摘要
研究以对甲砜基甲苯(MST)为原料,合成2-硝基-4-甲砜基苯甲酸(NMSBA)的硝化及氧化反应危险性。采用反应量热仪(RCl_(mx))、差示扫描量热仪(DSC)和绝热加速量热仪(ARC)对硝化反应、原料和硝化液的热分解过程进行测试,并利用模拟软件理论计算氧化反应焓值。结果表明:DSC测得原料MST的分解热为495.04J/g,分解放热量等级为2级;ARC测得硝化反应液绝热条件下最大反应速率到达时间(TMR_(ad))>24h,绝热条件下最大反应速率到达24h对应的温度(T_(d24))为116.92℃;RCl_(mx)测得硝化过程绝热温升△T_(ad)为165.1℃,硝化反应的最大累积度为10.99%,发生冷却失效时,体系所能达到的最高温度(MTSR)为38.14℃;根据软件模拟,氧化反应MTSR为175.30℃。
The reaction risk of the nitration and oxidation of 2-nitro-4-methylsulfonylbenzoic acid(NMSBA)synthesized from p-methylsulfonyltoluene were studied.Reaction calorimeter(RCl_(mx)),differential scanning calorimeter(DSC)and adiabatic acceleration calorimeter(ARC)were used to measure the nitrification reaction,the thermal decomposition of raw materials and nitrifying solution,the enthalpy of oxidation reaction was calculated by simulation software.The results showed that the decomposition heat of p-methylsulfonyltoluene(MST)was 495.04J/g by DSC,and the decomposition heat of MST was grade 2 by ARC,the adiabatic temperature rise△T_(ad) of the nitrification process was 165.1C,and the maximum accumulation degree of the nitrification reaction was 10.99%,the MTSR(the highest temperature that the system can reach when cooling failure occurs,the same below)was 38.14℃,and the MTSR was 175.30℃according to the software simulation.
作者
彭艳丽
范李科
李美美
程丽华
杨一佳
周红鹏
张庆欢
底伟平
PENG Yan-li;FAN Li-ke;LI Mei-mei;CHENG Li-hua;YANG Yi-jia;ZHOU Hong-peng;ZHANG Qing-huan;DI Wei-ping(Hebei Chengxin Group Co.,Ltd.,Shijiazhuang 051130,China;Hebei Lingang Chemical Co.,Ltd.,Cangzhou 061108,China;Hebei Innovation Center of Cyanide Derivatives Technology,Shijiazhuang 051130,China;Hebei Province Cyanide and Derivatives Research&.Application Industrial Technology Research Institute,Shijiazhuang 051130,China)
出处
《精细与专用化学品》
CAS
2024年第4期14-17,23,共5页
Fine and Specialty Chemicals
关键词
硝化
对甲砜基甲苯
氧化
2-硝基-4-甲砜基苯甲酸
nitrification
p-methylsulfonyltoluene
oxidation
2-nitro-4-methylsulfonylbenzoic acid
