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Position: Home > Articles > Thermal Hazard and Establishment of Kinetics Model for 5-Ethyl Pyridine-2,3-dicarboxylic Acid Diethyl Ester Agrochemicals 2015,54 (4) 257-259

5-乙基吡啶-2,3-二羧酸二乙酯热风险及动力学模型建立

作  者:
程春生;李全国;魏振云;马晓华
单  位:
沈阳科创化学品有限公司
关键词:
间歇式;合成;有机化合物;反应风险;反应热;反应动力学
摘  要:
[目的]通过反应量热和绝热加速量热,对关键中间体5-乙基吡啶-2,3-二羧酸二乙酯的合成进行反应风险研究,建立动力学模型。[结果]5-乙基吡啶-2,3-二羧酸二乙酯热稳定性差,热分解温度为372.48 K,分解过程放出气体。摩尔反应热△rH_m为253.65 kJ/mol,反应的绝热温升△T_(ad)为88.35 K,热失控情况下体系最高温度MTSR可达366.30 K,存在潜在热失控乃至爆炸风险。合成反应动力学方程为r_A=5.60×10~(-1)C_A~(1.01)。合成反应对α-氯代草酰乙酸二乙酯的反应级数为1.01。
译  名:
Thermal Hazard and Establishment of Kinetics Model for 5-Ethyl Pyridine-2,3-dicarboxylic Acid Diethyl Ester
作  者:
CHENG Chun-sheng;LI Quan-guo;WEI Zhen-yun;MA Xiao-hua;Shenyang Sciencreat Chemicals Company Limited;
关键词:
batchwise;;synthesis;;organic compound;;reaction hazard;;reaction heat;;reaction kinetics
摘  要:
[Aims]The accelerating rate calorimeter and reaction calorimeter were used to measure the thermal hazard parameters for 5-ethyl pyridine-2,3-dicarboxylic acid diethyl ester.The reaction kinetics model was established.[Results]5-Ethyl pyridine-2,3-dicarboxylic acid diethyl ester was not stable when heated,with gas generation started from the decomposition temperature of 372.48 K.The molar reaction heat and adiabatic temperature rise of the synthesis reaction were 253.65 kJ/mol and 88.35 K,respectively.The maximum temperature of the synthesis reaction(MTSR) was366.30 K,which indicated the chemical reaction has the potential risks of thermal runaway or explosion further when cooling failure.The kinetic equation of the synthesis reaction for 5-ethyl pyridine-2,3-dicarboxylic acid diethyl ester was r_A=5.60×10~(-1)C_a~(1.01) and the reaction order was 1.01 for main material of 2-chloro-3-oxo-succinic acid diethyl ester.

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