化工进展Issue(10)：2655-2660,6.DOI:10.3969/j.issn.1000-6613.2014.10.022
C25沸石分子筛催化合成2-乙酰噻吩连续反应
Continuous synthesis of 2-acetyl thiophene with C25 zeolite molecular sieve
酆月飞 1曾爱武1
作者信息
- 1. 天津大学化工学院化学工程联合国家重点实验室，天津 300072
- 折叠
摘要
Abstract
With C25 zeolite molecular sieve as catalyst,thiophene and acetic anhydride as raw materials,continuous synthesis of 2-acetyl thiophene was conducted in a trickle bed reactor. The effects of reaction temperature,molar ratio of raw materials,feed flow rate on the Friedel-Crafts acylation reaction were investigated via orthogonal experiment. The optimum reaction condition was:reaction temperature 70℃,molar ratio of thiophene and acetic anhydride 1∶2,feed flow rate 0.05mL/min. Considering the influence of acetic acid on the reaction,the best molar ratio of thiophene,acetic anhydride and acetic acid was 1∶2∶1. Under those conditions,output of 2-acetyl thiophene was 15.10g per unit mass of catalyst,catalyst service life was 4215 min and initial conversion of thiophene could reach 99.98%. The catalyst was characterized with 13C NMR MAS,27Al NMR MAS,and TGA analysis. Bronsted acid sites played an important role in catalysis and the main deactivation type was coking deactivation by compounds with high boiling point.关键词
2-乙酰噻吩/连续反应/分子筛/失活/催化Key words
2-acetyl thiophene/continuous reaction/molecular sieves/deactivation/catalyst分类
化学化工引用本文复制引用
酆月飞,曾爱武..C25沸石分子筛催化合成2-乙酰噻吩连续反应[J].化工进展,2014,(10):2655-2660,6.
