ZIRCONIUM, TITANIUM AND MANGANESE MIXED OXIDES CATALYSTS FOR DEHYDROGENATION OF ETHYLBENZENE INTO STYRENE, PROCESS THEREOF AND PREPARATION METHOD FOR STYRENE MONOMER EMPLOYING THEM

摘要

Catalysts, comprising zirconium oxide, titanium oxide and manganese oxide, for dehydrogenation of ethylbenzene into styrene, which can obtain catalyst performance highly efficiently by a process that can exclude use of vapor, and that is environmentally friendly and economically beneficial by using CO2 in the reaction, preparation processes of the catalysts, and a production method of styrene monomer using the catalysts are provided. A composite oxide catalyst for dehydrogenation of ethylbenzene into styrene comprises zirconium oxide, titanium oxide and manganese oxide. The composite oxide catalyst comprises 10 to 60 mole% of zirconium oxide, 10 to 40 mole% of titanium oxide and the balance of manganese oxide. The composite oxide catalyst further comprises 1 to 10 wt.% of at least one selected from potassium carbonate and potassium oxide. A preparation process of a composite oxide catalyst for dehydrogenation of ethylbenzene into styrene comprises the steps of: dissolving a zirconium salt, a titanium salt and a manganese salt into a deionized water to prepare a solution, and forming a composite metal hydroxide precipitate; and filtering and drying the metal hydroxide precipitate at a reduced pressure, and firing the dried metal hydroxide precipitate.