Process for producing ammonia and sulfur dioxide
US4990319A · kind A · utility
2Cited by
8References
10Claims
0Family size
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Inventors
Key dates
| Filing date | Mar 13, 1989 |
| Grant date | Feb 5, 1991 |
| Priority date | — |
| Expiry date | Mar 13, 2009 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01L2224/48091
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A process for producing NH.sub.3 and SO.sub.2 from ammonium sulfate, which comprises PA0 (i) reacting ammonium sulfate with a metal oxide or hydroxide at a temperature of not more than 200.degree. C. to form NH.sub.3, water and a metal sulfate and recovering NH.sub.3, PA0 (ii) decomposing the metal sulfate in the presence of a reducing agent to form a metal oxide and SO.sub.2 and recovering SO.sub.2, and PA0 (iii) recycling the metal oxide to step (i) as such or after it is converted to a metal hydroxide.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.