Refrigeration – Processes – Circulating external gas
Patent
1986-07-08
1987-09-22
Makay, Albert J.
Refrigeration
Processes
Circulating external gas
62 34, 62 39, 62 40, F25J 302
Patent
active
046953035
ABSTRACT:
A method for extracting natural gas liquids from a gas stream that has a high content of hydrogen and carbon dioxide is shown. This gas stream is scrubbed, dehydrated, filtered compressed and chilled prior to entering a demethanizer where the overhead residue gas consisting of hydrogen, nitrogen and methane are separated from the demethanizer bottoms product. Ths bottoms product is then warmed prior to entering a de-ethanizer where ethane, ethylene, and carbon dioxide are separated from the de-ethanizer bottoms product which consists of the heavier compounds of propylene, propane, butane, pentane and the like. The cold demethanizer residue gas is used to cool the incoming inlet gas stream via an inlet gas cooler, and expanded vapor from a high pressure separator is cross exchanged with the de-ethanizer overhead product stream.
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Aghili Hafez K.
Montgomery, IV George J.
Edwards Robert J.
Hoelter Michael L.
Makay Albert J.
McDermott International Inc.
Warner Steven E.
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