| 摘要 |
1426929 Diphenylamines SNAMPROGETTI SpA 12 June 1973 [24 June 1972] 27972/73 Heading C2C A process for producing diphenylamine or a derivative thereof comprises reacting an imine having the formula wherein each of R<SP>1</SP>, R<SP>2</SP>, R<SP>3</SP>, R<SP>4</SP> and R<SP>5</SP>, which can be the same or different, is a hydrogen or halogen atom or alkyl, phenyl, amino, alkoxy or hydroxy group with oxygen or a gaseous mixture including oxygen, at a temperature in the range 300‹ to 450‹ C. Catalysts may be employed, active silica being preferred. Examples describe the preparation of 4-chloro-, 4-methoxy- and 4-methyldiphenylamines and diphenylamine. |
