Process for simultaneous hydrotreating and hydrodewaxing of hydrocarbons
AssigneeUnion Oil Company of California
InventorsJohn W. Ward, Timothy L. Carlson
Life of this patent
Estimating the term…
Abstract
Waxy shale oil feeds containing organonitrogen and/or organosulfur components are contacted with a catalyst comprising a Group VIB metal component on a support containing silicalite and a porous refractory oxide under conditions of elevated temperature and pressure and in the presence of hydrogen so as to simultaneously reduce its pour point and its organosulfur and/or organonitrogen content.
Claims102
In a process for catalytically dewaxing a hydrocarbon feedstock containing waxy paraffins by contact with a solid catalyst under conditions of elevated temperature and pressure, the improvement wherein said catalyst comprises a Group VIB metal component on a support comprising a porous refractory oxide in intimate admixture with an essentially Group IIIA metal-free crystalline silica molecular sieve having channels with apertures defined by ten membered rings of oxygen atoms.
A process for simultaneously hydrodewaxing and hydrotreating a waxy hydrocarbon feedstock having an undesirably high pour point and containing one or more contaminants selected from the group consisting of organosulfur compounds and organonitrogen compounds, which process comprises contacting the feedstock with a catalyst comprising a Group VIB metal component on a support comprising an intimate admixture of a porous refractory oxide and an essentially Group IIIA metal-free crystalline silica molecular sieve having channels with apertures defined by ten membered rings of oxygen atoms under conditions, including an elevated temperature and pressure and the presence of hydrogen, such that a hydrocarbon product containing substantially less of said contaminants and having a pour point substantially reduced in comparison to said feedstock is produced.
A process for hydrodewaxing a waxy hydrocarbon feedstock having an undesirably high pour point, which process comprises contacting said feedstock with a catalyst comprising a Group VIB metal component on a support comprising an intimate admixture of a porous refractory oxide and an essentially Group IIIA metal-free crystalline silica molecular sieve having channels with apertures defined by ten membered rings of oxygen atoms under conditions, including an elevated temperature and pressure and the presence of hydrogen, such that less than about 25%, by volume, of the components boiling above 750.degree. F. are converted to products boiling below 750.degree. F. and a product hydrocarbon is produced having a pour point substantially lower than said feedstock.
A process for treating a hydrocarbon feedstock containing a substantial proportion of organonitrogen components and having a pour point above about 50.degree. F., said process comprising (1) contacting said feedstock with a catalyst comprising one or more Group VIB metal components and one or more Group VIII metal components on a support comprising a dispersion of an organic-free silicalite containing no more than about 0.75 weight percent total metals, calculated as metals, in a porous refractory oxide selected from the group consisting of silica, alumina, thoria, beryllia, zirconica, magnesia, chromia, silica-alumina, silica-titania, silica-zirconia, silica-zirconia-titania, zirconia-titania, and combinations thereof, under conditions, including an elevated temperature between about 650.degree. and about 800.degree. F. and an elevated pressure and the presence of hydrogen, such that a product hydrocarbon of substantially lowered organonitrogen components content and of substantially lowered pour point is produced, and (2) recovering said product hydrocarbon.
A process for simultaneously hydrotreating and hydrodewaxing a hydrocarbon feedstock derived from shale oil, said feedstock containing organonitrogen compounds in a concentration above about 200 wppm, calculated as nitrogen, organosulfur compounds in a concentration above about 25 wppm, calculated as sulfur, and a pour point above about 50.degree. F., which process comprises:
- (1) contacting said feedstock with a hydroprocessing catalyst comprising one or more Group VIB metal components selected from the group consisting of molybdenum, tungsten, the oxides thereof, and the sulfides thereof, one or more Group VIII metal components selected from the group consisting of nickel, cobalt, iron, the oxides thereof, and the sulfides thereof, on a support consisting essentially of a porous refractory oxide and an organic-free crystalline silica molecular sieve containing less than about 0.75 weight percent Group IIIA metals, calculated as trioxides, and having intersecting channels having openings between about 5 and 6 Angstroms as defined by 10 membered rings of oxygen atoms under conditions of elevated temperature and pressure and the presence of hydrogen such that a product hydrocarbon is produced of substantially reduced organonitrogen and organosulfur content and of substantially reduced pour point in comparison to said feedstock and (2) recovering said product hydrocarbon.
A process for treating a deashed, dearsenated, essentially full boiling range shale oil having a pour point above about 50.degree. F. and containing more than about 1.50 weight percent organonitrogen compounds, calculated as nitrogen, and more than about 0.20 weight percent organosulfur compounds, calculated as sulfur, which process comprises:
- (1) contacting said shale oil with a catalyst comprising a Group VIII metal component and a Group VIB metal component on a porous refractory oxide support under conditions, including an elevated temperature and pressure and the presence of hydrogen, such that sufficient of said organonitrogen compounds are converted to ammonia and sufficient of said organosulfur compounds are converted to hydrogen sulfide such that a shale oil hydrotreated product is obtained containing about 200 to 3500 wppm organonitrogen compounds, calculated as nitrogen, and about 30 to about 200 wppm organosulfur compounds, calculated as sulfur;
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- (2) contacting said shale oil hydrotreated product with essentially all the gases obtained in step (1), including the unreacted hydrogen and produced ammonia and hydrogen sulfide, with a catalyst consisting essentially of one or more Group VIB metal components selected from the group consisting of molybdenum, tungsten, the oxides thereof and the sulfides thereof and one or more Group VIII metal components selected from the group consisting of nickel, cobalt, the oxides thereof, and the sulfides thereof on a support consisting essentially of (a) a porous refractory oxide comprising alumina and (b) an essentially organic-free silicalite containing less than about 0.75 weight percent of total metals, calculated as metals, said contacting being under conditions, including an elevated temperature and pressure, such that said shale oil hydrotreated product is converted into a shale oil hydrodewaxed product having a pour point below about 30.degree. F. and containing less than about 200 wppm of organonitrogen compounds, calculated as nitrogen, and less than about 25 wppm of organosulfur compounds, calculated as sulfur.
A process for upgrading a waxy hydrocarbon feedstock derived from shale oil, said feedstock containing organonitrogen components and organosulfur components and having a relatively high pour point, which process comprises:
- (1) hydrotreating said feedstock by contact with a sulfided catalyst comprising a Group VIII metal component and a Group VIB metal component on a porous refractory oxide support in the presence of hydrogen and under conditions reducing the organonitrogen content and the organosulfur content of the shale oil feedstock while increasing the pour point thereof;
- (2) contacting at an elevated temperature below about 800.degree. F. the entire effluent from step (1) with a catalyst comprising a Group VIII metal component and a Group VIB metal component on a support comprising a porous refractory oxide in intimate admixture with an essentially Group IIIA metal-free crystalline silica molecular sieve having channels with apertures defined by ten membered rings of oxygen atoms in the presence of hydrogen and under conditions further reducing the organonitrogen and organosulfur content while decreasing the pour point below that of said feedstock introduced into step (1);
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- (3) recovering a product hydrocarbon having a reduced pour point and containing a decreased concentration of organonitrogen and organosulfur components in comparison to said feedstock.
A process for treating a shale oil containing arsenic, ash, organosulfur compounds, and organonitrogen compounds and having a pour point above about 50.degree. F. comprising:
- (1) deashing said shale oil;
- (2) dearsenating the deashed shale oil recovered from step (1) by contacting said deashed shale oil with a sulfided catalyst comprising nickel and molybdenum components on a refractory oxide support in the presence of hydrogen and at elevated temperature and pressure;
- (3) hydrotreating the deashed-dearsenated shale oil recovered in step (2) by contacting said deashed-dearsenated shale oil with a catalyst comprising a Group VIB metal component and a Group VIII metal component on a porous refractory oxide in the presence of hydrogen and under conditions of elevated temperature and pressure;
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- (4) contacting the deashed-dearsenated-hydrotreated shale oil recovered from step (3) with a catalyst comprising a Group VIB metal and a Group VIII metal on a support comprising an intimate admixture of silicalite and a porous refractory oxide under conditions of elevated pressure and an elevated temperature no greater than about 800.degree. F. so as to reduce the organonitrogen and organosulfur contents of said deashed-dearsenated-hydrotreated shale oil and to reduce the pour point thereof.
A process for treating a waxy raffinate in the production of a lubricating oil, which process comprises contacting said waxy raffinate with a catalyst comprising a Group VIII metal component and a Group VIB metal component on a support comprising a refractory oxide in intimate admixture with an essentially Group IIIA metal-free crystalline silica molecular sieve having channels with apertures defined by ten membered rings of oxygen atoms, said contacting being in the presence of hydrogen and under conditions of elevated temperature and pressure such that the pour point of said raffinate is substantially reduced.
A process for treating a hydrocarbon feedstock derived from shale oil, said feedstock containing a JP-4 fraction consisting of essentially all components boiling below about 420.degree. F., said JP-4 fraction having a freeze point above -72.degree. F., which process comprises contacting said feedstock at an elevated temperature below about 800.degree. F. and at an elevated pressure and in the presence of hydrogen with a catalyst comprising a Group VIII metal component and a Group VIB metal component on a support comprising a porous refractory oxide in intimate admixture with silicalite, said contacting being such that a product hydrocarbon is obtained, the JP-4 fraction of which has a freeze point below -72.degree. F.
A process for treating a hydrocarbon feedstock derived from shale oil, said feedstock containing a diesel fraction boiling between about 300.degree. and 670.degree. F. and having a pour point above +5.degree. F., which process comprise contacting said feedstock at an elevated temperature below about 800.degree. F. and at an elevated pressure and in the presence of hydrogen with a catalyst comprising a Group VIII metal component and a Group VIB metal component on a support comprising a porous refractory oxide in intimate admixture with silicalite, said contacting being such that a product hydrocarbon is obtained, the diesel fraction thereof boiling between about 300.degree. and 670.degree. F. having a pour point below +5.degree. F.
A process for treating a hydrocarbon feedstock derived from shale oil, said feedstock containing a Jet A fraction consisting of components boiling between about 300.degree. and 520.degree. F., said Jet A fraction having a freeze point above -40.degree. F., which process comprises contacting said feedstock at an elevated temperature below about 800.degree. F. and at an elevated pressure and in the presence of hydrogen with a catalyst comprising a Group VIII metal component and a Group VIB metal component on a support comprising a porous refractory oxide in intimate admixture with silicalite, said contacting being such that a product hydrocarbon is obtained, the Jet A fraction thereof having a freeze point below -40.degree. F.
In a catalytic hydrocarbon dewaxing process, wherein a hydrocarbon feedstock is contacted with a catalyst under dewaxing conditions, the improvement wherein said catalyst comprises a Group VIB metal component on a support comprising an intimate admixture of a porous refractory oxide and a silica polymorph consisting essentially of crystalline silica.
A process for hydrodewaxing a hydrocarbon feedstock, which process comprises contacting said feedstock with a catalyst comprising a hydrogenation component comprising a Group VIB metal component and a Group VIII metal component on a support comprising an intimate admixture of a porous refractory oxide and silicalite under conditions, including elevated temperature and pressure and the presence of hydrogen, sufficient to hydrodewax said hydrocarbon feedstock, wherein at least a portion of said hydrogenation component is associated with said porous refractory oxide.
A hydroprocessing process which comprises contacting a hydrocarbonaceous feed at hydrocarbon hydroprocessing conditions with a catalyst comprising an effective amount of a crystalline silica zeolite having uniform pore diameters, a hydrogenation component and a non-zeolitic inorganic oxide support, said hydrogenation component being associated with said support, wherein said hydroprocessing comprises simultaneous hydrodesulfurization and pour point reduction.
A hydroprocessing process which comprises contacting a hydrocarbonaceous feed at hydrocarbon hydroprocessing conditions with a catalyst comprising an effective amount of a crystalline silica zeolite having uniform pore diameters, a hydrogenation component and a non-zeolitic inorganic oxide support.
Dependencies are inferred from the claim text.