微量Fe3+对过氧化氢异丙苯热稳定性影响研究

为研究微量铁离子（Fe³⁺）对过氧化氢异丙苯（CHP）热稳定性的影响，采用绝热加速量热仪（ARC）对CHP及含4种不同浓度Fe3+的CHP进行了绝热分解测试，测试分析了5个样品在绝热条件下的起始分解温度（To,s）、绝热温升（ΔTad,s）、最大温升速率（mm,s）和最大温升速率到达时间（θm,s）等参数，并利用热惰性因子Φ对实验数据进行了修正。研究结果表明:在绝热条件下，微量Fe3+的存在对CHP分解的To,s，ΔTad,s，mm,s和θm,s均有较大影响，且浓度不同对各参数的影响不一样；Fe³⁺的存在增加了CHP分解的剧烈程度，且浓度越大，CHP分解越剧烈，其热分解失控可能性越大，危险性越高；储存运输CHP时要避免与高浓度的Fe³⁺接触。研究结果可为CHP的热稳定性安全提供一定参考。

Study on influence of trace Fe3+ on thermal stability of cumene hydroperxide

In order to study the influence of trace iron ion (Fe³⁺) on the thermal stability of cumene hydroperoxide (CHP), the adiabatic decomposition tests were carried out on CHP and CHP containing Fe³⁺ with four different concentrations by using the adiabatic accelerating rate calorimeter. The parameters including the initial decomposition temperature (To,s), the adiabatic temperature rise (ΔTad,s), the maximum temperature rise rate (mm,s) and the time reaching the maximum temperature rise rate (θm,s) of five samples under the adiabatic conditions were studied, and the experimental data were corrected by using the thermal inertia factor (Φ). The results showed that under the adiabatic conditions, the existence of trace Fe³⁺ had great influence on To,s, ΔTad,s, mm,s and θm,s of CHP decomposition, and the influence on each parameter varied with different concentrations of Fe3+. The existence of Fe³⁺ increased the severity of CHP decomposition, the greater the concentration, the more severe the CHP decomposition, the greater the possibility of out of control of thermal decomposition, and the higher the risk. The contacting to Fe3+ with high concentration should be avoided when storing and transporting CHP. The results can provide a certain reference for the thermal stability safety of CHP.