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| Characterization of SO2-4/Al2O3 catalyst and its catalytic activity in epoxidation |
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| DOI： |
| KeyWord:castor oil epoxidation SO2-4/Al2O3 catalyst characterization |
| FundProject:宁夏高等学校科学技术研究项目（NGY2017157） |
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| Abstract: |
| Solid superacid SO2-4/Al2O3 was prepared by impregnation method at different calcination temperatures. The surface properties and crystalline forms of solid superacid were characterized by Fourier transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), ammonia temperature programmed desorption (NH3-TPD) and nitrogen physical adsorption (N2-BET),and the epoxidation of castor oil was catalyzed by the solid superacid. The results showed that under the conditions of mass of castor seed oil 20 g, catalyst dosage 2 g, calcination temperature 600 ℃, hydrogen peroxide droplet addition temperature 40 ℃,reaction temperature 55 ℃ and reaction time 8 h,the iodine value and epoxy value of epoxidized castor oil could reach 48.4 gI/100 g and 0.551%, respectively. |
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