Patent ID: 6048814
Filing Date: 2000-04-11
Classification: B01J,C10G

Abstract:
A process for regenerating a moving bed of catalyst for reforming or for aromatic hydrocarbon production, the catalyst comprising a support, at least one noble metal and at least one halogen, the process comprising a combustion step of treating the catalyst in a moving bed in at least two successive combustion zones, an oxychlorination step and a calcining step, in whicheach combustion zone is separated from the adjacent combustion zones so as to allow catalyst to pass and to prevent the passage of gases;at least one oxygen-containing gas is introduced into each zone of the combustion step, and the gases produced are extracted from each zone;the severity of the operating conditions in each zone of the combustion step increases in the direction of flow of the catalyst by increasing at least one of (a) oxygen content and (b) temperature of said oxygen-containing gas;at least one chlorinating agent, at least one oxygen-containing gas, and water are introduced into the oxychlorination step, such that an H.sub.2 O/HCl molar ratio is 1 to 50, the oxychlorination step being carried out in the presence of an oxychlorination gas containing less than 21% of oxygen and at least 50 ppm by weight of chlorine, at a temperature of 350-600.degree. C.