Reductive combustion of ammonium salts of sulfuric acid
US6342651B1 · kind B1 · utility
0Cited by
86References
42Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 4, 2000 |
| Grant date | Jan 29, 2002 |
| Priority date | — |
| Expiry date | Aug 4, 2020 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C319/20
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
A process is provided for the combustion of ammonium salts of sulfuric acid contained in aqueous media. More particularly, a reductive combustion process which produces a combustion gas containing a divalent sulfur compound having a high concentration of hydrogen sulfide. The process is suitable for combusting ammonium salts of sulfuric acid produced during manufacture of 2-hydroxy-4-methylthiobutanoic acid (HMBA) or methionine. The divalent sulfur compounds in the combustion gas may be further converted to other useful sulfur products and recycled for use in the manufacture of HMBA or methionine.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.