University of Tehran Journal of Sciences, Islamic Republic of Iran 1016-1104 14 3 2003 09 01 SYNTHESIS, CHARACTERIZATION AND CATALYTIC BEHAVIOUR OF SPECIAL TYPE OF SILICO ALUMINO-PHOSPHATE WITH OPAL STRUCTURE - 31708 EN Journal Article In this study a special type of silicoaluminophosphate with opal structure (Opal-SAPO) was prepared under microwave condition using tetraethylorthosilicate (TEOS), triethanolamine (TEA), aluminiumisopropoxid and phosphoric acid 85%. The product was characterized by X-ray diffraction (XRD), thermogravimetric (TGA) and Fourier Infrared Spectroscopy (FTIR).The crystalline product showed a good activity and selectivity for regeneration of methylethylketone, benzaldehyde, and cyclohexanone from their semicarbazones derivatives. https://jsciences.ut.ac.ir/article_31708_9f205dad67b7407fec00834c17b2cf2e.pdf