TY - JOUR
T1 - Shape-selective synthesis of 4,4′-dimethylbiphenyl. 1. Methylation of 4-methylbiphenyl over modified zeolite catalysts
AU - Shen, Jian Ping
AU - Sun, Lu
AU - Song, Chunshan
PY - 2000/3
Y1 - 2000/3
N2 - Methylation of 4-methylbiphenyl with methanol was carried out using zeolites HY, HM, and HZSM-5 as catalysts under fixed-bed down-flow conditions. HY and HM display no shape selectivity, but HZSM-5 shows moderate selectivity to the target product, 4,4′-dimethylbiphenyl (4,4′-DMBP) under proper reaction conditions. Modification of the surface of HZSM-5 zeolite can improve the selectivity to 4,4′-DMBP, especially the simultaneous modification of external and internal surface with inorganic P compound. The selectivity to 4,4′-DMBP can be increased to as high as 65% over the HZSM-5 modified with a small amount of ammonium hydrogen phosphate.
AB - Methylation of 4-methylbiphenyl with methanol was carried out using zeolites HY, HM, and HZSM-5 as catalysts under fixed-bed down-flow conditions. HY and HM display no shape selectivity, but HZSM-5 shows moderate selectivity to the target product, 4,4′-dimethylbiphenyl (4,4′-DMBP) under proper reaction conditions. Modification of the surface of HZSM-5 zeolite can improve the selectivity to 4,4′-DMBP, especially the simultaneous modification of external and internal surface with inorganic P compound. The selectivity to 4,4′-DMBP can be increased to as high as 65% over the HZSM-5 modified with a small amount of ammonium hydrogen phosphate.
UR - http://www.scopus.com/inward/record.url?scp=0034163636&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=0034163636&partnerID=8YFLogxK
U2 - 10.1023/a:1019052802061
DO - 10.1023/a:1019052802061
M3 - Article
AN - SCOPUS:0034163636
SN - 1011-372X
VL - 65
SP - 147
EP - 151
JO - Catalysis Letters
JF - Catalysis Letters
IS - 1-3
ER -