Process for producing ammonium thiosulfate
US7655211B2 · kind B2 · utility
2Cited by
15References
25Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 22, 2007 |
| Grant date | Feb 2, 2010 |
| Priority date | — |
| Expiry date | Dec 10, 2027 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC01B17/64
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
Process for the production of ammonium thiosulfate from gas streams comprising ammonia and hydrogen sulfide. One embodiment of the invention provides absorbing SO2 into a solution of ammonium sulfite and then contacting gaseous feed streams with portions of the resulting solution in a plurality of contact zones where portions of ammonium sulfite in the liquid streams are converted to ammonium thiosulfate upon contact with the gaseous feed streams.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.