Oxidation of aromatics to hydroxyaromatics using aluminosilicates containing framework titanium
US5233097A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 15, 1992 |
| Grant date | Aug 3, 1993 |
| Priority date | — |
| Expiry date | Oct 15, 2012 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07B41/02
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
Certain crystalline titanoaluminosilicate molecular sieve compositions having titanium, aluminum, and silicon present as framework tetrahedral oxide units are particularly effective in hydroxylating the aromatic nucleus of aromatic compounds using hydrogen peroxide, even where the hydrogen peroxide is used at concentrations of 10 weight percent or less. The variant where the exchangeable hydrogens of the titanoaluminosilicate are replaced by an alkali or alkaline earth metal cation is particularly favored because of the concomitant increase in selectivity. Excellent utilization of hydrogen peroxide often is observed, even when the hydroxylation is effected at temperatures under about 60.degree. C.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.