Claims
- 1. A dual bed process for upgrading a refractory hydrocarbon feed, characterized by a Bromine No. greater than about 10 and an aromatics content of at least about 40 weight percent, which comprises contacting a stream of said feed initially in a hydrotreating zone containing a bed of hydrotreating catalyst under reaction conditions which include a pressure within the range of about 100 to about 1800 psig, a temperature between about 550.degree. F. and about 850.degree. F. in the presence of between about 2.4 and about 24 moles of hydrogen/mole of hydrocarbon charge to convert sulfur and nitrogen derivatives of hydrocarbon to hydrogen sulfide and ammonia; passing the entire effluent from said hydrotreating zone to a hydrocracking zone containing a bed of hydrocracking catalyst comprising a crystalline aluminosilicate zeolite characterized by a silica to alumina ratio of at least about 12 and a constraint index within the approximate range of 1 to 12 in combination with a metal component exhibiting hydrogenation/dehydrogenation activity under reaction conditions which include a pressure within the above stated range, a hydrogen concentration between about 2 and about 23 moles of hydrogen per mole of charge to said latter zone and a temperature between about 650.degree. F. and about 950.degree. F. and recovering gasoline of high octane number directly as a product of the aforenoted dual bed sequential operation.
- 2. The process of claim 1 wherein said hydrocarbon feed contains between about 40 and about 70 weight percent of aromatics and has a Bromine No. in the approximate range of 10 to 60.
- 3. The process of claim 1 wherein said hydrocarbon feed is a catalytic cracking cycle stock.
- 4. The process of claim 1 wherein said hydrocarbon feed is coker gas oil.
- 5. The process of claim 1 wherein said zeolite is ZSM-5.
- 6. The process of claim 1 wherein said metal component is a transition metal.
- 7. The process of claim 1 wherein said metal component is a metal of Group VIII.
- 8. The process of claim 1 wherein said metal component is palladium.
- 9. The process of claim 1 wherein said metal component is zinc.
- 10. The process of claim 1 wherein said metal component is a combination of palladium and zinc.
- 11. The process of claim 1 wherein said pressure is between about 500 and about 1500 psig.
CROSS REFERENCE TO RELATED APPLICATION
This application is a continuation-in-part of copending application Ser. No. 793,706 filed May 4, 1977 which issued as U.S. Pat. No. 4,153,540.
US Referenced Citations (10)
Continuation in Parts (1)
|
Number |
Date |
Country |
Parent |
793706 |
May 1977 |
|