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US 11,136,279 B2Granted
Integrated process for producing olefins from alkanes by hydrogen transfer
AssigneeExxonMobil Research and Engineering Company
InventorsAaron Sattler, Michele Paccagnini, Kun Wang, Henry K. Klutse, Brian M. Weiss
Life of this patent
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Abstract
This application relates to transfer hydrogenation between light alkanes and olefins, and, more particularly, embodiments related to an integrated olefin production system and process which can produce higher carbon number olefins from corresponding alkanes. Examples methods may include reacting at least a portion of the ethylene and the at least one alkane via transfer hydrogenation to produce at least a mixed product stream comprising generated ethane from at least a portion of the ethylene, unreacted ethylene, and an olefin corresponding to the at least one alkane.
Claims13
A method comprising:
- introducing an ethane feed stream to an ethylene generation unit, the ethane feed stream comprising ethane;
- generating at least an ethylene effluent stream from the ethylene generation unit, the ethylene effluent stream comprising ethylene and an unreacted portion of the ethane;
- splitting at least a portion of the ethylene effluent stream into a first ethylene effluent stream and a second ethylene effluent stream;
- introducing at least the first ethylene effluent stream and an alkane stream comprising at least one alkane to a hydrogen transfer unit, wherein the hydrogen transfer unit comprises at least one bimetallic catalyst comprising platinum;
- reacting at least a portion of the ethylene from the first ethylene effluent stream and the at least one alkane via transfer hydrogenation in the hydrogen transfer unit to produce at least a mixed product stream comprising generated ethane from at least a portion of the ethylene, unreacted ethylene, and an olefin corresponding to the at least one alkane;
- introducing at least a portion of the mixed product stream to a product fractionation unit to separate the mixed product stream into at least an ethylene recycle stream comprising at least a portion of the generated ethane and at least a portion of the unreacted ethylene and a product stream comprising at least a portion of the olefin corresponding to the at least one alkane;
- recycling at least a portion of the ethylene recycle stream to the ethylene generation unit;
- introducing the second ethylene effluent stream into a C2 splitter unit;
- generating an ethylene bottoms stream comprising at least a portion of the ethane from the ethylene effluent stream and an ethylene product stream comprising at least a portion of the ethylene from the ethylene effluent stream;
- and
- recycling at least a portion of the ethylene bottoms stream to the ethylene generation unit.
8 more elements
A method comprising:
- introducing an ethane feed stream to an ethylene generation unit, the ethane feed stream comprising ethane;
- generating at least an ethylene effluent stream from the ethylene generation unit, the ethylene effluent stream comprising ethylene and an unreacted portion of the ethane;
- splitting at least a portion of the ethylene effluent stream into a first ethylene effluent stream and a second ethylene effluent stream;
- introducing the first ethylene effluent stream and a propane stream comprising propane into a hydrogen transfer unit, wherein the hydrogen transfer unit comprises at least one bimetallic catalyst comprising platinum;
- reacting at least a portion of the ethylene from the first ethylene effluent stream and the propane via transfer hydrogenation in the hydrogen transfer unit to generate ethane and propylene, wherein the transfer hydrogenation occurs at a temperature less than about 400° C. and a pressure greater than about 1380 kPa absolute;
- separating at least a portion of the generated ethane from the propylene;
- recycling at least a portion of the separated ethane to the ethylene generation unit;
- introducing the second ethylene effluent stream into a C2 splitter unit;
- generating an ethylene bottoms stream comprising at least a portion of the ethane from the ethylene effluent stream and an ethylene product stream comprising at least a portion of the ethylene from the ethylene effluent stream;
- and
- recycling at least a portion of the ethylene bottoms stream to the ethylene generation unit.
8 more elements
Dependencies are inferred from the claim text.