朱旭 1张文瑾 1陈军 2黄河 1庞思平 1孙成辉1
作者信息
- 1. 北京理工大学 材料学院,北京 100081
- 2. 湖北东方化工有限公司,湖北 襄阳 441022
- 折叠
摘要
Abstract
2,4-Dinitroanisole(DNAN)has emerged as a novel insensitive melt-cast carrier explosive,serving as a practical and effective replacement for TNT in various applications.However,the conventional batch reactor synthesis method is plagued by several limitations,including prolonged reaction duration,excessive in-process inventory,and significant generation of byprod-ucts,which collectively restrict its safe and efficient large-scale production.Consequently,developing advanced preparation pro-cesses has become imperative.This study investigates the synthesis of DNAN employing a reaction system comprising 2,4-dini-trochlorobenzene(2,4-DNCB),methanol,and sodium hydroxide,with a particular focus on continuous flow technology and reaction kinetics.Through mechanistic simulations,a kinetic reaction model was successfully established.The experimental ki-netic results indicate that the etherification of 2,4-DNCB follows second-order reaction kinetics,where the reaction rate is pro-portional to the product of the concentrations of 2,4-DNCB and NaOH.Key kinetic parameters were determined as follows:Ac-tivation energy(Ea):73.950 kJ·mol-1.Pre-exponential factor(A0):7.991×1010 L·mol-1·s-1.The effects of critical process vari-ables—namely,reaction temperature,residence time,and molar ratio of reactants—on the product purity and yield were sys-tematically investigated.The optimal reaction conditions were identified as:Reaction temperature is 90℃.Residence time is 1 min.Molar ratio(2,4-DNCB∶NaOH)is 1.6∶1.Under these optimized conditions,DNAN was obtained with a yield of 93.7%and a purity exceeding 99.99%.This research provides a robust theoretical foundation and practical methodology for the continu-ous and efficient production of DNAN.关键词
2,4-二硝基苯甲醚(DNAN)/连续流工艺/反应动力学/工艺优化/模拟计算Key words
2/4-dinitroanisole(DNAN)/continuous flow/reaction kinetics/process optimization/computational simulation分类
军事科技
