Method of producing xylylenediamine

Details Method of producing xylylenediamine Method of producing xylylenediamine

2007-05-17

2008-12-16

Davis, Brian J (Department: 1621)

Organic compounds -- part of the class 532-570 series

Organic compounds

Amino nitrogen containing

Reexamination Certificate

active

07465832

ABSTRACT:
A method of producing xylylenediamine of the present invention includes the steps of: 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; removing the liquid ammonia in the reaction product (A) to obtain a reaction product (B); subjecting the reaction product (B) to a second catalytic hydrogenation treatment, thereby hydrogenating cyanobenzylamine to obtain a reaction product (C); and distilling the reaction product (C) to purify xylylenediamine.

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European Search Report issued Jun. 2, 2008, for Application No. EP 07108328.1-1211.

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