不同沸石分子筛对乙基叔丁基醚合成反应的催化性能  

Catalytic Performance of Different Zeolites for Synthesis of Ethyl Tertiary Butyl Ether

作　　者：李自运[1] 朱岩 项寿鹤[1] 

机构地区：[1]南开大学化学学院新催化材料科学研究所,天津300071

出　　处：《催化学报》2003年第4期294-298,共5页

基　　金：国家自然科学基金 (2 9973 0 17;2 0 2 3 3 0 3 0 );教育部南开大学;天津大学科技合作基金项目

摘　　要：研究了液相、加压条件下 ,不同沸石分子筛对低温合成乙基叔丁基醚 (ETBE)的催化性能 .发现Hβ沸石的催化活性与A 35树脂催化剂的相当 ,远远高于其他沸石分子筛催化剂 .醇 /烯比对Hβ分子筛催化剂及A 35催化剂上ETBE的合成影响比较大 .但是Hβ沸石分子筛上ETBE的选择性基本不受醇 /烯比的影响 ,而醇 /烯比对树脂催化剂上ETBE的选择性影响相对较大 .加入粘合剂后 ,Hβ沸石分子筛催化剂的活性有所下降 ,但是加入致孔剂后 ,其活性有所提高 .加入 5 %聚乙二醇 4 0 0 0后 ,在温度高于 6 5℃时 ,Hβ沸石的催化活性已经与A 35的相当 ,在某些温度下 ,甚至高于AThe synthesis of ethyl tertiary butyl ether (ETBE) from isobutene and ethanol has been investigated on different zeolite catalysts at temperatures from 45 to 90 ℃ and pressures from 1 3 to 1 8 MPa. The Hβ zeolite was found to be as active as the A 35 resin catalyst, and be noticeably superior to HMCM 22, HZSM 5 and HY. The activity of the zeolites followed the sequence: Hβ>HMCM 22>HZSM 5>HY. Compared with the A 35 resin catalyst, the Hβ zeolite is less sensitive to the ethanol/isobutene ratio, and has better selectivity for ETBE. Bonding agents, such as pseudoboehmite, can decrease the catalytic activity of zeolite Hβ, while pore making agents, such as polyethylene glycol, can increase the activity of the bonded Hβ zeolite catalyst. The catalyst sample with 5% polyethylene glycol 4000 as pore making agent even had higher activity than the A 35 resin catalyst at temperatures higher than 65 ℃.

关 键 词：沸石分子筛 乙基叔丁基醚 合成 催化性能 乙醇 异丁烯 粘合剂 

分 类 号：O643.3[理学—物理化学]