Patent ID: 8529666

Claim:
A process comprising: obtaining produced gas from a source of produced gas, said produced gas including hydrocarbon gas, natural gas liquids and waste gas including at least carbon dioxide; dehydrating the produced gas to form an inlet stream; removing the natural gas liquids from said inlet stream; cooling said inlet stream; providing a fractionation tower; supplying said inlet stream to said fractionation tower; fractionating said inlet stream in said fractionation tower to form a first gas stream including said hydrocarbon gas and a portion of said waste gas, and to form a waste liquid stream including the other portion of said waste gas as liquid; separating said first gas stream into a stream of hydrocarbon gas and a return stream of separate waste gas; supplying said return stream for fractionation with said inlet stream in said fractionation tower; supplying said stream of hydrocarbon gas as an output; and supplying said waste liquid stream as a waste output.