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

摘要

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^z+ selected from the group constituted by cations from columns IIA, IIIA, IIIB, IVB and IVA of the periodic table; or1)b) using a commercial aqueous colloidal solution (solution A) with a defined pH containing oxy(hydroxide) particles of a cation M^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.