Patent ID: 6042806
Filing Date: 2000-03-28
Classification: B01J,C01B,C01G,C01P

Abstract:
A non-pillared metal oxide triple-layered perovskite, having a surface area of at least 30 m.sup.2 /g and an empirical formula ofAB.sub.2 M.sub.3 O.sub.10-xwhere A is a monovalent exchangeable cation, B is at least one metal ion having a valence of +2 or +3, M is at least one metal ion having a valence of +2, +3, +4 or +5 and defined by the equationM.sub.3 =M.sub.e.sup.+2 +M.sub.f.sup.+3 +M.sub.g.sup.+4 +M.sub.h.sup.+5where e, f, g and h are the mole fractions of M.sup.+2, M.sup.+3, M.sup.+4 and M.sup.+5 respectively, e has a value from about 0 to about 1, f has a value from about 0 to about 1, g has a value from about 0 to about 3, h has a value from about 0 to about 3, 3=e+f+g+h and 1 .gtoreq.e+f and ""x"" has a value from about 0 to about 1.