A single-pot method of producing a hydrodesulfurization catalyst by hydrothermally treating a hydrothermal precursor that includes a silica source, a structural directing surfactant, an aqueous acid solution, and metal precursors that contain active catalyst materials is provided. The hydrodesulfurization catalyst includes a catalyst support having SBA-15 and preferably titanium, wherein the active catalyst materials are homogenously deposited on the catalyst support. Various embodiments of said method and the hydrodesulfurization catalyst are also provided.

A single-pot method of producing a hydrodesulfurization catalyst by hydrothermally treating a hydrothermal precursor that includes a silica source, a structural directing surfactant, an aqueous acid solution, and metal precursors that contain active catalyst materials is provided. The hydrodesulfurization catalyst includes a catalyst support having SBA-15 and preferably titanium, wherein the active catalyst materials are homogenously deposited on the catalyst support. Various embodiments of said method and the hydrodesulfurization catalyst are also provided.

A process for hydrodesulfurizing an olefinic naphtha feedstock while retaining a substantial amount of the olefins, which feedstock has a T95 boiling point below 250 C. boils and contains at least 50 ppmw of organically bound sulfur and from 5% to 60% olefins, said process including (a) selective diolefin hydrogenation, under reaction conditions to convert at least 50% or 90% of the diolefins to paraffins or mono-olefins providing a pre-treated feedstock, (b) hydrodesulfurizing the pre-treated feedstock in a sulfur removal stage in the presence of hydrogen and a hydrodesulfurization catalyst, at hydrodesulfurization reaction conditions to convert at least 50% of the organically bound sulfur to hydrogen sulfide and to produce a desulfurized product stream containing from 0 ppmw to 50 ppmw organically bound sulfur, with the associated benefit of such a process providing a lower octane loss, compared to a process with a lower gas to oil ratio.

A process for hydrodesulfurizing an olefinic naphtha feedstock while retaining a substantial amount of the olefins, which feedstock has a T95 boiling point below 250 C. boils and contains at least 50 ppmw of organically bound sulfur and from 5% to 60% olefins, said process including (a) selective diolefin hydrogenation, under reaction conditions to convert at least 50% or 90% of the diolefins to paraffins or mono-olefins providing a pre-treated feedstock, (b) hydrodesulfurizing the pre-treated feedstock in a sulfur removal stage in the presence of hydrogen and a hydrodesulfurization catalyst, at hydrodesulfurization reaction conditions to convert at least 50% of the organically bound sulfur to hydrogen sulfide and to produce a desulfurized product stream containing from 0 ppmw to 50 ppmw organically bound sulfur, with the associated benefit of such a process providing a lower octane loss, compared to a process with a lower gas to oil ratio.

In a process for hydrotreatment of a gas stream containing both olefins and diolefins as well as organic sulfur compounds, the gas stream is introduced into a pre-treatment reactor, where diolefins are reacted with hydrogen in the presence of a supported Mo-catalyst not containing Co or Ni, whereby the diolefins are substantially converted to olefins. Then the gas stream is introduced into a hydrotreater reactor having a higher inlet temperature than the pre-treatment reactor, in which the gas stream is reacted with hydrogen in the presence of a hydrotreating catalyst under hydrodesulfurisation process conditions, whereby the olefins are substantially converted to paraffins and the organic sulfur compounds are converted to H.sub.2S, which is removed by subjecting the hydrotreated gas to a chemisorption or physisorption treatment.

The present invention relates to a process for treating a plastics pyrolysis oil, comprising: a) hydrogenation of said feedstock in the presence of at least hydrogen and of at least one hydrogenation catalyst at an average temperature of between 140 and 340 C., the outlet temperature of step a) being at least 15 C. higher than the inlet temperature of step a), to obtain a hydrogenated effluent; b) hydrotreatment of said hydrogenated effluent in the presence of at least hydrogen and of at least one hydrotreatment catalyst, to obtain a hydrotreated effluent, the average temperature of step b) being higher than the average temperature of step a); c) separation of the hydrotreated effluent in the presence of an aqueous stream, at a temperature of between 50 and 370 C., to obtain at least one gaseous effluent, an aqueous liquid effluent and a hydrocarbon-based liquid effluent.

Systems and processes for the treatment of a naphtha range hydrocarbon feedstock comprising sulfur-containing compounds, nitrogen-containing compounds, olefins, diolefins, and aromatics. The systems and processes are configured to treat the naphtha range hydrocarbon feedstock to convert the sulfur-containing compounds, nitrogen-containing compounds, and olefins, diolefins while less than 2 wt % aromatics are hydrogenated, producing an olefin lean overheads fraction comprising less than 0.2 wt % olefins and less than 100 mg/kg sulfur and an aromatics rich fraction comprising less than 50 ppmw olefins, less than 0.5 ppmw sulfur and less than 0.5 ppmw nitrogen.

The present invention provides a two-stage process for removing polyunsaturated hydrocarbons from C4 hydrocarbon streams that, in addition to C4 hydrocarbons, also contain C5 hydrocarbons and mercaptans and/or disulfides.

The present disclosure relates to hydrogenation reactions of different fractions in oil refining. It also relates to a process device applicable thereto for hydrogenation of various feedstocks, such as arrangements during campaign changes.

The present invention relates to a method for treating a pyrolysis gasoline C5.sup.+ containing monoolefinic, diolefinic and sulfur hydrocarbons, comprising at least, and in any order: a) a step of hydrotreating the pyrolysis gasoline or a hydrocarbon fraction C6.sup.+ originating from the pyrolysis gasoline, in the presence of hydrogen and at least one hydrotreatment catalyst at a temperature ranging between 220 and 380 C. so as to produce a hydrotreated effluent; b) a step of separating the pyrolysis gasoline or the hydrotreated effluent originating from step a) when said step is completed before step b), into a separation column for separating into a top hydrocarbon fraction C5.sup. and a bottom hydrocarbon fraction C6.sup.+, said separation column comprising a reboiling section including two heat exchangers, at least one of the two exchangers being configured to perform a heat exchange with a portion of the bottom fraction that is recycled in the column via the reboiling section. According to the invention, one of the two heat exchangers of the reboiling section is supplied with at least one portion of the hydrotreated effluent so as to supply part of the heat required to operate the reboiling section.