Regeneration of metal halide catalysts via halogenation
US4069268A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 4, 1975 |
| Grant date | Jan 17, 1978 |
| Priority date | — |
| Expiry date | Nov 4, 1995 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02P20/584
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
Deactivated or partially deactivated hydrocarbon conversion catalysts comprising (a) one or more Lewis acids of the formula MX.sub.n where M is a component selected from Group IIIA, IVB, V, VIB or VIII Elements of the Periodic Table or their mixtures, X is a halogen, and n is the atomic ratio of halogen to M and varies from 1 to 8, and (b) a strong Bronsted acid, may be regenerated by contacting said catalysts with a halogen selected from the group consisting of fluorine or chlorine. If a portion of the catalyst has been hydrolyzed, the catalyst may be regenerated via halogenation as above or by contact with a hydrogen halide selected from the group consisting of hydrogen fluoride or hydrogen chloride and then fluorine. The preferred Lewis acid is a metal halide, preferably tantalum pentafluoride, niobium pentafluoride or mixtures thereof. The preferred Bronsted acid is a hydrogen halide, preferably hydrogen fluoride.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.