Catalyst regeneration procedure

Claim 2

during the operation of said process, introducing into said reaction zone with said naphtha feed stock and hydrogen an oxygen-free chlorine-containing reagent in amounts sufficient to increase catalyst chlorine content to 1.0 to about 4.0 wt. %, based on anhydrous catalyst, and thereafter discontinuing the contacting of said catalyst with said naphtha feed stock;

Claim 3

contacting said catalyst, after contact with said hydrocarbon feed stock with an oxygen-free chlorine-containing reagent in a gaseous medium from the group consisting of hydrocarbon feed, hydrogen containing gas, inert gas and mixtures thereof in an amount sufficient to increase the catalyst chlorine content to 1.0 weight percent to about 4.0 wt. %, based on anhydrous catalyst;

Claim 4

contacting said catalyst, after contact with said hydrocarbon feed stock with an oxygen-free chlorine-containing reagent in a gaseous medium from the group consisting of hydrocarbon feed, hydrogen containing gas, inert gas and mixtures thereof in an amount sufficient to increase the catalyst chlorine content to 1.0 weight percent to about 4.0 wt. %, based on anhydrous catalyst;

Claim 5

In a process for the catalytic conversion of hydrocarbons wherein a hydrocarbon feed stock is contacted with a catalyst comprising from about 0.01 to about 3.0 wt. % of an iridium component and a chlorine component contained on a refractory inorganic oxide support at conversion conditons, the catalyst having been at least partially deactivated during contact with said feed stock by the deposition of carbonaceous residues, a method for regenerating said catalyst comprising:

Claim 6

In a process for the catalytic conversion of hydrocarbons wherein a hydrocarbon feed stock is contacted with a catalyst comprising from about 0.01 to about 3.0 wt. % of an iridium component and a chlorine component contained on a refractory inorganic oxide support at conversion conditons, the catalyst having been at least partially deactivated during contact with said feed stock by the deposition of carbonaceous residues, a method for regenerating said catalyst comprising:

Claim 7

The process of claim 1 wherein said step (2) gaseous mixtures contain from 50 to 1000 ppm by volume of equivalent HCl.

Claim 8

contacting said treated catalyst with a substantially sulfur-free gaseous mixture containing oxygen, a chlorine-containing reagent and water at a temperature of less than about 850*F. for a time sufficient to burn at least a substantial portion of said carbonaceous residues from said catalyst, said gaseous mixture containing 0.1 to 1.0 mole percent oxygen and a concentration of chlorine-containing reagent equivalent in chlorine content to 20 to 2000 ppm by volume of HCl, the molar ratio of water to said equivalent HCl in said gaseous mixture being greater than about 10:1 to about 40:1.

Claim 9

contacting said treated catalyst with a substantially sulfur-free gaseous mixture containing oxygen, a chlorine-containing reagent and water at a temperature of less than about 850*F. for a time sufficient to burn at least a substantial portion of said carbonaceous residues from said catalyst, said gaseous mixture containing 0.1 to 1.0 mole percent oxygen and a concentration of chlorine-containing reagent equivalent in chlorine content to 20 to 2000 ppm by volume of HCl, the molar ratio of water to said equivalent HCl in said gaseous mixture being greater than about 10:1 to about 40:1.

Claim 10

contacting said catalyst with an inert gas to purge hydrogen and naphtha feed stock from contact with said catalyst; and

Claim 11

contacting said catalyst with an inert gas to purge hydrogen and naphtha feed stock from contact with said catalyst; and

Claim 12

contacting said treated catalyst with a substantially sulfur-free gaseous mixture containing oxygen, a chlorine-containing reagent and water at a temperature of less than about 850*F. for a time sufficient to burn at least a substantial portion of said carbonaceous residues from said catalyst, said gaseous mixture containing 0.1 to 1.0 mole percent oxygen and a concentration of chlorine-containing reagent equivalent in chlorine content to 50 to 1000 ppm by volume of HCl, the molar ratio of water to said equivalent HCl in said gaseous mixture being greater than about 10:1 to about 40:1.

Claim 13

contacting said treated catalyst with a substantially sulfur-free gaseous mixture containing oxygen, a chlorine-containing reagent and water at a temperature of less than about 850*F. for a time sufficient to burn at least a substantial portion of said carbonaceous residues from said catalyst, said gaseous mixture containing 0.1 to 1.0 mole percent oxygen and a concentration of chlorine-containing reagent equivalent in chlorine content to 50 to 1000 ppm by volume of HCl, the molar ratio of water to said equivalent HCl in said gaseous mixture being greater than about 10:1 to about 40:1.

Claim 14

The process of claim 1 wherein said catalyst additionally contains a platinum component.

Claim 15

The process of claim 1 wherein, said step (1) contacting of said catalyst with said chlorine-containing reagent is continued for a time sufficient to increase catalyst chlorine content to from 1.0 to 2.0 wt. %, based on anhydrous catalyst.

Claim 16

IN A PROCESS FOR CATALYTIC CONVERSATION OF A NAPTHA FEED STOCK WHEREIN A NAPHTHA FEED STOCK AND HYDROGEN ARE CONTACTED WITH A CATALYST COMPRISING FROM ABOUT 0.01 TO ABOUT 3.0 WT. % OF AN IRIDIUM COMPONENT AND A CHLORINE COMPONENT CONTAINED ON A REFRACTORY INORGANIC OXIDE SUPPORT AT REFORMING CONDITIONS, THE CATALYST HAVING BEEN AT LEAST PARTIALLY DEACTIVATED DURING CONTACT WITH SAID NAPHTHA FEED STOCK BY THE DEPOSITION OF CARBONACEOUS RESIDUES, A METHOD FOR REGENERATING SAID CATALYST COMPRISING (1) CONTACTING SAID CATALYST, AFTER CONTACT WITH SAID NAPHTHA FEED STOCK ITH AN OXYGEN-FREE CHLORINE-CONTAINING REAGET IN A GASEOUS MEDIUM FROM THE GROUP CONSISTING OF HYDROCARBON FEED, HYDROGEN CONTAINING GAS, INERT GAS AND MIXTURES THEREOF IN AMOUNTS SUFFICIENT TO INCREASE CATALYST CHLORINE CONTENT TO ABOUT 1.0 TO ABOUT 4.0 WT, % BASED ON ANHYDROUS CATALYST, AND (2) CONTACTING SAID TREATED CATALYST WITH A SUBSTANTIALLY SULFUR-FREE GASEOUS MIXTURE CONTAINING OXYGEN, A CHLORINE-CONTAINING REAGENT, AND WATER AT TEMPERATURE OF LESS THAN ABOUT 850*F, FOR A TIME SUFFICIENT TO BURN AT LEAST A SUBSTANTIAL PORTION OF SAID CARBONA CEOUS RESIDUES FROM SAID CATALYST, SAID GASEOUS MIXTURE CONTAINING 0.1 TO 1.0 MOLE PERCENT OXYGEN AND A CONCENTRATION OF CHLORINE-CONTAINING REAGENT EQUIVALENT TO CHLORINE CONTENT TO 20 TO 2000 PPM BY VOLUME OF HCL, THE MOLAR RATIO OF WATER TO SAID EQUIVALENT HCL IN SAID GASEOUS MIXTURE BEING GREATER THAN ABOUT 10.1 TO ABOUT 40.1,

Claim 17

IN A PROCESS FOR CATALYTIC CONVERSATION OF A NAPTHA FEED STOCK WHEREIN A NAPHTHA FEED STOCK AND HYDROGEN ARE CONTACTED WITH A CATALYST COMPRISING FROM ABOUT 0.01 TO ABOUT 3.0 WT. % OF AN IRIDIUM COMPONENT AND A CHLORINE COMPONENT CONTAINED ON A REFRACTORY INORGANIC OXIDE SUPPORT AT REFORMING CONDITIONS, THE CATALYST HAVING BEEN AT LEAST PARTIALLY DEACTIVATED DURING CONTACT WITH SAID NAPHTHA FEED STOCK BY THE DEPOSITION OF CARBONACEOUS RESIDUES, A METHOD FOR REGENERATING SAID CATALYST COMPRISING (1) CONTACTING SAID CATALYST, AFTER CONTACT WITH SAID NAPHTHA FEED STOCK ITH AN OXYGEN-FREE CHLORINE-CONTAINING REAGET IN A GASEOUS MEDIUM FROM THE GROUP CONSISTING OF HYDROCARBON FEED, HYDROGEN CONTAINING GAS, INERT GAS AND MIXTURES THEREOF IN AMOUNTS SUFFICIENT TO INCREASE CATALYST CHLORINE CONTENT TO ABOUT 1.0 TO ABOUT 4.0 WT, % BASED ON ANHYDROUS CATALYST, AND (2) CONTACTING SAID TREATED CATALYST WITH A SUBSTANTIALLY SULFUR-FREE GASEOUS MIXTURE CONTAINING OXYGEN, A CHLORINE-CONTAINING REAGENT, AND WATER AT TEMPERATURE OF LESS THAN ABOUT 850*F, FOR A TIME SUFFICIENT TO BURN AT LEAST A SUBSTANTIAL PORTION OF SAID CARBONA CEOUS RESIDUES FROM SAID CATALYST, SAID GASEOUS MIXTURE CONTAINING 0.1 TO 1.0 MOLE PERCENT OXYGEN AND A CONCENTRATION OF CHLORINE-CONTAINING REAGENT EQUIVALENT TO CHLORINE CONTENT TO 20 TO 2000 PPM BY VOLUME OF HCL, THE MOLAR RATIO OF WATER TO SAID EQUIVALENT HCL IN SAID GASEOUS MIXTURE BEING GREATER THAN ABOUT 10.1 TO ABOUT 40.1,

Claim 18

The process of claim 5 wherein said step (2) gaseous mixture contains from 50 to 1000 ppm by volume of equivalent HCl.

Claim 19

THE PROCESS OF CLAIM 5 WHEREIN SAID CATALYST ADDITIONALLY CONTAINS A PLATINUM COMPONENT.

Claim 20

The process of claim 5 wherein said step (1) contacting is continued for a time sufficient to increase catalyst chlorine content to between about 1.0 to 2.0 wt. %, based on anhydrous catalyst.

Claim 21

The process of claim 5 wherein the molar ratio of oxygen to equivalent HCl in said step (2) gaseous mixture is greater than about 5:1.

Claim 22

In a process for the catalytic reforming of naphtha feed stocks wherein said naphtha feed stock and hydrogen are contacted in a reaction zone with a catalyst comprising from about 0.01 to about 3.0 wt. % of an iridium component and a chlorine component contained on a refractory support at naphtha reforming conditions, the catalyst having been at least partially deactivated during contact with said naphtha feed stock and hydrogen by the deposition of carbonaceous residues thereon, a method for regenerating said catalyst comprising:

Claim 23

In a process for the catalytic reforming of naphtha feed stocks wherein said naphtha feed stock and hydrogen are contacted in a reaction zone with a catalyst comprising from about 0.01 to about 3.0 wt. % of an iridium component and a chlorine component contained on a refractory support at naphtha reforming conditions, the catalyst having been at least partially deactivated during contact with said naphtha feed stock and hydrogen by the deposition of carbonaceous residues thereon, a method for regenerating said catalyst comprising:

Claim 24

The process of claim 10 wherein said step (3) gaseous mixture contains from about 100 to 500 ppm by volume of equivalent HCl.

Claim 25

The process of claim 10 wherein the molar ratio of oxygen to equivalent HCl in said step (3) gaseous mixture is greater than about 5:1.

Claim 26

The process of claim 10 wherein said catalyst additionally contains from about 0.1 to about 3.0 wt.% of platinum.

Claim 27

The process of claim 10 wherein the amount of iridium present on the catalyst is at least about 0.1 wt. %.

Claim 28

The process of claim 10 wherein said step (1) contacting is continued for a time sufficient to increase catalyst chlorine content to between about 1.0 to 2.0 wt. %, based on anhydrous catalyst.