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二氧化硅负载磷钨杂多酸催化合成环己酮乙二醇缩酮

Catalytic Synthesis of Cyclohexanone Ethylene Ketal with H₃PW₁₂O₄₀/SiO₂

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【Author】 Yang Shuijin,Wang Min,Yang Xiaosan(Department of Chemistry and Environmental Engineering,Hubei Key Laboratory of Bioanalytical Technique,Hubei Normal University,Huangshi 435002,China)

【机构】湖北师范学院化学与环境工程系生化分析技术湖北省重点实验室；湖北师范学院化学与环境工程系生化分析技术湖北省重点实验室湖北黄石435002；湖北黄石435002；

【摘要】采用浸渍制备了二氧化硅负载磷钨杂多酸催化剂。以环己酮和乙二醇为原料合成环己酮乙二醇缩酮,探讨了二氧化硅负载磷钨杂多酸催化剂对缩酮反应的催化活性,较系统地研究了原料量比、催化剂用量和反应时间诸因素对产品收率的影响。实验表明,二氧化硅负载磷钨杂多酸是合成环己酮乙二醇缩酮的良好催化剂,在n(环己酮)∶n(乙二醇)=1∶1.4,催化剂用量为反应物料总质量的0.4%,带水剂环己烷的用量为8ml和反应时间1.0h的优化条件下,环己酮乙二醇缩酮的收率可达87.3%。更多还原

【Abstract】 A new environmental friendly catalyst,H3PW12O40/SiO2 was prepared.Cyclohexanone ethylene ketal was synthesized from cyclohexanone and glycol in the presence of H3PW12O40/SiO2.Factors influencing the product yield were discussed and best reaction conditions were found.Experimental results showed that H3PW12O40/SiO2 was an excellent catalyst.With n(cyclohexanone)∶n(glycol)=1.0∶1.4,w(H3PW12O40/SiO2)=0.4%,reaction time=1.0 h,and dried cyclohexane 8 ml,yield of cyclohexanone ethylene ketal can reach 87.3%.更多还原