紫外分光光度法在固载杂多酸催化剂溶脱量测定中的应用

The application of UV spectrophotometry in mensuration of quantity shedding from solid heteropoly acid catalyst

采用紫外分光光度法测定了乙酸乙酯催化体系中磷钨酸阴离子的含量。结果表明,6次反应后杂多酸基本上不再从载体上脱落下来,这与实验结果完全相符。这就充分说明采用紫外分光光度法能够较好地测定该反应体系中固载杂多酸催化剂中杂多酸的溶脱程度。

In this paper, phosphotungstic acid anion was determinated by UV spectrophotometer in ethyl acetate catalyst system. The results showed that,heteropolyacid is basically no longer shedding down from the vector after six reactions. This is completely consistent with the experimental results. This fully shows that UV spectrophotometry can better measure the quantity shedding from of heteropolyacid on supported heteropolyacid catalyst in the esterification reaction system.