FIELD: industrial synthesis of p-aminophenol. SUBSTANCE: p-aminophenol is stock for production of stabilizers for polymeric materials, paints and photo reagent. Process of nitrosation of phenol is carried out by gradually adding liquefied nitrous anhydride to mixture of phenol, water and catalyst at 0+-2 C in reaction mixture. Catalyst is ammonium chloride or hydrochloric acid. Present invention is useful for widening range of stock materials used, cutting down waste and making the desired product cheaper. EFFECT: more efficient preparation method. 2 cl, 2 ex
| Title | Year | Author | Number |
|---|---|---|---|
| METHOD OF PREPARING NITROPHENOLS | 1994 |
|
RU2105754C1 |
| METHOD FOR SYNTHESIS OF P-NITROSOPHENOL AND DEVICE FOR PRODUCING P-NITROSOPHENOL BY THIS METHOD | 2023 |
|
RU2813692C1 |
| METHOD OF PRODUCING n-ACETYLAMINOPHENOL | 2012 |
|
RU2495865C1 |
| METHOD FOR CONTINUOUS SYNTHESIS OF 4-NITROSOPHENOL | 2021 |
|
RU2762969C1 |
| METHOD FOR PRODUCING PARACETAMOL | 2011 |
|
RU2461543C1 |
| METHOD OF PRODUCING P-AMINOPHENOL AND DEVICE FOR PRODUCING P-AMINOPHENOL USING THIS METHOD | 2023 |
|
RU2822065C1 |
| METHOD AND UNIT FOR OBTAINING PARA-AMINOPHENOL FROM PHENOL BY SEQUENTIAL NITROSATING AND REDUCTION WITH AMMONIUM SULFIDE | 2023 |
|
RU2801692C1 |
| METHOD AND APPARATUS FOR PRODUCING PARACETAMOL FROM PHENOL | 2023 |
|
RU2814270C1 |
| METHOD FOR PRODUCTION OF P-NITROSOPHENOL | 1995 |
|
RU2076096C1 |
| METHOD AND APPARATUS FOR CONTINUOUS PRODUCTION OF PARA-AMINOPHENOL BY REDUCTION OF PARA-NITROSOPHENOL WITH AMMONIUM SULPHIDE | 2023 |
|
RU2823871C1 |
