Patent ID: 6380119
Filing Date: 2002-04-30
Classification: B01J,C07B,C07D,Y02P

Abstract:
A process for regenerating a zeolite catalyst, comprising:(I) heating a partially or completely deactivated catalyst to 250-600Â° C. in an atmosphere which contains less than 2% by volume of oxygen; (II) treating the catalyst at from 250 to 800Â° C. with a first gas stream which contains from 0.1 to 4% by volume of an oxygen-donating substance or of oxygen or of a mixture of two or more thereof, where the first gas stream contains a higher amount of oxygen as compared to the atmosphere in (I); and (III) treating the catalyst at from 250 to 800Â° C. with a second gas stream which contains from more than 4 to 100% by volume of an oxygen-donating substance or of oxygen or of a mixture of two or more thereof.