Abstract: A mesoporous molecular sieve Al-MCM-41 was synthesized directly by hydrothermal method.In this process,crystallization was controlled at 145℃ and 24～28h.Al-MCM-41 was disposed by different ways to prepare SO₄^2--Al-MCM-41.SO₄^2- Al-MCM-41was characterized by XRD,BET and FT IR measurements.The results show that the skeleton of mesoporous molecular sieves has not been destroyed and the crystallinity was improved.By FT IR,it was proved that SO₄^2- has been incorporated within the skeleton.SO₄^2--Al-MCM-41 was used as catalysts in the reaction of synthesizing terpinyl acetate.The results showed that SO₄^2- Al-MCM-41 synthesized by using 0.25mol/L H₂SO₄ to infuse calcined Al-MCM-41 had the highest catalytic activity.

Key words: mesoporous molecular sieves, catalysisterpinyl acetate