Refrigeration – Processes – Circulating external gas
Patent
1993-02-12
1994-05-31
Capossela, Ronald C.
Refrigeration
Processes
Circulating external gas
62 27, F25J 300
Patent
active
053158326
ABSTRACT:
The process for the recovery of light hydrocarbon fractions from off-gases derived from the transfer of petroleum material, particularly from a marine loading operation. One process comprises introducing the off-gases containing a light hydrocarbon fraction to be recovered into a refrigerated absorbent column through a liquid ring compressor, employing as a motive fluid a heavy hydrocarbon fraction, recovering a bottom stream from the absorber column having the heavy oil and the light hydrocarbon fraction, then venting an overhead air stream with a low total hydrocarbon content. The process also includes an integrated process for the recovery of light hydrocarbon fractions from off-gases and includes, in addition to a refrigerated absorber column, a recovery stripper column for the removal of the light hydrocarbon fraction from the bottom liquid of the absorber column and the recovery and recycling of a heavy hydrocarbon fraction for use in the absorber column and with the liquid ring compressor. The return of non-condensibles to the liquid ring compressor, both the absorber and the absorber recovery process systems provide for an efficient, low-cost and effective process for the recovery of light hydrocarbon fraction from marine off-gases.
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Capossela Ronald C.
Crowley Richard P.
Process System International, Inc.
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