Preparation and Catalytic Behaviour of Cr2O3-Pillared Tin Phosphate with High Surface Area

Abstract

Abstract: The preparation of Cr₂O₃-pillared tin phosphate was studied in detail. The previ-ous method with two-step colloidization by propylamine and a great amount of NMe₄Cl was innovated, and Cr₂O₃-pillared tin phosphate samples with a high surface area were prepared successfully through one-step colloidization by various ammes. The surface area of the sam-ples prepared reached 445m²/g, which was much higher than the value 380m²/g reported in literatures. After calcination at 400℃ the samples possess a prefect pillared structure and uniform slit-shaped mesopores with diameters between 1.7-5.0nm.The Crm₂O₃-pillared tin phosphate samples are weakly acidic, and are catalytically active for dehydration of iso-propanol and n-propanol. The cyclohexane dehydrogenation activity of the samples are high-er than that of a conventional Cr₂O₃ supported catalyst, showing that Cr₂O₃ in the pillared catalysts is in highly dispensed state.

Key words: Pillared layered tin phosphate, Pore structure, Acid catalytic reaction, Dehydrogenation reaction

CLC Number:

O643.32

TrendMD:

TANG Yi, ZHANG Hua, WANG Xia, GAO Zi . Preparation and Catalytic Behaviour of Cr₂O₃-Pillared Tin Phosphate with High Surface Area[J]. Chem. J. Chinese Universities, 1997, 18(8): 1337.

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Preparation and Catalytic Behaviour of Cr₂O₃-Pillared Tin Phosphate with High Surface Area

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