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Position: Home > Articles > Thermal Hazard and Reaction Kinetics for Synthesis Process of Clethodim Agrochemicals 2014,53 (2) 25-27+51

烯草酮合成工艺热危险性及动力学

作  者:
程春生;魏振云;李全国;马晓华
单  位:
沈阳科创化学品有限公司技术中心
关键词:
烯草酮;绝热温升;分解温度;热危险性;动力学
摘  要:
[目的]通过差示扫描量热-热重(DSC-TG)分析和反应量热(RC1),开展烯草酮合成工艺的热危险性和反应动力学研究。[结果]中间体O-3-氯-2-丙烯基羟胺分解温度为106.9℃,5-(2-乙硫基丙基)-2-丙酰基-3-羟基-2-环己烯-1-酮的吸热分解温度为273.3℃,烯草酮表现为吸热和放热2段分解过程,放热和吸热分解温度分别为120、268.2℃。烯草酮合成反应摩尔放热量为-49.03 kJ/mol,绝热温升为21.27 K,反应存在大量热累积。热失控条件下,反应体系最高温度(MTSR)为54.27℃,小于中间体、产品的分解温度和体系沸点,合成工艺的热危险性较小。烯草酮合成反应对O-3-氯-2-丙烯基羟胺的反应级数为1.21。
译  名:
Thermal Hazard and Reaction Kinetics for Synthesis Process of Clethodim
作  者:
CHENG Chun-sheng;WEI Zhen-yun;LI Quan-guo;MA Xiao-hua;Technical Center,Shenyang Sciencreat Chemicals Co.,Ltd.;
关键词:
clethodim;;adiabatic temperature rise;;decomposition temperature;;thermal hazards;;kinetic
摘  要:
[Aims] The thermal hazards and kinetics of synthesis reaction were tested by using Differential Scanning Calorimetry-Thermogravimetric analyzer(DSC-TG) and Reaction Calorimeter(RC1). [Results] The results indicated that the endothermic decomposition temperature of O-(3-chloro-2-propenyl)hydroxylamine is 106.9 °C, and 5-(2-(ethylthio)propy)-2-propionyl-3-hydroxy-2-cyclohexen-1-one is 273.3 °C, the exothermic and endothermic decomposition temperature of clethodim is 120 and 268.2 °C respectively. The exothermic energy of the synthesis reaction is-49.03 kJ/mol, the adiabatic temperature rise is 21.27 K, and the reaction has a lot of thermal accumulation. Under the thermal runaway condition, the maximum temperature of the synthesis reaction(MTSR) is 54.27 °C, which is below the thermal decomposition temperature of intermediate, product and the boiling point of the reaction system. This process has lower thermal hazard. The synthesis reaction order is 1.21 for O-(3-chloro-2-propenyl)hydroxylamine.

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