超临界条件下甲基萘与甲醇烷基化反应

• 作者: 夏远亮 白雪峰 胡浩权
• 来源期刊: 磁流体发电情报
• 学科: 工学
• 关键词: 甲基萘 甲醇 烷基化反应 超临界条件 HZMS-5 分子筛催化剂
• 年，卷（期）: 2004,（3）
• 页码范围: 485-487
• 页数: 3页
• 分类号: TQ426

摘要

Alkylation of methylnaphthalene with methanol is one promising technology for producing 2,6-dimethylnaphthalene. When the alkylation is carried out under ambient pressure by using HZMS-5 catalysis, the reaction activity is very low and obvious deactivation of catalyst is observed in a short run.This paper aims at slowing down catalyst deactivation and improving reaction activity of alkylation of methylnaphthalene with methanol by taking advantage of some special properue: of supercritical fluids,such as higher solubility than gases and higher diffusivity than liquids. The results indicate that the reaction under supercritical condition will achieve high reaction activity and long catalyst life. When the reaction was carried out at 460℃ and 7.0MPa which is above the critical temperature and pressure of the inert reaction solvent, 1,3,5-trimethylbenzene, the reaction activity increased by 3 times and catalyst life was extended by 25 to 30 times than those under ambient pressure and at the same temperature.