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US 8,999,141 B2Granted
Three-phase hydroprocessing without a recycle gas compressor
AssigneeUop LLC
InventorsPeter Kokayeff, John Anthony Petri
Life of this patent
Estimating the term…
Abstract
In general, methods of hydroprocessing a hydrocarbonaceous feed stock are provided that do not use a costly recycle gas compressor, but are still able to use the more efficient reaction systems provided in a substantially three-phase hydroprocessing zone. The method combines a substantially liquid-phase hydroprocessing zone with the substantially three-phase hydroprocessing zone in a manner so that the hydrogen requirements for both reaction zones can be provided from an external source thereto without the use of a hydrogen recycle or recycle gas compressor to the substantially three-phase reaction zone.
Claims17
A method of processing a hydrocarbonaceous feed stock comprising:
- directing a feed stream to a substantially continuous liquid-phase hydroprocessing zone to form a first effluent, the substantially continuous liquid-phase hydroprocessing zone having a first hydrogen requirement;
- directing at least a portion of the first effluent to a substantially three-phase hydroprocessing zone to form a second effluent, the substantially three-phase hydroprocessing zone having a second hydrogen requirement effective to maintain the substantially three-phase hydroprocessing zone in a substantially continuous gas phase throughout and to provide an excess amount of hydrogen in the second effluent;
- supplying a hydrogen stream from an external make-up hydrogen system to provide the second hydrogen requirement;
- and
- separating the excess hydrogen present in the second effluent from the substantially three-phase hydroprocessing zone as a flow of hydrogen, and directing the hydrogen flow to the substantially continuous liquid-phase hydroprocessing zone to provide a hydrogen supply for the first hydrogen requirement.
2 more elements
A method of processing a hydrocarbonaceous feed stock comprising:
- providing an initial feed stream of at least a hydrocarbonaceous feed stock, a previously hydroprocessed liquid-phase hydrocarbonaceous stream, and a hydrogen-rich vapor stream;
- directing the initial feed stream to a substantially continuous liquid-phase hydroprocessing zone to form a first effluent, the substantially continuous liquid-phase hydroprocessing zone having a first requirement of hydrogen satisfied by dissolved hydrogen in the previously hydroprocessed liquid-phase hydrocarbonaceous stream and the hydrogen-rich vapor stream;
- separating the first effluent into a liquid effluent stream and a vapor effluent stream;
- recycling a portion of the first liquid effluent stream to the initial feed stream to provide the previously hydroprocessed liquid-phase hydrocarbonaceous stream;
- directing a portion of the first liquid effluent stream to a substantially three-phase hydroprocessing zone to form a second effluent, the substantially three-phase hydroprocessing zone having a second requirement of hydrogen effective to maintain a substantially continuous gas phase throughout the substantially three-phase hydroprocessing zone;
- providing a supply of hydrogen into the substantially three-phase hydroprocessing zone sufficient to satisfy the second hydrogen requirement and to provide excess hydrogen in the second effluent;
- separating the second effluent into the hydrogen-rich vapor stream and a hydrocarbonaceous product stream;
- and
- directing the hydrogen-rich vapor stream separated from the second effluent to the initial feed stream to the substantially continuous-liquid phase hydroprocessing zone;
- wherein an external make-up hydrogen system provides the second hydrogen requirement without a recycle compressor.
7 more elements
A method of processing a hydrocarbonaceous feed stock comprising:
- providing an initial feed stream of at least a hydrocarbonaceous feed stock, a previously hydroprocessed liquid-phase hydrocarbonaceous stream, and a hydrogen-rich vapor stream;
- directing the initial feed stream to a substantially continuous liquid-phase hydroprocessing zone to form a first effluent, the substantially continuous liquid-phase hydroprocessing zone having a first requirement of hydrogen satisfied by dissolved hydrogen in the previously hydroprocessed liquid-phase hydrocarbonaceous stream and the hydrogen-rich vapor stream;
- separating the first effluent into a liquid effluent stream and a vapor effluent stream in a separation zone;
- recycling a portion of the first liquid effluent stream from the separation zone to the initial feed stream to provide the previously hydroprocessed liquid-phase hydrocarbonaceous stream;
- directing a portion of the first liquid effluent stream to a substantially three-phase hydroprocessing zone to form a second effluent, the substantially three-phase hydroprocessing zone having a second requirement of hydrogen effective to maintain a substantially continuous gas phase throughout the substantially three-phase hydroprocessing zone;
- providing a supply of hydrogen into the substantially three-phase hydroprocessing zone sufficient to satisfy the second hydrogen requirement and to provide excess hydrogen in the second effluent;
- separating the second effluent into the hydrogen-rich vapor stream and a hydrocarbonaceous product stream in a second separation zone;
- and
- directing the hydrogen-rich vapor stream separated from the second effluent to the initial feed stream to the substantially continuous-liquid phase hydroprocessing zone;
- wherein an external make-up hydrogen system provides the second hydrogen requirement without a recycle compressor.
7 more elements
Dependencies are inferred from the claim text.