| 摘要 |
The present invention relates to a method for preparing a zeolite composition comprising a crystalline zeolite having deposited thereon a coating of silica which extensively covers and resides substantially exclusively on the external surface thereof, and to the composition so prepared. The present invention also relates to a process for the selective conversion of aromatic hydrocarbon feedstocks to a product rich in para-dialkyl substituted benzenes over a catalyst composition comprising such a silica-modified zeolite composition. |
