PRICAT catalysts for AMS selective hydrogenation

Phenol production is increased when α-methyl styrene (AMS) is selectively hydrogenated to cumene prior to recycling. Johnson Matthey provide PRICAT™ palladium on alumina catalysts either in tablets or trilobe extrudates.

The catalysts give high activity and low isopropyl cyclohexane formation, thus allowing operation at lower temperature, leading to a low rate of coke formation and polymerisation, and a low rate of pressure drop increase across the reactor.