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US 9,518,230 B2Granted
Process for recovering hydroprocessed hydrocarbons with two strippers
AssigneeUop LLC
InventorsRichard K. Hoehn, David M. Bowman, Xin X. Zhu
Life of this patent
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Abstract
A process is disclosed for recovering hydroprocessing effluent from a hydroprocessing unit utilizing a hot stripper and a cold stripper. Only the hot hydroprocessing effluent is heated in a fired heater prior to product fractionation, resulting in substantial operating and capital savings.
Claims14
A hydroprocessing process comprising:
- hydroprocessing a hydrocarbon feed in a hydroprocessing reactor to provide a hydroprocessing effluent stream;
- separating the hydroprocessing effluent stream into a relatively cold hydroprocessing effluent stream and a relatively hot hydroprocessing effluent stream, comprising separating said hydroprocessing effluent stream in a hot separator to provide a hot separator overhead stream comprising a portion of said cold hydroprocessing effluent stream and a hot separator bottoms stream and separating the hot separator bottoms stream in a hot flash drum to provide a hot flash overhead stream comprising a portion of said cold hydroprocessing effluent stream and a hot flash bottoms stream comprising the hot hydroprocessing effluent stream;
- stripping the relatively cold hydroprocessing effluent stream in a cold stripper to provide a cold stripped stream;
- stripping the relatively hot hydroprocessing effluent stream in a hot stripper to provide a hot stripped stream;
- and
- feeding the cold stripped stream and the hot stripped stream to a product fractionation column.
3 more elements
A hydroprocessing process comprising:
- hydroprocessing a hydrocarbon feed in a hydroprocessing reactor to provide a hydroprocessing effluent stream;
- separating the hydroprocessing effluent stream into a cold hydroprocessing effluent stream and a hot hydroprocessing effluent stream, comprising separating said hydroprocessing effluent stream in a hot separator to provide a hot separator overhead stream comprising a portion of said cold hydroprocessing effluent stream and a hot separator bottoms stream and separating the hot separator bottoms stream in a hot flash drum to provide a hot flash overhead stream comprising a portion of said cold hydroprocessing effluent stream and a hot flash bottoms stream comprising the hot hydroprocessing effluent stream;
- stripping the cold hydroprocessing effluent stream in a cold stripper to provide a cold stripped stream;
- stripping the hot hydroprocessing effluent stream in a hot stripper to provide a hot stripped stream;
- heating the hot stripped stream in a fired heater, and bypassing the cold stripped stream around the fired heater;
- and
- fractionating the cold stripped stream and the hot stripped stream in a product fractionation column to provide product streams.
4 more elements
A hydroprocessing process comprising:
- hydroprocessing a hydrocarbon feed in a hydroprocessing reactor to provide a hydroprocessing effluent stream;
- separating said hydroprocessing effluent stream in a hot separator to provide a hot separator bottoms stream and a hot separator overhead stream comprising a portion of a relatively cold hydroprocessing effluent stream and separating the hot separator bottoms stream in a hot flash drum to provide a hot flash overhead stream comprising a portion of said relatively cold hydroprocessing effluent stream and a hot flash bottoms stream comprising a relatively hot hydroprocessing effluent stream;
- stripping said relatively cold hydroprocessing effluent stream which is a portion of said hydroprocessing effluent stream in a cold stripper to provide a cold stripped stream;
- stripping said relatively hot hydroprocessing effluent stream which is a portion of said hydroprocessing effluent stream in a hot stripper to provide a hot stripped stream;
- and
- fractionating the cold stripped stream in a product fractionation column to provide product streams.
3 more elements
Dependencies are inferred from the claim text.