Patent ID: 6476269
Filing Date: 2002-11-05
Classification: C07C

Abstract:
A method for producing xylylenediamine by hydrogenating phthalonitrile synthesized through ammoxidation of xylene, which method comprises:(1) an ammoxidation step for producing phthalonitrile by causing xylene to react in a vapor-solid catalytic manner with ammonia and an oxygen-containing gas, to thereby cause ammoxidation; (2) a trapping step for trapping phthalonitrile in an organic solvent (A) by bringing a gas produced through ammoxidation into direct contact with the organic solvent (A); and (3) a hydrogenation step for carrying out hydrogenation including adding liquid ammonia to phthalonitrile without separating the phthalonitrile trapped in the organic solvent (A).