Abstract
Shape-selective methylation of 4-methylbiphenyl was studied using zeolites HY. HM and HZSM-5 under the 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). Increasing the crystal size and modifing the surface of HZSM-5 zeolite can improve the selectivity to 4,4'-DMBP. The modification of external and internal surface with inorganic P compound was found to be very effective. 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.
Original language | English (US) |
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Pages (from-to) | 3023-3028 |
Number of pages | 6 |
Journal | Studies in Surface Science and Catalysis |
Volume | 130 C |
DOIs | |
State | Published - 2000 |
All Science Journal Classification (ASJC) codes
- Catalysis
- Condensed Matter Physics
- Physical and Theoretical Chemistry
- Surfaces, Coatings and Films
- Materials Chemistry