申请人:MITSUI TOATSU CHEMICALS, Inc.
公开号:EP0630881A1
公开(公告)日:1994-12-28
A diphenylamine with both the phenyl groups being substituted is prepared by reacting a phenol with ammonia in the presence of a hydrogen transfer catalyst and a cyclohexanone; or by converting a portion of the phenol to the cyclohexanone in the presence of a hydrogen transfer catalyst and under hydrogen pressure and then reacting the remaining portion of the phenol with ammonia in the presence of the cyclohexanone so converted and the hydrogen transfer catalyst. The diphenylamine can be obtained very efficiently.
在氢转移催化剂和环己酮的作用下,使苯酚与氨反应;或在氢转移催化剂和氢气压力的作用下,使部分苯酚转化为环己酮,然后在转化的环己酮和氢转移催化剂的作用下,使剩余部分苯酚与氨反应。这样就可以非常有效地获得二苯胺。