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AssigneeAir Products and Chemicals, Inc.
InventorsLee Jarvis Howard, Howard Charles Rowles, Richard Alan Wright, Christopher Francis Harris, Glenn Eugene Kinard, Robert Newton Davis
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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.
A method for recovering methane from a feed gas mixture containing methane and one or more hydrocarbons heavier than methane which comprises:
A method for recovering methane from a feed gas mixture containing methane and one or more hydrocarbons heavier than methane which comprises:
Dependencies are inferred from the claim text.