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1. (WO2018044263) THREE COLUMN HYDROCARBON RECOVERY FROM CARBON DIOXIDE ENHANCED OIL RECOVERY STREAMS

Pub. No.:    WO/2018/044263    International Application No.:    PCT/US2016/049283
Publication Date: Fri Mar 09 00:59:59 CET 2018 International Filing Date: Tue Aug 30 01:59:59 CEST 2016
IPC: C07C 7/00
Applicants: PILOT ENERGY SOLUTIONS, LLC
Inventors: PRIM, Eric
Title: THREE COLUMN HYDROCARBON RECOVERY FROM CARBON DIOXIDE ENHANCED OIL RECOVERY STREAMS
Abstract:
A method for recovering hydrocarbons with only three multistage columns includes receiving a carbon dioxide recycle stream. The carbon dioxide recycle stream is separated in a first multistage column to produce a purified carbon dioxide recycle stream and a light hydrocarbon stream. The light hydrocarbon stream is separated in a second multistage column to produce a second purified carbon dioxide recycle stream and a natural gas liquids stream. The natural gas liquids stream is separated in a third multistage column to produce a C3 hydrocarbon product stream and a C4-C8 hydrocarbon product stream. The first multistage column, the second multistage column, and the third multistage column are the only three multistage columns used in the method.