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有机化学
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有机化学 ›› 2003, Vol. 23 ›› Issue (11): 1294-1298. 上一篇    下一篇

研究论文

环境友好催化剂TiSiW_(12)O_(40j)/TiO_2的制备及其催化性能研究

杨水金;梁永光;孙聚堂   

  1. 武汉大学化学与分子科学学院
  • 发布日期:2003-11-25

Preparation and Catalytic Activity of TiSiW_(12)O_(40j)/TiO_2 in Synthesis of Butyric Esters

Yang Shuijin;Liang Yongguang;Sun Jutang   

  1. College of Chemistry and Molecular Sciences, Wuhan University
  • Published:2003-11-25

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590

被引次数

13

制备了新型固载杂多酸盐TiSiW_(12)O_(40)/TiO_2环境友好催化剂，并以丁酸 丁酯的合成作为探针反应，系统考察了原料H_4SiW_(12)O_(40)·xH_2O与TiO_2摩 尔比、焙烧温度、焙烧时间等制备条件对TiSiW_(12)O_(40)/TiO_2催化活性的影响 。实验表明：制备催化剂的适宜条件为原料H_4SiW_(12)O_(40)·xH_2O与TiO_2摩 尔比为0.47，焙烧温度为350 ℃，焙烧时间为3.0 h。利用该条件下制备的催化剂 TiSiW_(12)O_(40)/TiO_2合成了丁酸丁酯正丁醇与正丁醇的投料摩尔比n(醇):n(酸 ) = 1.3:1，催化剂的用量占反应物总投料质量的1.3%，反应时间为1 h，丁酸丁酯 的产率为97.2%。该催化剂TiSiW_(12)O_(40)/TiO_2用于制备其它丁酸酯类（如乙 酯、丙酯、戊酯、异戊酯）时同样取得了好的结果。

关键词: 硅酸盐;钨酸盐;钛化合物;氧化钛;丁酸酯;酯化;催化活性, 焙烧;丁醇

A new environmentally friendly catalyst, TiSiW_(12)O_(40)/TiO_2 was prepared. Its catalytic activity in esterification of n-butanoic acid and re-butyl alcohol was measured and compared with that of H_3PW_(12) O_(40) or H_2SO_4. TiSiW_(12)O_(40)/TiO_2 showed better catalytic activity than H_3PW_(12)O_(40) or H_2SO_4. The optimum reaction condition was that the molar ratio of alcohol to acid was 1.3:1, the mass ratio of the catalyst used to the reactants was 1.3%, and the reaction time was 1 h. Under these conditions, the yield of ethyl ester is 87%, propyl ester 93% , rc.-butyl ester 97.2%, n-amyl ester 98% , and iso-amyl ester 95% , respectively.

Key words: SILICATE;TUNGSTATE;TITANIUM COMPOUNDS;TITANIUM OXIDE, butyric ester;ESTERIFICATION;CATALYTIC ACTIVITY;ROASTING;BUTANOL

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