Process for production of xylylenediamine and/or...

Details Process for production of xylylenediamine and/or... Process for production of xylylenediamine and/or...

2006-10-10

2006-10-10

Davis, Brian (Department: 1621)

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

Organic compounds

Amino nitrogen containing

C564S415000

Reexamination Certificate

active

07119230

ABSTRACT:
In the process of the present invention, xylylenediamine and/or cyanobenzylamine is produced by a catalytic liquid-phase hydrogenation of a phthalonitrile compound. The liquid-phase hydrogenation is performed by controlling the concentration of a benzamide compound to a specific level or lower. In a preferred embodiment, the concentration of a benzoic acid compound is further controlled to a specific level or lower. By the process, xylylenediamine and/or cyanobenzylamine is produced at high yields and the catalyst life is prolonged.

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Communication and European Search Report mailed Aug. 12, 2004, for No. EP 03 01 3772.

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