Preparation of substituted aromatic amines

Details Preparation of substituted aromatic amines Preparation of substituted aromatic amines

C - Chemistry, Metallurgy

07

C

C07C 255/58 (2006.01) C01C 3/12 (2006.01) C07C 209/60 (2006.01) C07C 211/54 (2006.01) C07C 213/08 (2006.01) C07C 217/92 (2006.01) C07C 227/18 (2006.01) C07C 229/54 (2006.01) C07C 231/12 (2006.01) C07C 237/30 (2006.01) C07C 253/30 (2006.01) C07C 211/55 (2006.01)

Patent

CA 2250850

A method for producing aromatic amines such as N-phenyl-p-phenylenediamine is disclosed wherein an amine substituted aromatic such as aniline is oxidized with oxygen or hydrogen peroxide in the presence of a preferred trisodium pentacyano ferrate(II) complex containing various water soluble ligands, such as ammonia, mono alkyl amine, dialkyl amines, and trialkyl amines. The complex is subsequently catalytically reduced by hydrogenation using certain heterogeneous metal catalysts to yield the desired aromatic amine.

La présente invention a pour objet un procédé de préparation d'amines aromatiques, telles que la N-phényl-p-phénylènediamine, dans lequel une amine aromatique substituée telle que l'aniline est oxydée avec de l'oxygène ou du peroxyde d'hydrogène en présence d'un complexe préféré de pentacyano ferrate (II) trisodique contenant divers ligands solubles dans l'eau, tels que ammoniaque, monoalkylamine, dialkylamines, et trialkylamines. Le complexe est ensuite réduit par hydrogénation catalytique au moyen de certains catalyseurs métalliques hétérogènes, ce qui permet d'obtenir l'amine aromatique désirée.

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