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US 11,306,045 B2Granted
Refrigeration recovery from reactor feed in a propane dehydrogenation system
AssigneeKellogg Brown & Root LLC
InventorRian Reyneke
Life of this patent
Estimating the term…
Abstract
A method to recover refrigeration credit from propane feed to a propane dehydrogenation reactor by fully condensing a Depropanizer overhead stream, letting the condensed stream down in pressure, and vaporizing the stream at lower pressure against process streams to recover refrigeration credit.
Claims6
A process to provide refrigeration to a propane dehydrogenation process, the process comprising:
- partially or fully condensing a purified propane-rich depropanizer overhead stream against a relatively warm cooling medium at relatively high pressure;
- letting down the liquid purified-rich overhead stream in pressure;
- and
- partially or fully vaporizing the liquid purified-rich overhead stream against at least one process stream to provide refrigeration, where vaporization pressure is based on back-pressure from a propane dehydrogenation reactor, and where at least a portion of the partially or fully vaporized stream is used as feed to the propane dehydrogenation reactor.
1 more element
A process to provide refrigeration for recovering propylene from a propane dehydrogenation process, the process comprising:
- partially or fully condensing a purified propane-rich depropanizer overhead stream against a relatively warm cooling medium at relatively high pressure, where the relatively warm cooling medium is at a temperature between about 20° C. and about 50° C. and where the relatively high pressure is between about 10 and about 20 barg;
- letting down the liquid purified-rich overhead stream in pressure based on the back-pressure from a propane dehydrogenation reactor;
- and
- partially or fully vaporizing the liquid purified-rich overhead stream against at least one process stream to provide refrigeration, where vaporization pressure is based on back-pressure from the propane dehydrogenation reactor, and where at least a portion of the partially or fully vaporized stream is used as feed to the propane dehydrogenation reactor.
1 more element
Dependencies are inferred from the claim text.