23-04-2015 дата публикации
Номер: US20150112109A1
Принадлежит:
A layered multimetallic mixed oxide (LMMO) is characterized by one or more diffraction peaks at 5<2θ<15, preferably between 10<2θ<15. The catalysts can be represented by the general formula: 113-. (canceled)14. A process for preparing a nanometer and micrometer layered multimetallic oxide catalyst having the formula{'br': None, 'sub': 'δ', 'M1 M2 M3 O'}wherein:M1 is selected from the group of Ag, Au, Zn, Sn, Rh, Pd, Pt, Cu, Ni, Fe, Co, an alkaline metal, an alkaline earth metal, a rare earth metal, and mixtures thereof;M2 is selected from the group of Ti, Hf, Zr, Sn, Bi, Sb, V, Nb, Ta and P, and mixtures thereof;M3 is selected from the group of Mo, W and Cr, and mixtures thereof;and where said multilayered metallic oxide exhibits a major X-ray diffraction peak between 5<2θ<15,said process comprising the steps of{'sub': 1', '2', '3, 'mixing metallic precursors of M, Mand Mto form a precursor mixture,'}hydrothermal treatment of the resulting mixture to obtain a homogeneous solid mixture, andthermally treating the solid mixture to activate the solid mixture and obtain said catalyst.15. The process of claim 14 , whereinthe precursors are mixed by mechanical mixing or by dissolution of the corresponding metal salts.17. The process of claim 14 , further comprising the steps ofadding a chemical agent to the precursor mixture selected from the group consisting of an amino acid, glycine, amines, urea or carboxylic acids, or a mixture thereof.18. The process of claim 14 , whereinsaid precursors are selected from the group consisting of pure metallic elements, metallic salts, metallic oxides, metallic hydroxides, metallic alkoxides, acids, and mixtures thereof.19. The process of claim 18 , whereinsaid precursors are selected from the group consisting of nitrates, oxalates, sulfates, carbonates, halides, and mixtures thereof.20. The process of claim 14 , whereinsaid catalyst exhibits at least one X-ray diffraction pattern selected from the group consisting of monoclinic lattice ...
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