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用溶胶凝胶法制备了固体超强酸,用XRD和SEM对其进行了表征,并用该固体超强酸催化合成了乙酸乙酯。结果表明:TiO2/SO24-的最佳焙烧时间为3 h,最佳焙烧温度为500℃,最佳浸渍浓度为1.5 mol/L;TiO2/SO24-催化酯化反应的最佳反应时间15 min,反应温度100-105℃,固体酸的投加量2%,最佳醇酸比1 1.3;并可重复使用,使之成为安全、绿色、环境友好的催化剂。