(1,1'-Biphenyl)-4-carboxaldehyde → 4-Methylbiphenyl

Participants

Reaction Steps

5 g/hr of the solution dissolved 10% by weight of 4-formylbiphenyl in a benzene was continuously fed in the hydrogenation reactor, while keep the hydrogen pressure under 10 atm and the reaction temperature at 130° C. Product water was removed from the reaction product solution by phase separation and then benzene was distilled off to obtain 4-methylbiphenyl. The conversion of 4-formylbiphenyl was 99.3% and the selectivity to 4-methylbiphenyl was 99.0% by mole. A small amount of 4-biphenylmethanol and high boiling point products was further contained in 4-methylbiphenyl. Product water was separated from the reaction product solution and then the 4-biphenylmethanol and high boiling point by-products were removed by distillation, whereby 4-methylbiphenyl with a purity of 98% by weight or above was obtained.

Provenance & Evidence