Patent ID: 8859835

Claim:
A process for the regeneration of a coked metal-containing catalyst, the process comprising the steps of: (i) contacting the coked metal-containing catalyst in a regeneration zone with an atmosphere consisting of carbon dioxide, carbon monoxide, and less than 100 ppm of molecular oxygen, wherein the carbon monoxide and the carbon dioxide have a ratio of partial pressures in the regeneration zone where the ratio of the partial pressure of the carbon monoxide to the partial pressure of the carbon dioxide in the regeneration zone is at least 2.3:1, and wherein the partial pressure of carbon dioxide in the regeneration zone is between about 0.1 and about 40 psia, at a temperature of at least 400° C.; and (ii) contacting the coked metal-containing catalyst in a regeneration zone with an atmosphere which contains hydrogen at a temperature of at least 400° C. consecutively with said contacting with said atmosphere consisting of carbon dioxide, carbon monoxide, and less than 100 ppm of molecular oxygen, so as to remove at least part of the carbonaceous material on the coked metal-containing catalyst and regenerate said catalyst.