CATALYST PREPARED BY IMPREGNATION OF AN AQUEOUS SOLUTION CONTAINING OXY(HYDROXIDE) PARTICLES OF A CATION IN INTERACTION WITH A MOLECULAR SPECIES OF A GROUP VIII METAL
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United States of America Patent
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Jun 26, 2008
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Dec 10, 2007
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Dec 11, 2006
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Abstract
The invention concerns a process for preparing a catalyst precursor comprising the following steps: 1)a) preparing a colloidal solution A with a defined pH containing oxy(hydroxide) particles of a cation M.sup.z+ selected from the group constituted by cations from columns IIA, IIIA, IIIB, IVB and IVA of the periodic table; or 1)b) using a commercial aqueous colloidal solution (solution A) with a defined pH containing oxy(hydroxide) particles of a cation M.sup.z+ selected from the group constituted by cations from columns IIA, IIIA, IIIB, IVB and IVA of the periodic table; 2) adding in an aqueous solution B containing a precursor salt of a group VIII metal with a concentration of 0.001 to 1 mole/litre, the precursor salt of the metal being soluble under the pH conditions used in step 1. The invention also concerns the catalyst obtained from a catalyst precursor and its application in selective hydrogenation.
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