Inventors:
Lee Jarvis Howard - Pikeville PA
Howard Charles Rowles - Center Valley PA
Richard Alan Wright - Macungie PA
Christopher Francis Harris - Old Zionsville PA
Glenn Eugene Kinard - Allentown PA
Robert Newton Davis - Breinigsville PA
Assignee:
Air Products and Chemicals, Inc. - Allentown PA
International Classification:
F25J 100
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.