申请人:SUMITOMO CHEMICAL COMPANY, LIMITED
公开号:EP0602616A1
公开(公告)日:1994-06-22
Disclosed is a process for producing a 4-nitrosodiphenylamine of the formula (2)
wherein R₁ and R₂ independently represent a hydrogen atom, methyl group, ethyl group, cyclohexyl group, methoxy group, ethoxy group or chlorine or bromine atom, or a salt thereof, comprising treating a diphenylamine represented by the formula (1)
wherein R₁ and R₂ are as defined above with (i) a mixture of nitrogen oxides, (ii) a hydrogen halide and (iii) an aliphatic alcohol, wherein the atomic ratio of oxygen to nitrogen of the mixture of nitrogen oxides is more than 1.0 and less than 2.0. This process produces 4-nitrosodiphenylamine of the formula (2) or a salt thereof conveniently and effectively, and is industrially advantageous.
公开了一种生产式 (2) 的 4-亚硝基二苯胺的工艺
其中 R₁ 和 R₂ 各自代表氢原子、甲基、乙基、环己基、甲氧基、乙氧基或氯原子或溴原子,或其盐,包括处理式 (1) 所代表的二苯胺
其中 R₁ 和 R₂ 如上文所定义,(i) 氮氧化物混合物,(ii) 卤化氢和 (iii) 脂肪醇,其中氮氧化物混合物中氧与氮的原子比大于 1.0,小于 2.0。该工艺能方便有效地生产出式(2)的 4-亚硝基二苯胺或其盐类,具有工业优势。