二氧化硅负载磷钨钼酸催化合成环己酮1,2-丙二醇缩酮

以二氧化硅负载磷钨钼酸（H_3PW_6Mo_6O_（40）/SiO_2）为催化剂,环己酮和1,2-丙二醇为原料合成环己酮1,2-丙二醇缩酮。探讨了H_3PW_6Mo_6O_（40）/SiO_2对缩酮反应的催化活性,研究了酮醇物质的量比、催化剂用量、反应时间等因素对产物收率的影响。实验结果表明：H_3PW_6Mo_6O_（40）/SiO_2是合成环己酮1,2-丙二醇缩酮的良好催化剂。在固定环己酮用量为0.20mol的情况下,n（环己酮）：n（1,2-丙二醇）=1.0：1.3,催化剂用量占反应物料总质量的0.8%,带水剂环己烷的用量为12mL,反应时间45min的条件下,产品收率可达83.95%。

Catalytic synthesis of cyclohexanone 1,2-propanediol ketal with Ha PW6Mo6O40/SiO2

Cyclohexanone 1,2-propanediol ketal was synthesized from cyclohexanone and 1,2-propanediol using H₃PW₆ Mo₆O₄₀/SiO₂ as catalyst.The effect of different reaction parameters,such as mole ratio of cyclohexanone to 1,2-propanediol,catalyst dosage and reaction time on the yield of cyclohexanone 1,2-propanediol ketal were discussed and the best reaction conditions were found out.Experimental results showed that H₃ PW₆ Mo₆ O₄₀ / SiO₂ was an excellent catalyst.The optimum conditions are:molar ratio of cyclohexanone to 1,2-propanediol is 1.0:1.3,the quantity of catalyst is equal to 0.8%of feed stocks,the volume of cyclohexane as the water-carrying agent is 12mL,and the reaction time is 45min,its yield can be up to 83.95%.