Method for eliminating color forming impurities from nitro compounds
US8207382B2 · kind B2 · utility
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10Claims
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Key dates
| Filing date | Apr 8, 2009 |
| Grant date | Jun 26, 2012 |
| Priority date | — |
| Expiry date | May 27, 2029 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C201/16
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
A method for stabilizing nitro compounds against discoloration. The method comprises reacting nitro compounds containing color-forming impurities with nitric acid, neutralizing and washing the product, and distilling therefrom purified nitro compounds.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.