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    • 2. 发明申请
    • Process for the Preparation of Dinitriles
    • 制备二腈的方法
    • US20070260086A1
    • 2007-11-08
    • US10556629
    • 2004-05-07
    • Cecile RosierPhilippe LeconteDamien Bourgeois
    • Cecile RosierPhilippe LeconteDamien Bourgeois
    • C07C253/08
    • C07C253/10C07C253/34Y02P20/584C07C255/04
    • The present invention relates to a process for the preparation of dinitriles by hydrocyanation of unsaturated nitrile compounds in the presence of a catalyst based on a metal element in the zero oxidation state and on organophosphorus ligands;the invention relates more particularly to a process for the recovery from the hydrocyanation medium of a catalyst for the hydrocyanation of unsaturated nitrites to dinitriles. It consists in controlling the concentration of unsaturated nitrites in the reaction medium resulting from the hydrocyanation reaction in order to obtain a concentration by weight of unsaturated nitrites of less than 20% in the said medium, and in then feeding the said medium to a stage of settling into two upper and lower phases. The lower phase comprises most of the catalytic system, while the upper phase is composed essentially of the dinitriles.
    • 本发明涉及一种通过在基于零氧化态的金属元素和有机磷配体的催化剂存在下,通过不饱和腈化合物的氢氰化来制备二腈的方法;本发明更具体地涉及一种回收方法 来自用于将不饱和亚硝酸盐氢化成二腈的催化剂的氢化细胞培养基。 它包括控制由氢氰化反应产生的反应介质中的不饱和亚硝酸盐的浓度,以便在所述介质中获得小于20%的不饱和亚硝酸盐的重量浓度,然后将所述介质供给到 沉入两个上下相。 较低的相包含大部分催化体系,而上部相基本上由二腈组成。