A process for the integral production and reactive consumption of hydrogen peroxide combines oxidation of a high-boiling secondary alcohol to form hydrogen peroxide and the ketone analog, recycle of a hydrogenated ketone/alcohol stream to the oxidation step, and epoxidation of unsaturated fatty acid esters utilizing a gaseous hydrogen peroxide stream as it is produced. The epoxidized esters are known to have desirable characteristics for use as plasticizers and similar products.