【摘要】 实验以钼酸钠,硅酸钠为原料合成母体酸,以六氢吡啶为有机配体合成有机/无机电荷转移配合物[(CH2)5NH2]4Si Mo12O40。将合成的[(CH2)5NH2]4Si Mo12O40杂多酸哌啶盐应用于苯甲醛氧化合成苯甲酸反应,考察了催化剂用量、氧化剂30%H2O2的用量、反应温度、反应时间等对苯甲酸收率的影响。最佳工艺条件为:n(催化剂)∶n(苯甲醛)=0.003∶1,n(H2O2)∶n(苯甲醛)=7.2∶1,反应温度80℃,反应时间2.5h。苯甲酸收率达85%以上。更多还原

【Abstract】 The organic-inorganic hybrid catalyst [(CH2)5NH2]4SiMo12O40 was prepared by matrix acid and piperidine as organic ligand.The matrix acid was synthesized by sodium molybdate and sodium silicate.The composition and structure of the catalyst were characterized by FT-IR,XRD,TG-DTA and elemental analysis.The results indicated that the heteropoly anions still reserved their Keggin structure in the compound.Its catalytic performance was evaluated in the oxidation of benzaldehyde to benzoic acid.The optimal reaction conditions were found as follows: n(catalyst)∶n(benzaldehyde)=0.003∶1;n(H2O2)∶n(benzaldehyde)=7.2∶1;reaction temperature 80 ℃ and reaction time 2.5 h.The yield of benzoic acid was above 85%.更多还原