摘要
利用二氧化锰650度下灼烧得到三氧化二锰；使用该原料与中等浓度的硫酸和甲苯在反应器内进行固、油、水三相反应，反应结束后甲苯氧化成为产品苯甲醛。油相蒸馏回收，分离出苯甲醛成品和没有反应的甲苯，甲苯用于循环使用；水相经活性碳吸咐处理循环使用；固相副产物（主要是硫酸锰）可作为成品出售。整个循环过程构成闭合的绿色化工生产工艺。同时在对反应的研究中发现三相氧化反应是复杂的连串反应，稳定期活化能为79kJ·mol-1。
： The manganese dioxide is transformed into manganese sesquioxide at 650°C, and then react with toluene to produce benzaldehyde in the existence of surphric acid in a three phase reactor. The organic phase and water phase can be reused respectively to form a green chemical technology. By-product of the processes is the manganese sulfate subsided from solid phase. The study on chemical reaction dynamics for liquid-liquid-solid reacting system has also been performed. The experimental results show that the reaction is very complex and follows a kind of zero kinetics at the steady state operation. The activation energy is about 79kJ·mol-1.
出处
《高校化学工程学报》
EI
CAS
CSCD
北大核心
2000年第5期448-452,共5页
Journal of Chemical Engineering of Chinese Universities
基金
上海市教委科技发展基金资助项目(98A31)。
关键词
苯甲醛
三氧化二锰
非均相反应动力学
benzaldehyde
manganese sesquioxide
chemical reaction dynamics
heterogeneous reaction
