公开(公告)号：EP1633700B1

公开(公告)日：2012-04-25

申请号：EP04742667.1

申请日：2004-05-07

Applicant: Invista Technologies S.à.r.l.

Inventor： ROSIER, Cécile ,  LECONTE, Philippe ,  BOURGEOIS, Damien

IPC: C07C255/04 ,  C07C253/34 ,  C07C253/10

CPC classification number: C07C253/10 ,  C07C253/34 ,  Y02P20/584 ,  C07C255/04

Abstract: The invention relates to a method of preparing dinitriles, involving hydrocyanation of unsaturated nitrile compounds in the presence of a catalyst based on metallic elements in zero oxidation state and organophosphorous ligands. More specifically, the invention relates to a method of recovering a catalyst for the hydrocyanation of unsaturated nitriles into dinitriles from the hydrocyanation medium. The inventive method consists in: controlling the concentration of unsaturated nitriles in the reaction medium originating from the hydrocyanation reaction, in order to obtain a weight concentration of unsaturated nitriles of less than 20 % in said medium; and supplying the aforementioned medium in a decantation step in two phases, namely an upper and lower phase. The lower phase comprises the majority of the catalytic system, while the upper phase essentially comprises the nitriles.

公开(公告)号：EP1592659B1

公开(公告)日：2009-07-22

申请号：EP04704260.1

申请日：2004-01-22

Applicant: Invista Technologies S.à.r.l.

Inventor： ROSIER, Cécile ,  KABIR, Hocine ,  MARION, Philippe

IPC: C07C253/10 ,  C07C253/34

CPC classification number: C07C253/10 ,  C07C255/04

Abstract: The invention relates to a method of producing compounds comprising two nitrile functions. More specifically, the invention relates to a method of producing dinitrile compounds from compounds comprising a nitrile function and an ethylenic unsaturation, in the presence of a catalytic system containing an organometallic complex and a Lewis acid-type cocatalyst. The inventive method comprises a step involving treatment of the reaction medium resulting from hydrocyanation, enabling the metallic element to be extracted and recovered from the Lewis acid.