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US 12,643,843 B2Granted
Dehydrogenation and pyrolysis product recovery with a common refrigerant
AssigneeUop LLC
InventorsErnest J. Boehm, Sudipta K. Ghosh, Prashant Balyan, Xin X. Zhu, Kyle Cuellar
Life of this patent
Estimating the term…
Abstract
A process and apparatus cool a pyrolyzed stream and a dehydrogenated stream in respective cold boxes by use of a refrigerant compressed with a common compressor. The refrigerant is compressed and used to cool a pyrolysis cold box and a dehydrogenation cold box.
Claims18
A process for cooling streams comprising:
- cooling a dehydrogenated stream in a dehydrogenation cold box to provide a cooled dehydrogenated stream;
- cooling a pyrolyzed stream in a pyrolysis cold box to provide a cooled pyrolyzed stream;
- providing a refrigerant stream to the dehydrogenation cold box and to the pyrolysis cold box;
- demethanizing said cooled pyrolyzed stream in a demethanizer column to provide a demethanizer side stream;
- compressing said demethanizer side stream to provide a compressed side stream;
- cooling said compressed side stream in said pyrolysis cold box to provide a cooled compressed side stream;
- and
- refluxing the cooled compressed side stream to said demethanizer column.
5 more elements
A process for separating methane from ethane comprising:
- cooling a hydrocarbon stream;
- separating said hydrocarbon stream into a gaseous hydrocarbon stream;
- expanding said gaseous hydrocarbon stream into an expanded gaseous hydrocarbon stream;
- demethanizing said expanded gaseous hydrocarbon stream in a demethanizer column to provide an overhead stream rich in methane and a bottom stream rich in ethane;
- compressing a demethanizer side stream to provide a compressed side stream;
- cooling said compressed side stream in a cold box to provide a cooled compressed side stream;
- and
- refluxing the cooled compressed side stream to said demethanizer column.
5 more elements
An apparatus for cooling stream comprising:
- a dehydrogenation reactor;
- a pyrolysis reactor;
- a dehydrogenation cold box in downstream communication with said dehydrogenation reactor;
- a pyrolysis cold box in downstream communication with said pyrolysis reactor;
- a refrigerant compressor;
- said pyrolysis cold box and said dehydrogenation cold box in downstream communication with said refrigerant compressor;
- a demethanizer column in downstream communication with said pyrolysis cold box;
- and
- a demethanizer column side stream outlet in fluid communication with a side compressor and the side compressor in fluid communication with said pyrolysis cold box.
6 more elements
Dependencies are inferred from the claim text.