以Nafion为催化剂的异丁烯齐聚反应的研究

以Nafion为催化剂的异丁烯齐聚反应的研究

周硼¹，安增建¹，李文艳²，贺民¹ ，王新平¹，蔡天锡¹

1. 大连理工大学化工学院精细化工重点实验室，大连 116012； 2. 吉林大学环境与资源学院，长春 130023

收稿日期:2002-11-18 修回日期:1900-01-01 出版日期:2003-04-26 发布日期:2003-04-26
通讯作者: 蔡天锡

A Study of Isobutene Oligomerization over Nafion

ZHOU Peng¹, AN Zeng-jian¹, LI Wen-yan², HE M in¹, WANG Xin-ping¹, CAI Tian-xi¹

1. State Key Laboratory of Fine Chemicals, School of Chemical Engineering, Dalian University of Technology, Dalian 116012, China; 2. College of Environment and Resources, Jilin University, Changchun 130023, Chi na

Received:2002-11-18 Revised:1900-01-01 Online:2003-04-26 Published:2003-04-26
Contact: CAI Tian-xi

摘要/Abstract

摘要： 考察了反应温度、空速对Nafion催化异丁烯齐聚反应的影响. 探讨了催化剂在反应中的稳定性和变化特点. 在30～60 ℃范围内，异丁烯的转化率随反应温度升高迅速增加，低温时液体产物以二聚体为主. 当反应温度高于60 ℃时异丁烯转化率大于86%，液体产物以三聚体为主. Nafion的催化活性随可接近磺酸基团的增加而提高. 高温有利于提高Nafion的溶胀度，使体相内的磺酸基团更易接近. 由温度变化引起磺酸基团浓度稳定增加但可逆，经低温处理后可以复原. 将Nafion担载在大比表面的载体上, 在低温下可获得更多的异丁烯二聚体.

关键词: 异丁烯, 齐聚, 固体酸, Nafion

Abstract: The effects of reaction conditions, such as temperature, space velocit y have been investigated in liquid-phase isobutene oligomerization over Nafion at 1.8 MPa. The catalyst stability and the character in the reaction have been discussed also. The isobutene conversion is enhanced with the increase of reacti on temperature rapidly in the range of 30～60 ℃, and the main liquid products a re the dimmer; whereas the main products are the trimmer at the reaction temper ature higher than 60 ℃, the isobutene conversion is higher than 86%. The catalytic activity of Nafion increases with the increasing of accessible sulfonic group. High temperature profits to en hance the swelling capacity of Nafion and makes the bulk phase more accessible. Furthermore, the increase of accessible acid sites caused by temperature is sta ble and irreversible. It can be restored by lower temperature treatment for long time. More diisobutene can be obtained at a low temperature over silica-suppor ting Nafion.

Key words: isobutene, oligomerization, solid acid, Nafion

中图分类号:

TQ032.41

周硼，安增建，李文艳，贺民，王新平，蔡天锡. 以Nafion为催化剂的异丁烯齐聚反应的研究[J]. J4, 2003, 41(02): 217-220.

ZHOU Peng, AN Zeng-jian, LI Wen-yan, HE M in, WANG Xin-ping, CAI Tian-xi. A Study of Isobutene Oligomerization over Nafion[J]. J4, 2003, 41(02): 217-220.