Process and apparatus for producing and recycling cracked hydrocarbons
AssigneeUop LLC
InventorJibreel A. Qafisheh
Life of this patent
Estimating the term…
Abstract
A process and apparatus is for recycling LCO and/or HCO to an FCC unit to recover additional distillate. Spent catalyst recycle in the FCC unit may be used to improve distillate yield. A hydroprocessing zone may saturate cycle oil aromatics for cracking in an FCC unit. The recycle cracked stream may be recycled to a downstream hydroprocessing zone to avoid a first hydroprocessing zone for hydrotreating feed to the FCC unit. Additional recovery of cycle oil for recycle is obtained by heating slurry oil prior to vacuum separation.
Claims17
A process for catalytically cracking hydrocarbons comprising:
- feeding a hydrocarbon feed stream to an FCC reactor and contacting said hydrocarbon feed stream with catalyst to catalytically crack said hydrocarbon feed stream to provide a cracked stream;
- disengaging said catalyst from said cracked stream;
- fractionating said cracked stream into products including a slurry oil stream from a bottom of a main fractionation column;
- heating said slurry oil stream;
- separating said heated slurry oil stream into a cycle oil stream and a heavy stream under vacuum pressure.
A process for catalytically cracking hydrocarbons comprising:
- hydroprocessing a hydrocarbon feed stream in a hydroprocessing unit;
- feeding said hydrocarbon feed stream to an FCC reactor and contacting said hydrocarbon feed stream with catalyst to catalytically crack said hydrocarbon feed stream to provide a cracked stream;
- disengaging said catalyst from said cracked stream;
- fractionating said cracked stream into products including a slurry oil stream from a bottom of a main fractionation column;
- heating said slurry oil stream;
- separating said heated slurry oil stream into a cycle oil stream and a heavy stream under vacuum pressure;
- and
- recycling said cycle oil stream to said hydroprocessing unit;
- and
- recycling a portion of said cycle oil stream to said FCC reactor.
Dependencies are inferred from the claim text.