Studies on the Synthesis and Properties of Novel Silicoalummophosphate Molecular Sieve CHSAPO-7

Abstract

Abstract: A novel silicoaluminophosphate molecular sieve CHSAPO-7 was synthesized hy-drothermally in the system [(i-C₃H₇)₂NH]-Al₂O₃-P₂O₅-SiO₂-H₂O.The samples obtained were characterized by means of X-ray powder diffraction analysis and infrared spectroscopy.The result of electron probe energy dispersion analysis of CHSAPO-7 indicates that Si atoms are inserted into the framework of CHSAPO-7.The chemical composition of CHSAPO-7 was determined.The properties of CHSAPO-7 , such as crystal morphology, adsorption capacities and thermal stabilitity, were studied.In addition, the influence of the amount of diisopropylamine used and the initial pHvalue of the reaction mixture on the crystal phase of product was investigated.

Key words: Silicoaluminophosphate, Molecular sieve, Synthesis, Property, Hydrothermal crystallization

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ZHAO Rui-lan, ZHAO Zhen-hua . Studies on the Synthesis and Properties of Novel Silicoalummophosphate Molecular Sieve CHSAPO-7[J]. Chem. J. Chinese Universities, 1992, 13(4): 425.

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Studies on the Synthesis and Properties of Novel Silicoalummophosphate Molecular Sieve CHSAPO-7

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