Carbon dioxide hydrocarbons separation process

Details Carbon dioxide hydrocarbons separation process Carbon dioxide hydrocarbons separation process

C - Chemistry, Metallurgy

01

B

23/356

C01B 31/20 (2006.01) B01D 53/14 (2006.01) C07C 7/11 (2006.01) E21B 43/40 (2006.01)

Patent

CA 1224911

CARBON DIOXIDE HYDROCARBONS SEPARATION PROCESS ABSTRACT OF THE DISCLOSURE Carbon dioxide is separated from light hydrocarbons such as methane and ethane by absorbing CO2 gas with water at a pressure of at least 500 psia thus avoiding the CO2- C2H6 azeotrope problem. The CO2 is recovered from the absorbing water by pressure reduction and flashing and/or by heating and flashing. The process is particularly applicable to the recovery of high pressure pure carbon dioxide from the wellhead products of carbon dioxide flooding used in enhanced oil recovery. The high pressure pure carbon dioxide is liquified and reinjected to the well at the desired pressure.

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