Preparation of maleic anhydride from four-carbon hydrocarbons
US4052418A · kind A · utility
16Cited by
9References
9Claims
0Family size
Assignee
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Key dates
| Filing date | Aug 6, 1975 |
| Grant date | Oct 4, 1977 |
| Priority date | — |
| Expiry date | Aug 6, 1995 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C51/252
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
Catalysts comprising the combined oxides of vanadium and at least one element selected from the group consisting of boron, niobium, tantalum, antimony, tungsten and chromium have been found to be especially effective in the oxidation of n-butane, n-butenes and butadiene, or a mixture thereof with molecular oxygen in the vapor phase to yield maleic anhydride. The catalysts of the present invention may be further promoted with additional elements to enhance activity, stability and selectivity. The reaction with n-butane gives an especially pure product in good yield and selectivity.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.