Methods and apparatus for sulfur recovery from acid gases
US8444943B2 · kind B2 · utility
39Cited by
22References
27Claims
0Family size
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Key dates
| Filing date | Apr 30, 2010 |
| Grant date | May 21, 2013 |
| Priority date | — |
| Expiry date | Dec 31, 2030 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02P20/129
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
Apparatus and methods for recovering sulfur from acid gases. Acid gases containing relatively high amounts of carbonyl sulfide and/or one or more types of mercaptans can be treated in a sulfur recovery system employing an acid gas enrichment zone and a tail gas treatment zone, where partially-loaded sulfur absorbing solvent from the tail gas treatment zone is employed for sulfur absorption in the acid gas enrichment zone. Off-gas from the acid gas enrichment zone can be combined and hydrogenated with a sulfur recovery unit tail gas thereby increasing the total amount of sulfur recovery from the initial acid gas.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.