Back to results
US 12,728,378 B2Granted
Dehydrogenation and pyrolysis product recovery with heat integration
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 integrate recovery of propylene from a pyrolysis reactor and a paraffin dehydrogenation reactor. The improved process for recovering light olefins utilizes heats of compression to heat reboil streams.
Claims16
A process for cooling streams comprising:
- compressing a refrigerant stream to provide a compressed refrigerant stream;
- heat exchanging said compressed refrigerant stream with a deethanizer reboil stream from a deethanizer column to cool the compressed refrigerant stream and provide a cooled compressed refrigerant stream and boil up said deethanized reboil stream and provide a boiling deethanizer reboil stream;
- compressing a propylene refrigerant in a first propylene compressor to provide a first compressed propylene refrigerant stream and boiling up a reboil C2 splitter bottom stream by heat exchange with said first compressed propylene refrigerant stream to provide a cooled first compressed propylene refrigerant stream and a reboiled C2 splitter reboiled stream;
- and
- compressing said cooled first compressed propylene refrigerant stream in a second propylene compressor to provide a second compressed propylene refrigerant stream and heating an ethylene product stream by heat exchange with said second compressed propylene refrigerant stream to provide a heated ethylene product stream and a cooled second compressed propylene refrigerant stream.
2 more elements
A process for cooling streams comprising:
- compressing a refrigerant stream to provide a first compressed refrigerant stream;
- heat exchanging said first compressed refrigerant stream with a bottoms deethanizer reboil stream from a deethanizer column to cool the first compressed refrigerant stream and provide a cooled first compressed refrigerant stream and boil up said deethanized reboil stream and provide a boiling deethanizer reboil stream;
- compressing said cooled first compressed refrigerant stream in a second compressor to provide a second compressed refrigerant stream and heat exchanging a deethanizer side stream from said deethanizer column with said second compressed refrigerant stream to cool the second compressed refrigerant stream and provide a cooled second compressed refrigerant stream and boil up said deethanizer side stream to provide a boiling deethanizer side stream;
- compressing a propylene refrigerant in a first propylene compressor to provide a first compressed propylene refrigerant stream and boiling up a reboil C2 splitter bottom stream by heat exchange with said first compressed propylene refrigerant stream to provide a cooled first compressed propylene refrigerant stream and a reboiled C2 splitter reboiled stream;
- and
- compressing said cooled first compressed propylene refrigerant stream in a second propylene compressor to provide a second compressed propylene refrigerant stream and heating an ethylene product stream by heat exchange with said second compressed propylene refrigerant stream to provide a heated ethylene product stream and a cooled second compressed propylene refrigerant stream.
3 more elements
An apparatus for cooling streams comprising:
- a deethanizer bottoms reboil exchanger in downstream communication with a first compressor;
- a second compressor in downstream communication with said first compressor;
- a side reboil exchanger in downstream communication with said second compressor;
- a dehydrogenation cold box in downstream communication with said first compressor, wherein said dehydrogenation cold box is configured to receive a compressed refrigerant stream from said first compressor and to cool a dehydrogenated hydrocarbon stream by heat exchange with said compressed refrigerant stream, and
- a pyrolysis cold box in downstream communication with said second compressor, wherein said pyrolysis cold box is configured to receive a second compressed refrigerant stream from said second compressor and to cool said second compressed refrigerant stream by heat exchange with a pyrolyzed hydrocarbon stream,
- wherein the first compressor, the deethanizer bottoms reboil exchanger, the second compressor, the side reboil exchanger, the dehydrogenation cold box, and the pyrolysis cold box together are arranged to circulate a single refrigerant stream through each of said units.
3 more elements
Dependencies are inferred from the claim text.