Refrigeration – Processes – Circulating external gas
Patent
1990-01-04
1991-07-30
Capossela, Ronald C.
Refrigeration
Processes
Circulating external gas
62 28, 62 36, 62 44, F25J 302
Patent
active
050357328
ABSTRACT:
A cryogenic technique for recovering ethene from a gaseous mixture containing methane, ethane, etc. Operating methods and apparatus are provided for passing the gas feed through a chilling train having a series of dephlegmator-type exchange units to condense liquid rich in ethene and ethane, while separating a major portion of methane and lighter gas. A multizone demethanizer removes condensed methane from the C.sub.2 fraction to provide multiple methane free liquid streams of varying ethene to ethane ratio at least one of which is essentially C.sub.3 free.
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Capossela Ronald C.
Stone & Webster Engineering Corporation
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