Catalyst regeneration via reduction with hydrogen
US6632765B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Jun 23, 2000 |
| Grant date | Oct 14, 2003 |
| Priority date | — |
| Expiry date | Jul 5, 2020 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01J23/96
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
Methods of regenerating a coked catalyst by treatment with a hydrogen-containing gas, where the coke is not removed from the catalyst via combustion with an oxygen-containing gas, are disclosed. The hydrogen-containing gas can be hydrogen itself, syngas (a mixture of hydrogen and carbon monoxide), or, if the catalyst is a dehydrogenation catalyst or if a dehydrogenation catalyst is in-line with the coked catalyst, the reaction product of the catalytic dehydrogenation of a C2-5 alkane, preferably ethane. The method is an improvement over conventional catalyst regeneration methods which first oxidize the coke to form carbon monoxide and an oxidized form of the catalyst, and then reduce the oxidized form of the catalyst so it can be re-used. The present method removes the coke without requiring an oxidation step.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.