| CPC C10G 45/08 (2013.01) [B01J 21/04 (2013.01); B01J 27/19 (2013.01); B01J 35/615 (2024.01); B01J 35/635 (2024.01); B01J 35/647 (2024.01); B01J 37/0203 (2013.01); B01J 37/0205 (2013.01); B01J 37/0236 (2013.01); B01J 37/20 (2013.01); C10G 65/12 (2013.01); C10G 2300/1059 (2013.01)] | 11 Claims |
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1. A process for the hydrotreating of a hydrocarbon feedstock having a distillation range of between 150° C. and 600° C. at a temperature of between 180° C. and 450° C., a pressure of between 0.5 and 30 MPa, an hourly space velocity of between 0.1 and 20 h−1 and a hydrogen/feedstock ratio, expressed as volume of hydrogen, measured under standard temperature and pressure conditions, per volume of liquid feedstock, of between 50 l/l; and 5000 l/l, so as to obtain a hydrotreated effluent, said process comprising the following stages:
a) a first hydrotreating stage carried out in a first hydrotreating reaction section, employing at least one catalytic bed comprising at least one first hydrotreating catalyst, said hydrotreating reaction section being fed by at least said hydrocarbon feedstock and a gas stream comprising hydrogen, said first catalyst comprising a support based on alumina or silica or silica-alumina and an active phase consisting of nickel and molybdenum, the first catalyst has a molybdenum content of between 5% and 40% by weight, expressed as MoO3, with respect to the total weight of the catalyst, and a nickel content of between 1% and 10% by weight, expressed as NiO, with respect to the total weight of the catalyst, the first catalyst comprises phosphorus at a content of between 0.1% and 20% by weight, expressed as P2O5, with respect to the total weight of the catalyst,
b) a second hydrotreating stage carried out in a second hydrotreating reaction section, employing at least one catalytic bed comprising at least one second hydrotreating catalyst, said hydrotreating reaction section being fed by at least a part of the effluent obtained in stage a), said second catalyst comprising a support based on alumina or silica or silica-alumina and an active phase consisting of nickel, molybdenum and tungsten, and phosphorus, wherein in the second catalyst:
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 9% by weight, with respect to the total weight of the catalyst,
the content of tungsten, measured in the WO3 form, is between 29% 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 molar ratio WO3/MoO3 is between 2 and 12.4 mol/mol,
the molar ratio NiO/(WO3+MoO3) is between 0.20 and 0.33 mol/mol,
the molar ratio P2O5/(WO3+MoO3) is between 0.21 and 0.34 mol/mol, and wherein said first hydrotreating reaction section containing the first catalyst occupying a volume V1 and said second hydrotreating reaction section containing the second catalyst occupying a volume V2, the distribution of the volumes V1/V2 being of between 50% vol/50% vol and 90% vol/10% vol respectively of said first and second hydrotreating reaction section.
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