Catalytic Performance of Supported KNO3 Solid Bases for Methylation of Cyclopentadiene
作者： Linbing SUN , Zhengying WU , Jiahui KOU , Yuan CHUN , Ying WANG
DOI: 10.1016/S1872-2067(06)60039-9
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摘要: The catalytic performance of a series supported KNO3 solid bases for the synthesis methylcyclopentadiene via cyclopentadiene methylation with methanol was investigated. X-ray diffraction and N2 adsorption were applied to study characteristics different supports decomposition on them. base strength samples measured using Hammett indicator. A significant difference in oxides-supported observed. (H−) 27.0 detected ZrO2, γ-Al2O3, hydrotalcite (HT), MgO, which showed superbases, whereas only 9.3 examined SiO2- TiO2-supported KNO3. Such can be ascribed differences surface nature supports. suitable basicity is necessary catalyzing because small amounts molecules converted over catalysts low basicities, such as KNO3/SiO2 KNO3/TiO2 well most oxide However, acidity area also have certain effects reaction. conversion selectivity methylcyclopentadienes around 32% 86% KNO3/γ-Al2O3 KNO3/HT, respectively, at 450°C, higher than that MgO.
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