Doped anionic clays
AssigneeAkzo Nobel N.V.
InventorsDennis Stamires, William Jones, Paul O'Connor
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Abstract
The present invention is directed to a process for the preparation of a doped anionic clay. In said process a trivalent metal source is reacted with a divalent metal source, at least one of the metal sources being either doped boehmite, doped MgO or doped brucite, to obtain a doped anionic clay. Suitable dopants are compounds containing elements selected from the group of alkaline earth metals (for instance Ca and Ba), alkaline metals, transition metals (for example Co, Mn, Fe, Ti, Zr, Cu, Ni, Zn, Mo, W, V, Sn), actinides, rare earth metals such as La, Ce, and Nd, noble metals such as Pt and Pd, silicon, gallium, boron, titanium, and phosphorus.
Claims12
A process for the preparation of doped anionic clay wherein a trivalent metal source is reacted with a divalent metal source, at least one of the metal sources being doped boehmite, doped MgO or doped brucite, having dopant incorporated and dispersed homogeneously therein to obtain a doped anionic clay, said doped boehmite being prepared by converting a boehmite precursor and a dopant to a boehmite containing the dopant in a homogeneously dispersed state, said doped MgO or doped brucite being prepared by adding a dopant to a MgO or brucite precursor in aqueous suspension and thermally treating the resulting mixture.
Dependencies are inferred from the claim text.