Process for manufacturing haloaryl compounds from mixtures of isomers of dihalodiarylsulfone
US9212111B2 · kind B2 · utility
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15Claims
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Key dates
| Filing date | Dec 11, 2012 |
| Grant date | Dec 15, 2015 |
| Priority date | — |
| Expiry date | Dec 11, 2032 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C315/00
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
A process for the manufacture of a haloaryl compound which comprises contacting a mixture of dihalodiarylsulfone isomers [mixture (M)] with sulfuric acid to provide a mixture of haloarylsulfonic acid isomers [mixture (M1)] and reacting mixture (M1) in the presence of water. The process is independent on the manufacturing process of mixture (M) and is advantageous in that the obtained haloaryl compound can be recycled to the first step of a dihalodiarylsulfone manufacturing process.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.