Patent ID: 6187943
Filing Date: 2001-02-13
Classification: B01J,C07C,C07D

Abstract:
In a process for preparing a carbocyclic nitrile which comprises ammoxidating a starting cyclic compound which is a carbocyclic compound in a reaction zone of a fluidized bed reactor in the presence of a metal oxide catalyst containing vanadium and/or molybdenum in a fluidized bed, the improvement which comprises forining the fluidized bed by supplying an oxygen-containing gas through an oxygen-containing gas inlet provided at the bottom of the fluidized bed reactor, and by supplying the starting cyclic compound and ammonia at a level higher than the oxygen-containing gas inlet so that the ratio of the amount of catalyst (Wb) fluidized at a level higher than an inlet of the starting cyclic compound to the amount of catalyst (Wa) fluidized at a level higher than the oxygen-containing gas inlet in the reaction zone is in the range of Wb/Wa of 0.05 to 0.9 by weight, and conducting the ammoxidation reaction for more than 10 hours.