22 results about "Hydrodenitrogenation" patented technology

The invention discloses a residual oil hydrotreating system and a residual oil hydrotreating process control method, and the system comprises a data acquisition device, a data processing device, a control device, and a plurality of reactors connected in series. The reactors comprise a hydrogenation protective agent reactor, a hydrodemetallization agent reactor, a hydrodesulfurization agent reactor and a hydrodenitrogenation carbon residue removal agent reactor; each reactor comprises a plurality of reaction tubes which are connected in parallel; the data acquisition device acquires working condition information; the data processing device comprises a strategy generation unit and an instruction generation unit; the strategy generation unit is used for generating a catalyst grading strategy; the instruction generation unit is used for generating a valve control instruction. On-line adjustment of the grading of the catalyst can be carried out only by controlling the opening and closing number of the inlet and outlet valves of the reaction tube in the reactor; therefore, the economic loss caused by shutdown is reduced.

The application discloses a preparation method of a hydroresid catalyst, and comprises the following contents: (1) preparing a boron-modified alumina carrier A; (2) immersing the boron-modified alumina carrier A into a propylene oxide solution, treating the carrier in a sealed pressure-resistant container at 60-100 DEG C for 1-4 hours, then increasing the temperature to 110-180 DEG C and treating the carrier for 2-6 hours, and then drying the carrier after the treatment to obtain an alumina carrier B; (3) ultrasonic treating the alumina carrier B immersed in a boric acid solution, drying the carrier after the treatment, preparing an alumina carrier C, and then loading a hydrogenation active component to obtain the hydroresid catalyst. The hydroresid catalyst has suitable B acid and L acid, the surface particle morphology is worm, the pore is open, and the catalyst is beneficial to the diffusion of reactant molecules to the inside of the catalyst. The catalyst has high hydrodesulfurization, hydrodenitrogenation and hydroresid activity when being used in a heavy oil and residual oil hydroprocessing process.

This invention discloses an alumina material, a hydrogenation catalyst, and its preparation method. The alumina material of this invention is a mixed phase of γ-Al₂O₃ and AlOOH, wherein the AlOOH morphology is worm-like and grows in situ on the outer surface of the γ-Al₂O₃ support, with worm-like AlOOH crystals covering 85%-100% of the outer surface of the γ-Al₂O₃ support. The preparation method of the alumina material of this invention includes the following steps: The γ-Al₂O₃ support is placed in a propylene oxide solution and subjected to hydrothermal treatment under sealed conditions: first, hydrothermal treatment at 60-100℃ for 1-4 hours, then hydrothermal treatment at 110-180℃, preferably 120-160℃, for 2-6 hours; the treated material is then dried to obtain the alumina material. The alumina material exhibits a worm-like surface particle morphology and a high content of 8-15nm pores. This alumina material as a support has broad application prospects in heterogeneous catalyst reactions, especially in the field of heavy oil hydrogenation. The hydrogenation catalyst prepared using this support has high hydrodenitrification and desulfurization activity.

This invention discloses a hydrodenitrification catalyst for residue oil, its preparation method, and its application. The catalyst includes a support and a second active metal component. The support comprises a first active metal phosphide, a first active metal carbide, and alumina. The molar ratio of the first active metal phosphide to the first active metal carbide, calculated as the first active metal, is 1:0.20–0.40. This hydrodenitrification catalyst exhibits good macromolecular diffusion properties, strong denitrification capacity, strong metal-containing capacity, and good resistance to coking. This hydrodenitrification catalyst is particularly suitable for residue oil hydrodenitrification processes, demonstrating excellent demetallization and denitrification activity as well as good activity stability.

A hydrodesulfurization or hydrodenitrogenation catalyst, the hydrodesulfurization or hydrodenitrogenation catalyst comprising an amount of a composition, the composition comprising: a population of crystalline transition metal dichalcogenide platelets having the empirical formula MC2, wherein M is a transition metal and C is a chalcogenide, each of the platelets comprising a region of 2H phase and / or a region of 3R phase, and each of the platelets being characterized as comprising a single atomic layer to a few atomic layers.

The invention discloses a hydrofining catalyst and a preparation method thereof, the hydrofining catalyst comprises transition metal phosphide and alumina, the transition metal phosphide is WP and Ni2P; the dispersity of the transition metal phosphide is 24%-55%, and the average particle diameter of the transition metal phosphide is 4-9 nm. The preparation method comprises the following steps: (1) adding an Al-containing solution into a gel forming reaction tank, adjusting the pH value to an initial reaction value, and then carrying out a parallel flow gel forming reaction on a W, Ni and Al-containing solution and a sodium phosphate solution to obtain slurry; (2) slurry is divided into slurry A and slurry B, and the slurry B is aged; and (3) mixing the slurry A, the aged slurry B and a phosphate compound, adding a W-containing solution in the aging process, after aging is finished, carrying out solid-liquid separation to obtain a solid-phase material, drying, molding, washing, drying, roasting and reducing to obtain the catalyst. The catalyst provided by the invention has high hydrodesulfurization and hydrodenitrogenation reaction performance, and is suitable for being applied to ultra-deep hydrodesulfurization and denitrogenation reactions of diesel fractions.

The invention discloses a CoW hydrogenation catalyst with low metal content, which comprises a carrier and active metal components loaded on the carrier, and the active metal components comprise a main active metal component W and an auxiliary active metal component Co; the total mass of the hydrogenation catalyst is 100%, the content of the active metal component is 3 wt%-15 wt% in terms of oxide, and the content of the carrier is 85 wt%-96 wt%. Compared with the prior art, the content of CoW in the hydrogenation catalyst is low, the hydrogenation catalyst still has excellent catalytic activity on the basis of low metal content, the hydrodesulfurization rate of the catalyst exceeds 90% and the hydrodenitrification rate exceeds 60% at the temperature of 380 DEG C and when the content of active metal is 4.5 wt%, and the content of sulfur and nitrogen in a reaction product is effectively reduced.

The invention relates to the technical field of hydrogenation catalysts, and discloses a gasoline selective hydrogenation catalyst and a preparation method and application thereof. The preparation method of the gasoline selective hydrogenation catalyst comprises the following steps: (1) loading alkali metal and / or alkaline earth metal onto a carrier to obtain a modified carrier; (2) loading nickel, at least part of molybdenum and a first organic matter onto the modified carrier by adopting an impregnation method, and then carrying out carbonization treatment to obtain a carbonized product; (3) loading cobalt, at least part of molybdenum and a second organic matter onto the carbonized product by adopting an impregnation method, and then carrying out hydrothermal treatment and first post-treatment to obtain a catalyst precursor; and (4) loading a third organic matter on the catalyst precursor by adopting an impregnation method, and then carrying out hydrogenolysis post-treatment. The catalyst prepared by the method has good competition and selection among hydrodenitrogenation, olefin saturation and aromatic hydrocarbon hydrogenation, and the aromatic hydrocarbon selectivity and the stability of the catalyst are improved while deep denitrification is performed.

The present application provides a residue hydrodenitrogenation catalyst, a preparation method and application thereof. The catalyst comprises a carrier and an active metal component, the carrier comprises modified Y molecular sieve and alumina, the modified Y molecular sieve is small crystal grain mesoporous modified Y molecular sieve, and the properties are as follows: the crystal grain size is 500 nm or less, the molar ratio of silicon oxide to alumina is 8-55, the specific surface area is 640-800 m 2 / g, the cell parameter is 2.433-2.460 nm, and the average pore size is 10-30 nm. The catalyst is used in a residue hydrodenitrogenation process, and can improve the denitrogenation activity and stability.

This invention discloses a method for preparing a catalyst for hydrodenitrification and decarbonization of heavy oil, comprising the following steps: (1) mixing boehmite powder, boron-containing micron-sized spherical activated carbon, and water into a slurry, then separating the solid and liquid phases, drying the solid phase material, then kneading, molding, drying, and calcining under an inert atmosphere to obtain an alumina support precursor, and then loading boron to obtain a boron-modified alumina support precursor; (2) adding the boron-modified alumina support precursor and propylene oxide aqueous solution into a closed high-pressure reactor, reacting at 60-100℃ for 1-4 hours, then raising the temperature to 110-180℃ for 2-6 hours, drying, and calcining to obtain an alumina support, and then loading hydrogenation active components to obtain the catalyst product. The catalyst prepared by this method has a worm-like particle morphology on its surface, and the pores formed by the accumulation of worm-like particles are open. The catalyst also has suitable Brønsted acid and Lewis acid content. This catalyst is suitable for hydrodenitrification and decarbonization reactions of inferior heavy oil.

The invention discloses a heavy distillate oil hydrogenation catalyst preparation method, which comprises: (1) adding an aluminum source into a gel forming reaction tank, adjusting the pH value to 4.5-6.0 by using a first phosphorus source, alternately carrying out a parallel flow gel forming reaction on an aluminum tungsten solution, the first phosphorus source and ammonia water, adding one part of a rare earth salt solution and one part of a nickel salt solution at the beginning of each alternation, a gel forming material is obtained; (2) dividing the gelling material into a first gelling material and a second gelling material, and aging the second gelling material to obtain an aged second gelling material; and (3) mixing the first gelling material, the aged second gelling material and a second phosphorus source, aging, adding a tungsten source in the aging process, after the aging is finished, carrying out solid-liquid separation to obtain a solid-phase material, drying, molding, washing, drying, roasting and reducing to obtain the catalyst. The catalyst provided by the invention has high hydrodesulfurization and hydrodenitrogenation reaction performance, and is suitable for being applied to hydrodesulfurization and hydrodenitrogenation reactions of heavy distillate oil.

The invention provides a preparation method and application of a hydrodenitrification catalyst, and the preparation method comprises the following steps: step 1, mixing an active component precursor, a dispersant and thiosulfate to prepare an impregnation liquid; and 2, mixing a carrier with the impregnation liquid, carrying out pressurization treatment, drying, and roasting to obtain the hydrodenitrification catalyst. The dispersion degree of metal active components of the catalyst is promoted by adding the dispersing agent, the sulfuration degree of the catalyst can be improved by adding the thiosulfate, sulfur vacancies of the catalyst are increased, then active sites for adsorbing reactant macromolecules are increased, and the hydrodenitrogenation performance of the catalyst is improved.

The present disclosure relates generally to processes for handling renewable hydrocarbon feeds and conventional hydrocarbon feeds. One aspect of the disclosure provides a process for co-processing a renewable feed and a petroleum feed, the process comprising: hydrotreating the petroleum feed in a first reaction one, wherein the hydrotreating of the petroleum feed comprises one or more of hydrodesulfurization, hydrodenitrogenation, hydrodemetallization, isomerization, hydrogenation of olefins, and hydrocracking, to form a first reaction zone effluent; conducting the first reaction zone effluent to a second reaction zone; and in the second reaction zone hydrotreating a combination of the first reaction zone effluent and the renewable feed, wherein the hydrotreating of the combination comprises one or more of hydrodeoxygenation, decarboxylation, decarbonylation, isomerization and hydrogenation of olefins of the renewable feed, to form a second reaction zone effluent.

The invention relates to the technical field of oil refining catalysts, and discloses an oil refining catalyst and a preparation method thereof. According to the catalyst, aluminum oxide is used as a main carrier, and a hierarchical porous structure with micropores, mesopores and macropores is obtained through reasonable forming and heat treatment processes, so that the pore size distribution is more balanced. The carrier has relatively high specific surface area and total pore volume, and also shows good hydrothermal stability. It is found through characterization that the surface of the carrier contains a proper amount of nitrogen element, the nitrogen element exists in a stable chemical state, and favorable conditions are provided for uniform dispersion of active metal components. When the catalyst is applied to hydrodesulfurization and hydrodenitrification reactions, the diffusion efficiency of reactants and the utilization rate of metal active sites can be remarkably improved, and the catalyst shows relatively high removal rate and long-term stability.

The invention provides a method and a device for predicting the nitrogen content of refined wax oil. The method comprises the following steps: obtaining raw material wax oil nitrogen content, raw material wax oil sulfur content, raw material distillation range and operation parameters involved in a refined wax oil generation process; inputting the raw material wax oil nitrogen content, the raw material wax oil sulfur content, the raw material distillation range and the operation parameters into a pre-established hydrodenitrification kinetic model to obtain the removed nitrogen content; and subtracting the removed nitrogen content from the nitrogen content of the raw material wax oil to obtain the nitrogen content of the refined wax oil. Wherein the hydrodenitrification kinetic model is constructed through the following operations: obtaining an influence expression of the sulfur content of a raw material on a denitrification reaction; obtaining an influence expression of a raw material distillation range on a nitride removal reaction; and obtaining a nitride removal expression according to the influence expression of the sulfur content of the raw material on the denitrification reaction and the influence expression of the distillation range of the raw material on the nitride removal reaction. The problem that a traditional method is insufficient in adaptability to raw materials is solved.

This invention provides a method for hydrotreating inferior oil. The method employs a fixed-bed hydrotreating process. In the presence of hydrogen, the inferior oil is sequentially contacted with at least one hydrodesulfurization catalyst and at least one hydrodenitrification catalyst to undergo a hydrotreating reaction, yielding hydrotreated oil. The hydrodesulfurization catalyst comprises a support and an active component, preferably including an additive. The support comprises a silicon-modified nickel-aluminum alloy, and the active component is an organomolybdenum, preferably alkyl dithiophosphate molybdenum and / or alkyl dithiocarbamate molybdenum, with an additive being organozinc. The hydrodenitrification catalyst also comprises a support and an active component. The support comprises a silicon-modified nickel-aluminum alloy, and the active component includes an organomolybdenum, preferably alkyl dithiophosphate molybdenum and / or alkyl dithiocarbamate molybdenum. Preferably, the hydrodenitrification catalyst includes an additive organogallium. This hydrotreating method exhibits strong desulfurization and denitrification effects for inferior secondary processed oils.

In accordance with one or more embodiments of the present disclosure, a process for treating a diesel feedstock to convert diesel to component-paraffins includes hydrodesulfurizing and hydrodenitrogenizing the diesel feedstock to reduce a sulfur content of the diesel feedstock and a nitrogen content of the diesel feedstock; hydrocracking the hydrodesulfurized and hydrodenitrogenized diesel feedstock over a metal-containing diesel hydrocracking catalyst comprising at least one zeolite to produce a hydrocrackate fraction; separating the hydrocrackate fraction into a first stream enriched in n-paraffins and a second stream enriched in iso-paraffins and naphthenes; and reverse isomerizing at least a portion of the second stream over an isomerization catalyst to convert at least a portion of the iso-paraffins to n-paraffins, producing a reverse isomerate fraction.

The application discloses a kind of hydrodenitrogenation catalyst and its preparation method and application.The catalyst includes carrier and active component, the active component includes Mo and Zn and / or Cu, the content of Mo is 6%-16% based on the total weight of catalyst, the content of Zn and / or Cu is 0.5%-4.5%, the mass ratio of Mo and S is above 1.5.The hydrodenitrogenation catalyst of the application not only has good hydrodenitrogenation activity when processing low-sulfur heavy residual oil feedstock, but also has good activity stability, and is particularly suitable for processing ebullated bed hydrogenation tail oil.

The application provides a hydrodenitrogenation catalyst and a preparation method thereof. The hydrodenitrogenation catalyst comprises a carrier and an active component, the carrier comprises a modified nickel-aluminum alloy, and the active component comprises organic molybdenum, preferably molybdenum alkyl dithiophosphate and / or molybdenum alkyl dithiocarbamate; preferably, the hydrodenitrogenation catalyst comprises an auxiliary organic gallium. The hydrodenitrogenation catalyst has strong hydro-saturation capacity and hydrodenitrogenation capacity for poor raw materials with high nitrogen content and high aromatic content.

The invention relates to the technical field of coal tar hydrogenation, and particularly discloses a deep denitrification method for preparing light fuel oil by coal tar hydrogenation. The method comprises the following steps: carrying out filtration, dehydration, demetallization and deasphaltene pretreatment on coal tar, and carrying out a first-stage hydrogenation reaction in the presence of a conventional catalyst; feeding the mixture into a second hydrogenation reactor filled with an N-P co-doped ordered mesoporous carbon loaded Zr < 3 + > doped Ni2P catalyst, and carrying out hydrocracking and oxygen introduction assisted in-situ regeneration; and finally, carrying out deep adsorption through a nitric acid modified ZSM-5 and aluminum oxide composite adsorbent to obtain the light fuel oil. According to the invention, a multi-stage synergistic process of step-by-step impregnation and in-situ regeneration of the catalyst and B-Si dual auxiliaries and deep denitrification of the composite adsorbent is adopted, so that the hydrodenitrification activity and the catalyst stability are enhanced, the total nitrogen content of the product is effectively reduced, and the yield of light fractions of gasoline and diesel oil is improved. The method is high in denitrification depth, long in catalyst service life, capable of achieving efficient resource utilization of coal tar and suitable for industrial production.

The invention discloses a method for preparing n-propyl cyclohexane by catalyzing hydrodenitrogenation of quinoline. According to the method, the n-propyl cyclohexane is prepared by catalyzing a 1, 4-dioxane solution of quinoline by using a nano functional catalyst x%-Ni-y%-Mo-z%-WOx at m%-GO-SAPO-34 through a one-step hydrodenitrogenation reaction. According to the catalyst, a gel method and an impregnation method are combined, non-noble metals Ni, Mo and W are ingeniously loaded on SAPO-34 doped with sulfuric acid sulfonated graphene, a functional nano-catalyst is formed, and a gas-phase hydrodenitrification experiment shows a good effect. Under optimized conditions, the highest selectivity of the main product n-propyl cyclohexane can reach 81.35%, and at the moment, the conversion rate of quinoline reaches up to 99.95%, namely the yield of the main product n-propyl cyclohexane reaches up to 81.31%. The method is short in process route, simple in reaction equipment and operation method, mild in reaction condition, short in reaction time and low in energy consumption, and the catalyst is simple and controllable in synthesis, low in cost, good in stability and capable of being recycled. The main product of the method is pure and easy to separate and purify, the expected economic benefit is very considerable, and the method can be used for a petroleum hydrogenation refining process and well achieves the effect of one-step hydrogenation nitrogen removal of quinoline.

This invention discloses a hydrodenitrification catalyst, its preparation method, and its application, comprising the following steps: (1) AlPO4-5 phosphorus aluminum molecular sieve with a crystal size of less than 2 μm and alumina are sequentially added to deionized water, and a carrier raw material slurry is obtained by ultrasonic emulsification. The carrier raw material slurry is filtered, dried, and ground to obtain a carrier raw material powder. The carrier raw material powder is mixed evenly with a molding aid, and then extruded, dried, and calcined to obtain a catalyst support; (2) Metal salts containing zinc, nickel, and tungsten elements are dissolved in deionized water to obtain a metal impregnation solution. The catalyst support is impregnated using an equal-volume impregnation method, and then cured, dried, and calcined to obtain a hydrodenitrification catalyst. The preparation method of this invention can improve the utilization efficiency of AlPO4-5 phosphorus aluminum molecular sieve, inhibit the formation of nickel-aluminum spinel inert substances, promote the formation of a highly active hydrogenation phase by the active metal, improve the utilization efficiency of the active metal Ni, and thus improve the hydrogenation activity of the catalyst.