Catalytic Oxidation Of Tetralin To Tetralone Over Co/MIL-53（Al） And Co₃O₄ Templated By Ageratina Adenophora Leaves

Tetralone is an important chemical intermediate, which is derived from the oxidation of tetralin. However, the industry syntheses of tetralone always pollution to the environment because of the use of chromium salts as catalysts. Heterogeneous catalysts which could be operated environmental friendly are therefore become to research focus. In this paper, Co/MIL-53(Al) and Co3O4 Templated by Ageratina adenophora Leaves were synthesized and used as catalysts for oxidation of tetralin for the first time.MIL-53(Al) were synthesized by solvothermal method and then doped with Co through a dipping process. The obtained samples were characterized by Powder X-ray diffraction (PXRD), N2 adsorption/desorption measurement, Scanning electron microscopy (SEM), Fourier transform infrared spectroscopy (FT-IR) and Thermogravimetric differential thermal analysis (TG-DTA). Co3O4 with special morphology were synthesized by using Ageratina adenophora, a biological invader for China as template. The obtained samples were characterized by Powder X-ray diffraction (PXRD), N2 adsorption/desorption measurement, Scanning electron microscopy (SEM).The obtained materials were used as catalysts for oxidation of tetralin. The effects of amount and kind of catalyst used, the solvent, oxidant, reaction temperature and reaction time on the productivity were investigated. When using Co/MIL-53(Al) (60 mg) as catalyst, acetic anhydride as solvent (16 mL), hydrogen peroxide as oxidant (8 mL), reaction temperature 100℃ and reaction time 12h, the conversion of tetralin was 74% with the selectivity of 100% toward tetralone; When using Co3O4 Templated by Ageratina adenophora Leaves (30 mg) as catalyst, acetic acid as solvent (20 mL), hydrogen peroxide as oxidant, reaction temperature 120℃ and reaction time 8h, the 93% tetralin conversion and 98% selectivity for tetralone were chieved.