公开(公告)号：US20160068472A1

公开(公告)日：2016-03-10

申请号：US14761890

申请日：2013-11-22

申请人： WANHUA CHEMICAL GROUP CO., LTD. ,  WANHUA CHEMICAL (NINGBO) CO., LTD.

发明人： Xin LI ,  Hao CHEN ,  Congying ZHANG ,  Shan GAO ,  Zhenguo LIU ,  Weijia WANG ,  Lei TANG ,  Zhipeng LIU ,  Yuan LI ,  Qingmei JIANG ,  Jinhong SONG ,  Weiqi HUA ,  Hao DING

IPC分类号： C07C209/72

CPC分类号： C07C209/72 ,  B01J23/96 ,  B01J38/08 ,  C07C2601/14 ,  Y02P20/584 ,  C07C211/36

摘要： Disclosed is a method for preparing diamino-dicyclohexyl methane (H12MDA) by hydrogenation of diamino-diphenyl methane (MDA). In the process, 4,4′-MDA used as the starting material is firstly hydrogenated to prepare 4,4′-H12MDA. When the activity of the catalyst is reduced, the feed is switched from 4,4′-MDA to the mixture of 2,4′-MDA and 4,4′-MDA, and then when the conversion is stabilized, the feed is switched to 4,4′-MDA again. The deactivated catalyst is activated on line by switching the feed to the mixture of 2,4′-MDA and 4,4′-MDA. 4,4′-H12MDA having the trans-trans isomer content of 16˜24 wt % is produced, and the mixture of 2,4′-H12MDA and 4,4′-H12MDA is also produced, wherein the content of 2,4′-H12MDA in the mixture is 4˜15 wt %.

摘要翻译： 公开了通过二氨基二苯基甲烷（MDA）的氢化制备二氨基二环己基甲烷（H12MDA）的方法。 在此过程中，首先氢化4,4'-MDA作为原料，制备4,4'-H12MDA。 当催化剂的活性降低时，进料从4,4'-MDA转变为2,4'-MDA和4,4'-MDA的混合物，然后当转化稳定时，进料被切换 至4,4'-MDA。 通过将进料转化为2,4'-MDA和4,4'-MDA的混合物，使活化的催化剂在线活化。 制备反式异构体含量为16〜24重量％的4,4'-H12MDA，并且还生产2,4'-H12MDA和4,4'-H12MDA的混合物，其中2,4 混合物中的-H12MDA为4〜15重量％。