KOH沉淀剂对Ag／TS-1催化剂用于丙烯气相环氧化的影响  

Gas-phase propylene epoxidation with Ag/TS-1 catalyst prepared with different precipitator

作　　者：王金雪[1] 刘民[1] 刘冠锋[1] 郭新闻[1] 吴宏宇[1] 

机构地区：[1]大连理工大学精细化工国家重点实验室,化工学院催化化学与工程系,辽宁大连116024

出　　处：《现代化工》2011年第4期45-48,52,共5页Modern Chemical Industry

摘　　要：采用沉积-沉淀法制备Ag/TS-1催化剂,在423 K、常压条件下用于丙烯气相环氧化反应,研究了碱金属沉淀剂KOH的影响。结果表明,以KOH为沉淀剂、TS-1为载体制备的Ag/TS-1催化剂反应性能最佳,丙烯转化率为1.8%,环氧丙烷选择性为91.7%;K+的存在对反应有促进作用。Gas-phase propylene epoxidation with Ag/TS-1 catalyst prepared by deposition-precipitation method is studied. The effect of precipitator of KOH is investigated at 423 K and ambient pressure. Ag/TS-1 catalyst is characterized by TEM, XRD and UV-Vis. The results show that propylene conversion of 1.8% and PO selectivity of 91.7% are obtained with Ag/TS-I catalyst prepared with 5 × 10 ^-2 mol/L KOH as precipitator. This catalyst shows good stability.

关 键 词：银 丙烯环氧化 环氧丙烷 沉淀剂 钾 

分 类 号：O643.36[理学—物理化学]