Improved process for producing nickel(0)-phosphorus ligand...

Details Improved process for producing nickel(0)-phosphorus ligand... Improved process for producing nickel(0)-phosphorus ligand...

B - Operations, Transporting

01

J

B01J 31/24 (2006.01) B01J 31/18 (2006.01)

Patent

CA 2640958

Process for producing nickel(0)-phosphorus ligand complexes containing at least one nickel(0) central atom and at least one phosphorus-containing ligand, by reacting a nickel(II) compound with a reducing agent in the presence of the ligand to give a reaction mixture, characterized in that, a) in the reaction the molar ratio of reducing agent:nickel(II) compound is 1:1 to 1000:1, calculated as molar ratio of redox equivalents, b) in the reaction the molar ratio of phosphorus-containing ligand:nickel(II) compound is at most 30:1, calculated as molar ratio of P atoms:Ni atoms, c) in the resultant reaction mixture the nickel(0) content is at most 1.3% by weight, and d) the resultant reaction mixture is extracted by adding at least one dinitrile and at least one hydrocarbon, at least two immiscible phases forming.

L'invention concerne un procédé de fabrication de complexes nickel(0)-ligand phosphore contenant au moins un atome central de nickel(0) et au moins un ligand contenant du phosphore, par réaction d'un composé de nickel(II) avec un réducteur en présence du ligand pour former un mélange réactionnel, caractérisé en ce que a) lors de la réaction, le rapport molaire réducteur : composé de nickel(II) est compris entre 1 : 1 et 1 000 : 1, calculé en tant que le rapport molaire de l'équivalent rédox, b) lors de la réaction, le rapport molaire ligand contenant du phosphore : composé de nickel(II) est inférieur ou égal à 30 : 1, calculé en tant que rapport molaire atome P : atome Ni, c) dans le mélange réactionnel obtenu, la teneur en nickel(0) est inférieure ou égale à 1,3 % en poids, et d) le mélange réactionnel obtenu est extrait avec ajout d'au moins un dinitrile et d'au moins un hydrocarbure, au moins deux phases non miscibles se formant.

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