Nitrosation process
US4242277A · kind A · utility
2Cited by
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11Claims
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Key dates
| Filing date | May 30, 1979 |
| Grant date | Dec 30, 1980 |
| Priority date | — |
| Expiry date | May 30, 1999 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C209/76
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
In the process of subjecting a compound selected from phenols, N,N-dialkylanilines and mixtures thereof to nitrosation reaction conditions using a nitrite in an aqueous system to prepare nitrosated products selected from benzoquinone oximes and p-nitroso-N,N-dialkylanilines, the nitrosation reaction is advantageously carried out in the presence of an acid stronger than nitrous acid an organic acid of pKa 2 to pKa 5 or a salt thereof and water, the quantities of the organic acid and water being up to 5 times by mole and up to 10 times by weight the quantity of the compound to be nitrosated, respectively.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.