Catalyst for selective hydrogenation of nitro groups of halonitro aromatic compounds
US7425520B2 · kind B2 · utility
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Key dates
| Filing date | Jun 18, 2007 |
| Grant date | Sep 16, 2008 |
| Priority date | — |
| Expiry date | Jun 18, 2027 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01J2531/828
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A supported catalyst for hydrogenating nitro groups of halonitro compounds manufactured from a support, a solvent, and one or more types of organometallic complexes. The organometallic complexes have the formula:wherein, R1-R6 are independently an R, OR, OC(═O)R, halogen, or combination thereof, where R stands for an alkyl or aryl group; Y1-Y4 are independently an O, S, N, or P atom; and M is a metal atom. The supported catalysts show much higher selectivity and activity when used to hydrogenate nitro groups on halonitro aromatic compounds than catalyst currently being used for such hydrogenation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.