Method for preparing bis (3-ethyl-5-methyl-4-maleimidobenzene) methane catalyzed by supported catalyst

• Main Authors: HONG JIE, QIU LI, LIU YINGJIU, CAI GUANGWEI, ZHANG GANG, DENG JIALUN, LI XIANG, LI ZIYONG, LIU XIAOCHENG
• Format: Patent
• Language: Chinese; English
• Published: 29.11.2019
• Subjects: CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOIDCHEMISTRY; CHEMISTRY; HETEROCYCLIC COMPOUNDS; METALLURGY; ORGANIC CHEMISTRY; PERFORMING OPERATIONS; PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL; THEIR RELEVANT APPARATUS; TRANSPORTING

The invention relates to a method for preparing bis (3-ethyl-5-methyl-4-maleimidobenzene) methane catalyzed by a supported catalyst. The method uses 4,4'- methylene bis (6-methyl- 2 -ethyl aniline) and maleic anhydride as raw materials, and uses a self-made supported catalyst to catalyze dehydration and cyclization to prepare the bis (3-ethyl-5-methyl-4-maleimidobenzene) methane. The catalyst hasgood effect, low reaction temperature, high yield, high product purity, good quality and low cost. The catalyst and a reaction solvent can be directly recycled, thus reducing pollutant emission, beingenvironment-friendly and low in cost. The catalyst and the reaction solution are applied several times, the total yield is 84.5-93.6%, and the bis (3-ethyl-5-methyl-4-maleimidobenzene) methane has acontent of over 99.0% (HPLC). 本发明涉及一种负载型催化剂催化制备双(3-乙基-5-甲基-4-马来酰亚胺基苯)甲烷的方法。该方法以4,4'-亚甲基双(6-甲基-2-乙基苯胺)和顺丁烯二酸酐为原料，以自制负载型催化剂催化脱水、环合，制备双(3-乙基-5-甲基-4-马来酰亚胺基苯)甲烷，本发明催化剂效果好，反应温度低，收率高，产品纯度高，品质好，成本低。催化剂及反应溶剂可以直接循环套用，减少污染物排放，环境友好，成本低。催化剂