摘要
丙酮肟是一种优良的除氧剂。TS-1催化丙酮氨氧化合成丙酮肟是一种新型绿色工艺。借助高效液相色谱技术,研究了在TS-1分子筛催化下以氨、过氧化氢直接氧化丙酮为丙酮肟的本征反应动力学。在本实验条件下,TS-1催化剂平均粒径为200nm,内扩散可以忽略,当搅拌速度大于580r·min-1时,外扩散已基本消除,反应进入动力学控制区;反应对于丙酮、过氧化氢和氨的反应级数分别为0.87、0.05和1.0,反应活化能为101.88kJ·mol-1,反应指前因子为5.20×1013mol-0.92·L0.92·min-1。这可为TS-1催化-膜分离耦合制备丙酮肟过程开发提供基础数据。
Acetone oxime is an excellent deoxidant, and its preparation by acetone ammoximation over catalyst titanium silicalites-1 （TS-1） is a novel environmentally friendly technology. Using ammonia and hydrogen peroxide as the ammoximation agents, the intrinsic kinetics of the acetone ammoximation reaction over catalyst TS-1 to produce acetone oxime was investigated by the help of high-performance liquid chromatography （HPLC） technique. In our experiments, since the average particle size of the used TS-1 catalyst is about 200 nm, and the used stirring rates are over 580 r-min-x, both the effects of internal diffusion resistance and external diffusion on the ammoximation reaction can be ignored and the reaction is controlled only by the kinetics of ammoximation. Through the experiments, the orders of the reaction were found to be 0.87 with respect to acetone, 0.05 with respect to H2O2 and 1.0 with respect to NH3, respectively. The reaction activation energy found is 101.88 kJ.mol-1 and the pre-exponential factor found is 5.20×10^13 mol-0.92-L0.92 min-l. This study provides the fundamental data for preparing the acetone oxime by the process coupling the catalytic reaction over TS-I with its membrane separation.
出处
《高校化学工程学报》
EI
CAS
CSCD
北大核心
2009年第3期423-427,共5页
Journal of Chemical Engineering of Chinese Universities
基金
国家自然科学基金项目(20636020)
国家高技术研究发展计划(2007AA06A402)
作者简介
李朝辉（1975-），男,湖南长沙人,南京工业大学博士生。
通讯联系人：邢卫红。E-mailzxingwh@njut．edu．cn
