发明名称 |
DINITRILE PREPARATION METHOD |
摘要 |
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. |
申请公布号 |
WO2004101497(A2) |
申请公布日期 |
2004.11.25 |
申请号 |
WO2004FR01108 |
申请日期 |
2004.05.07 |
申请人 |
RHODIA POLYAMIDE INTERMEDIATES;ROSIER, CECILE;LECONTE, PHILIPPE;BOURGEOIS, DAMIEN |
发明人 |
ROSIER, CECILE;LECONTE, PHILIPPE;BOURGEOIS, DAMIEN |
分类号 |
C07C253/10;C07C253/34;C07C255/04 |
主分类号 |
C07C253/10 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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