Chemistry of inorganic compounds – Oxygen or compound thereof – Metal containing
Reexamination Certificate
2011-06-21
2011-06-21
Silverman, Stanley (Department: 1736)
Chemistry of inorganic compounds
Oxygen or compound thereof
Metal containing
C423S594100, C423S594200, C423S594300, C423S594400, C423S594500, C423S594600, C423S595000, C423S596000, C423S594140, C423S594160, C423S604000, C423S624000
Reexamination Certificate
active
07964175
ABSTRACT:
A procedure for obtaining mixed multimetallic oxides derived from hydrotalcite type compounds, characterized in that the laminar metallic hydroxides obtained are constituted by three or four metallic cations, forming part of the sheets of the hydrotalcite type material represented by the formula:in-line-formulae description="In-line Formulae" end="lead"?[M(II)1−x−y−zM(II)′xM(III)yM(III)′z(OH)2](An−y+z
).mH2O.in-line-formulae description="In-line Formulae" end="tail"?by a process comprising: (1) preparing an aqueous or organic solution containing three or more cations; (2) preparing an alkaline solution; (3) slowly combining solutions (1) and (2) to cause the co-precipitation of the cations in the form of hydroxides; (4) washing the precipitate containing the hydrotalcites with water, until removal of the non-precipitated ions; (5) drying; and (6) calcining the hydrotalcites.
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Hernández Beltrán Francisco
López Salinas Esteban
Sánchez Cantú Manuel
Sánchez Valente Jaime
Fiorito James A
Instituto Mexico del Petroleo
Roylance Abrams Berdo & Goodman L.L.P.
Silverman Stanley
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