PROCESS OF MANUFACTURE OF A SOLID CATALYST MADE OF A SUPPORT COATED WITH A THIN CATALYTIC LAYER AND TO A PROCESS FOR ELIMINATING GASEOUS AND/OR PARTICULATE POLLUTANTS IN AN EXHAUST GAZ

摘要

The invention relates to a process of manufacture of a solid catalyst made of a support coated with a thin catalytic layer and to a process for eliminating gaseous and/or particulate pollutants in an exhaust gaz.;The process of the invention of manufacture of a solid catalyst (1) comprising a support (2) coated with a catalytic layer (3) comprises the following steps:a) preparing a solution A by dissolving alkoxide and/or chloride precursors of at least one metal selected in the group consisting of Al, Si, Ti, Zr, Fe, Zn, Nb, V and Ce in a solvent S1 having a partition coefficient lower than 1 and containing less than 5% by volume of water,b) preparing a solution B containing a surfactant, an organic acid and/or hydrochloride acid (HCl) in a solvent S2 having a partition coefficient lower than 5, preferably less than 2, even more preferably less than 1.,c) mixing solution A and solution B together, thereby obtaining a washcoat solution C,d) dip-coating the support (2) having OH groups at its surface into washcoat solution C,e) drying the coated support (2) obtained in step d),f) calcinating the dried coated support (2) obtained in step e).;The process of the invention finds application in the field of elimination of VOC's, CO and/ or particulate pollutants in an exhaust gaz.