申请人:Yoshimura Naritoshi
公开号:US20130197270A1
公开(公告)日:2013-08-01
A method for producing trans-1,4-bis(aminomethyl)cyclohexane includes a nuclear hydrogenation step of producing a hydrogenated terephthalic acid or terephthalic acid derivative by nuclear hydrogenation of a terephthalic acid or terephthalic acid derivative, the terephthalic acid or terephthalic acid derivative being at least one selected from the group consisting of terephthalic acid, terephthalic acid ester, and terephthalic acid amide; a cyanation step of treating the hydrogenated terephthalic acid or terephthalic acid derivative with ammonia, thereby producing 1,4-dicyanocyclohexane, and producing trans-1,4-dicyanocyclohexane from the obtained 1,4-dicyanocyclohexane; and an aminomethylation step of treating the trans-1,4-dicyanocyclohexane with hydrogen, thereby producing trans-1,4-bis(aminomethyl)cyclohexane.
Metal oxide is used as a catalyst in the cyanation step, and the obtained trans-1,4-dicyanocyclohexane has a metal content of 3000 ppm or less.
生产trans-1,4-双(氨甲基)环己烷的方法包括以下步骤:通过对苯二甲酸或苯二甲酸衍生物进行核氢化反应,生产氢化苯二甲酸或苯二甲酸衍生物,所述苯二甲酸或苯二甲酸衍生物至少选自苯二甲酸、苯二甲酸酯和苯二甲酸酰胺组成的群体;通过将氢化的苯二甲酸或苯二甲酸衍生物与氨处理,从而生产1,4-二氰基环己烷,并从获得的1,4-二氰基环己烷生产trans-1,4-二氰基环己烷;通过将trans-1,4-二氰基环己烷与氢处理,从而生产trans-1,4-双(氨甲基)环己烷。在氰化步骤中使用金属氧化物作为催化剂,获得的trans-1,4-二氰基环己烷金属含量不超过3000 ppm。