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US 4,686,010 AGranted
Process for the production of non-aqueous hydrogen peroxide solutions and their use
AssigneeDegussa AG
InventorsKarlheinz Drauz, Axel Kleemann
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AssigneeDegussa AG
InventorsKarlheinz Drauz, Axel Kleemann
Estimating the term…
The production of solutions of hydrogen peroxide in phenol or its derivatives, e.g. hydrocarbyl substituted phenols, halo substituted phenols or phenol ethers, is carried out in a single step. Practically no loss of hydrogen peroxide occurs since a total distillation of hydrogen peroxide together with phenol or phenol derivative is avoided. Simultaneously the solutions obtained are practically free from water. The mixture of phenol or phenol derivative and aqueous hydrogen peroxide is treated with a material that boils below the boiling point of hydrogen peroxide, phenol or phenol derivative or forms an azeotrope with water that boils below the boiling point of hydrogen peroxide, phenol or phenol derivative and the water removed as an azeotrope. The solution of hydrogen peroxide in phenol or phenol derivative which remains behind is suitable for carrying out oxidation reactions and above all, also for hydroxylation reactions.
A process for the production of a substantially water-free solution of hydrogen peroxide in a member of the group consisting of phenol per se, an alkyl phenol, an aryl phenol, a halophenol and a phenyl alkyl ether, which comprises mixing (1) the member and (2) aqueous hydrogen peroxide with a solvent or mixture of solvents whose boiling point is below that of hydrogen peroxide and the member at normal pressure, which solvent forms a homogeneous solution with both (1) and (2) and only forms an azeotrope with water whose boiling point is below that of hydrogen peroxide and the said member, which solvent is inert of hydrogen peroxide and the member and is separated from the solution formed of hydrogen peroxide in the said member, and distilling off an azeotrope of the solvent and water leaving behind a substantially water-free solution of hydrogen peroxide in the said member.
Dependencies are inferred from the claim text.