EP4627016A1 - Procede d'hydrodesulfuration de finition des essences mettant en oeuvre un catalyseur a base de metaux du groupe vib et viii et du phosphore sur support alumine a faible surface specifique - Google Patents
Procede d'hydrodesulfuration de finition des essences mettant en oeuvre un catalyseur a base de metaux du groupe vib et viii et du phosphore sur support alumine a faible surface specifiqueInfo
- Publication number
- EP4627016A1 EP4627016A1 EP23810362.6A EP23810362A EP4627016A1 EP 4627016 A1 EP4627016 A1 EP 4627016A1 EP 23810362 A EP23810362 A EP 23810362A EP 4627016 A1 EP4627016 A1 EP 4627016A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- catalyst
- weight
- metal
- mol
- gasoline
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
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Classifications
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10G—CRACKING HYDROCARBON OILS; PRODUCTION OF LIQUID HYDROCARBON MIXTURES, e.g. BY DESTRUCTIVE HYDROGENATION, OLIGOMERISATION, POLYMERISATION; RECOVERY OF HYDROCARBON OILS FROM OIL-SHALE, OIL-SAND, OR GASES; REFINING MIXTURES MAINLY CONSISTING OF HYDROCARBONS; REFORMING OF NAPHTHA; MINERAL WAXES
- C10G11/00—Catalytic cracking, in the absence of hydrogen, of hydrocarbon oils
- C10G11/14—Catalytic cracking, in the absence of hydrogen, of hydrocarbon oils with preheated moving solid catalysts
- C10G11/18—Catalytic cracking, in the absence of hydrogen, of hydrocarbon oils with preheated moving solid catalysts according to the "fluidised-bed" technique
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10G—CRACKING HYDROCARBON OILS; PRODUCTION OF LIQUID HYDROCARBON MIXTURES, e.g. BY DESTRUCTIVE HYDROGENATION, OLIGOMERISATION, POLYMERISATION; RECOVERY OF HYDROCARBON OILS FROM OIL-SHALE, OIL-SAND, OR GASES; REFINING MIXTURES MAINLY CONSISTING OF HYDROCARBONS; REFORMING OF NAPHTHA; MINERAL WAXES
- C10G45/00—Refining of hydrocarbon oils using hydrogen or hydrogen-generating compounds
- C10G45/02—Refining of hydrocarbon oils using hydrogen or hydrogen-generating compounds to eliminate hetero atoms without changing the skeleton of the hydrocarbon involved and without cracking into lower boiling hydrocarbons; Hydrofinishing
- C10G45/04—Refining of hydrocarbon oils using hydrogen or hydrogen-generating compounds to eliminate hetero atoms without changing the skeleton of the hydrocarbon involved and without cracking into lower boiling hydrocarbons; Hydrofinishing characterised by the catalyst used
- C10G45/06—Refining of hydrocarbon oils using hydrogen or hydrogen-generating compounds to eliminate hetero atoms without changing the skeleton of the hydrocarbon involved and without cracking into lower boiling hydrocarbons; Hydrofinishing characterised by the catalyst used containing nickel or cobalt metal, or compounds thereof
- C10G45/08—Refining of hydrocarbon oils using hydrogen or hydrogen-generating compounds to eliminate hetero atoms without changing the skeleton of the hydrocarbon involved and without cracking into lower boiling hydrocarbons; Hydrofinishing characterised by the catalyst used containing nickel or cobalt metal, or compounds thereof in combination with chromium, molybdenum, or tungsten metals, or compounds thereof
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10G—CRACKING HYDROCARBON OILS; PRODUCTION OF LIQUID HYDROCARBON MIXTURES, e.g. BY DESTRUCTIVE HYDROGENATION, OLIGOMERISATION, POLYMERISATION; RECOVERY OF HYDROCARBON OILS FROM OIL-SHALE, OIL-SAND, OR GASES; REFINING MIXTURES MAINLY CONSISTING OF HYDROCARBONS; REFORMING OF NAPHTHA; MINERAL WAXES
- C10G45/00—Refining of hydrocarbon oils using hydrogen or hydrogen-generating compounds
- C10G45/32—Selective hydrogenation of the diolefin or acetylene compounds
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10G—CRACKING HYDROCARBON OILS; PRODUCTION OF LIQUID HYDROCARBON MIXTURES, e.g. BY DESTRUCTIVE HYDROGENATION, OLIGOMERISATION, POLYMERISATION; RECOVERY OF HYDROCARBON OILS FROM OIL-SHALE, OIL-SAND, OR GASES; REFINING MIXTURES MAINLY CONSISTING OF HYDROCARBONS; REFORMING OF NAPHTHA; MINERAL WAXES
- C10G45/00—Refining of hydrocarbon oils using hydrogen or hydrogen-generating compounds
- C10G45/32—Selective hydrogenation of the diolefin or acetylene compounds
- C10G45/34—Selective hydrogenation of the diolefin or acetylene compounds characterised by the catalyst used
- C10G45/36—Selective hydrogenation of the diolefin or acetylene compounds characterised by the catalyst used containing nickel or cobalt metal, or compounds thereof
- C10G45/38—Selective hydrogenation of the diolefin or acetylene compounds characterised by the catalyst used containing nickel or cobalt metal, or compounds thereof in combination with chromium, molybdenum or tungsten metals, or compounds thereof
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10G—CRACKING HYDROCARBON OILS; PRODUCTION OF LIQUID HYDROCARBON MIXTURES, e.g. BY DESTRUCTIVE HYDROGENATION, OLIGOMERISATION, POLYMERISATION; RECOVERY OF HYDROCARBON OILS FROM OIL-SHALE, OIL-SAND, OR GASES; REFINING MIXTURES MAINLY CONSISTING OF HYDROCARBONS; REFORMING OF NAPHTHA; MINERAL WAXES
- C10G65/00—Treatment of hydrocarbon oils by two or more hydrotreatment processes only
- C10G65/02—Treatment of hydrocarbon oils by two or more hydrotreatment processes only plural serial stages only
- C10G65/04—Treatment of hydrocarbon oils by two or more hydrotreatment processes only plural serial stages only including only refining steps
- C10G65/06—Treatment of hydrocarbon oils by two or more hydrotreatment processes only plural serial stages only including only refining steps at least one step being a selective hydrogenation of the diolefins
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10G—CRACKING HYDROCARBON OILS; PRODUCTION OF LIQUID HYDROCARBON MIXTURES, e.g. BY DESTRUCTIVE HYDROGENATION, OLIGOMERISATION, POLYMERISATION; RECOVERY OF HYDROCARBON OILS FROM OIL-SHALE, OIL-SAND, OR GASES; REFINING MIXTURES MAINLY CONSISTING OF HYDROCARBONS; REFORMING OF NAPHTHA; MINERAL WAXES
- C10G2300/00—Aspects relating to hydrocarbon processing covered by groups C10G1/00 - C10G99/00
- C10G2300/10—Feedstock materials
- C10G2300/1037—Hydrocarbon fractions
- C10G2300/104—Light gasoline having a boiling range of about 20 - 100 °C
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10G—CRACKING HYDROCARBON OILS; PRODUCTION OF LIQUID HYDROCARBON MIXTURES, e.g. BY DESTRUCTIVE HYDROGENATION, OLIGOMERISATION, POLYMERISATION; RECOVERY OF HYDROCARBON OILS FROM OIL-SHALE, OIL-SAND, OR GASES; REFINING MIXTURES MAINLY CONSISTING OF HYDROCARBONS; REFORMING OF NAPHTHA; MINERAL WAXES
- C10G2300/00—Aspects relating to hydrocarbon processing covered by groups C10G1/00 - C10G99/00
- C10G2300/10—Feedstock materials
- C10G2300/1037—Hydrocarbon fractions
- C10G2300/1044—Heavy gasoline or naphtha having a boiling range of about 100 - 180 °C
Definitions
- the present invention relates to the field of hydrotreatment of gasoline cuts, in particular gasoline cuts from fluidized bed catalytic cracking units. More particularly, the present invention relates to the use of catalysts in a process for producing gasoline with a low sulfur content.
- the invention applies particularly to the treatment of gasoline cuts containing olefins and sulfur, such as gasolines resulting from catalytic cracking, for which we seek to reduce the content of sulfur compounds, without hydrogenating the olefins and aromatics.
- gasoline cuts consists of specifically treating these gasolines rich in sulfur by desulfurization processes in the presence of hydrogen. We then speak of hydrodesulfurization (HDS) processes.
- HDS hydrodesulfurization
- these gasoline cuts and more particularly gasolines resulting from catalytic cracking in a fluidized bed contain a significant proportion of unsaturated compounds in the form of mono-olefins (approximately 20 to 50% by weight) which contribute to a good octane number, diolefins (0.5 to 5% by weight). ) and aromatics. These unsaturated compounds are unstable and react during the hydrodesulfurization treatment.
- Diolefins form gums by polymerization during hydrodesulfurization treatments. This formation of gums leads to progressive deactivation of the hydrodesulfurization catalysts or progressive clogging of the reactor. Consequently, diolefins must be eliminated by hydrogenation before any treatment of these essences.
- Traditional treatment processes desulphurize gasolines in a non-selective manner by hydrogenating a large part of the mono-olefins, which causes a significant loss in octane number and a high consumption of hydrogen.
- the most recent hydrodesulfurization processes make it possible to desulfurize cracked gasolines rich in mono-olefins, while limiting the hydrogenation of mono-olefins and consequently the loss of octane.
- Such processes are for example described in documents EP-A-1077247 and EP-A-1174485.
- the first stage also called the selective HDS stage
- the catalyst used is generally a CoMo type catalyst.
- new sulfur compounds are formed by recombination of H2S resulting from desulfurization with olefins: recombination mercaptans.
- the second step generally has the role of minimizing the quantity of recombinant mercaptans.
- the temperature is generally higher in the second stage in order to thermodynamically favor the elimination of mercaptans. In practice, an oven is therefore placed between the two reactors in order to be able to raise the temperature of the second reactor to a temperature higher than that of the first.
- the catalyst used in the finishing process must be particularly selective so as not to induce saturation of the olefins (and no aromatic loss) leading to a loss of octane. It must therefore make it possible to reduce the total sulfur and mercaptan contents of hydrocarbon cuts, preferably gasoline cuts, to very low contents, while minimizing the reduction in the octane number.
- the catalyst used is nickel-based.
- a catalyst based on at least one metal from group VIII, at least one metal from group VIB and phosphorus on an alumina support with a low specific surface area included in a range of values well determined when this is implemented in the finishing hydrodesulfurization section (FNS) downstream of the selective hydrodesulfurization section (HDS), allows a reduction in the hydrodesulfurization treatment temperatures of gasolines while maintaining the process performance in reducing sulfur content and preserving olefins to maintain octane number.
- a reduction in the average processing temperature in the HDS section increases the overall cycle time of the process.
- the use of a type of finishing hydrodesulfurization catalyst makes it possible to eliminate part of the refractory sulfur compounds in the finishing section while preserving the olefins induced by a high selectivity allowed by a specific interaction between the active phase and the surface of the low surface alumina support specific, as well as overall on the selective hydrodesulfurization and finishing sections to better control the hydrogenation reactions of olefins and the conversion of sulfur compounds while minimizing the treatment temperature.
- the subject of the present invention is a process for treating a gasoline containing sulfur compounds and olefins, the process comprising at least the following steps: a) gasoline, hydrogen and a catalyst are brought into contact hydrodesulphurization comprising an active phase comprising a group VIB metal and a group VIII metal at least partly in sulphide form, and an oxide support, at a temperature between 200°C and 350°C, at a pressure between between 0.2 MPa and 5 MPa, with a space velocity between 1 h -1 and 20 h -1 and a ratio between the hydrogen flow rate expressed in normal m 3 per hour and the flow rate of charge to be treated expressed in m 3 per hour at standard conditions between 10 Nm 3 /m 3 and 1000 Nm 3 /m 3 , to obtain a partially desulfurized effluent; b) without separation of the H 2 S formed in step a), the partially desulfurized effluent obtained at the end of step a), is directly brought into contact with a finishing hydrodesulfurization
- the catalyst of step b) comprises a molar ratio between phosphorus and said metal from group VIB of the active phase between 0.1 and 2.0 mol/mol.
- the catalyst of step b) comprises a specific surface area between 20 m 2 /g and 110 m 2 /g.
- the catalyst of step b) comprises an active phase consisting of molybdenum, cobalt and phosphorus, and a porous support based on alumina, the cobalt content being between 0 .5 and 5% by weight, measured in the oxide form CoO, relative to the total weight of the catalyst, the molybdenum content being between 3 and 12% by weight, measured in the oxide form MoOs, relative to the total weight of the catalyst, a phosphorus content of between 0.3 and 3% by weight, measured in the oxide form P2O5, relative to the total weight of the catalyst, the molar ratio between cobalt and molybdenum being between 0.3 and 1, 0 mol/mol, the molar ratio between phosphorus and molybdenum being between 0.2 and 0.5 mol/mol, the specific surface area of the catalyst being between 25 m 2 /g and 90 m 2 /g.
- the catalyst of step a) comprises an alumina support and an active phase comprising cobalt and molybdenum, said catalyst containing a content by weight relative to the total weight of oxide catalyst of cobalt, in CoO form, between 0.1 and 10% by weight, and a content by weight relative to the total weight of molybdenum oxide catalyst, in MoOs form, between 1 and 20% by weight, with a ratio cobalt/molybdenum molar between 0.1 and 0.8 mol/mol.
- group VIII (or VIIIB) according to the CAS classification corresponds to the metals of columns 8, 9 and 10 according to the new IIIPAC classification.
- the value of the total pore volume in ml/g or cm 3 /g given in the following text corresponds to the value of the total mercury volume (total pore volume measured by intrusion with a mercury porosimeter) in ml/g or in cm 3 /g measured on the sample minus the mercury volume value in ml/g or in cm 3 /g measured on the same sample for a pressure corresponding to 30 psi (approximately 0.2 MPa) .
- group VIII metal The contents of group VIII metal, group VI B metal and phosphorus are measured by X-ray fluorescence.
- the contents of Group VI B metals, Group VIII metals and phosphorus in the catalyst are expressed as oxides after correction for the loss on ignition of the catalyst sample at 550°C for two hours in a muffle furnace. Loss on ignition is due to loss of moisture. It is determined according to ASTM D7348.
- the process according to the invention makes it possible to treat any type of gasoline cut containing sulfur compounds and olefins, alone or in a mixture such as for example a cut from a coking unit (coking according to Anglo-Saxon terminology), visbreaking (visbreaking according to Anglo-Saxon terminology), steam cracking (steam cracking according to Anglo-Saxon terminology) or catalytic cracking (FCC, Fluid Catalytic Cracking according to Anglo-Saxon terminology).
- This gasoline may possibly be composed of a significant fraction of gasoline coming from other production processes such as atmospheric distillation (gasoline resulting from direct distillation (or straight run gasoline according to Anglo-Saxon terminology)) or from processes conversion (coking or steam cracking gasoline).
- Said feed preferably consists of a gasoline cut from a catalytic cracking unit.
- the feed is a gasoline cut containing sulfur compounds and olefins whose boiling point range typically extends from the boiling points of hydrocarbons with 2 or 3 carbon atoms (C2 or C3) up to 260° C, preferably from the boiling points of hydrocarbons with 2 or 3 carbon atoms (C2 or C3) up to 220°C, more preferably from the boiling points of hydrocarbons with 5 carbon atoms up to at 220°C.
- the method according to the invention can also treat fillers having end points lower than those mentioned above, such as for example a C5-180°C cut.
- the sulfur content of gasoline cuts produced by catalytic cracking depends on the sulfur content of the feed treated by the FCC, the presence or absence of pretreatment of the FCC feed, as well as the end point of the cut.
- the sulfur contents of an entire gasoline cut, particularly those coming from FCC are greater than 100 ppm by weight and most of the time greater than 500 ppm by weight.
- sulfur contents are often greater than 1000 ppm by weight, they can even in certain cases reach values of the order of 4000 to 5000 ppm by weight.
- the feed treated by the process according to the invention may be a feed containing sulfur compounds in a content greater than 200 ppm by weight of sulfur, and often greater than 500 ppm.
- gasolines from catalytic cracking units contain, on average, between 0.5% and 5% by weight of diolefins, between 20% and 50% by weight of olefins, between 10 ppm and 0.5% weight of sulfur including generally less than 300 ppm of mercaptans.
- the gasoline to be treated may be advantageous to first treat the gasoline in the presence of hydrogen and a selective hydrogenation catalyst so as to at least partially hydrogenate the diolefins and carry out a weighting reaction.
- a selective hydrogenation catalyst part of the light mercaptans (RSH) present in the thioethers charge, by reaction with olefins.
- the gasoline to be treated is sent to a catalytic selective hydrogenation reactor containing at least one fixed or mobile bed of catalyst for the selective hydrogenation of diolefins and the weighting of light mercaptans.
- the reaction for selective hydrogenation of diolefins and weighting of light mercaptans is preferably carried out on a sulfide catalyst comprising at least one metal from group VIII and optionally at least one metal from group VI B and an oxide support.
- the group VIII metal is preferably chosen from nickel and cobalt and in particular nickel.
- the Group VIB metal when present, is preferably chosen from molybdenum and tungsten and very preferably molybdenum.
- the oxide support of the catalyst is preferably chosen from alumina, nickel aluminate, silica, silicon carbide, or a mixture of these oxides.
- alumina is used and even more preferably, high purity alumina.
- the selective hydrogenation catalyst contains nickel at a content by weight of nickel oxide, in NiO form, of between 1 and 12%, and molybdenum at a content by weight of molybdenum oxide , in MoOs form, between 6% and 18% and a nickel/molybdenum molar ratio of between 0.3 and 2.5, the metals being deposited on a support consisting of alumina.
- the sulfurization rate of the metals constituting the catalyst is, preferably, greater than 60%.
- the gasoline is brought into contact with the catalyst at a temperature between 50 and 250°C, and preferably between 80 and 220°C, and even more preferably between 90°C. and 200°C, with an hourly volume velocity (WH) of between 0.5 h -1 and 20 h' 1 , the unit of the hourly volume velocity being the volume flow rate of charge at 15°C per volume of catalytic bed and per hour (L/L/h).
- WH hourly volume velocity
- the pressure is between 0.2 and 5 MPa, preferably between 0.6 and 4 MPa and even more preferably between 1 and 3 MPa.
- the diolefin content determined via the maleic anhydride index (MAV or “Maleic Anhydride Value” according to Anglo-Saxon terminology), according to the UOP 326 method, is generally reduced to less than 6 mg of maleic anhydride/g, or even less than 4 mg AM/g and more preferably less than 2 mg AM/g. In some cases, less than 1 mg AM/g can be obtained.
- MAV Maleic anhydride index
- the selectively hydrogenated gasoline can then be distilled into at least two cuts, a light cut and a heavy cut and possibly an intermediate cut.
- the heavy cut is treated according to the process of the invention.
- the intermediate and heavy cuts can be treated separately by the process according to the invention.
- the temperature is generally between 200°C and 350°C, and preferably between 220°C and 320°C.
- the temperature used must be sufficient to maintain the gasoline to be treated in the gas phase in the reactor.
- the quantity of catalyst used in each reactor of the first reaction section is generally such that the ratio between the volume flow rate at 15°C of gasoline to be treated expressed in m 3 per hour at standard conditions, per m 3 of catalytic bed (also called hourly volume velocity - WH) is between 1 and 20 h -1 and preferably between 2 and 10 h- 1 .
- the hydrogen required for this step can be fresh hydrogen or recycled hydrogen, preferably free of H 2 S, or a mixture of fresh hydrogen and recycled hydrogen. Preferably, a mixture of fresh hydrogen and recycled hydrogen will be used.
- the desulfurization rate of step a which depends on the sulfur content of the feed to be treated, is generally greater than 50% and preferably greater than 70% so that the product resulting from step a) contains less than 200 ppm by weight of sulfur and preferably less than 100 ppm by weight of sulfur.
- the rate of hydrogenation of the olefins is preferably less than 50%, more preferably less than 40% during this step a).
- the hydrodesulfurization catalyst of step a) comprises an active phase comprising, preferably consisting of, at least one metal from group VI B and at least one Group VIII metal, optionally phosphorus, and an oxide support, as described below.
- the group VI B metal present in the active phase of the catalyst is preferably chosen from molybdenum and tungsten.
- the group VIII metal present in the active phase of the catalyst is preferably chosen from cobalt, nickel and the mixture of these two metals.
- the content of Group VIII metal is preferably between 0.1 and 10% by weight of oxide of the Group VIII metal relative to the total weight of the catalyst, more preferably between 0.6 and 8% by weight, even more preferably between 0.6 and 7% by weight, and very preferably between 1 and 6% by weight of Group VIII metal oxide relative to the total weight of the catalyst.
- the metal is cobalt or nickel, the metal content is expressed as CoO or NiO.
- the content of metal from group VI B is preferably between 1 and 20% by weight of oxide of the metal from group VI B relative to the total weight of the catalyst, more preferably between 2 and 18% by weight, and very preferably between 3 and 16% by weight of oxide of the metal from Group VI B relative to the total weight of the catalyst.
- the metal is molybdenum or tungsten, the metal content is expressed as MoOs or WO3.
- the phosphorus/(group VI B metal) molar ratio is generally between 0.1 and 0.7 mol/mol, preferably between 0.2 and 0.6 mol/mol. .
- the catalyst of step a) comprises a specific surface area of between 60 and 250 m 2 /g, preferably between 60 and 200 m 2 /g, and even more preferably between 65 and 180 m 2 /g, and even more preferably between 70 and 130 m 2 /g.
- the total pore volume of the catalyst of step a) is generally between 0.3 cm 3 /g and 1.3 cm 3 /g, preferably between 0.4 cm 3 /g and 1.1 cm 3 / g.
- the catalyst of step a) comprises an alumina support and an active phase comprising, preferably consisting of, cobalt and molybdenum, said catalyst containing a content by weight relative to the total weight of cobalt oxide catalyst, in CoO form, between 0.1 and 10% by weight, preferably between 0.6 and 8% by weight, more preferably between 0.6 and 7% by weight and even more preferably between 1 and 6% by weight, and a content by weight relative to the total weight of molybdenum oxide catalyst, in MoOs form, of between 1 and 20% by weight, preferably between 2 and 18% by weight, and very preferably between 3 and 16% by weight, with a cobalt/molybdenum molar ratio of between 0.1 and 0.8 mol/mol, preferably between preferably between 0.2 and 0.6 mol/mol.
- the support of the hydrodesulfurization catalyst comprises a specific surface area of between 60 and 250 m 2 /g, preferably between 60 and 200 m 2 /g, and even more preferably between 65 and 180 m 2 /g, and even more preferably between 70 and 130 m 2 /g.
- the total pore volume of the hydrodesulfurization catalyst support is generally between 0.3 cm 3 /g and 1.3 cm 3 /g, preferably between 0.4 cm 3 /g and 1.1 cm 3 /g .
- the support for the hydrodesulfurization catalyst can be in the form of balls, extrudates of any geometry, platelets, pellets, compressed cylinders, crushed solids or any other format.
- the support is in the form of balls of 0.5 to 6 mm in diameter or in the form of cylindrical, trilobed or extruded quatrefoil 0.8 to 3 mm in circumscribed diameter. More preferably, the support is in the form of balls.
- the first partially desulfurized effluent obtained at the end of step a) is then sent directly and without separation to step b) of the process according to the invention.
- step b) is carried out at a higher temperature than that of step a).
- the formation of mercaptans will be disadvantaged by shifting the thermodynamic equilibrium.
- Step b) also makes it possible to continue the hydrodesulfurization of the residual sulfur compounds.
- the total desulfurization rate of step b), which depends on the sulfur content of the feed to be treated, is generally greater than 50% and preferably greater than 70% so that the product resulting from step b) contains less than 50 ppm by weight of sulfur and preferably less than 20 ppm by weight of sulfur, and even more preferably less than 10 ppm by weight of sulfur.
- the group VI B metal content of the active phase is between 1 and 20% by weight relative to the total weight of the catalyst, preferably between 2 and 15% by weight, and even more preferably between 3 and 12% by weight relative to the total weight of the catalyst.
- the Group VI B metal is preferably molybdenum. When the metal is molybdenum or tungsten, the metal content is expressed as MoOs or WO3.
- the molar ratio between said Group VIII metal of the active phase and said Group VI B metal of the active phase is between 0.1 and 2.0 mol/mol, preferably between 0.3 and 1, 0 mol/mol.
- the molar ratio between phosphorus and said group VI B metal of the active phase is between 0.1 and 2.0 mol/mol, preferably between 0.2 and 1.0 mol/mol, more preferably between 0.2 and 0.5 mol/mol.
- the specific surface area of the catalyst is greater than or equal to 20 m 2 /g and less than 150 m 2 /g, preferably between 20 m 2 /g and 110 m 2 /g, more preferably between 25 m 2 /g and 90 m 2 /g.
- the catalyst advantageously has a total pore volume measured by mercury porosimetry of between 0.3 cm 3 /g and 1.3 cm 3 /g, preferably between 0.35 cm 3 /g and 1.3 cm 3 /g, and very preferably between 0.4 cm 3 /g and 1.2 cm 3 /g.
- the support for the finishing hydrodesulfurization catalyst can be in the form of balls, extrudates of any geometry, platelets, pellets, compressed cylinders, crushed solids or any other format.
- the support is in the form of balls of 0.5 to 6 mm in diameter or in the form of cylindrical, trilobed or quadrilobed extrudates of 0.8 to 3 mm in circumscribed diameter. More preferably, the support is in the form of balls.
- This step is implemented in order to separate the excess hydrogen as well as the H2S formed during steps a) and b). Any method known to those skilled in the art can be considered.
- the liquid fraction which contains the desulfurized gasoline as well as a fraction of the dissolved H 2 S is sent to a stripping section, while the gaseous fraction consisting mainly hydrogen and H2S is sent to a purification section.
- Stripping can be carried out by heating the hydrocarbon fraction alone or with an injection of hydrogen or water vapor, in a distillation column in order to extract at the top, the light compounds which have been dissolved in the liquid fraction. as well as the residual dissolved h ⁇ S.
- the temperature of the stripped gasoline recovered at the bottom of the column is generally between 120°C and 250°C.
- Step c) is preferably implemented so that the sulfur in the form of H2S remaining in the desulphurized gasoline represents less than 30%, preferably less than 20% and more preferably less than 10% of the total sulfur. present in the treated hydrocarbon fraction.
- the catalysts used in steps a) and b) of the process according to the invention can be prepared using any technique known to those skilled in the art, and in particular by impregnation of metals from groups VIII and VI B and optionally of phosphorus on the selected porous support.
- the impregnation can for example be carried out according to the method known to those skilled in the art under the terminology of dry impregnation, in which just the quantity of precursors of the desired elements is introduced in the form of salts soluble in the chosen solvent, for example demineralized water, so as to fill the porosity of the support as exactly as possible.
- the catalyst precursor obtained can undergo heat treatment.
- This treatment generally aims to transform the molecular precursors of the elements into the oxide phase. In this case it is an oxidizing treatment but simple drying of the catalyst can also be carried out.
- the optionally dried or calcined catalyst Before its use as a hydrotreatment catalyst, it is advantageous to subject the optionally dried or calcined catalyst to an activation step by sulfurization.
- This activation phase is carried out by methods well known to those skilled in the art, and advantageously under a sulfo-reducing atmosphere in the presence of hydrogen and hydrogen sulfide.
- Hydrogen sulfide can be used directly or generated by a sulfide agent (such as dimethyldisulfide).
- group VIII metals, group VI B and phosphorus are measured by X-ray fluorescence.
- the Co/Mo and P/Mo molar ratios are 0.36 and 0.25, respectively.
- a support C' composed of alumina is provided in the form of beads with a particle size between 2 and 4 mm, and having a specific surface area of 139 m 2 /g and a pore volume of 0.97 mL/g.
- a support D' composed of alumina is provided in the form of beads with a particle size between 2 and 4 mm, and having a specific surface area of 194 m 2 /g and a pore volume of 0.60 mL/g.
- Co/Mo and P/Mo molar ratios are 0.42 and 0.27, respectively.
- Co/Mo and P/Mo molar ratios are 0.60 and 0, respectively.
- H DS selective hydrodesulfurization
- the catalysts in the selective hydrodesulfurization and finishing reactors Prior to its use, are sulfurized by treatment for 4 hours under a pressure of 3.4 MPa at 350°C, in contact with a charge consisting of 2% by weight of sulfur as dimethyldisulfide in n-heptane.
- the properties of the catalysts are presented in Table 1.
- the performances in the gasoline desulfurization process are presented in Table 2.
- the “average temperature” corresponds to the Weight Average Bed Temperature (WABT) according to the established Anglo-Saxon term, well known to those skilled in the art.
- WABT Weight Average Bed Temperature
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- Oil, Petroleum & Natural Gas (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Production Of Liquid Hydrocarbon Mixture For Refining Petroleum (AREA)
- Catalysts (AREA)
Abstract
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Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR2212556A FR3142487A1 (fr) | 2022-11-30 | 2022-11-30 | Procédé d’hydrodésulfuration de finition des essences mettant en œuvre un catalyseur à base de métaux du groupe VIB et VIII et du phosphore sur support alumine à faible surface spécifique |
| PCT/EP2023/082855 WO2024115277A1 (fr) | 2022-11-30 | 2023-11-23 | Procede d'hydrodesulfuration de finition des essences mettant en œuvre un catalyseur a base de metaux du groupe vib et viii et du phosphore sur support alumine a faible surface specifique |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP4627016A1 true EP4627016A1 (fr) | 2025-10-08 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP23810362.6A Pending EP4627016A1 (fr) | 2022-11-30 | 2023-11-23 | Procede d'hydrodesulfuration de finition des essences mettant en oeuvre un catalyseur a base de metaux du groupe vib et viii et du phosphore sur support alumine a faible surface specifique |
Country Status (5)
| Country | Link |
|---|---|
| EP (1) | EP4627016A1 (fr) |
| KR (1) | KR20250116102A (fr) |
| CN (1) | CN120283033A (fr) |
| FR (1) | FR3142487A1 (fr) |
| WO (1) | WO2024115277A1 (fr) |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2797639B1 (fr) | 1999-08-19 | 2001-09-21 | Inst Francais Du Petrole | Procede de production d'essences a faible teneur en soufre |
| FR2811328B1 (fr) | 2000-07-06 | 2002-08-23 | Inst Francais Du Petrole | Procede comprenant deux etapes d'hydrodesulfuration d'essence et une elimination intermediaire de l'h2s forme au cours de la premiere etape |
| FR2840315B1 (fr) | 2002-06-03 | 2004-08-20 | Inst Francais Du Petrole | Procede d'hydrodesulfuration de coupes contenant des composes soufres et des olefines en presence d'un catalyseur supporte comprenant des metaux des groupes viii et vib |
| FR2888583B1 (fr) * | 2005-07-18 | 2007-09-28 | Inst Francais Du Petrole | Nouveau procede de desulfuration d'essences olefiniques permettant de limiter la teneur en mercaptans |
| FR3014896B1 (fr) * | 2013-12-18 | 2018-07-27 | IFP Energies Nouvelles | Procede d'hydrodesulfuration de coupes d'hydrocarbures |
| FR3023184B1 (fr) | 2014-07-04 | 2019-12-27 | IFP Energies Nouvelles | Catalyseur d'hydrotraitement a densite de molybdene elevee et methode de preparation. |
| FR3116826B1 (fr) * | 2020-11-27 | 2023-11-03 | Ifp Energies Now | Procede d’hydrodesulfuration mettant en œuvre un catalyseur comprenant un support d’alumine flash |
| FR3116832B1 (fr) * | 2020-11-27 | 2023-11-03 | Ifp Energies Now | Procede d’hydrodesulfuration de finition en presence d’un catalyseur sur support meso-macroporeux |
| FR3122105B1 (fr) * | 2021-04-21 | 2023-11-24 | Ifp Energies Now | Catalyseur contenant du phosphore et du sodium et son utilisation dans un procede d’hydrodesulfuration |
-
2022
- 2022-11-30 FR FR2212556A patent/FR3142487A1/fr active Pending
-
2023
- 2023-11-23 CN CN202380082175.9A patent/CN120283033A/zh active Pending
- 2023-11-23 WO PCT/EP2023/082855 patent/WO2024115277A1/fr not_active Ceased
- 2023-11-23 EP EP23810362.6A patent/EP4627016A1/fr active Pending
- 2023-11-23 KR KR1020257021736A patent/KR20250116102A/ko active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| CN120283033A (zh) | 2025-07-08 |
| WO2024115277A1 (fr) | 2024-06-06 |
| FR3142487A1 (fr) | 2024-05-31 |
| KR20250116102A (ko) | 2025-07-31 |
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