Refrigeration – Cryogenic treatment of gas or gas mixture – Separation of gas mixture
Patent
1998-03-03
1999-11-16
Capossela, Ronald
Refrigeration
Cryogenic treatment of gas or gas mixture
Separation of gas mixture
62627, F25J 100
Patent
active
059836652
ABSTRACT:
A high purity methane product is recovered from a feed gas mixture containing methane and one or more hydrocarbons heavier than methane by cooling, condensing, and rectifying the feed in a dephlegmator. The high purity methane product, containing at least 98 mole % methane, can be liquefied and stored for use as a fuel for internal combustion engines. A hydrocarbon product containing components heavier than methane is also recovered.
Methane recovery and C.sub.2.sup.+ hydrocarbon product purity can be improved by the use of a combined stripping heat exchanger and feed gas cooler. External refrigeration is utilized and can be supplemented in part by autorefrigeration provided by vaporizing dephlegmator liquid.
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Davis Robert Newton
Harris Christopher Francis
Howard Lee Jarvis
Kinard Glenn Eugene
Rowles Howard Charles
Air Products and Chemicals Inc.
Capossela Ronald
Fernbacher John M.
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