Sulfur recovery process
US5021232A · kind A · utility
10Cited by
9References
36Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 29, 1989 |
| Grant date | Jun 4, 1991 |
| Priority date | — |
| Expiry date | Sep 29, 2009 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S62/922
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A sulfur recovery process including a Claus reaction wherein sulfur-containing compounds are converted to elemental sulfur in the presence of a stoichiometric excess of hydrogen sulfide. The sulfurous compounds in the tail gas of the Claus reaction are separated for recycle using crystallization. Liquid carbon dioxide absorption is used to separate substantially all sulfur-containing compounds from a residual tail gas suitable for venting to the atmosphere.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.