Process for purification by combination of an effluent that contains carbon dioxide and hydrocarbons
US6505683B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 27, 2001 |
| Grant date | Jan 14, 2003 |
| Priority date | — |
| Expiry date | Apr 27, 2021 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02P20/151
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
For the purification of an effluent that contains carbon dioxide and hydrocarbons resulting from a carbon dioxide-assisted recovery stage, the effluent is circulated in a gas-liquid separator (3) to recover C3+ liquid and a gas that contains carbon dioxide and, for example, less than 10% of methane and ethane. Pressurized combustion (13) of the gas with air produced a combustion gas (21) enriched with carbon dioxide and water vapor. The combustion gas (21) is cooled (11) (22) to recover heat, and the cooled combustion gas is recycled under pressure by a compressor (27) to an injection well (29). Nitrogen is at least partly separated from the combustion gas before the recycling, and in an optional intermediate step the condensed water is also separated from the carbon dioxide. The invention has a particular application for the assisted recovery of petroleum by CO2 with a reduction of the greenhouse effect.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.