Regeneration method for gravity-flowing deactivated catalyst particles

Claim 1

A method for continuously regenerating hydrocarbon conversion catalyst particles comprising a Group VIII metal and a halogen component in combination with a refractory inorganic oxide carrier material, and which have become deactivated through use in said hydrocarbon conversion reaction by (1) deposition of carbonaceous matter thereon and through (2) loss of halogen therefrom, said continuous regeneration being effected in a regeneration zone wherein said particles are downwardly movable through a descending column via gravity-flow in countercurrent relationship with the upward flow of vapors within said zone and wherein said regeneration zone comprises a carbon-burning/halogenation first section interconnected with and surmounted with respect to a lower drying second section, which regeneration method comprises the interrelated sequential steps of: (a) introducing (i) deactivated catalyst particles, (ii) a first air stream from an external source and, (iii) a halogen or a halogen-containing compound from an external source into said upper carbon-burning/halogenation first section; (b) maintaining said catalyst particles within said first section for a time sufficient to (i) remove substantially all of said carbonaceous matter therefrom and, (ii) increase the halogen content thereof; (c) introducing (i) said catalyst particles from said carbon-burning/halogenation first section, via of said gravity-flow, and, (ii) a second air stream from an external source into said lower drying section, and maintaining said catalyst particles within said lower drying section for a time sufficient to remove substantially all the water therefrom; and (d) withdrawing substantially water-free, regenerated particles from said regeneration zone.

Claim 2

A method for continuously regenerating hydrocarbon conversion catalyst particles comprising a Group VIII metal and a halogen component in combination with a refractory inorganic oxide carrier material, and which have become deactivated through use in said hydrocarbon conversion reaction by (1) deposition of carbonaceous matter thereon and through (2) loss of halogen therefrom, said continuous regeneration being effected in a regeneration zone wherein said particles are downwardly movable through a descending column via gravity-flow in countercurrent relationship with the upward flow of vapors within said zone and wherein said regeneration zone comprises a carbon-burning/halogenation first section interconnected with and surmounted with respect to a lower drying second section, which regeneration method comprises the interrelated sequential steps of: (a) introducing (i) deactivated catalyst particles, (ii) a first air stream from an external source and, (iii) a halogen or a halogen-containing compound from an external source into said upper carbon-burning/halogenation first section; (b) maintaining said catalyst particles within said first section for a time sufficient to (i) remove substantially all of said carbonaceous matter therefrom and, (ii) increase the halogen content thereof; (c) introducing (i) said catalyst particles from said carbon-burning/halogenation first section, via of said gravity-flow, and, (ii) a second air stream from an external source into said lower drying section, and maintaining said catalyst particles within said lower drying section for a time sufficient to remove substantially all the water therefrom; and (d) withdrawing substantially water-free, regenerated particles from said regeneration zone.