TRIMETALLIC CATALYST MADE FROM NICKEL, MOLYBDENUM AND TUNGSTEN AND USE THEREOF IN A HYDROTREATMENT AND/OR HYDROCRACKING PROCESS

Abstract

A subject matter of the invention is a catalyst comprising a support and an active phase consisting of nickel, molybdenum and tungsten, and phosphorus, the nickel content, measured in the NiO form, is between 3% and 4% by weight; the molybdenum content, measured in the MoO3 form, is between 2% and 4% by weight; the tungsten content, measured in the WO3 form, is between 34% and 40% by weight; the phosphorus content, measured in the P2O5 form, is between 3% and 4% by weight, with respect to the total weight of the catalyst; the WO3/MoO3 molar ratio is between 5.3 and 12.4 mol/mol, the NiO/(WO3 + MoO3) molar ratio is between 0.20 and 0.33 mol/mol and the P2O5/(WO3 + MoO3) molar ratio is between 0.21 and 0.34 mol/mol. The invention also relates to its method of preparation and to its use in hydrotreating and/or hydrocracking.

Description

Claims

1. A catalyst comprising a support based on alumina or silica or silica-alumina, an active phase consisting of nickel, molybdenum and tungsten, and phosphorus, characterized in that: the content of nickel, measured in the NiO form, is between 3% and 4% by weight, with respect to the total weight of the catalyst,the content of molybdenum, measured in the MoO3 form, is between 2% and 4% by weight, with respect to the total weight of the catalyst,the content of tungsten, measured in the WO3 form, is between 34% and 40% by weight, with respect to the total weight of the catalyst,the content of phosphorus, measured in the P2O5 form, is between 3% and 4% by weight, with respect to the total weight of the catalyst,the WO3/MoO3 molar ratio is between 5.3 and 12.4 mol/mol,the NiO/(WO3 + MoO3) molar ratio is between 0.20 and 0.33 mol/mol,the P2O5/(WO3 + MoO3) molar ratio is between 0.21 and 0.34 mol/mol.

2. The catalyst as claimed in claim 1, characterized in that: the content of nickel, measured in the NiO form, is between 3.1% and 3.9% by weight, with respect to the total weight of the catalyst,the content of molybdenum, measured in the MoO3 form, is between 2.2% and 3.8% by weight, with respect to the total weight of the catalyst,the content of tungsten, measured in the WO3 form, is between 35% and 39.9% by weight, with respect to the total weight of the catalyst,the content of phosphorus, measured in the P2O5 form, is between 3.1% and 3.9% by weight, with respect to the total weight of the catalyst,the WO3/MoO3 molar ratio is between 5.7 and 11.1 mol/mol,the NiO/(WO3 + MoO3) molar ratio is between 0.21 and 0.31 mol/mol,the P2O5/(WO3 + MoO3) molar ratio is between 0.22 and 0.33 mol/mol.

3. The catalyst as claimed in claim 2, characterized in that: the content of nickel, measured in the NiO form, is between 3.2% and 3.8% by weight, with respect to the total weight of the catalyst,the content of molybdenum, measured in the MoO3 form, is between 2.5% and 3.5% by weight, with respect to the total weight of the catalyst,the content of tungsten, measured in the WO3 form, is between 36% and 39% by weight, with respect to the total weight of the catalyst,the content of phosphorus, measured in the P2O5 form, is between 3.2% and 3.8% by weight, with respect to the total weight of the catalyst,the WO3/MoO3 molar ratio is between 6.4 and 9.7 mol/mol,the NiO/(WO3 + MoO3) molar ratio is between 0.22 and 0.30 mol/mol,the P2O5/(WO3 + MoO3) molar ratio is between 0.23 and 0.32 mol/mol.

4. The catalyst as claimed in claim 1, in which the density of metals from group VIb, expressed as number of atoms of said metals per unit area of the catalyst, is between 5 and 12 atoms of the metals from group VIb per nm2 of catalyst.

5. The catalyst as claimed in claim 1, which additionally contains an organic compound containing oxygen and/or nitrogen and/or sulfur.

6. The catalyst as claimed in claim 5, in which the organic compound is chosen from a compound comprising one or more chemical functional groups chosen from a carboxyl, alcohol, thiol, thioether, sulfone, sulfoxide, ether, aldehyde, ketone, ester, carbonate, amine, nitrile, imide, oxime, urea or amide functional group or also compounds including a furan ring or also sugars.

7. The catalyst as claimed in claim 6, in which the organic compound is chosen from γ-valerolactone, 2-acetylbutyrolactone, triethylene glycol, diethylene glycol, ethylene glycol, ethylenediaminetetraacetic acid (EDTA), maleic acid, malonic acid, citric acid, acetic acid, oxalic acid, gluconic acid, glucose, fructose, sucrose, sorbitol, xylitol, γ-ketovaleric acid, a di(C1-C4 alkyl) succinate and more particularly dimethyl succinate, dimethylformamide, 1-methyl-2-pyrrolidinone, propylene carbonate, 2-methoxyethyl 3-oxobutanoate, bicine, tricine, 2-furaldehyde (also known under the name furfural), 5-hydroxymethylfurfural, 2-acetylfuran, 5-methyl-2-furaldehyde, ascorbic acid, butyl lactate, ethyl lactate, butyl butyryllactate, ethyl 3-hydroxybutanoate, ethyl 3-ethoxypropanoate, 2-ethoxyethyl acetate, 2-butoxyethyl acetate, 2-hydroxyethyl acrylate, 1-vinyl-2-pyrrolidinone, 1,3-dimethyl-2-imidazolidinone, 1,5-pentanediol, 1-(2-hydroxyethyl)-2-pyrrolidinone, 1-(2-hydroxyethyl)-2,5-pyrrolidinedione, 5-methyl-2(3H)-furanone, 1-methyl-2-piperidinone, 4-aminobutanoic acid, butyl glycolate, ethyl 2-mercaptopropanoate, ethyl 4-oxopentanoate, diethyl maleate, dimethyl maleate, dimethyl fumarate, diethyl fumarate, dimethyl adipate and dimethyl 3-oxoglutarate.

8. The catalyst as claimed in claim 5, in which the content of organic compound is between 1% and 30% by weight, with respect to the total weight of the catalyst.

9. The catalyst as claimed in claim 1, being at least partially sulfided.

10. A process for the preparation of a catalyst as claimed in claim 1, comprising the following stages: a) at least one nickel precursor, one molybdenum precursor and one tungsten precursor and phosphorus are brought into contact with a support based on alumina or silica or silica-alumina, so as to obtain a catalyst precursor,b) said catalyst precursor resulting from stage a) is dried at a temperature of less than 200° C.

11. The process for the preparation of a catalyst as claimed in claim 10, additionally comprising a stage c) in which the catalyst obtained in stage b) is calcined at a temperature of between 200° C. and 550° C.

12. The process for the preparation of a catalyst as claimed in claim 10, additionally comprising a stage d) in which the catalyst obtained in stage b) or in stage c) is sulfided.

13. A process comprising hydrotreating and/or hydrocracking of hydrocarbon cuts by subjecting said cuts to hydrotreating and/or hydrocracking conditions in the presence of a catalyst according to claim 1.