Patent ID: 7465832

Claim:
A method of producing xylylenediamine, comprising the steps of: (1) subjecting a liquid mixture of phthalonitriles with liquid ammonia or a mixture of liquid ammonia and an organic solvent to a first catalytic hydrogenation treatment, thereby hydrogenating the phthalonitriles to obtain a reaction product (A), wherein a content of the liquid ammonia or the mixture of liquid ammonia and an organic solvent is 80 wt % or more; (2) removing the liquid ammonia in the reaction product (A) to obtain a reaction product (B); (3) subjecting the reaction product (B) to a second catalytic hydrogenation treatment, thereby hydrogenating cyanobenzylamine to obtain a reaction product (C); and (4) distilling the reaction product (C) to purify xylylenediamine.