采用硅胶负载Keggin型H6PM09V3O40催化水杨醛与硝酸反应合成5-硝基水杨醛,考察了催化剂负载量、反应时间、反应温度、催化剂用量、硝酸用量和溶剂对反应的影响及催化剂的重复使用性能.实验结果表明,m(水杨醛)∶m(质量分数65％硝酸)∶m(负载量20％ H6 PM09 V3 O40/SiO2)=2.44∶3.00∶3.00,用石油醚作为溶剂,45℃反应2.5h,水杨醛的转化率为98％,5-硝基水杨醛的选择性为96.8％.催化剂回收容易,重复使用5次后,活性基本不变.
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