Process for the selective hydrogenation of a gasoline

摘要

The present application relates to a process for the selective hydrogenation of a gasoline which contains polyunsaturated compounds and sulphurous light compounds, the process allowing conjointly the hydrogenation of polyunsaturated compounds into mono-unsaturated compounds, increasing weight of the sulphurous light compounds by reaction with the unsaturated compounds, and maximization of the isomerization of the monounsaturated compounds comprising an external C═C double bond into their internal C═C double bond isomer, said process implementing a catalyst containing at least one group VIb metal and at least one group VIII metal deposited on a porous support.

主权项

1. A process of selective hydrogenation of a gasoline comprising polyunsaturated compounds and sulphurous light compounds, said process enables, conjointly, hydrogenation of the polyunsaturated compounds into monounsaturated compounds, weighting of the sulphurous saturated light compounds by reaction with the monounsaturated compounds, and isomerisation of the monounsaturated compounds comprising an external C═C double bond into their isomer having an internal C═C double bond, said process is conducted in the presence of a catalyst containing at least one group VIb metal and at least one group VIII metal deposited on a porous support, wherein:
the content by weight of oxide of the group VIb element with reference to the weight of the catalyst is 6 to 18%; the content by weight of oxide of the group VIII element with reference to the weight of the catalyst is 4 to 12%; the specific surface area of the catalyst is 200 to 270 m2/g; the density of the group VIb element, expressed as being the ratio of the said content by weight of oxide of the group VIb element to the specific surface area of the catalyst, is 4×10−4 g/m2 to 6×10−4; and the molar ratio between the group VIII metal and the group VIb metal is 0.6 to 3 mol/mol.