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Position: Home > Articles > Preparation of Sodium 3,5,6-Trichloropyridin-2-ol by 2,3,5,6-Tetrachloropyridine Hydrolysis under Elevated Pressure Agrochemicals 2008,47 (1) 31-33

2,3,5,6-四氯吡啶加压水解制备3,5,6-三氯吡啶-2-醇钠

作  者:
刘宁;崔洪友;姚德
单  位:
山东理工大学化学工程学院
关键词:
2,3,5,6-四氯吡啶;3,5,6-三氯吡啶-2-醇钠;加压;水解
摘  要:
研究了加压条件下2,3,5,6-四氯吡啶(TCP)在间歇反应器中水解制备3,5,6-三氯吡啶-2-醇钠(STCP)的反应过程,考察了反应温度、压力、反应时间和原料配比对STCP收率的影响规律。结果表明,反应温度是影响水解速率的主要因素。得到了TCP水解制取STCP的优化工艺条件:TCP与氢氧化钠摩尔比约为1∶4,反应温度140℃左右,反应时间3h,收率达95%以上,产品纯度可达99%以上。
译  名:
Preparation of Sodium 3,5,6-Trichloropyridin-2-ol by 2,3,5,6-Tetrachloropyridine Hydrolysis under Elevated Pressure
作  者:
LIU Ning,CUI Hong-you,YAO De (School of Chemical Engineering,Shandong University of Technology,Zibo 255049,Shandong,China)
关键词:
2,3,5,6-tetrachloropyridine;sodium 3,5,6-trichloropyridin-2-ol;elevated pressure;hydrolysis
摘  要:
Effects on reaction temperature,pressure,time and material mole ratio on the hydrolysis of 2,3,5,6- tetrachloropyridine(TCP)for preparing sodium 3,5,6-trichloropyridin-2-ol(STCP)were investigated under elevated pressures in a batch reactor.The results showed that hydrolysis temperature is a crucial factor to control the reaction rate.The preferred condition for preparation of STCP by TCP hydrolysis is that TCP reacts with NaOH for 3 h with a mole ratio of TCP/NaOH=1:4 at 140oC,affording a STCP yield of higher than 95% with purity of STCP up to 99%.

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