Health & Environmental Research Online (HERO)


Print Feedback Export to File
5239338 
Journal Article 
Alkylation of toluene with propylene to produce para-cymene 
Wang, SY; Tan, CS 
2001 
Yes 
Journal of the Chinese Institute of Chemical Engineers
ISSN: 0368-1653 
CHINESE INST CHEMICAL ENGINEER 
TAIPEI 
32 
4 
319-325 
English 
WOS:000170999200005 
Alkylation of toluene with propylene over HZSM-5 pellets and HZSM-5 pellets modified by the chemical liquid deposition of SiCl4 was performed in this study. The modification was made by adding a mixture of SiCl4 and hexane to the parent HZSM-5 pellets containing 14% of water. Under the most appropriate operating conditions for alkylation, which were a temperature of 523 K, a weight hourly space velocity of 4.6 (g of toluene)/(g of catalyst)/h, and a molar ratio of toluene to propylene of 7.7, the p-cymene selectivity and yield obtained using the modified HZSM-5 pellets were much higher than those obtained using the parent ones. The experimental data indicate not only that the p-cymene selectivity could exceed 90% as it increased with time during a sixty-hour run using the modified pellets, but also that the yield increased as the reaction proceeded. 
alkylation; para-cymene; toluene; propylene; HZSM-5; chemical liquid deposition; selectivity; yield