Membrane/distillation method and system for extracting CO2...

Details Membrane/distillation method and system for extracting CO2... Membrane/distillation method and system for extracting CO2...

2006-10-24

2006-10-24

Doerrler, William C. (Department: 3744)

Refrigeration

Cryogenic treatment of gas or gas mixture

Separation of gas mixture

C062S929000

Reexamination Certificate

active

07124605

ABSTRACT:
A method of separating CO2from a hydrocarbon gas inlet stream that is within predetermined pressure and temperature ranges, including the steps of subjecting the inlet stream to fractional distillation providing a CO2bottom product stream and a distillation overhead stream, passing the distillation overhead stream to the inlet of a primary reflux drum producing a primary reflux liquid stream and a hydrocarbon vapor stream, subjecting the hydrocarbon vapor stream to membrane separation to provide a hydrocarbon product stream and a permeate stream, compressing the permeate stream and recycling the compressed permeate stream to the inlet of the primary reflux drum thereby providing a CO2liquid product and a hydrocarbon gas product.

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Schendel, Ronald; “Process can efficiently treat gase assocated with CO2 miscible flood”, Oil and Gas Journal, Jul. 1983.

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