The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 21, 2014
Filed:
Oct. 05, 2011
Naritoshi Yoshimura, Funabashi, JP;
Shinji Kiyono, Kimitsu, JP;
Tetsuya Hamada, Ichihara, JP;
Eiji Watanabe, Chiba, JP;
Saiko Sawada, Chiba, JP;
Naritoshi Yoshimura, Funabashi, JP;
Shinji Kiyono, Kimitsu, JP;
Tetsuya Hamada, Ichihara, JP;
Eiji Watanabe, Chiba, JP;
Saiko Sawada, Chiba, JP;
Mitsui Chemicals, Inc., Tokyo, JP;
Abstract
A method for producing bis(aminomethyl)cyclohexanes includes a nuclear hydrogenation step of producing hydrogenated phthalic acids or phthalic acid derivatives by nuclear hydrogenation of phthalic acids or phthalic acid derivatives of at least one selected from the group consisting of phthalic acids, phthalic acid esters, and phthalic acid amides; a cyanation step of treating the hydrogenated phthalic acids or phthalic acid derivatives obtained in the nuclear hydrogenation step with ammonia, thereby producing dicyanocyclohexanes; and an aminomethylation step of treating the dicyanocyclohexanes obtained in the cyanation step with hydrogen, thereby producing bis(aminomethyl)cyclohexanes. In the cyanation step, metal oxide is used as a catalyst, and the obtained dicyanocyclohexanes have a metal content of 3000 ppm or less.