Oxidation of secondary alcohols

A reactor for the oxidation of a secondary alcohol to hydrogen peroxide comprised of a central cylindrical reaction zone and an annular reaction zone surrounding the central zone, the zones being separated by a cylindrical baffle, said baffle having holes adjacent the lower end to permit liquid flow from the annular zone to the cylindrical zone, a common vapor space above the central and annular reaction zones, means for introducing liquid recycle and reactant streams to the annular reaction zone, means for withdrawing liquid reaction mixture from the central reaction zone, and means for withdrawing vapor from the common vapor space above the central and annular reaction zones.