TiSiW_(12)O_(40)/TiO_2催化合成丁酮1,2-丙二醇缩酮

Synthesis of Butanone 1,2-Propanediol Ketal over TiSiW_(12)O_(40)/TiO_2 Catalyst

报道了以固载杂多酸盐TiSiW12O40/TiO2为多相催化剂,通过丁酮和1,2-丙二醇反应合成了丁酮1,2-丙二醇缩酮,探讨了TiSiW12O40/TiO2对缩酮反应的催化活性,较系统地研究了酮醇物质的量比,催化剂用量,反应时间诸因素对产品收率的影响。实验表明:TiSiW12O40/TiO2是合成丁酮1,2-丙二醇缩酮的良好催化剂,在n(酮)∶n(醇)=1∶2.0,催化剂用量为反应物料总质量的0.3%,反应温度为82～110°C,环己烷为带水剂,反应时间2.0h的优化条件下,丁酮1,2-丙二醇缩酮的收率可达91.3%。

Butanone 1,2propanediol ketal was synthesized from butanone and 1,2propanediol in the presence of TiSiW12O40/TiO2 catalyst. The factors influencing the synthesis were investigated. The optimum conditions obtained molar ratio of butanone to 1,2propanediol, 1∶2.0; quantity of catalyst, 0.3% of the feed stock; reaction temperature, 82~110°C; and reaction time, 2.0 h. TiSiW12O40/TiO2 is an excellent catalyst for synthstizing butanone 1,2propanediol ketal and the product yield can reach over 91.3%.