the purity of trichloropyridine produced is more than 85%.

关 键 词：2 3 5-三氯吡啶醇钠 四氯吡啶酮 合成 精馏 

分 类 号：TQ453[化学工程—农药化工]