Process for production of xylylenediamine and/or cyanobenzylamine
AssigneeMitsubishi Gas Chemical Company, Inc.
InventorsKazuhiko Amakawa, Takuji Shitara
Life of this patent
Estimating the term…
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.
Claims10
A process for producing xylylenediamine and/or cyanobenzylamine by a liquid-phase hydrogenation of a phthalonitrile compound in the presence of a catalyst, the liquid-phase hydrogenation being performed while controlling a concentration of a benzamide compound in a reaction solution to 0.35% by weight or lower, and wherein the hydrogenation is performed while further controlling a concentration of a benzoic acid compound in the reaction solution to 0.1% by weight or lower.
Dependencies are inferred from the claim text.