文献类型：专利

英文题名：Preparation of alkyl substituted aromatic diamine, e.g. 4,4-diaminobutyl diphenylmethane, by mixing alkylaniline, formaldehyde, organic solvent and catalyst in presence of nitrogen, filtering and recycling catalyst, and vacuum rectifying

作者：LI D;LIU Z;WANG X;XU Q

机构：[1]UNIV EAST CHINA SCI & TECHNOLOGY

申请号：CN101659617-A

申请日：2009-09-10

公开日：2010-03-03

语种：英文

收录：DERWENT

摘要：NOVELTY - An alkyl substituted aromatic diamine is prepared by mixing alkylaniline, formaldehyde and organic solvent at a ratio of 10:1-2:1 in a reactor with a reflux condenser; adding catalyst; stirring at 100-150 degrees C for 1-2 hours in the presence of highly-pure nitrogen; subjecting obtained product to centrifuge; filtering and recycling the catalyst; vacuum rectifying the filtrate liquid while recycling organic solvent and un-reacted alkylaniline; dissolving dried product in ethanol; and re-crystallizing. The mixing ratio of catalyst and formaldehyde is 1:2-50. USE - Method of preparing an alkyl substituted aromatic diamine (claimed), preferably 4,4-diamino-3,3-di-tert-butyl-diphenylmethane. ADVANTAGE - The method utilizes recyclable catalyst having high activity.