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RESEARCH PRODUCT

Anthraquinones formation on zeolites with BEA structure

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Publisher Summary Zeolites with BEA structure are in focus mainly in the field of conversion of hydrocarbons. However, their unique physico-chemical properties let to suppose that these systems can be successfully used in reactions of organic synthesis. Such zeolites can be used as catalysts for the synthesis of large organic molecules. The interaction of phthalic anhydride with aromatic hydrocarbons is a subject for investigation, both for science purposes and for industrial applications. The use of zeolites in this reaction is an example of the acylation of aromatics on solid-acid catalysts; on the other hand, such a study creates the possibilities of developing more appropriate technology for the production of anthraquinone compounds. This chapter presents experimental material on the investigation of catalytic properties of zeolites with BEA structure in anthraquinones formation. The chapter presents a study of the interaction of both initial reagents and reaction products with acid sites of zeolite using IR technique. On the base of the obtained data, a mechanism of formation of reaction products was proposed. The catalytic properties of zeolite with BEA structure were examined in the reaction in the range of 225–500°C. Increasing the reaction temperature can cause the decomposition of not only anthraquinone molecules but also of phthalic anhydride and benzoylbenzoic acid, which can lose CO and CO2 giving benzophenone, biphenyl, and 9-fluorenone as reaction products.