Method for purifying high-temperature reducing gas
US5154900A · kind A · utility
Assignees
Inventors
Key dates
| Filing date | Jun 20, 1991 |
| Grant date | Oct 13, 1992 |
| Priority date | — |
| Expiry date | Jun 20, 2011 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01D2259/404
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
In a method for absorbing and removing sulfur compounds such as hydrogen sulfide and carbonyl sulfide present in a high-temperature reducing gas using an absorbent, disclosed is a method for purifying a high-temperature reducing gas which is characterized in that: said method uses at least four towers of reactors filled with an absorbent and comprises four steps which are an absorption step for absorbing and removing sulfur compounds with an absorbent, a regeneration step for regenerating said absorbent using a gas containing oxygen, a cooling step after the regeneration step, and a reduction step for reducing said regenerated and cooled absorbent with a high-temperature reducing gas until the concentration of the reducing gas becomes uniform before and after passing through the absorbent; heat is continuously recovered from the high-temperature gas at the outlet of the regeneration reactor in said regeneration step; and the regeneration and absorption performance is thus stabilized. Also disclosed is a method for purifying a high-temperature reducing gas which is characterized in that this method uses as least four towers filled with an absorbent as in the above method; and an add…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.