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Formation of Methyl Acrylate from Methyl Acetate and Formaldehyde Condensation over Solid Base Catalysts

机译:用固体碱催化剂从乙酸甲酯和甲醛缩合的甲基丙烯酸甲酯形成

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The vapor-phase aldol condensation of methyl acetate (MeOAC) with formaldehyde (HCHO) to form methyl acrylate was investigated over solid base catalysts. A variety of solid base catalysts were prepared by loading Cs_2O over SiO_2 or Al_2O_3 as the support materials. The properties of the solid base catalysts were characterized by XRD, BET and CO_2-TPD. The results of the vapor-phase aldol condensation indicated that SiO_2 and Al_2O_3 modified with Cs_2O showed high conversation of methyl acetate and high selectivity of methyl acrylate. 22.6% conversation of methyl acetate and 16.5% yield of acrylic acid and methyl acrylate were obtained over Cs-Al_2O_3. In addition, Cs-SiO_2 exhibited about 42% selectivity to methyl acetate. The high yield of acrylic acid and methyl acrylate is attributed to the high base property of catalysts.
机译:研究了用固体碱催化剂研究与甲醛(HCHO)与甲醛(HCHO)形成甲基丙烯酸甲酯的气相醛醇缩合。通过将Cs_2O或Al_2O_3作为载体材料加载Cs_2O或Al_2O_3来制备各种固体碱催化剂。通过XRD,BET和CO_2-TPD表征固体碱催化剂的性质。气相醛醇缩合的结果表明,用CS_2O改性的SiO_2和Al_2O_3显示出高乙酸甲酯和丙烯酸甲酯的高选择性的高串联。通过Cs-Al_2O_3获得22.6%甲基甲酯的羟基甲酸甲酯和16.5%丙烯酸甲酯和丙烯酸甲酯。此外,CS-SiO_2对乙酸甲酯的选择性约42%。丙烯酸和丙烯酸甲酯的高产率归因于催化剂的高碱性性质。

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