Oxidation of substituted p-xylenes to substituted terephthalaldehydes
US4140722A · kind A · utility
3Cited by
3References
17Claims
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Assignee
Inventors
Key dates
| Filing date | Mar 21, 1977 |
| Grant date | Feb 20, 1979 |
| Priority date | — |
| Expiry date | Mar 21, 1997 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01J37/0236
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
Substituted terephthalaldehydes are produced by the vapor phase oxidation of similarly substituted p-xylenes in the presence of a catalyst mixture of tungsten in the form of an oxide or silicotungstic acid, molybdenum in the form of an oxide and optionally bismuth in the form of an oxide.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.