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用浸渍法制备了Ｈ４ＳｉＷ１２Ｏ４０－Ｔｉ（ＳＯ４）２－Ｌɑ２Ｏ３－γ－Ａｌ２Ｏ３（ＨＴＬＡ）复合催化剂，以吡啶作为化学探针分子，研究了ＨＴＬＡ及γ－Ａｌ２Ｏ３的表面酸性质，并将ＨＴＬＡ作为催化剂，用于甲醇缩合制二甲醚的模型反应，对催化剂的活性进行了探讨
H4SiW12O40-Ti (SO4) 2-L2O3-γ-Al2O3 (HTLA) composite catalyst was prepared by impregnation method. The surface acidity of HTLA and γ-Al2O3 was investigated by using pyridine as chemical probe. HTLA was used as catalyst, Used for the model reaction of methanol condensation to dimethyl ether, the activity of the catalyst was discussed