Conversion of acid gas to sulphate or phosphate-based fertilizers
US9187379B2 · kind B2 · utility
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21References
13Claims
0Family size
Assignee
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Key dates
| Filing date | Apr 20, 2012 |
| Grant date | Nov 17, 2015 |
| Priority date | — |
| Expiry date | Apr 20, 2032 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC05D9/02
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A method is disclosed for producing sulphate or phosphate-based fertilizer from hydrogen sulphide. The method involves feeding a stream containing a substantial volume of hydrogen sulphide and air to a furnace, where it is burned to produce a sulphur dioxide rich gas stream. The sulphur dioxide rich gas stream is then fed to a reactor to produce a sulphuric acid stream and a waste stream comprising carbon dioxide, nitrogen, oxygen, trace impurities and trace amounts of unreacted sulphur dioxide. The sulphuric acid stream is finally converted to a sulphate or phosphate-based fertilizer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.