用超临界流体干燥法制备了超细粒子晶型ZrO_2,并用稀H_2SO_4溶液对其进行处理,制得了对甲醇转化反应具有高活性的SO_4~(2-)/ZrO_2超强酸催化剂.首次发现,晶型金属氧化物ZrO_2,当它是超细粒子(粒径<0.1μm)时,同样可以用H_2SO_4溶液浸渍的方法制得SO_4~(2-)/ZrO_2固体超强酸.这一事实同时还说明,超细粒子与非超细粒子不仅在某些物理性质上有较大区别,而且在化学性质上也有差别. The ultrafine particle ZrO_2 was prepared by supercritical fluid drying method and treated with dilute H_2SO_4 solution to prepare SO_4 ~ (2 -) / ZrO_2 superacid catalyst with high activity for methanol conversion.It was found for the first time that the crystal Type of metal oxide ZrO 2, when it is ultrafine particles (particle size <0.1μm), the same can be impregnated with H_2SO_4 solution SO_4 ~ (2 -) / ZrO_2 solid superacid. This fact also shows that, Ultrafine particles and non-ultrafine particles not only in some physical properties are greatly different, but also in the chemical properties are also different.