Refrigeration – Processes – Circulating external gas
Patent
1993-09-27
1994-12-27
Capossela, Ronald C.
Refrigeration
Processes
Circulating external gas
62 37, 62 43, F25J 302
Patent
active
053754220
ABSTRACT:
A process for separating nitrogen and hydrocarbons from a mixture of gases by splitting the mixture into a plurality of separate streams and throttling the flow of each stream to achieve a selected variable flow rate therebetween. The plurality of separate streams are individually cooled by exchanging heat with a plurality of different process streams. The cooled streams are combined and expand into a separation column where nitrogen ascends the column and exits as a process stream while hydrocarbon descends the column to a reboiler thereof and exits as a process stream. The reboiler is used for cooling one of the separate streams. The hydrocarbon from the bottom of the column is expanded and used to cool a reflux condenser located inside the column and thereafter cools another of the streams before it is discharged from the process. The nitrogen process stream is used to cool another of the separated streams, and then is discharged from the process.
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Bates Marcus L.
Capossela Ronald C.
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