Method for improving reducing potential of natural gas feed
US5399323A · kind A · utility
8Cited by
10References
11Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 11, 1993 |
| Grant date | Mar 21, 1995 |
| Priority date | — |
| Expiry date | May 11, 2013 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC01B17/44
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A means to increase the reducing potential of natural gas used in the reduction of sulfates such as gypsum. A reducing mixture of natural gas and air (or oxygen) is heated prior to reduction of the sulfate. For gypsum reduction, heating the reducing mixture to 1500.degree. F. (816.degree. C.) prior to gypsum reduction increased the gypsum conversion to calcium sulfide to above 65% at a reactor temperature of 1400.degree.-1500.degree. F. (700.degree.-816.degree. C.) verses less than a 40% conversion rate when an unheated reducing mixture was used.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.