| abstract |
Provided is a 3-aminomethyl-3, 5, 5-trimethyl cyclohexylamine preparation method. The feeding flow of 3-cyano-3, 5, 5-trimethyl cyclohexylimine is reacted with NH3 and hydrogen in the presence of a hydrogenation catalyst; the method is characterized by: firstly adding a basic compound to the feeding flow of the 3-cyano-3, 5, 5-trimethyl cyclohexylimine, and then after a portion of the 3-cyano-3, 5, 5-trimethyl cyclohexylimine has reacted, adding an acidic compound to the reaction flow for further hydrogenation reaction to prepare the product. The method ensures that the aminonitrile content in the product is low, thus effectively reducing the duration of the reaction and greatly reducing the consumption of the catalyst during the hydrogenation reaction process. |