Comprehensive studies of physicochemical properties, including textural and morphological, of iron-containing waste from the landfill of the Zavolzhsky Chemical Plant (Ivanovo region, Russia) were carried out. The data on changes in elemental and phase composition of red mud depending on the depth of occurrence and time of storage at the landfill were obtained. Methods of primary treatment of iron-containing wastes of Zavolzhsky Chemical Plant to obtain iron-containing intermediates for synthesis of catalysts were proposed. Morphology and distribution of elements on the surface of red mud after its thermal treatment at different temperatures, as well as porosity of iron-containing wastes after their thermal treatment in air oxygen environment were studied. The use of iron-containing wastes from Zavolzhsky Chemical Plant as a semi-product of iron-containing catalysts and chemisorbents for deep processing of process gases is recommended.