| 摘要 |
PURPOSE:To produce the titled compound having high whiteness or transparency and useful as a stabilizer of a lubricant, etc., economically in an industrial scale, by reacting a diphenylamine compound with a specific olefinic hydrocarbon in a specific atmosphere in the presence of a silica-alumina catalyst. CONSTITUTION:The compound of formula (R1 and R2 are H or 1-18C alkyl; at least one side of the p-position of the benzene nucleus is vacant) is made to react with a 4-18C aliphatic and/or aromatic hydrocarbon having olefinic double bond in the molecule, in an inert gas atmosphere or in an air-free atmosphere, in the presence of at least one kind of silica-alumina catalyst selected from acidic clay, active clay and silica-alumina. A p-substituted diphenylamine such as p-octylated diphenylamine having high whiteness or transparency can be produced suppressing the production of colored substance, without necessitating a purification procedure, directly, in high yield, with simple operation. |
