Silica-alumina catalyst support, catalysts made therefrom and methods of making and using same
US7541310B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 12, 2004 |
| Grant date | Jun 2, 2009 |
| Priority date | — |
| Expiry date | Dec 20, 2026 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01J2235/15
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
This invention relates to catalysts comprising a catalytic metal deposited on a composite support with well-dispersed chemical “anchor” species acting as nucleation centers for catalytic metal crystallites growth. The catalysts have the advantage that the average catalytic metal crystallite size can be controlled by the molar ratio of catalytic metal to chemical “anchor,” and is not limited by the porous structure of the support. A preferred embodiment comprises a cobalt-based catalyst on a silica-alumina support made by a co-gel method, wherein its average pore size can be controlled by the pH. The alumina species in the support most likely serve as chemical “anchors” to control the dispersion of cobalt species, such that the average cobalt crystallite size can be greater than the average pore size.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.