摘要
在固定床反应器中,以自制挤条成型的ZSM-5型含钛(TS-1)分子筛为催化剂,采用丙烯气相进料,并预先与双氧水的甲醇溶液混合,系统考察了液体空速、丙烯与过氧化氢摩尔比、反应温度、双氧水甲醇混合溶液中双氧水浓度以及水含量等工艺条件对丙烯直接环氧化连续反应的影响。结果表明:当反应压力为0.7MPa,反应温度为50℃,进料中wH2O2=0.015,进料液体的质量空速为48h-1时,双氧水的转化率和环氧丙烷的选择性分别在90%和85%以上。
Gas-propylene was epoxidized with dilute methanol solutions of hydrogen peroxide in a fixed-bed reactor using self-made titanium-containing molecular sieve of ZSM-5 type (Model TS-1) as catalyst. The technology conditions such as the liquid space-velocity, mole ratio of propylene to hydrogen peroxide, temperature and contents of hydrogen peroxide in methanol solutions, which would determine the epoxidation rate, were studied systematically. The experimental results show that when the reaction pressure is 0.7 MPa, reaction temperature is 50℃, mass content of hydrogen peroxide in methanol solutions is about 1.5%, liquid mass space velocity is 48 h^-1 , the conversion of hydrogen peroxide and selectivity of propylene oxide are more than 90% and 85 %, respectively.
出处
《华东理工大学学报(自然科学版)》
EI
CAS
CSCD
北大核心
2007年第1期23-27,共5页
Journal of East China University of Science and Technology