Tuesday pm 25- Conversion of aromatics

25-0-01 - Shape-selective methylation of 4-methybiphenyl into 4,4 -dimethybiphenyl over modified ZSM-5 catalysts 

Clean Fuels and Catalysis Program, The Energy Institute, and Department of Energy Geo-Environmental Engineering, The Pennsylvania State University, USA, csong psu.edu 

A linear polycyclic compound, 4,4 -dimethylbiphenyl (4,4 -DMBP), is an intermediate for making monomer of some advanced polymer materials, but the selective synthesis of 4,4 -DMBP is difficult. In this work, modifications were made on a ZSM-5 zeolite for selective methylation of 4-methybiphenyl (4-MBP) to form 4,4 -DMBP. The use of binder, deposition of basic oxide such as calcium oxide over zeolite internal and external surface can effectively improve the product selectivity. An isomorphous substitution of ZSM-5 framework A1 with Fe by a post-synthetic treatment, coupled with modification of external and internal surface by P or Ca leads to high-performance catalyst with stable activity and superior selectivity for synthesis of 4,4 -DMBP by 4-MBP methylation. 

25-0-02 - Facile Friedel-Craft s alkylation of phenol with 4-hydroxybutan-2-one over p and Y zeolites to produce raspberry ketone 

Department of Chemistry, Anna University, Chennai, India - v murugu hotmail.com 

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