GROUP-BEHAVIOR OF SAPO-11 MOLECULAR-SIEVES CONTAINING VARIOUS METALS (MG, ZN, MN OR CD, NI, CR)

Derivatives of SAPO-11 containing Mg, Zn, Mn, Cd, Ni and Cr as heteroa toms have been synthesized. These additions influence considerably bot h the properties and the morphology of the crystalline phases synthesi zed. The products noted as MeAPSO-11 were investigated with light micr oscopy, scanning electron microscopy (SEM), electron microprobe analys is (EPM), X-ray diffraction (XRD), temperature-programmed XRD, differe ntial thermal analysis (DTA), thermogravimetry (TG), magic-angle spinn ing nuclear magnetic resonance (MAS NMR) and wet chemical analysis. Th e materials can be clearly divided into two groups: (1) Mg, Zn or Mn, or (2) Cd, Ni or Cr containing preparations. The results suggest that all metals are incorporated into the framework of SAPO-11 molecular si eve, though in rather different amounts. The content of heteroatoms de cides the properties of the synthesized molecular sieves.