Crystalline microporous solids consisting of aluminophosphates substituted by a metal and optionally by silicon and belonging to the FAU structure type, their synthesis and applications
AssigneeElf Aquitaine
InventorsThierry Des Courieres, Joel Patarin, Jean Louis Guth, Ligia Sierra
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Abstract
Crystalline microporous solids of the aluminophosphate type consisting of MeAPO-FAU and MeAPSO-FAU with Me denoting a metal which can adopt tetrahedral coordination in an oxide, for example Co and Zn. The solids are synthesized by hydrothermal crystallization of a gel containing the elements Me, Al, P or Me, Al, P and Si and a structuring agent consisting of a mixture of tetrapropylammonium and tetramethylammonium cations. These solids can be employed in adsorption and also as catalysts in the conversion of organic compounds such as hydrocarbons.
Claims37
Crystalline microporous solids consisting of aluminophosphates substituted in the framework by a divalent metal Me (MeAPO solids) or by a divalent metal Me and silicon (MeAPSO solids), which exhibit a molar composition of their framework which, expressed as oxide, is defined by the empirical formula (Me.sub.x Al.sub.y P.sub.z)O.sub.2 in the case of the MeAPO solids and (Me.sub.x Al.sub.u P.sub.v Si.sub.w)O.sub.2 in the case of the MeAPSO solids, with the symbols x, y, z, u, v and w denoting the molar contents of the elements associated with these symbols in the corresponding formula of the oxide with x+y+z=1 and x+u+v+w=1, the said solids having a crystal structure corresponding substantially to that of faujasite and in the said framework formulae (Me.sub.x Al.sub.y P.sub.z)O.sub.2 and (Me.sub.x Al.sub.u P.sub.v Si.sub.w)O.sub.2 the symbols x, y, z, u, v and w are such that 0.001.ltoreq.x.ltoreq.0.15, 0.34.ltoreq.y.ltoreq.0.51, 0.49.ltoreq.z.ltoreq.0.51, 0.30.ltoreq.u.ltoreq.0.51, 0.30.ltoreq.v.ltoreq.0.51 and 0.001.ltoreq.w.ltoreq.0.20.
Dependencies are inferred from the claim text.