摘要
为充分研究苯乙烯合成聚苯乙烯在工业化生产过程的反应热危害,采用反应量热仪、差示扫描量热仪、绝热加速量热仪对聚合反应过程、完成料和原料放热速率等热力学数据进行了测定和评估。实验结果表明:苯乙烯、过氧化苯甲酸叔丁酯、过氧化苯甲酰热稳定性差,自反应温度分别为144.9,124.4,105℃,产品聚苯乙烯二次分解的温度为286.3℃。该反应苯乙烯聚合过程中绝热温升为89.6℃,反应体系失控状态时积累的热量在绝热状态下可能达到的最高温度为212.6℃,根据冷却失效情形评估方法,该反应的工艺危险度为3级,反应过程热危险性较大,需要进一步采取安全技术措施降低风险。
In order to study the thermal hazards and prevent accidents of polystyrene synthesis,Reaction calorimeter,differential scanning calorimetry and Application of accelerating rate calorime were used to investigate the thermodynamic data of polymerization process,exothermic rate of finished material and raw material.The results showed that the thermal stability of styrene,tert butyl peroxide and benzoyl peroxide was poor,the self reaction temperature was 144.9,124.4and 105℃respectively,and the secondary decomposition temperature of polystyrene was 286.3℃.The adiabatic temperature rise is 89.6℃in the process of styrene polymerization,When the reaction system is out of control,the maximum temperature of heat accumulation in adiabatic state is 212.6℃.According to the evaluation method of cooling failure,the process risk of the reaction is grade 3,Therefore,the thermal runway risk of this reaction is high and further safety technical measures should be taken to reduce the risk.
作者
曾晓飞
卜孝祥
余海华
徐道明
Zeng Xiaofei;Pu Xiaoxiang;Yu Haihua;Xu Daoming(Sinosteel Maanshan General Institute of Mining Research Co.,Ltd.,Maanshan 243000,China;State Key Laboratory of Safety and Health for Metal Mine,Maanshan 243000,China;He County Emergency Management Bureau,Maanshan 243000,China;Anhui Hongyuan Chemical Technology Co.,Ltd.,Maanshan 243000,China)
出处
《山东化工》
CAS
2021年第24期145-147,150,共4页
Shandong Chemical Industry
关键词
聚苯乙烯
反应热
量热仪
工艺危险度
polystyrene
thermal hazard
calorimetry
process risk of the reaction
作者简介
曾晓飞,硕士,工程师,研究方向:化工过程安全评价。
