Separating basic asphaltenes using transition metal oxide acid catalysts
US4424114A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 24, 1981 |
| Grant date | Jan 3, 1984 |
| Priority date | — |
| Expiry date | Sep 24, 2001 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC10G25/003
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
Basic asphaltenes are selectively removed from asphaltene-containing hydrocarbon feeds by contacting the feed with a transition metal oxide solid acid catalyst which selectively adsorbs the basic asphaltenes. The catalyst will comprise a catalytic metal component selected from the group consisting essentially of oxides of (a) tungsten, niobium, and mixtures thereof and (b) mixtures of (a) with tantalum, hafnium, chromium, titanium, zirconium and mixtures thereof, supported on an inorganic refractory oxide support such as alumina. Asphalt-laden catalyst is separated from the feed, the asphaltenes adsorbed thereon are cracked off in the presence of steam and the catalyst is regenerated and recycled back to the adsorption zone.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.