摘要
研究了噻吩、2-甲基噻吩、3-甲基噻吩和2,5-二甲基噻吩等硫化物与己烯进行烷基化反应的性能.结果发现,它们进行一次烷基化反应的能力都比较强,在实验条件下转化率几乎都达到了100%.但噻吩衍生物与己烯进行二次以至多次烷基化反应的能力则随着噻吩环上支链的增加逐渐减弱,原因可能来自噻吩衍生物继续进行烷基化反应的热力学条件不利,以及环上已有侧链的空间位阻效应.噻吩衍生物发生深度烷基化反应能力的减弱导致了另外两个并行竞争反应芳烃烷基化和烯烃烷基化(聚合)的反应程度增强,表现为芳烃转化率和己烯聚合量的升高,以及各自二次烷基化产物相对含量的增加.
The alkylation performance of thiophene and its derivatives （such as 2-methykhiophene, 3-memynniophene, and 2,5-dimethylthiophene） with 1-hexene was investigated in a fixed-bed reactor. The results showed that thiophene and its derivatives could be mono-alkylated with 1-hexene easily, and their conversion was close to 100 % under experimental conditions. However, with the increase of the number of the branched chain on the thiophene ring, the di- and tri-alkylation capability of thiophene derivatives decreased a lot because of the ther modynamics and steric effects, and their primary products are restricted to the mono-alkylated products. The decrease in alkylation capability of thiophene derivatives enhanced the other two parallel competitive reactions, the aromatics alkylation and hexene alkylation （or called hexene oligomerization）- The relative content of their further alkylated products was even more than that of the mono-alkylated products during the alkylation of dimethylthiophene.
出处
《催化学报》
SCIE
EI
CAS
CSCD
北大核心
2006年第4期309-313,共5页
基金
国家重点基础研究发展计划(973计划)资助项目(2003CB615802)
关键词
噻吩
噻吩衍生物
烷基化
汽油
脱硫
thiophene
thiophene derivative
alkylation
gasoline
desulfurization
