SYNTHESIS AND CHARACTERIZATION OF ALPO4-1 2 MOLECULAR-SIEVE FROM H3PO4-I-C3H7OAL-H2NCH2CH2NH2-HOCH2CH2OH SYSTEM

Hydrothermal crystallization of aluminophosphate molecule sieve (AlPO4 -12) was carried out from H3PO4-i-C3H7OAl-H2NCH2CH2NH2-HOCH2CH2OH syst em, Using aluminum triisopropoxide and phosphorous acid (85 wt%) as th e aluminum and phosphorous sources, The influences of some main factor s (pH, the ratio of P2O5/Al2O3 and the aluminum and phosphorous source s, etc.) on the resulting structure were studied. The product was char acterized by means of X-ray powder diffraction, scanning electron micr oscope, infrared spectroscopy, differential analysis and thermogravime tric analysis. The results of investigating the crystallization of AlP O4-12 from non-aqueous system were preliminarily summarized. We found that the organic template, H2NCH2CH2NH2, had two different kinds of en vironments: one interacted with the skelton by weak hydrogen-bond, the others interacted with the skelton by strong hydrogen-bond.