Synthesis and characterization of AlPO4-36: a novel aluminophosphate molecular sieve with ATS structure

AlPO-36, the parent member of the ATS, molecular sieve structure type, has been synthesized hydrothermally from gels containing only Al and P oxides. Four series of syntheses were carried out to determine the best conditions for the preparation of AlPO-36 free of AlPO-H3, Characterization of the syn thesis products was performed using X-ray diffraction (XRD), chemical analy sis, scanning electron microscopy (SEM), N-2 adsorption, X-ray photoelectro n spectroscopy (XPS) and Al-27 and P-31 MAS NMR. X-ray powder diffraction p atterns are comparable to those previously reported for MAPO-36. (C) 1999 E lsevier Science B.V. All rights reserved.