固体超强酸WO_3-ZrO_2-HMS的直接合成及其催化性能研究

Direct Synthesis of Solid Superacid WO_3-ZrO_2-HMS and Study of its Catalytic Property

以硝酸锆为锆源、钨酸钠为钨源、十二胺为模板剂,采用直接合成法制备WO3-ZrO2-HMS固体催化剂。用流动指示剂法测定催化剂的酸强度,结果显示超强酸性质。以冰醋酸与异戊醇为原料合成乙酸异戊酯,得出最佳制备和反应条件。在最佳条件下,酯产率可达71.1%,且该固体超强酸可重复使用。

A solid catalyst WO3 -ZrO2 -HMS was produced by direct synthesis method using zirconium nitrate, sodium tungstate and 12 -amine as precursors. The flow indicator method was used to test the acidity of the catalyst and the results show that the catalyst exhibits super strong acidity. Isoamylaeetate was synthesized from glacial acetic acid and isoamyl alcohol with the solid superacid WO3 - ZrO2 - HMS as actalyst. The optimum preparetion and reaction conditions were obtained. The lsoamylacetate yield reaches 71.1% at the optimun conditions and the catalyst could be used repeatedly.