高低温磷改性β分子筛及其烷基化反应性能研究
发布时间：2018-11-25 07:02
【摘要】：对常温和高温条件下的磷改性β分子筛进行热重、核磁共振和酸性分析,并考察其在苯与乙烯烷基化反应中的反应性能。结果表明:β分子筛高温条件下引入铵根离子后,其DTG曲线在220~230℃之间有一明显的失重峰出现,即铵根离子进入分子筛内部;其~(31)P MAS NMR和~(27)Al MAS NMR表征中在化学位移为-30.908和41.392处均有一强吸收峰,即β分子筛的骨架结构中有P(4Al)和Al(4P)四配位结构出现;其NH_3-TPD酸性增强,酸量增加。评价结果表明β分子筛高温条件下引入铵根离子后,其烷基化反应性能明显提高。
[Abstract]:The thermogravimetric, nuclear magnetic resonance (NMR) and acid analysis of phosphorous modified 尾 molecular sieve at room temperature and high temperature were carried out, and its reaction performance in the alkylation of benzene with ethylene was investigated. The results show that the DTG curve of 尾 molecular sieve with ammonium ion at high temperature has an obvious weight loss peak between 220 鈩，
本文编号：2355202
[Abstract]:The thermogravimetric, nuclear magnetic resonance (NMR) and acid analysis of phosphorous modified 尾 molecular sieve at room temperature and high temperature were carried out, and its reaction performance in the alkylation of benzene with ethylene was investigated. The results show that the DTG curve of 尾 molecular sieve with ammonium ion at high temperature has an obvious weight loss peak between 220 鈩，
本文编号：2355202
本文链接：https://www.wllwen.com/kejilunwen/shiyounenyuanlunwen/2355202.html
