D. Mravec, J. Horniaková, M. Králik
2001
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0
Influential Citations
2
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Journal
Studies in Surface Science and Catalysis
Abstract
Publisher Summary This chapter discusses the alkylation of biphenyl with tert-butanol that has been carried out over different zeolites under liquid phase conditions. HM (17.5) and HY (15) zeolites have been found to be the most active, with a maximum biphenyl conversion near 60%. Dealuminated mordenite HM (17.5) leads to very high selectivities to 4-( tert -butyl)biphenyl (TBB) (99%) and 4,4’-di( tert -butyl)biphenyl (DTBB) (96%). Selectivity to linear 4-TBB and 4,4’-DTBB depends on the diffusional possibilities of relatively voluminous mono tert -butyl- and di-( tert -butyl)biphenyl isomers from the zeolite pores. The most suitable temperature has been found to be 160°C. An increase in temperature leads to a significant decrease of selectivities to the desired products as a result of secondary reactions.