Carbon dioxide hydrocarbons separation process
US4576615A · kind A · utility
13Cited by
7References
7Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 20, 1984 |
| Grant date | Mar 18, 1986 |
| Priority date | — |
| Expiry date | Aug 20, 2004 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02P20/151
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
Carbon dioxide is separated from light hydrocarbons such as methane and ethane by absorbing CO.sub.2 gas with water at a pressure of at least 500 psia thus avoiding the CO.sub.2 --C.sub.2 H.sub.6 azeotrope problem. The CO.sub.2 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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.