Process for preparing methacrylic acid
US4440948A · kind A · utility
2Cited by
4References
12Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 22, 1976 |
| Grant date | Apr 3, 1984 |
| Priority date | — |
| Expiry date | Sep 22, 1996 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01J2523/00
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
Methacrylic acid is prepared by reacting methacrolein with molecular oxygen in the vapor phase at a temperature of from 230.degree. C. to 450.degree. C. in the presence of a catalyst having the formula Mo.sub.12 P.sub..alpha.' X.sub..beta.' Y.sub..gamma.' O.sub..delta.' wherein X is at least one member of the group consisting of Cs and Tl:Y is at least one member of the group consisting of Cs and Tl; Y is at least one member of the group consisting of V, Zr, Nb, Ni, Ta and Fe; .alpha.'=0.1-3; .beta.'=0.2-9; .gamma.'=0.1-7; .delta.'=36-100.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.