环氧丙烷异构化制丙醛催化剂的研究

Investigations of Catalysts for the Isomerization of Propylene Oxide

采用微反-色谱联合装置对环氧丙烷开环异构化反应中催化剂的初活性进行了评选。其中有如Al2(SO4)3/K2SO4(质量比15∶85)混合型催化剂在275℃时,环氧丙烷转化率达到97.60%,丙醛选择性达到94.57%;Al2(SO4)3/γ-Al2O3(质量比60∶40)混合型催化剂在275℃时,转化率达83.37%,选择性达到100%;硅钨酸催化剂也有比较好的催化效果,且解决了成型问题;另外还研究了反应温度以及催化剂活化方法对催化性能的影响。

The initial activity of catalyst in isomerization reaction of propylene oxide have been evaluated with microreactorchromatograph. At 275℃, with Al2(SO4)3/K2SO4 mixed catalyst, which the mass ratio was 15:85, the conversion ratio of propylene oxid could be as high as 97.60%, and the selectivity of propionaldehyde was 94.57%; while with Al2(SO4)3γAl2O3 which the mass ratio was 60:40,the conversion ratio was 83.37%, and the selectivity was 100% at 275℃. The moulding problem of WO3/SiO2 was solved, which have good catalytic effect. The properties of catalyst were also discussed under the influence of reaction temperature and way of activatio of catalyst.