丙烯酸热稳定性及三种阻聚剂的影响  

Thermal Stability of Acrylic Acid and Effect of Three Kinds of Polymerization Inhibitors

作　　者：邵英杰 李翠清[1] 陈思凝[2] 赵隧军 王如君[2] SHAO Ying-jie;LI Cui-qing;CHEN Si-ning;ZHAO Sui-jun;WANG Ru-jun(Beijing Institute of Petrochemical Technology,Beijing 102617,China;China Academy of Safety Science and Technology,Beijing 100012,China)

机构地区：[1]北京石油化工学院,北京102617 [2]中国安全生产科学研究院,北京100012

出　　处：《当代化工》2021年第12期2844-2848,共5页Contemporary Chemical Industry

基　　金：国家重点研发计划课题(项目编号:2016YFC0801502)。

摘　　要：丙烯酸行业属于高危行业,由于过热引发聚合而导致的火灾爆炸等工业危害事件屡有发生。利用绝热加速量热仪(ARC)对丙烯酸绝热条件下的放热特性进行了测试,测得丙烯酸在125.60℃时发生自聚反应,250.70℃时发生产物的分解反应;计算了放热过程的动力学参数,两段放热过程的表观活化能分别为94.7 kJ×mol^(-1)和209.9 kJ×mol^(-1),指前因子分别为1.6×10^(9) min^(-1)和6.8×10^(17) min^(-1);进行了反应失控的风险分析,发现分解反应失控的严重度更高,可达到3级,绝热状态下自聚反应结束时的温度不能引发分解反应失控;并对比了3种工业常用阻聚剂对丙烯酸热稳定性的影响,结果为对苯二酚和吩噻嗪的效果相当且优于4-甲氧基苯酚。Acrylic acid industry is a high-risk industry,industrial hazards such as fire and explosion caused by superheated polymerization occur frequently.The exothermic characteristics of acrylic acid under adiabatic condition were measured by adiabatic acceleration rate calorimeter(ARC),including the self-polymerization of acrylic acid at 125.60 ℃ and the decomposition reaction of the product at 250.70 ℃;the kinetic parameters of the exothermic process were calculated,the apparent activation energies of the two exothermic processes are 94.7 kJ×mol^(-1) and 209.9 kJ×mol^(-1) respectively and the pre-exponential factors are 1.6×10^(9) min^(-1) and 6.8×10^(17) min^(-1) respectively;The risk analysis of the reaction out of control was carried out,it was found that the severity of the decomposition reaction out of control was higher,reaching grade 3 and the temperature at the end of the self-polymerization reaction in the adiabatic state was difficult to cause the decomposition reaction out of control;the effect of three industrial polymerization inhibitors on the thermal stability of acrylic acid were compared.The results showed that hydroquinone and phenothiazine were equivalent,and better than 4-methoxyphenol.

关 键 词：丙烯酸 绝热加速量热仪 动力学参数 阻聚剂 

分 类 号：X937[环境科学与工程—安全科学]