【摘要】 <正> 4,4′-四甲二氨基二苯甲烷为染料的重要中间体与铅试剂,并且还是环氧树脂固化的优良促进剂。文献中虽不乏其合成方法的报导,诸如,以盐酸为催化剂的经典的Cohen法,过氧化二乙酰法,以及过苯甲酸叔丁酯法等,唯其或收率低,或反应时间长,或原料成本高,或操作复杂,均欠理想。本文为Cohen法的改进,采用草酸-盐酸为混合催化剂,更多还原

【Abstract】 The synthetic method of 4,4’-tetramethyldiaminodiphenylmethane has been improvedusing oxalic acid and hydrochloric acid as catalysts. The Optimum reaction conditions of thesynthesis are: (1) the molar ratio of N,N-dimethylaniline to formaldehyde: 1.7: 1, (2)weightof oxalic acld and hydrochloric acid:74% and 14% to the weight of N,N-dimethylaniline,respectively and (3)reaction time: 3 hours.更多还原