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US 12,698,247 B2Granted
Dehydrogenation and pyrolysis product recovery with a common C3 splitter
AssigneeUop LLC
InventorsSudipta K. Ghosh, Prashant Balyan, Xin X. Zhu, Kyle Cuellar, Fuyue Stephanie Li, Ernest J. Boehm
Life of this patent
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Abstract
A process and apparatus integrate recovery of propylene from a pyrolysis reactor and a paraffin dehydrogenation reactor. A common C3 splitter column fractionates propylene product from propane recycle to a paraffin dehydrogenation reactor. The C3 hydrocarbons may be provided from a pyrolysis reactor and from a dehydrogenation reactor.
Claims19
A process for separating propylene from propane comprising:
- fractionating a C3 pyrolyzed stream and a dehydrogenation stream into a propylene product stream and a propane recycle stream;
- dehydrogenating said propane recycle stream,
- wherein an overhead stream from a fractionation column is separated into an overhead vapor stream and an overhead liquid stream;
- and
- compressing the overhead vapor stream to provide a compressed vapor stream and reboiling a bottoms stream from said fractionation column by heat exchange with said compressed vapor stream.
2 more elements
A process for separating propylene from propane comprising:
- fractionating a dehydrogenation stream into a propylene stream and a propane recycle stream in a fractionation column;
- fractionating a C3 pyrolyzed stream into a propylene stream and a propane recycle stream;
- and
- dehydrogenating said propane recycle stream,
- taking a propane stream from a bottom of a fractionation column and reboiling a first portion of the propane stream by heat exchange with a first stream and reboiling a second portion of the propane stream by heat exchange with a second stream.
2 more elements
An apparatus for separating propylene from propane comprising:
- a fractionation column in downstream communication with dehydrogenation reactor through a dehydration line and a pyrolysis reactor through a C3 pyrolyzed line;
- said dehydrogenation reactor in downstream communication with said fractionation column,
- wherein an inlet for said C3 pyrolyzed line to the fractionation column is at an elevation above an inlet for said dehydrogenation line to the fractionation column.
Dependencies are inferred from the claim text.