Method of preparing W or Mo metal oxides
US4339424A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 20, 1981 |
| Grant date | Jul 13, 1982 |
| Priority date | — |
| Expiry date | Mar 20, 2001 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC01P2006/60
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A process for preparing W, Mo or mixed metal oxides thereof by oxidizing a reduced metal oxide of the formula (NH.sub.m R.sub.4-m).sub.q.sup.+ MO.sub.p where each R is independently C.sub.1 -C.sub.20 aliphatic, C.sub.7 -C.sub.14 araliphatic or C.sub.3 -C.sub.8 cycloaliphatic with the proviso that adjacent R's, together with the nitrogen atom to which they are attached, may form a 5, 6 or 7 membered heterocyclic ring, m is an integer from 0 to 4, q is a number from about 0.001 to 1/3, M is W or Mo and p is a number from 2 to 3 with aqueous hydrogen peroxide. The so-treated reduced metal oxide is isolated and heated in an oxygen containing atmosphere to form metal oxides of the formula MO.sub.p.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.