TY - JOUR
T1 - Shape selective methylation of 4-methylbiphenyl with methanol over MgO/HZSM5
AU - Guo, Xinwen
AU - Shen, Jian Ping
AU - Sun, Lu
AU - Song, Chunshan
AU - Wang, Xiangsheng
PY - 2003/9
Y1 - 2003/9
N2 - The effects of catalyst activation and the reaction conditions on the methylation of 4-methylbiphenyl (4-MBP) with methanol over MgO/CBV8020 were investigated. With an increase in the reaction temperature, the conversion of 4-MBP decreased and the selectivity to 4,4′-dimethylbiphenyl (4,4′-DMBP) first increased, then decreased. With an increase in the reaction temperature, the isomerization of 4-MBP into 3-MBP increased, as well as the isomerization of 4,4′-DMBP into 2,3′- and 3,4′-DMBP. The effect of reaction time on the methylation of 4-MBP with methanol showed that both the conversion of 4-MBP and the selectivity to 4,4′-DMBP decreased with reaction time. Moreover, the addition of water in the feed did not favor methylation of 4-MBP with methanol. With an increase in the amount of mesitylene, both the selectivity to 4,4′-DMBP and 4-MBP conversion increased a little. However, the activity stability improved a lot, after 375 min reaction, the selectivity to 4,4′-DMBP was ∼ 80%, and 4-MBP conversion was ∼ 8%.
AB - The effects of catalyst activation and the reaction conditions on the methylation of 4-methylbiphenyl (4-MBP) with methanol over MgO/CBV8020 were investigated. With an increase in the reaction temperature, the conversion of 4-MBP decreased and the selectivity to 4,4′-dimethylbiphenyl (4,4′-DMBP) first increased, then decreased. With an increase in the reaction temperature, the isomerization of 4-MBP into 3-MBP increased, as well as the isomerization of 4,4′-DMBP into 2,3′- and 3,4′-DMBP. The effect of reaction time on the methylation of 4-MBP with methanol showed that both the conversion of 4-MBP and the selectivity to 4,4′-DMBP decreased with reaction time. Moreover, the addition of water in the feed did not favor methylation of 4-MBP with methanol. With an increase in the amount of mesitylene, both the selectivity to 4,4′-DMBP and 4-MBP conversion increased a little. However, the activity stability improved a lot, after 375 min reaction, the selectivity to 4,4′-DMBP was ∼ 80%, and 4-MBP conversion was ∼ 8%.
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M3 - Conference article
AN - SCOPUS:1042289954
VL - 48
SP - 902
EP - 903
JO - Am Chem Soc Div Fuel Chem Prepr
JF - Am Chem Soc Div Fuel Chem Prepr
SN - 0569-3772
IS - 2
ER -