Copper ores may contain not only sulfide minerals, but also a certain amount of oxidized minerals such as malachite, azurite, euprite, etc. The problem of beneflciation of oxidized minerals by flotation is an important one, because their complete extraction together with sulfides enables one to increase greatly the total extraction of copper [1].Malachite and azurite lend themselves reasonably well to flotation after sulfidization with use of sulfhydryl collectors [2]. Flotation without sulfidization is possible if high-molecular-weight xanthates or certain other reagents are used. However, this method has not been used in Soviet plants owing to the absence of such collectors.The results of laboratory research by certain authors, and experience obtained in foreign beneficiation plants, indicate that dixanthides are effective agents for flotation of sulfide ores. However, their flotation effect has not been closely investigated; this probably explains why they are little used for flotation of ores.