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研究了醇还原 VOPO4 · 2 H2 O制备的 VOHPO4 · 0 .5H2 O,在正丁烷和空气的混合气体中活化后 ,醇对产物物相组成的影响。由伯醇制备的 VOHPO4 · 0 .5H2 O活化后 ,产物中( VO) 2 P2 O7相的结晶度和含量较高 ;随着伯醇碳原子数的增加 ,活化后产物 ( VO) 2 P2 O7的无序度增加 ;仲醇制备的 VOHPO4 · 0 .5H2 O活化后 ,最终产物中 ( VO) 2 P2 O7的含量和结晶度较低 ,且有较多的无定型和 VOPO4 相生成。研究表明 ,正戊醇 (正辛醇 )制备的 VOHPO4 · 0 .5H2 O活化后 ,正丁烷的转化率和顺酐的选择性均优于仲戊醇 (仲辛醇 )和常规方法制备的 VOHPO4 · 0 .5H2 O
The effect of alcohols on the phase composition of the product after the activation of VOHPO4.0.5H2 O prepared from alcohol-reduced VOPO4.2H2O in a mixed gas of n-butane and air was studied. After the activation of VOHPO4.0.5H2O from the primary alcohol, the (VO) 2 P2 O7 phase in the product has a higher degree of crystallinity and higher content. With the increase of the number of carbon atoms in the primary alcohol, the product (VO) 2 P2 O7 (VO) 2 P2 O7 in the final product is lower and the degree of crystallinity is lower, and more amorphous and VOPO4 phases are formed. The results showed that the conversion of n-butane and the selectivity of maleic anhydride were better than those of n-pentanol (n-octanol) and VOHPO4 prepared by the conventional method after activation of VOHPO4.0.5H2O prepared from n-pentanol (n-octanol) · 0 .5H2O