Process for treating reaction mixtures by chemical reduction

The process for treating the product mixture containing an alcohol from the epoxidation of an olefinic hydrocarbon having 2 to 30 carbon atoms with an organic hydroperoxide having the formula ROOH where R is an alkyl, cycloalkyl or carbocyclic aralkyl having 3 to 20 carbon atoms at a temperature of -20.degree. to 200.degree.C in the presence of a titanium, vanadium, chromium, selenium, zirconium, columbium, molybdenum, tellurium, tantalum, tungsten, rhenium, or uranium catalyst, in order to reduce the acidic catalyst characteristics of said product mixture at least to the extent that the rate of dehydration of alcohol contained therein is less than 50% per hour at 140.degree.C which comprises the step of reacting said product mixture at a temperature of 0.degree. to 150.degree.C with a chemical reducing agent which is sodium bisulfite, a ferrous salt, ascorbic acid, hydroquinone or the iodide ion.