Process for the selective oxidation of olefins with photochemical illumination of semiconductor powder suspensions
US4571290A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 22, 1984 |
| Grant date | Feb 18, 1986 |
| Priority date | — |
| Expiry date | Aug 22, 2004 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C45/35
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A process for the selective oxidation of olefins comprises the steps of forming a suspension of semiconductor powder in a solvent media, adding an olefin to the solvent media in the presence of an oxidant to form a mixture and, photochemically activating the mixture with illumination having an energy at least equal to the band gap of the semiconductor powder wherein the selectivity is controlled by the selection of A, of the solvent and of the oxidant. The process is one carried out at about ambient temperature and with gentle agitation. The semiconductor powder has the general formula A.sub.x B.sub.y C.sub.z where A is selected from Bi, Sn, Pt, Pd, Cu, Fe, W, V, Sb, Mo, Ru or Ag and mixtures thereof; B is Te, Sb, Ti, Cd, Mo, V or W and mixtures thereof; C is O or S; x equals 0 to 5; y equals 1 to 3; and z is a number necessary to satisfy the other elements, and is optionally metallized by an element selected from Pt, Pd, Cu or Ag.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.