申请人:Honshu Chemical Industry Co. Ltd.
公开号:EP0995737A1
公开(公告)日:2000-04-26
A process for producing a 3,3,5-trimethylcyclohexylidenebisphenol of formula (11):
wherein R1 and R2 can be the same or different and represent hydrogen or C1-C4 alkyl, each R1 substituent being the same or different and each R2 substituent being the same or different, provided that the R1 and R2 substituents on a given phenyl moiety are not simultaneously C4 alkyl,
which process comprises:
(a) reacting a phenol (A) of formula (I)
wherein R1 and R2 are as defined above, with 3,3,5-trimethylcyclohexanone (B) at a molar ratio ((A)/(B)) of from 3 to 7 in the presence of an acid catalyst until the 3,3,5-trimethylcyclohexanone (B) exhibits at least 90 mol% conversion; and
(b) adding a phenol (A) of formula (I) wherein R1 and R2 are as defined above and/or an aromatic hydrocarbon (C) to the thus obtained reaction mixture.
一种生产式(11)的 3,3,5-三甲基环己亚基双酚的工艺:
其中 R1 和 R2 可以相同或不同,代表氢或 C1-C4 烷基,每个 R1 取代基可以相同或不同,每个 R2 取代基可以相同或不同,条件是给定苯基上的 R1 和 R2 取代基不能同时为 C4 烷基、
该工艺包括
(a) 使式(I)的苯酚(A)反应
其中 R1 和 R2 如上定义,与 3,3,5-三甲基环己酮 (B) 在酸催化剂存在下以 3 至 7 的摩尔比((A)/(B))反应,直到 3,3,5-三甲基环己酮 (B) 显示出至少 90 摩尔%的转化率;以及
(b) 将式 (I) 苯酚 (A) (其中 R1 和 R2 如上文所定义)和/或芳香烃 (C) 加入由此获得的反应混合物中。