Configurations and methods for acid gas absorption and solvent regeneration
US8398748B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Apr 18, 2006 |
| Grant date | Mar 19, 2013 |
| Priority date | — |
| Expiry date | Nov 22, 2028 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02C20/40
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
Contemplated configurations and methods include a solvent regenerator (58) that has an upper (93) and a lower stripping section (94). Cooled rich solve is used as reflux while heated rich solvent (11) is used as a source of stripping agent in the upper section (91). A reboiler (62) in the lower section provides further stripping agent, hi especially preferred configurations, a portion of lean solved from the regenerator (58) is further stripped in a separate or integrated regenerator (62) to form an ultra-lean solvent. Both lean and ultra-lean solvents are preferably used in a two-stage absorber (52) to thereby from the rich solvent and an offgas that is very low in acid gas.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.