摘要
采用管式反应器与间歇反应器串联的方式考察了2,4,6-三磺酸基间苯二酚(TSR)选择性硝化制备2-磺酸基-4,6-二硝基间苯二酚(DNRS)的过程。建立了三步串联硝化反应宏观动力学模型以及等温均相间歇反应器模型(BR),对实验数据进行优化拟合估计动力学参数:将获得的动力学参数应用于一维定态轴向扩散管式反应器模型(LM)中,并与实验值进行对比验证。结果表明,三步串联硝化反应的表观活化能分别为57.66,40.05,130.89 kJ/mol;轴向扩散降低了串联硝化反应中间产物的选择性及收率,目标产物DNRS的最大收率随着管式反应器管径的增加而减小。分析比较了LM模型与BR模型的计算结果,并对管式反应器的放大进行了模拟计算。研究结果可用于TSR硝化反应器的设计和过程的优化。
Nitration of2,4,6-trisulfonate resorcinol(TSR)in a tube and a batch reactor was carried out to produce2-sulfo-4,6-dinitroresorcin(DNRS).Nitration of TSR involves three reactions in series,and in addition,the nitration of the solvent,i.e.DMSO.Kinetics was established and the parameters obtained by fitting the experimental data from the batch reactor.The obtained kinetics was verified by the experiments on the tube reactor.Then simulation was performed for the tube reactor by assuming plug flow,and the results were compared to the case where dispersion effect due to laminar flow was considered.The results show that the temperate rise in the tube is negligible,and isothermal condition can be assumed.Because of the axial dispersion,increasing the tube diameter will decrease the yield of DNRS.However,the reaction temperature has more remarkable effect on the yield.
作者
张化良
曾涛
叶光华
周静红
周兴贵
Zhang Hualiang;Zeng Tao;Ye Guanghua;Zhou Jinghong;Zhou Xinggui(State Key Laboratory of Chemical Engineering, East China University of Science and Technology, Shanghai 200237, China)
出处
《化学反应工程与工艺》
CAS
CSCD
北大核心
2017年第3期193-198,242,共7页
Chemical Reaction Engineering and Technology
