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Al/Ce pillared montmorillonite: preparation and structural properties

DING Shu-li,LI Ping, DU Zhen-chuan,SHI Chang-lin,LUO Zhong (1Hebei institute of architectural science and technology, Hebei Handan 058038,China ; 2.China petroleum institute of exploration and research, Beijing 100083, China)  
Al/Ce pillared montmorillonite were prepared by cation exchange of different bentonites with hydrothermally treated (120-150℃ for 12-72h.) solution containing mixture of aluminum chlorohydrate (ACH) and REE(Ce) salts. After calculation at 450℃ or 500℃ the pillared montmorillonite are characterized by basing spacing of 2.51nm to 2.54nm and have BET surface areas of approximately 430m2/g , and also be stable at least 500℃. The large basal spacing and surface areas are due to the formation of large Al/Ce containing polyoxycation. High initial Al concentrations (at least 3.7M) and proper OH/Al molar ratio (at least 2.5) as well as Al/Ce ratio between 10-30 favored the formation of this cation.
【Fund】: 河北省自然科学基金!(499330);; 煤炭科学基金!(97地11010)
【CateGory Index】: TQ170
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