Process for the preparation of a 1,2-dioxime

Details Process for the preparation of a 1,2-dioxime Process for the preparation of a 1,2-dioxime

C - Chemistry, Metallurgy

22

B

260/591.7

C22B 3/30 (2006.01) C01G 3/00 (2006.01)

Patent

CA 1138474

A B S T R A C T A process is disclosed for the preparation of a 1,2-dioxime of the general formula: Image (I) wherein A represents an aromatic group and R a hydrocarbyl group or a hydrogen atom, which process comprises the oximation of a hydroxyiminoketone of the general formula: Image (II) wherein A and R have the same meaning as in the general formula I and X and Y are different and represent an oxygen atom or a hydro- xyimino group, in the presence of a nickel compound forming a complex with the 1,2-dioxime of the general formula I. The 1,2- dioximes are useful as copper- and nickel- extractants.

321299

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