Process and device for separation of at least one acid gas that is contained in a gas mixture
US6442969B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | May 2, 2001 |
| Grant date | Sep 3, 2002 |
| Priority date | — |
| Expiry date | May 2, 2021 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S62/929
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
For the separation of acid, carbon dioxide and/or hydrogen sulfide from a gaseous mixture comprising at least one lighter gas, e.g. methane, the gaseous mixture (1) is precooled at least once during a heat exchange operation E2; the resultant precooled gas mixture, flowing upwardly is cooled and rectified simultaneously in an approximately vertical heat exchange zone (ER) forming a downwardly-flowing countercurrent liquid reflux; the resultant rectified gaseous fraction (8) depleted in acid gases and enriched in light gas is collected at the top of the vertical exchange zone; and (d) a liquid fraction (4) enriched in acid gas components is collected at the bottom of the exchange zone. The collected liquid fraction (4) can be expanded and evaporated to provide cooling. The system has particular application for the treatment of natural gas or in petroleum refining or recovery operations.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.