Distillative processing of co.sub.2 and hydrocarbons for...

Details Distillative processing of co.sub.2 and hydrocarbons for... Distillative processing of co.sub.2 and hydrocarbons for...

F - Mech Eng,Light,Heat,Weapons

25

J

166/33

F25J 3/02 (2006.01) E21B 43/16 (2006.01) E21B 43/40 (2006.01)

Patent

CA 1272679

ABSTRACT OF THE DISCLOSURE A method of treating CO2 rich gas for injection into a petroleum reservoir is described. CO2 rich gas containing methane, nitrogen, ethane, propane, butanes, and heavier components is distilled such that substan- tially all of the heavier components are produced as a bottoms product and substantially all of the CO2, ethane, and propane are produced as an overhead vapor. The presence of ethane and propane in the overhead vapors overcomes the effect of nitrogen and methane on minimum miscibility pressure in the reservoir, and the problems created by CO2 freezing and the CO2/ethane azeotrope are avoided, furthermore, a readily marketable liquid product is produced.

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