| 摘要 |
A process for reactivating or regenerating catalysts which have become inactivated due to accumulation of carbon deposits or sulfur-containing carbon deposits on the catalyst surface during the course of use in catalytically refining various petroleum oils is described. Pursuant to the process, spent catalyst is passed into a regeneration zone comprised of a slowly rotating elongated generally cylindrical shell having its inlet at a level above its outlet end and having overlapping tangential louvers attached to the interior of the shell to support the catalyst, hot gas having an oxygen content in the range about 14 to 21 percent by volume is passed into the space between the louvers and the shell so that it passes between the louvers and through the catalyst supported on the louvers, catalyst is withdrawn from the space enclosed by the louvers at the outlet end of the shell at a rate adapted to maintain an average catalyst residence time of at least 1/2 hour in the regeneration zone, the hot gas is introduced at a rate such that from about 15 to 75 pounds per hour of hot gas are introduced for each pound of catalyst contained in the regeneration zone and the temperature of the hot gas introduced into the regeneration zone is adjusted so as to maintain a temperature in the range 600 DEG to 900 DEG F. in the gaseous effluent from the regeneration zone.
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