间二异丙苯一次氧化产物失控反应特性研究

间二异丙苯与空气发生一次氧化反应,是间二异丙苯氧化法制备间苯二酚的关键技术,采用DSC差式扫描量热仪和VSP2绝热量热仪等,研究间二异丙苯与空气反应生成一次氧化产物的热稳定性和绝热失控特性。结果显示:间二异丙苯与空气反应生成一次氧化产物的起始放热温度(T0)为129℃,绝热温升(ΔT ad)为222℃,最高失控压力(P max)为4.05 MPa,最大反应速率到达时间为24 h对应的温度(T D24)为49.6℃。在工业化实施时应优化工艺流程,在操作过程中严格控制反应温度,优化操作条件,以保证安全生产。

Study on Runaway Reaction Characteristics of Primary Oxidation Products of M-diisopropylbenzene

The primary air oxidation of m-diisopropylbenzene was the key technology for the preparation of resorcinol by m-diisopropylbenzene oxidation.The thermal stability,adiabatic runaway characteristics,loss of control kinetics and runaway initiation mechanism of m-diisopropylbenzene primary oxidation product system were studied by DSC and VSP2 adiabatic calorimeter.The results showed that the starting temperature(T 0)of runaway self-acceleration of the primary oxidation product of m-diisopropylbenzene was 129℃,the adiabatic temperature rise(ΔT ad)was 222℃,the maximum runaway pressure(P max)was 4.05 MPa,the maximum reaction rate arrival time was 24 hours,the corresponding temperature(T D 24)was 49.6℃.In order to ensure safety in production,the process flow should be optimized,the reaction temperature should be strictly controlled and the operation should be optimized.