Solvent and catalyst recovery and recycle in the manufacture of phenoxybenzoic acid
US4456767A · kind A · utility
35Cited by
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13Claims
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Key dates
| Filing date | Aug 2, 1983 |
| Grant date | Jun 26, 1984 |
| Priority date | — |
| Expiry date | Aug 2, 2003 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02P20/584
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
An improved process is provided for recovering and recycling reaction medium solvent and cobalt-containing cocatalyst in the oxidation of 3-(substituted phenoxy) toluene to provide the corresponding 3-(substituted phenoxy) benzoic acid, the latter being a useful intermediate in the manufacture of herbicides such as acifluorfen.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.