低压固定床反应器中丙烯直接环氧化连续反应  

Epoxidation of Propylene and Hydrogen Peroxide in a Lower Pressure Continuous Fixed-Bed Reactor

作　　者：赵基钢[1] 沈本贤[1] 肖卫国[2] 张策[1] 王雷[1] 

机构地区：[1]华东理工大学化工学院,上海200237 [2]天津大沽化工股份有限公司,天津300455

出　　处：《华东理工大学学报（自然科学版）》2007年第1期23-27,共5页Journal of East China University of Science and Technology

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.

关 键 词：固定床反应器 环氧化 丙烯 钛硅分子筛 环氧丙烷 

分 类 号：TQ223.26[化学工程—有机化工]