Hydrocarbon conversion processes using improved transition metal oxide catalysts
US4419222A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 18, 1981 |
| Grant date | Dec 6, 1983 |
| Priority date | — |
| Expiry date | Dec 18, 2001 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC10G11/04
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
Hydrocarbons are cracked by contacting, in a cracking zone and at elevated temperature, a hydrocarbon feed with an acid catalyst comprising at least a catalytic metal oxide component wherein said metal is selected from the group consisting essentially of (a) tungsten, niobium and mixtures thereof and (b) mixtures of (a) with tantalum, hafnium, chromium, titanium, zirconium and mixtures thereof, and wherein said catalytic metal oxide component is supported on a silica-containing inorganic refractory metal oxide support the silica content of which is less than 50 wt. % of the total support, said catalyst being steamed prior to use at a temperature at least 600.degree. C. In a preferred embodiment, the support will comprise a mixture of silica and the .gamma.-alumina wherein the silica content is less than 25 wt. % thereof. Further, one may employ steam in the cracking zone.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.