杂多化合物催化性能的研究——Ⅲ.12-钼和12-钨系杂多酸催化的烷基苯与苯乙烯的烷基化反应 |
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引用本文: | 姚胜,叶兴凯,李丽丽,吴越. 杂多化合物催化性能的研究——Ⅲ.12-钼和12-钨系杂多酸催化的烷基苯与苯乙烯的烷基化反应[J]. 石油化工, 1990, 0(9) |
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作者姓名: | 姚胜 叶兴凯 李丽丽 吴越 |
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作者单位: | 中国科学院长春应用化学研究所 长春130022 |
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摘 要: | 研究了 Keggin 型结构的12-钼和12-钨系杂多酸催化的烷基苯与苯乙烯的烷基化反应。实验发现,在12-铝磷酸存在下,烷基苯的烷基化活性序列为:间二甲苯>邻二甲苯>1,3,5-三甲苯>甲苯>对二甲苯;Keggin 型结构的杂多酸的中心原子和配位原子对其催化活性有明显影响,其中,12-钼磷酸给出最好的催化活性和选择性。根据动力学试验,求得了反应温度为 40—80℃时的苯乙烯反应的表观活化能为78.3kJ/mol.
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Studies on Catalytic Properties of Heteropoly Compounds Ⅲ.Alkylation of Alkylbenzenes with Styrene Catalyzed by 12-Mo-and 12-W-Heteropoly Acids |
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Abstract: | The alkylation of alkylbenzenes with styrene catalyzed by soluble 12-Mo-and12-W-heteropoly acids of Keggin structure was investigated in the liquid phase.It was found that the order of reactivity of alkylbenzenes was as follows:m-xy-lene>0-xylene>1,3,5-trimethyl benzene>toluene>p-xylene.It was observedthat the central and coordination atoms of the heteropoly acids obviously affectthe catalytic activity of the alkylation of alkylbenzenes with styrene.Among the12-Mo-and 12-W-heteropoly acids examined,PMo_(12) gave the best catalytic activityand alkylation selectivity.Based on the kinetic experimental results of styrenewith o-xylene,an apparent activation energy of 78.3kJ/mol was obtained in thetemperature range of 40—80℃ |
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