Crystalline ferroaluminophosphates
AssigneeUnion Carbide Corporation
InventorsCeleste A. Messina, Brent M. Lok, Edith M. Flanigen
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Abstract
Novel class of crystalline microporous ferroaluminophosphate compositions containing as lattice constituents in addition to AlO.sub.2 and PO.sub.2 structural units, ferric and/or ferrous iron in tetrahedral coordination with oxygen atoms. These compositions are prepared hydrothermally using organic templating agents and are suitably employed as catalysts or adsorbents.
Claims19
Crystalline ferroaluminophosphate having a three-dimensional microporous framework structure of FeO.sub.2, AlO.sub.2 and PO.sub.2 tetrahedral units and having an empirical chemical composition on an anhydrous basis expressed by the formula
- mR:(Fe.sub.x Al.sub.y P.sub.z)O.sub.2
- wherein "R" represents at least one organic templating agent present in the intracrystalline pore system;
- "m" represents the moles of "R" present per mole of (Fe.sub.x Al.sub.y P.sub.z)O.sub.2 and has a value of from zero to 0.3, "x", "y and "z" represent the mole fraction of the iron, aluminum and phosphorus respectively present as tetrahedral oxides, said mole fractions being such that they are within the tetragonal compositional area defined by points A, B, C and D of the ternary diagram which is FIG. 1 of the drawings.
Dependencies are inferred from the claim text.