纳米SO42-/SnO2固体超强酸催化合成环己酮1,2-丙二醇缩酮

报道了以SnCl₄·5H₂O为原料和十六烷基三甲基溴化铵为模板剂，采用模板法合成纳米SO₄^2-/SnO₂固体超强酸催化剂。用XRD和TG-DTA进行了表征，以环己酮和1,2-丙二醇的缩合反应为探针反应，探讨了SO₄^2-/SnO₂固体超强酸的催化活性，较系统地研究了焙烧温度、反应时间、酮醇物质的量比、带水剂的用量和催化剂的用量等对反应的影响以及催化剂的稳定性。结果表明，SO₄^2-/SnO₂固体超强酸催化剂具有纳米大小，在环己酮1,2-丙二醇缩酮的合成具有良好的催化活性和稳定性。在最佳条件下，缩酮的产率可达97.2%，纯度（质量分数）为99.2%。

Synthesis of cyclohexanone 1,2-propanediol ketal catalyzed by nanoparticle SO4^2-/SnO2 solid superacid

Nanoparticle SO₄^2-/SnO₂ solid superacid was synthesized using SnCl₄·5H₂O and cetyltrimethyl ammonium bromide（CTAB）as the template, and characterized by XRD and TG-DTA. Cyclohexanone 1,2-propanediol ketal was synthesized from cyclohexanone and 1,2-propanediol over the catalyst. The influence of catalyst calcination temperature, reaction time， mole ratio of reactants, quantity of water-carrying agent and catalyst dosage were investigated. The results showed that SO₄^2-/SnO₂ solid superacid catalyst, with nanoparticle size, exhibited excellent activity and stability in the synthesis of cyclohexanone 1,2-propanediol ketal, with yield of 97.2% and cyclohexanone 1,3-propanediol ketal purity of 99.2% under the optimum condition.