Process for the preparation of multimetallic catalysts that can be used in reactions for transformation of hydrocarbons

Abstract

The invention relates to a process for the preparation of a catalyst comprising: a) The preparation of a colloidal oxide suspension of a first metal M1 that consists in the neutralization of a basic solution by an acidic mineral solution that contains the precursor of the metal M1,b) Bringing into contact the precursor of the promoter M2, either directly in its crystallized form or after dissolution in aqueous phase, with the colloidal suspension that is obtained in stage a),c) Bringing into contact the colloidal suspension that is obtained in stage b) with the substrate,d) Drying at a temperature of between 30° C. and 200° C., under a flow of air.

Description

Claims

1. Process for the preparation of a catalyst comprising at least one metal M1 and a promoter M2 on a substrate, whereby said process comprises at least the following stages: a) The preparation of a colloidal oxide suspension of a first metal M1 that consists in the neutralization of a basic solution by an acidic mineral solution that contains the precursor of the metal M1,b) Bringing into contact the precursor of the promoter M2, either directly in its crystallized form or after dissolution in aqueous phase, with the colloidal suspension that is obtained in stage a),c) Bringing into contact the colloidal suspension that is obtained in stage b) with the substrate,d) Drying at a temperature of between 30° C. and 200° C., under a flow of air.

2. Process for preparation according to claim 1, also comprising, after drying stage d, a stage e for calcination under a flow of air at temperatures of between 100 and 600° C.

3. Process for preparation according to claim 1, in which the metal M1 is a metal that is selected from among the metals from the groups 8, 9 or 10 of the new periodic table, preferably a noble metal from the groups 8, 9 or 10.

4. Process for preparation according to claim 1, in which the promoter M2 is selected from among the groups 8, 9, 10, 11, 13 and 14 of the new periodic table.

5. Process for preparation according to claim 1, in which the metal M1 and the platinum and the precursor M2 are selected from among nickel, copper, silver, gold, indium, tin and germanium.

6. Process for preparation according to claim 1, in which the content of metal M1 is between 0.01 and 5% by weight, and the content of the promoter M2 is between 0.5 and 10% by weight.

7. Process for preparation according to claim 1, in which the substrate comprises at least one refractory oxide that is selected from among the oxides of the metals from the groups 2, 3, 4, 13 and 14 of the new periodic table.

8. Process for preparation according to claim 1, in which the substrate consists of an alumina of a specific surface area of between 5 and 200 m2/g.

9. Process for the treatment of an olefinic fraction that uses the catalyst that is prepared according to claim 1.

10. Process for treatment according to claim 9, in which the olefinic fraction is a light olefinic fraction that primarily contains hydrocarbons with 3, 4 or 5 carbon atoms.

11. Process for treatment according to claim 9, in which the catalyst is used in a fixed bed at a temperature of between 10° C. and 200° C., an adequate pressure for maintaining at least 80% by weight of the feedstock to be treated in liquid phase at the inlet of the reactor, and an hourly volumetric flow rate of between 1 and 50 h−1.