Chemicals for use in industry; aluminium hydroxides; aluminium hydroxides for use as flame retardants; aluminium hydroxides as mineral filler; aluminium hydroxides for the manufacture of catalysts, catalytically active products and for use in catalyses; aluminium hydroxides as chemical additives for the manufacture of polymer compounds; aluminium hydroxides as chemical additives for the manufacture of stabilizers and stabilizer mixtures; boehmite; aluminium hydroxide oxide; boehmite for use as flame retardants; boehmite as mineral filler; boehmite as chemical additive for the manufacture of polymer compounds; boehmite as chemical additive for the manufacture of stabilizers and stabilizer mixtures; boehmite for the manufacture of catalysts, catalytically active products and for use in catalyses; aluminium oxides as mineral filler; aluminium oxides for the manufacture of catalysts, catalytically active, products and for use in catalyses; aluminium oxides as chemical additives for the manufacture of polymer compounds; aluminium oxides as chemical additives for the manufacture of stabilizers and stabilizer mixtures; aluminium oxides as fillers for the manufacture of plastic and rubber products; aluminium oxides as raw materials for the ceramic industry; aluminium oxides for the manufacture of technical ceramics and engineering ceramics; aluminium oxides for the manufacture of kitchen ware and sanitary ware as well as glazes; aluminium oxides for the manufacture of products for the automotive industry, refractory industry, electrical industry, construction industry and medical technology; aluminium oxides for the manufacture of polishing preparations; mixtures on the basis of aluminium oxides for the manufacture of refractory products, technical ceramics, casting compounds, concretes, mortars; ceramic materials for industrial purposes and as filtering materials; ceramic raw materials for the manufacture of products for the automotive industry, technical ceramics and engineering ceramics, and ballistic ceramics; ceramic materials as granules for the manufacture of products for the ceramic industry, technical ceramics and engineering ceramics, and ballistic ceramics; ceramic materials as raw materials for the ceramic industry; ceramic materials for the manufacture of technical ceramics and engineering ceramics; and ceramic materials for the manufacture of ballistic ceramics