Oxide catalyst, process for producing oxide catalyst, process for producing unsaturated acid, and process for producing unsaturated nitrile
US9427727B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 3, 2011 |
| Grant date | Aug 30, 2016 |
| Priority date | — |
| Expiry date | Jan 4, 2033 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02P20/52
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
Disclosed is a process for producing an oxide catalyst for use in the gas-phase catalytic oxidation reaction or the like of propane or the like, the process comprising the steps of: (I) obtaining a preparation containing compounds of Mo, V, Nb, and Sb or Te at the predetermined atomic ratios; (II) drying the preparation to obtain a dry powder; and (III) calcining the dry powder, wherein the step (III) comprises the step of calcining the dry powder in the presence of a compound containing W in the form of a solid to obtain a pre-stage calcined powder or a mainly calcined powder, or the step of calcining the dry powder and calcining the obtained pre-stage calcined powder in the presence of the solid to obtain a mainly calcined powder, the solid satisfies the predetermined conditions, and the oxide catalyst comprises a catalytic component having the predetermined composition.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.