Mineral oils: processes and products – Refining – Sulfur removal
Reexamination Certificate
2008-03-18
2008-03-18
Nguyen, Tam M. (Department: 1764)
Mineral oils: processes and products
Refining
Sulfur removal
C208S209000, C208S218000
Reexamination Certificate
active
07344635
ABSTRACT:
Process for desulfurization of an effluent for cracking or steam-cracking hydrocarbons, more particularly a gasoline for example for catalytic cracking that comprises the elimination of thiophenic compounds by alkylation of these compounds, followed by a distillation, a hydrocracking of said alkyl-thiophenic compounds, then a hydrodesulfurization of the effluent that is obtained from the hydrocracking zone. In a preferred embodiment, this process comprises a preliminary stage for separating the cracking or steam-cracking effluent into three fractions, and proposes sending to the alkylation stage only the intermediate fraction that is low in heavy basic nitrogen-containing compounds that are initially present in the effluents that are to be alkylated.
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Boucot Pierre
Briot Patrick
Forestiere Alain
Marchal-George Nathalie
Picard Florent
Institut Francais du Pe'trole
Millen White Zelano & Branigan P.C.
Nguyen Tam M.
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