Process for preparing dicarboxylic acids
US8846975B2 · kind B2 · utility
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19Claims
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Key dates
| Filing date | May 9, 2011 |
| Grant date | Sep 30, 2014 |
| Priority date | — |
| Expiry date | May 9, 2031 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C51/316
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
A process for preparing dicarboxylic acids is described. More particularly a process is described for preparing adipic acid (1,6-hexanedioic acid), by the action of nitric acid, starting from cyclic ketones or alcohols which are the corresponding compounds from the standpoint of the number of carbon atoms, in the presence of one or more oxides of nitrogen at a molar concentration in the reaction mixture of greater than 2.5 mmol per kg of reaction mixture.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.