Vanadyl pyrophosphate oxidation catalyst precursors
US5905052A · kind A · utility
4Cited by
8References
3Claims
0Family size
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Key dates
| Filing date | Jul 30, 1997 |
| Grant date | May 18, 1999 |
| Priority date | — |
| Expiry date | Jul 30, 2017 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01J2523/00
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
Vanadyl pyrophosphate oxidation catalyst precursors comprise vanadium phosphate esters of the formula EQU (VO)(((R.sub.1-x /H.sub.x)OPO.sub.3).multidot.((ROH).sub.y /(H.sub.2 O).sub.z) wherein, R is an alkyl group capable of bonding, through oxygen, to phosphorus to form a phosphate ester; x is 0 to about 0.5; y is 0-1.0; z is 0-1.25; and y+z is 0-1.25 are particularly useful for the selective oxidation of butane to maleic anhydride and readily thermally decompose to form the vanadyl pyrophosphate oxidation catalysts.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.