A start-up process for improved selectivity in toluene...

Details A start-up process for improved selectivity in toluene... A start-up process for improved selectivity in toluene...

C - Chemistry, Metallurgy

07

C

C07C 15/02 (2006.01) C07C 6/12 (2006.01)

Patent

CA 2079164

A start-up procedure for use in the disproportionation of co-fed hydrogen and toluene feedstock over a nickel mordenite catalyst containing between 1.0 - 1.5 weight per cent nickel and having a silica to alumina molar ratio of between 16.1 and 22.1. At reaction start-up, the hydrogen to toluene molar ratio is maintained at an unconventionally low level of between 0.5 and 1.7. With an initial temperature of 250°C and under pressure of 550 psig or greater, toluene disproportionation is effected resulting in desirably high selectivity to benzene product and simultaneously low selectivity to undesirable non-aromatic compound by-product.

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