Peroxide compositions based on tungsten and phosphorus or...

C - Chemistry – Metallurgy – 01 – B

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23/1, 252/104, 2

C01B 15/047 (2006.01) C07D 301/12 (2006.01) C07F 9/54 (2006.01)

Patent

CA 1216134

ABSTRACT OF THE DISCLOSURE: This invention relates to compositions of formula (I): Q3XW4O24-2n (I) wherein: Q represents a cation of an "onium" salt; X is either a P or As atom, while n is a number chosen between 0;1 and 2. These compositions can be prepared by in reacting an oxygenated tungsten (VI) derivative, an oxygenated P (V) or As (V) derivative and hydrogen peroxide, in an aqueous acid phase, with a "onium" salt or a precursor thereof possibly contained in an organic phase unmixable with the aqueous phase, at substantially room temperature. The oxygenated compounds of W (VI), P (V) or As (V) may possibly be prepared 'in situ' under the conditions of the reaction. The compositions (I), which show up as solids or as viscous oils, find their use as oxidizing agents in general in oxidation processes, and especially as epoxydation catalysts for olefinic compounds, both in a homogeneous phase as well as in a heterogeneous phase, and preferably according to the phase-transfer technique, in the presence of oxidizing agents.

440771

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