Catalyst for the production of methacrylic acid
US5153162A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 29, 1990 |
| Grant date | Oct 6, 1992 |
| Priority date | — |
| Expiry date | Aug 29, 2010 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01J2523/00
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A catalyst for the production of methacrylic acid composed of an inert carrier and a catalytically active substance. The catalytically active substance layer being composed of oxides represented by the following formula (I) EQU Mo.sub.a P.sub.b a.sub.c B.sub.d C.sub.e D.sub.f O.sub.x (I) where Mo represents molybdenum, P represents phosphorus, A represents at least one element selected from arsenic, antimony, germanium, bismuth, zirconium, cerium and selenium, B is at least one element selected from copper, iron, chromium, nickel, maganese, cobalt, tin, silver, zinc, palladium, rhodium and tellurium, C represents at least one element selected from vanadium, tungsten and niobium, D represents at least one element selected from alkali metals, alkaline earth metals and thallium, and O represents oxygen, a, b, c, d, e, f and x respectively represent the atomic ratios of Mo, P, A, B, C, D and O, and when a=12, b=0.5-4, c=0-5, d=0-3, e=0-4, and f=0.01-4, and x is a numerical value determined by the oxidation states of these elements. The catalytically active substance layers are formed by mixing compounds of the elemental components of the oxides of formula (I), as required, heating them…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.