Use of mixtures of titanium dioxides, catalyst for preparing phthalic anhydride, catalyst system and process for preparing phthalic anhydride by oxidation in gas phase xylene, naphthalene or mixtures thereof in a reactor of the type shell and tube

摘要

Use of mixtures of titanium dioxides, catalyst for preparing phthalic anhydride, catalyst system and process to prepare etu00e1lico anhydride by oxidation in the gas phase xylene, naphthalene or mixtures thereof in a reactor of the type shell and tube.The invention relates to the use of mixtures of diu00e1xidos of titanium in the form of anatase, having physical properties defined for the production of catalysts, which are particularly suitable for the synthesis of phthalic anhydride. The invention relates to a catalyst containing titanium dioxide in the form of anatase, having physical properties defined.