Patent ID: 8884075
Filing Date: 2014-11-11
Classification: B01J,C07C,Y02P

Abstract:
1. A process for the dehydrogenation of cyclohexanone to produce phenol, the process comprising: (a) contacting cyclohexanone in a reaction zone under dehydrogenation conditions with a dehydrogenation catalyst comprising (i) a support comprising silica; and (ii) a dehydrogenation component comprising at least one metal selected from Group 10 of the Periodic Table of Elements, wherein the dehydrogenation conditions include a temperature of about 250° C. to about 500° C., a pressure of about 100 to about 3550 kPa, a weight hourly space velocity of about 0.2 to 50 hr (b) terminating contact of the dehydrogenation catalyst with the cyclohexanone; then (c) supplying at least one interim gas to the reaction zone wherein the interim gas is selected from an inert gas or hydrogen gas and wherein the interim gas contacts the dehydrogenation catalyst at temperatures above about 300° C.; and then (d) recontacting the dehydrogenation catalyst with additional cyclohexanone.