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: [M(II)1?x?y?zM(II)?xM(III)yM(III)?z(OH)2](An?y+z/n).mH2O. 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.

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: [M(II)1?x?y?zM(II)?xM(III)yM(III)?z(OH)2](An?y+z/n).mH2O. 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.

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: [M(II)1?x?y?zM(II)?xM(III)yM(III)?z(OH)2](An?y+z/n).mH2O. 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.

Abstract: Multimetallic anionic clays (MACs) are prepared using economical raw materials or reactants and a procedure for obtaining a series of multimetallic mixed oxides derived from the thermal decomposition of the MACs which comprises: (1) dissolving water-soluble bimetallic and/or trimetallic sources in water, (2) dispersing and homogenizing separate water-insoluble divalent and/or trivalent metal precursors with a high-speed stirrer in order to obtain small and reactive particles; depending on the nature of the water-insoluble divalent and/or trivalent metal precursors, this process can be adjusted to a desired pH, (3) adding the suspension obtained in (2) to solution (1) with the reaction medium still dispersed to facilitate solid particle's reduction/dissociation, and (4) afterwards the slurry is aged for several hours and finally dried. This process enables raw materials or reactants to be easily handled, and eliminates unit operations involving product washing and/or purification steps.

Abstract: Multimetallic anionic clays (MACs) are prepared using economical raw materials or reactants and a procedure for obtaining a series of multimetallic mixed oxides derived from the thermal decomposition of the MACs which comprises: (1) dissolving water-soluble bimetallic and/or trimetallic sources in water, (2) dispersing and homogenizing separate water-insoluble divalent and/or trivalent metal precursors with a high-speed stirrer in order to obtain small and reactive particles; depending on the nature of the water-insoluble divalent and/or trivalent metal precursors, this process can be adjusted to a desired pH, (3) adding the suspension obtained in (2) to solution (1) with the reaction medium still dispersed to facilitate solid particle's reduction/dissociation, and (4) afterwards the slurry is aged for several hours and finally dried. This process enables raw materials or reactants to be easily handled, and eliminates unit operations involving product washing and/or purification steps.

Abstract: Multimetallic anionic clays (MACs) are prepared using economical raw materials or reactants and a procedure for obtaining a series of multimetallic mixed oxides derived from the thermal decomposition of the MACs which comprises: (1) dissolving water-soluble bimetallic and/or trimetallic sources in water, (2) dispersing and homogenizing separate water-insoluble divalent and/or trivalent metal precursors with a high-speed stirrer in order to obtain small and reactive particles; depending on the nature of the water-insoluble divalent and/or trivalent metal precursors, this process can be adjusted to a desired pH, (3) adding the suspension obtained in (2) to solution (1) with the reaction medium still dispersed to facilitate solid particle's reduction/dissociation, and (4) afterwards the slurry is aged for several hours and finally dried. This process enables raw materials or reactants to be easily handled, and eliminates unit operations involving product washing and/or purification steps.

Abstract: Multimetallic anionic clays (MACs) are prepared using economical raw materials or reactants and a procedure for obtaining a series of multimetallic mixed oxides derived from the thermal decomposition of the MACs which comprises: (1) dissolving water-soluble bimetallic and/or trimetallic sources in water, (2) dispersing and homogenizing separate water-insoluble divalent and/or trivalent metal precursors with a high-speed stirrer in order to obtain small and reactive particles; depending on the nature of the water-insoluble divalent and/or trivalent metal precursors, this process can be adjusted to a desired pH, (3) adding the suspension obtained in (2) to solution (1) with the reaction medium still dispersed to facilitate solid particle's reduction/dissociation, and (4) afterwards the slurry is aged for several hours and finally dried. This process enables raw materials or reactants to be easily handled, and eliminates unit operations involving product washing and/or purification steps.

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: [M(II)1?x?y?zM(II)?xM(III)yM(III)?z(OH)2](An?y+z/n).mH2O. 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.