Corrosion control in acid gas removal equipment by the situ generation of polysulfide ions
US8916117B2 · kind B2 · utility
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15Claims
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Key dates
| Filing date | Dec 5, 2013 |
| Grant date | Dec 23, 2014 |
| Priority date | — |
| Expiry date | Dec 5, 2033 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01D2257/602
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A method for the reduction of corrosion in a treatment unit acid used for separating hydrogen sulfide from and acid gas stream using an alkaline absorption solution. Ions comprising the S2− and/or HS− ions formed by the absorption of the hydrogen sulfide in the absorbent solution are subjected to in situ electrochemical oxidization to form polysulfide ions which form a protective coating on the surfaces of the unit.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.