Canadian Patents & Development Ltd.

Solavchem Enterprises Inc.

Clarke E Slemon

R D Stevens

Stephen R Cater

The present invention relates to a photochemical process for the manufacture of hydrogen peroxide

Photochemical production of hydrogen peroxide

Photochemical conversion of tachysterols to previtamins is conducted in the presence of a polymeric photosensitizer which has the appropriate chromophore groups, e.g. anthracene groups, attached to a medium or high molecular weight, substantially uncrosslinked polymer backbone. The polymeric photosensitizer is soluble in solvents normally used for conducting the photochemical reaction (diethyl ether, dioxane, THF, t.butyl methyl ether) but insoluble in lower alcohols and hydrocarbons, so that it may be readily and simply recovered from the product mixture by use of such non-solvents.

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Willowdale, Canada

Clarke E Slemon