Add-on hydrogen sulfide trap
US4895824A · kind A · utility
3Cited by
12References
16Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Sep 8, 1987 |
| Grant date | Jan 23, 1990 |
| Priority date | — |
| Expiry date | Sep 8, 2007 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S502/517
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
An add-on H.sub.2 S trap for use after an auto exhaust catalyst has an H.sub.2 S-getter metal oxide which traps the H.sub.2 S by the following reaction: EQU MO+H.sub.2 S.fwdarw.MS+H.sub.2 O and the H.sub.2 S-getter metal oxide is self-regenerating via the following reaction: ##STR1## The H.sub.2 S-getter metal oxide has little tendency to form sulfates at a temperature greater than approximately 500.degree. C. Preferred metal oxides are iron, nickel and cobalt and they can be distended over a support.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.