US2008135448A1PendingUtilityA1

Distillate-to-gasoline catalyst system and process therefor

41
Individually held — no corporate assignee on recordPriority: Nov 17, 2006Filed: Nov 17, 2006Published: Jun 12, 2008
Est. expiryNov 17, 2026(~0.3 yrs left)· nominal 20-yr term from priority
Inventors:Tushar V. ChoudharyPaul F. MeierEdward L. Sughrue, IiWalter Alvarez
C10G 45/54B01J 23/468C10G 45/52C10G 2400/02B01J 23/892C10G 45/62B01J 29/126B01J 35/19
41
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Claims

Abstract

A process is disclosed for converting distillate to gasoline-range hydrocarbons using a two-stage catalyst system including a first catalyst containing platinum, palladium, or platinum and palladium, and an acidic support, and a second catalyst containing iridium and an inorganic oxide support, and optionally nickel.

Claims

exact text as granted — not AI-modified
1 . A distillate-to-gasoline catalyst system comprising:
 a) a first catalyst comprising a metal component selected from the group consisting of platinum, palladium, and combinations thereof, and an acidic support; and   b) a second catalyst comprising iridium and an inorganic oxide support.   
     
     
         2 . The distillate-to-gasoline catalyst system of  claim 1  wherein said acidic support is a Y zeolite, and wherein said second catalyst further comprises nickel. 
     
     
         3 . The distillate-to-gasoline catalyst system of  claim 2  wherein said Y zeolite is hydrogen exchanged. 
     
     
         4 . The distillate-to-gasoline catalyst system of  claim 1  wherein said first catalyst contains from about 0.5 to about 5 weight percent metal component. 
     
     
         5 . The distillate-to-gasoline catalyst system of  claim 1  wherein said second catalyst contains from about 0.5 to about 5 weight percent iridium. 
     
     
         6 . The distillate-to-gasoline catalyst system of  claim 1  wherein said first catalyst contains from about 0.5 to about 3 weight percent metal component. 
     
     
         7 . The distillate-to-gasoline catalyst system of  claim 1  wherein said second catalyst contains from about 0.5 to about 3 weight percent iridium. 
     
     
         8 . The distillate-to-gasoline catalyst system of  claim 2  wherein said second catalyst contains from about 0.5 to about 5 weight percent iridium and from about 0.5 to about 5 weight percent nickel. 
     
     
         9 . The distillate-to-gasoline catalyst system of  claim 1  wherein said inorganic oxide support is selected from the group consisting of silica, alumina and combinations thereof. 
     
     
         10 . The distillate-to-gasoline catalyst system of  claim 1  wherein said inorganic oxide support is silica. 
     
     
         11 . The distillate-to-gasoline catalyst system of  claim 1  wherein said inorganic oxide support is alumina. 
     
     
         12 . A process for converting distillate to gasoline-range hydrocarbons comprising:
 a) contacting a distillate feedstream, in a first reaction zone, with a first catalyst comprising a metal component selected from the group consisting of platinum, palladium, and combinations thereof, and an acidic support in the presence of hydrogen to produce an intermediate product; and   b) contacting said intermediate product, in a second reaction zone, with a second catalyst comprising iridium and an inorganic oxide support to produce a gasoline-range product.   
     
     
         13 . The process of  claim 12  wherein said first reaction zone includes a temperature in the range of from about 200° C. to about 300° C., a pressure in the range of from about 100 psig to about 500 psig, and a WHSV for said distillate feedstream of about 0.1 to about 100 hr. −1 . 
     
     
         14 . The process of  claim 12  wherein said first reaction zone includes a temperature in the range of from about 220° C. to about 260° C., a pressure in the range of from about 200 psig to about 300 psig, and a WHSV for said distillate feedstream of about 0.1 to about 10 hr. −1 . 
     
     
         15 . The process of  claim 12  wherein said second reaction zone includes a temperature in the range of from about 260° C. to about 350° C., a pressure in the range of from about 100 psig to about 500 psig, and a WHSV of from about 0.1 to about 100 hr. −1 . 
     
     
         16 . The process of  claim 12  wherein said second reaction zone includes a temperature in the range of from about 280° C. to about 330° C., a pressure in the range of from about 200 psig to about 300 psig, and a WHSV of from about 0.1 to about 10 hr. −1 . 
     
     
         17 . The process of  claim 12  wherein said acidic support is a Y zeolite and wherein said second catalyst further comprises nickel. 
     
     
         18 . The process of  claim 17  wherein said Y zeolite is hydrogen exchanged. 
     
     
         19 . The process of  claim 12  wherein said first catalyst contains from about 0.5 to about 5 weight percent metal component. 
     
     
         20 . The process of  claim 12  wherein said second catalyst contains from about 0.5 to about 5 weight percent iridium. 
     
     
         21 . The process of  claim 12  wherein said first catalyst contains from about 0.5 to about 3 weight percent metal component. 
     
     
         22 . The process of  claim 17  wherein said second catalyst contains from about 0.5 to about 5 weight percent iridium and from about 0.5 to about 5 weight percent nickel. 
     
     
         23 . The process of  claim 12  wherein said second catalyst contains from about 0.5 to about 3 weight percent iridium. 
     
     
         24 . The process of  claim 12  wherein said inorganic oxide support is selected from the group consisting of silica, alumina and combinations thereof. 
     
     
         25 . The process of  claim 12  wherein said inorganic oxide support is silica. 
     
     
         26 . The process of  claim 12  wherein said inorganic oxide support is alumina. 
     
     
         27 . The process of  claim 12  wherein said distillate feedstream has an RON in the range of from about 25 to about 50, said distillate feedstream comprises: 1) hydrocarbons having in the range of 8 to 24 carbon atoms per molecule, 2) at least about 20 wt. % 1-ring napthenes, 3) at least about 20 wt. % 2-ring napthenes, and 4) at least about 10 wt. % aromatics; and wherein at least about 25 wt. % of said distillate feedstream boils at a temperature greater than or equal to about 221° C. 
     
     
         28 . The process of  claim 12  wherein said intermediate product comprises less than or equal to about 5 wt. % aromatics; less than or equal to about 15 wt. % 2-ring naphthenes; and wherein less than about 2 wt. % of said intermediate product boils at a temperature greater than or equal to about 221° C. 
     
     
         29 . The process of  claim 12  wherein said gasoline-range product has an RON of at least about 65; comprises at least about 40 wt. % paraffins; comprises less than or equal to about 5 wt. % aromatics; and wherein less than about 2 wt. % of said gasoline-range product boils at a temperature greater than or equal to about 221° C.

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