Process for fluid catalytic cracking

Abstract

One exemplary embodiment can be a process for fluid catalytic cracking The process can include providing a mixture of a fuel gas and at least one of steam and nitrogen to a catalyst stripping zone of a reaction zone. Usually, the fuel gas is added in an amount effective to add heat duty to a regeneration zone for a catalyst of the reaction zone.

1 . A process for fluid catalytic cracking, comprising:
 providing a mixture of a fuel gas and at least one of steam and nitrogen to a catalyst stripping zone of a reaction zone wherein the fuel gas is added in an amount effective to add heat duty to a regeneration zone for a catalyst of the reaction zone.   
     
     
         2 . The process according to  claim 1 , wherein the mixture comprises the fuel gas and steam. 
     
     
         3 . The process according to  claim 2 , wherein the weight ratio of the fuel gas and steam in the mixture is about 1:100-about 100:1. 
     
     
         4 . The process according to  claim 2 , wherein the weight ratio of the fuel gas and steam in the mixture is about 1:2-about 2:1. 
     
     
         5 . The process according to  claim 1 , wherein the fuel gas comprises at least one of hydrogen, nitrogen, carbon monoxide, methane, ethane, ethene, propane, propene, butane, and butene. 
     
     
         6 . The process according to  claim 1 , wherein the fuel gas comprises at least one of hydrogen, methane, ethane, and ethene. 
     
     
         7 . The process according to  claim 1 , wherein the catalyst stripping zone comprises one or more baffles. 
     
     
         8 . The process according to  claim 1 , further comprising providing the catalyst to the catalyst stripping zone, wherein the catalyst comprises an MFI zeolite. 
     
     
         9 . The process according to  claim 8 , wherein the regeneration zone further comprises a regeneration vessel receiving a spent catalyst communicated by a conduit. 
     
     
         10 . The process according to  claim 9 , further comprising providing a fuel gas stream to the conduit communicating the spent catalyst to the regeneration vessel. 
     
     
         11 . The process according to  claim 1 , further comprising providing a feed comprising at least one of a gas oil, a vacuum gas oil, an atmospheric gas oil, a coker gas oil, a hydrotreated gas oil, a hydrocracker unconverted oil, and an atmospheric residue to a riser of the reaction zone. 
     
     
         12 . The process according to  claim 1 , further comprising providing a plurality of catalysts, in turn comprising an MFI zeolite and a Y-zeolite. 
     
     
         13 . A process for fluid catalytic cracking, comprising:
 providing an effective amount of a mixture of a fuel gas stream and at least one of steam and nitrogen to a spent catalyst conduit communicating spent catalyst from a reaction zone to a regeneration zone.   
     
     
         14 . The process according to  claim 13 , wherein the mixture is provided to the catalyst stripping zone, and the mixture passes to the spent catalyst conduit. 
     
     
         15 . The process according to  claim 13 , wherein the mixture is provided directly to the spent catalyst conduit. 
     
     
         16 . The process according to  claim 13 , wherein the fuel gas stream comprises at least one of nitrogen, steam, and one or more C2-C4 hydrocarbons. 
     
     
         17 . The process according to  claim 13 , wherein the catalyst comprises an MFI zeolite. 
     
     
         18 . A process for fluid catalytic cracking, comprising:
 A) mixing a fuel gas and steam wherein the fuel gas is added in an amount effective to add heat duty to a regeneration zone for a catalyst of a reaction zone;   B) providing the mixture to a catalyst stripping zone of the reaction zone; and   C) passing the catalyst and mixture to the regeneration zone.   
     
     
         19 . The process according to  claim 18 , wherein a weight ratio of the fuel gas and steam in the mixture is about 1:100-about 100:1. 
     
     
         20 . The process according to  claim 18 , wherein a weight ratio of the fuel gas and steam in the mixture is about 1:2-about 2:1.