To meet the increasing demand for methyl methacrylate, a series of Fe modified Cs–P/γ-Al₂O₃ catalysts were developed through the impregnation method and tested for the aldol condensation of methyl propionate with formaldehyde in a fixed-bed reactor. Through various characterization studies, the physicochemical properties of the catalysts were systematically studied, especially the relationship between the number of the acid sites and catalytic activity. The number of medium acid sites was increased effectively by the addition of Fe, and the catalytic selectivity was improved consequently. Moreover, the reaction conditions were also optimized, and the life span of the optimized catalyst was evaluated. The Cs–P–0.1Fe/γ-Al₂O₃ showed excellent reusability during a 260 h lifetime experiment.

中文翻译：

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的Fe-Cs的改性-P /γ-Al系₂ ö ₃催化剂的甲基丙烯酸甲酯的合成由丙酸甲酯和甲醛

为了满足对甲基丙烯酸甲酯的需求不断增加，一系列的Fe改性铯P /γ-Al系_2个ö ₃催化剂通过浸渍法开发和丙酸甲酯在一个固定床反应器中甲醛的醛醇缩合测试。通过各种表征研究，系统地研究了催化剂的理化性质，特别是酸位点数与催化活性之间的关系。通过添加Fe有效地增加了中等酸性位点的数量，因此提高了催化选择性。此外，还优化了反应条件，并评估了优化催化剂的寿命。在CS-P-0.1Fe /γ-Al系₂ ö ₃ 在260小时的使用寿命实验中显示出出色的可重用性。