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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.
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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.
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