162 results about "Hydrodeoxygenation" patented technology

The invention relates to the technical field of biological aviation kerosene, and discloses a process for preparing biological aviation kerosene from waste grease. The method comprises the following steps: introducing waste oil into a hydrofining reactor, introducing hydrogen, carrying out a hydrodeoxygenation reaction under the catalysis of a hydrogenation catalyst, carrying out a reaction on the obtained hydrodeoxygenated oil in an isomerization pour point depressing reactor, and finally carrying out isomerization hot high-pressure separation treatment, isomerization cold high-pressure separation treatment and rectification tower segmentation to obtain the biological aviation kerosene. The specific surface area of a carbon matrix of the hydrogenation catalyst is large, the void structure is rich, a large number of Ni-Mo-P active catalytic centers can be exposed, precious metals such as platinum and ruthenium do not need to be added, the hydrodeoxygenation reaction efficiency of waste oil and fat is remarkably improved, the mass fraction of branched paraffin and cycloparaffin in biological aviation fuel is high, and the combustion performance is better.

Methods and systems for converting a renewable fuel intermediate composition to finished transportation fuel are provided herein. In some examples, a renewable fuel intermediate composition is flowed over a first catalyst in a first reaction zone to generate a saturated, hydrodeoxygenated product. A liquid portion of the renewable fuel intermediate composition may be characterized as having more than about 70 wt % of the oxygen being within ketone groups. The saturated, hydrodeoxygenated product may be flowed over a second fixed-bed catalyst in a second reaction zone to generate a product including the finished transportation fuel.

The invention belongs to the field of biofuel preparation through grease hydrogenation, and provides a catalyst for biofuel preparation through waste grease one-step hydrogenation and a preparation method of the catalyst. The catalyst is a non-supported NixMoyWz-kHY catalyst, and the preparation method of the catalyst comprises the following steps: uniformly mixing a nickel source, a molybdenum source and a tungsten source according to a certain proportion, adding deionized water and a reaction aid ethylene glycol, dissolving, heating, stirring, adding an ammonia water-ethanolamine mixed solution, complexing, steaming until the pH value of the solution is 7-8, and filtering to obtain the catalyst. And adding a certain amount of HY molecular sieve powder, methyl cellulose (MC) and citric acid into the solution, filtering the reaction solution, drying the filter cake at 120 DEG C, performing extrusion molding, and roasting to obtain the catalyst. The catalyst provided by the invention effectively solves the problems of high oxygen content, difficulty in deep isomerization and the like in the waste oil and fat, has the functions of hydrodeoxygenation, cracking and isomerization at the same time, and realizes one-step conversion of the waste oil and fat into biological aviation kerosene and biodiesel. Besides, the non-supported catalyst adopted by the invention has high-activity center density, the problems of aging and shedding of the carrier are not needed to be worried about, and the preparation method of the catalyst is simple, environment-friendly and pollution-free, and meets the requirements of industrial preparation.

The application discloses a method for preparing a hydrogenation deoxidation intermediate by using conjugated fatty acids and application thereof, and belongs to the technical field of oil production biofuel. The method comprises the following steps: (1) subjecting conjugated fatty acids and a dienophilic monomer to a Diels-Alder addition reaction to obtain an addition product; and (2) removing unreacted raw materials from the addition product, so that the hydrogenation deoxidation intermediate is obtained. The method breaks the traditional idea of deoxidation first and isomerization later, and instead adopts the idea of "structure modification first and hydrogenation deoxidation later" to prepare the hydrogenation deoxidation intermediate, so that the hydrogenation isomerization process can be omitted, the generation of cracking products is reduced, the content of isomerization products in the biodiesel is significantly improved, and higher-quality biofuel is obtained.

The invention belongs to the technical field of catalysts, and particularly discloses a hydrodeoxygenation catalyst and a preparation method and application thereof. The catalyst contains a silicon-zirconium composite oxide carrier and a CuCo alloy loaded on the carrier, the molar ratio of silicon to zirconium in the silicon-zirconium composite oxide is (1-5): 1. The preparation method comprises the following steps: 1) preparing a precursor containing copper, cobalt, silicon and zirconium by adopting a sol-gel method; 2) roasting the precursor to obtain a copper oxide and a cobalt oxide which take the silicon-zirconium composite oxide as a carrier; and 3) carrying out reduction treatment on the material obtained in the step 2) to obtain the catalyst. The catalyst provided by the invention has high activity and alkane selectivity in hydrodeoxygenation reactions of various aldehyde ketone condensates, and can be used for hydrodeoxygenation reactions of aldehyde ketone condensation mixtures to produce aviation fuels.

Disclosed herein is a metal oxide aerogel catalyst for hydrogenation and / or hydrodeoxygenation, a method for preparing the same, and a method for hydrogenation and / or hydrodeoxygenation using the same. The catalyst consists of a metal and an oxide thereof, and the catalyst is in a form of an aerogel produced by supercritical drying. The catalyst has an effect of providing high hydrogenation and / or hydrodeoxygenation efficiency of an oxygen-containing compound.

Disclosed in the present invention are a cascade reaction device and method for preparing aviation fuel by means of photoelectrocatalytic conversion of lignin. The method comprises: placing lignin in a pretreatment reaction chamber filled with an alkaline solution, so that the lignin is fully dissolved; opening valves to enable a pretreated reaction liquid to flow into an anode chamber in a photoelectrocatalytic reaction chamber; using solar energy to drive a photoelectrocatalytic reaction at an anode; after sufficient reaction, enabling the reaction liquid in the anode chamber to flow into a temporary storage chamber, and subsequently, using a pump to transfer the reaction liquid in the temporary storage chamber into a cathode chamber; and after sufficient reaction, introducing the reaction liquid in the cathode chamber into a high-pressure reaction chamber by means of a pump, and enabling hydrogen generated in the cathode chamber to flow into a gas cylinder by means of a pipe for collection, so as to be supplied to the high-pressure reaction chamber, wherein the reaction liquid undergoes a hydrodeoxygenation reaction under the action of a catalyst in the high-pressure reaction chamber, and after sufficient reaction, the aviation fuel can be obtained. The present invention achieves an integrated cascade reaction for solar-driven conversion of lignin into aviation fuel.

The invention discloses a method for preparing SAF through continuous hydrogenation of a bio-based aviation oil precursor and a hydrogenation reactor, and belongs to the technical field of preparation of sustainable aviation oil. The hydrogenation reactor comprises a dispersion kettle, a first-stage hydrogenation reaction kettle, a second-stage hydrogenation reaction kettle, a filter, a reaction product cooler, a split-phase tank and a rectifying tower which are sequentially connected in series; the method comprises the following steps: mixing an aviation oil precursor, a supplementary catalyst and a hydrocarbon solvent in a dispersion kettle to obtain a reaction solution, then conveying the reaction solution to a primary hydrogenation reaction kettle for hydrogenation saturation and hydrodeoxygenation reaction, conveying part of unreacted reaction solution to a secondary hydrogenation reaction kettle for hydrogenation saturation and hydrodeoxygenation reaction, and then outputting a reaction product, sequentially passing through a filter and a reaction product cooler to enter a split-phase tank, and separating to obtain an SAF crude product; and inputting the SAF crude product into a rectifying tower, and separating to obtain an SAF product. The production process is continuous, the product quality is stable, and the method is suitable for large-scale production of sustainable aviation oil by hydrogenation of a condensation body prepared from a bio-based platform compound.

The present invention describes a method for treating a feedstock obtained from a renewable source in two steps using, in a hydrotreating step, a specific hydrodeoxygenation catalyst comprising at least one metal from group VIII, in combination with at least one metal from group VIB of the periodic table, the molar ratio between the group VIII elements and the group VIB elements being between 0.02 and 0.2, at least one organic additive and an oxide support comprising at least alumina, followed by a step of gas / liquid separation of the effluent obtained from the hydrotreating and then a hydroconversion step, in order to produce at least one gas oil fraction.

The application discloses HZSM-5 molecular sieve, a preparation method and application thereof, and belongs to the field of molecular sieve catalysts. The HZSM-5 molecular sieve comprises a flaky HZSM-5 molecular sieve base body and platinum nano-particles loaded on the flaky HZSM-5 molecular sieve base body; and the average thickness of the flaky HZSM-5 molecular sieve base body is 50-100 nm. The flaky HZSM-5 molecular sieve base body can provide acid centers, the platinum nano-particles can provide hydrogenation centers, and the two can cooperate to achieve good catalytic activity; and the flaky HZSM-5 molecular sieve base body has a relatively thin thickness, i.e. a relatively short b-axis channel length, which is not only beneficial to material diffusion and transmission, but also can greatly reduce the case that intermediate products contact acid sites to cause side reactions, and therefore can provide higher product selectivity. In particular, the HZSM-5 molecular sieve has a good application prospect in catalyzing bio-oil hydrodeoxygenation.

The invention provides a metal-heteropolyacid catalyst confined to a molecular sieve as well as a preparation method and hydrodeoxygenation application of the metal-heteropolyacid catalyst. The catalyst takes a spherical pure silicon molecular sieve with the particle size of 2-3mm as a carrier, and transition metal and heteropoly acid active components are supported in a pore channel in a limited range; the mass ratio of the heteropoly acid to the metal is (10-50): 1. According to the invention, an organic amine bridging strategy is adopted to construct near double active sites, that is, organic amine molecules in heteropolyacid organic amine salt are used as a guiding anchoring agent, and a transition metal precursor is accurately anchored near heteropolyacid. After roasting, a concerted catalysis center in which a metal hydrogenation site and a heteropolyacid deoxidation site are closely close on the nanoscale is successfully constructed in a confinement space of the molecular sieve, and the mass transfer efficiency and the step coupling effect in a hydrodeoxygenation multi-step cascade reaction are improved. When the weight hourly space velocity is 2 g / gcat. / h, the temperature is 150-250 DEG C and the pressure is 0.5-2 MPa, the conversion rate of the oxygen-enriched phenolic compound can be greater than or equal to 94%, and the yield of cycloalkane can be greater than or equal to 90%.

The invention is applicable to the technical field of biomass energy catalysis and conversion, and provides a high-activity and high-stability nickel-cobalt alloy catalyst and a synthesis method and application thereof, and the synthesis method comprises the following steps: preparing S-1 zeolite; the preparation method comprises the following steps: mixing S-1 zeolite with an aqueous solution of Ni (NO3) 2.6 H2O and an aqueous solution of Co (NO3) 2.6 H2O for dipping, placing the mixture in a tetrapropylammonium hydroxide solution for hydro-thermal treatment, and performing static calcination to obtain a NixCoyO at S-1 nanocrystal; mixing the NixCoyO (at) S-1 nanocrystal with polymers P123, F127, dopamine hydrochloride and 1, 3, 5-trimethylbenzene, performing ultrasonic dispersion in a mixed solvent of water and ethanol, adding ammonia water for reaction, and collecting NixCoyO (at) S-1 (at) mPDA; and carrying out carbonization and reduction on the NixCoyO (at) S-1 (at) mPDA to obtain the NixCoy (at) S-1 (at) mC catalyst. The prepared catalyst has excellent hydrodeoxygenation performance, vanillin can be efficiently converted into 2-methoxy-4-methylphenol (MMP) under mild conditions, and the yield exceeds 94%.

The invention discloses a preparation method of a catalyst for producing biological aviation kerosene by using high alcohol as a raw material and adopting a slurry reactor. The preparation method comprises the following steps: (1) respectively dissolving a nickel source and an organic amine source in methanol; slowly dripping the methanol solution of the organic amine source into the methanol solution of the nickel source under stirring; after dropwise adding, heating and carrying out reflux reaction for 30-90 minutes; filtering while hot, washing with methanol, collecting solid, and drying in vacuum to obtain the organic nickel catalyst. (2) respectively acidifying aqueous solutions of an organic amine source and a molybdenum source with diluted hydrochloric acid until the pH is 2-4; slowly dripping the acidified organic amine source into the acidified molybdenum source under stirring; after dropwise adding, stirring and reacting for 30-90 minutes; filtering, washing, collecting solids, and drying in vacuum to obtain the organic molybdenum catalyst. And (3) compounding the organic nickel catalyst and the organic molybdenum catalyst according to the mass ratio of 1: (1-10) to obtain the catalyst. The catalyst is simple in preparation process and low in energy consumption, and has high catalytic activity and high hydrodeoxygenation selectivity when being used for producing biological aviation kerosene by using high-carbon alcohol as a raw material and adopting a slurry reactor.

The invention provides a grease hydrodeoxygenation catalyst and a preparation method and application thereof, the preparation method comprises the following steps: mixing an aluminum-containing inorganic porous material, an acidic solution, an extrusion aid, a magnesium salt and a nickel salt, then carrying out extrusion molding to obtain a carrier precursor, and drying and roasting the carrier precursor to obtain a hydrodeoxygenation composite carrier; by taking the total weight of the carrier as 100%, the content of the magnesium element is 0.5-10%, and the content of the nickel element is 0.3-2%; dipping the hydrodeoxygenation composite carrier with a dipping solution containing active metal, and then drying and roasting to obtain the grease hydrodeoxygenation catalyst. When the hydrodeoxygenation composite carrier is prepared, magnesium salt and nickel salt are combined, and the hydrodeoxygenation composite carrier with a nickel-doped magnesium aluminate spinel structure can be obtained. The hydrodeoxygenation composite carrier has good hydrothermal stability and mechanical strength. The grease hydrodeoxygenation catalyst prepared by loading an active metal component on the hydrodeoxygenation composite carrier is stable in deoxygenation activity and excellent in deoxygenation effect.

The invention belongs to the field of catalysis, and provides an Nb-based composite oxide supported metal catalyst, a preparation method and an application of the Nb-based composite oxide supported metal catalyst in preparation of aviation oil through hydrodeoxygenation. The catalyst comprises a dual carrier of gamma-Al2O3 and Nb2O5 (or NbOPO4), and one or more hydrogenation active metals. The hydrodeoxygenation catalyst provided by the invention has good acidity and hydrogenation performance under the interaction of the two carriers, and the acidity and hydrogenation performance are proved to be superior to those of an original single-carrier catalyst through characterization; the performance of the catalyst in hydrodeoxygenation of a biomass derivative aldol condensation product (a long-chain oxygen-containing compound) to prepare aviation oil is far superior to that of a single-carrier catalyst with the same metal loading capacity.

Method to produce an upgraded oil using a lignin-rich feedstock, said method comprises the following steps: - providing a lignin-rich feedstock, wherein said lignin-rich feedstock comprises more than 60 wt% of lignin-based compounds obtained from delignification of biomass, where said lignin-based compounds are selected from the group consisting of: lignin-derived monomers, lignin-derived dimers, lignin-derived oligomers and combinations thereof; - providing an acidic composition having a pH of less than 1, said acidic composition comprising:  an acid selected from the group consisting of: sulfuric acid; an alkylsulfonic acid; and an arylsulfonic acid; and  an alcohol selected from the group consisting of C1-C8 linear alcohol and C3-C8 branched alcohol and mixtures thereof; - combining said lignin-rich feedstock with said acidic composition into a reaction mixture; - heating up said mixture to a temperature ranging from 25oC to 120oC; and - allowing sufficient time of reaction to convert at least a portion of said lignin-derived material into said at least one esterified lignin derivative; - separating said at least one esterified lignin derivative from said acidic composition; - performing a hydrodeoxygenation reaction on said at least one esterified lignin derivative, wherein the hydrodeoxygenation reaction is carried out in the presence of a hydrogen-rich source at a temperature ranging from 250oC to 400oC under a H2 pressure ranging from 15 to 50 bar, more preferably 35 bar, in the presence of a catalyst adapted for HDO reactions, for a period of time sufficient to result in an upgraded oil having a TAN of about 2.5 mg KOH / g and viscosity of 3.4 cP.

A method for hydrotreating a biorenewable feedstock is disclosed. The process includes hydrotreating the bioregenerable feed stream in a hydrotreating reactor to hydrodeoxygenate the bioregenerable feed stream to provide a hydrotreated stream. A hydrocracking feed stream taken from the hydrotreated stream is hydrocracked in a hydrocracking reactor to provide a hydrocracked stream. A hydroisomerization feed stream taken from the hydrotreated stream is hydroisomerized in a hydroisomerization reactor to provide a hydroisomerized stream. The hydroisomerized stream is separated to provide a jet fuel stream and a diesel stream. The diesel stream is separated into a first recycled diesel stream and a second recycled diesel stream. The first recycle diesel stream is passed to a hydrocracking reactor and the second recycle diesel stream is passed to a hydroisomerization reactor.

Provided are a precursor compound of a tetracyclic hydrocarbon and a preparation method thereof, and a tetracyclic hydrocarbon and a preparation method and use thereof. The precursor compound of the tetracyclic hydrocarbon with a structure shown in formula I has a polycyclic structure. The precursor compound is subjected to hydrodeoxygenation so as to be prepared into the tetracyclic hydrocarbon with a structure shown in formula II that has a high density (0.986 g / cm3), a high calorific value (41.14 MJ / L), and a low freezing point (less than −60° C.).

The invention discloses a biological aviation kerosene and diesel oil hydrogenation coupling system and a hydrogenation process. The hydrogenation coupling system comprises a biological aviation kerosene hydrogenation system and a diesel oil hydrogenation system; and a gas phase outlet of a thermal high-pressure separator of the diesel hydrogenation system is respectively connected with a material inlet pipeline of a hydrogen mixer I, a material inlet pipeline of a hydrogen mixer II and an outlet pipeline of a heat exchanger II of the biological aviation kerosene hydrogenation system. The hydrogenation process comprises the following steps: (1) mixing a biological aviation kerosene raw material with hot high-pressure separated gas, and reacting in the hydrodeoxygenation reaction unit; (2) mixing effluent of the hydrodeoxygenation reaction unit with hot high-pressure separated gas, and enabling the mixture to enter an isomerization reaction unit to be subjected to an isomerization reaction; and (3) mixing the effluent of the isomerization reaction unit with the hot high-pressure gas, cooling, and carrying out steam stripping fractionation to obtain the biological aviation kerosene product. The invention solves the problem of sulfur loss of the hydrodeoxygenation catalyst, reduces the destructive effect of water vapor on the catalyst, prolongs the operation cycle of the device, simplifies the process flow, and reduces the investment of the device.

The invention belongs to the technical field of waste textile reutilization and fuel preparation. The invention provides a method for fuelizing waste textiles, which is characterized in that the waste textiles are converted into hydrocarbon fuel under certain conditions by adopting a supported non-noble metal-metal oxide catalyst and a hydrodeoxygenation and denitrification method. The method provided by the invention can realize energy utilization of the waste textiles under low-cost and mild conditions, can solve the problem of low recycling rate of the waste textiles, and has important significance on high-valued utilization of the waste textiles.

This invention provides a process for preparing light white oil with low aromatic content from Fischer-Tropsch synthetic wax, comprising: Fischer-Tropsch synthetic wax undergoing hydrodeoxygenation under hydrorefining conditions to obtain refined Fischer-Tropsch synthetic wax; the refined Fischer-Tropsch synthetic wax entering a hydrocracking reactor undergoing hydrocracking isomerization to obtain wax conversion oil; the wax conversion oil entering a distillation separator undergoing distillation and being cut into diesel fraction and cracking tail oil, the diesel fraction being cut into light white oil, No. 5 industrial white oil, and a 230-290℃ distillate oil; some or all of the cracking tail oil being recycled to the hydrocracking reactor; the refined Fischer-Tropsch synthetic wax passing through a hydrocracking catalyst bed in the hydrocracking reactor, with a refining agent layer at the bottom of the reactor, and refining agent layers above the third and fourth hydrocracking catalyst beds, and quench hydrogen being added above the refining agent layers. This invention reduces the aromatic content in light white oil, achieving the goal of producing high-quality light white oil.

This invention provides a core-shell structured catalyst and method for biomass-to-aviation kerosene production, relating to the technical field of solid waste resource utilization. The core-shell structured catalyst of this invention comprises, from the inside out, an active core, a transition layer, and a functional shell. The active core includes a support and a Ru-Ni alloy supported on the support. The transition layer includes a nitrogen-doped carbon layer. The functional shell includes a composite molecular sieve formed from W2C and ZSM-5. This invention solves the technical problems of traditional catalysts, such as single function, low hydrodeoxygenation efficiency, low product selectivity, insufficient stability, and harsh reaction conditions. Compared with traditional biomass hydrocracking catalysts (single-metal catalysts), it improves biomass conversion rate and aviation kerosene fraction selectivity, extends catalyst life, and reduces production costs, meeting environmental protection and resource utilization requirements.

This invention discloses a method for producing furanyl products by gas-phase hydrodeoxygenation of furfural. The furanyl products include 2-methylfuran, furan, 2-methyltetrahydrofuran, and tetrahydrofuran. The method comprises the following steps: granulating and sieving a catalyst and loading it into a reaction tube; sequentially loading a first inert packing material onto the catalyst, followed by a second inert packing material for furfural gasification; then installing the reaction tube in a fixed-bed reactor; after pre-reduction of the catalyst, introducing hydrogen and furfural, and reacting under atmospheric pressure to obtain the furanyl products. The catalyst preparation method provided by this invention is simple, the catalyst has high Cu dispersion, and its performance is stable during the synthesis of furanyl products; the furfural gas-phase hydrodeoxygenation technology provided by this invention is simple and easy to operate, achieving furfural gasification and further reaction in the same reaction tube, with easily controllable reaction parameters and good experimental repeatability.

The invention discloses an oil product hydrodesiliconization method which comprises the following steps: under hydrodesiliconization process conditions, a mixed raw material of silicon-containing raw oil and animal and vegetable oil is in contact with a hydrodesiliconization catalyst for hydrodesiliconization reaction to obtain a desiliconization product. The method is simple in process, high-quality kerosene and diesel oil components can be obtained through re-hydrodeoxygenation or hydrodeoxygenation after fractionation of the animal and vegetable oil subjected to the desiliconization process, and the method is easy to implement in refinery plant devices.

This application discloses a method for producing bio-jet fuel from plant bitumen, belonging to the field of plant bitumen recycling technology. The method includes the following steps: (1) preheating and reducing the viscosity of the purified plant bitumen, and pre-mixing it with hydrogen to obtain a premixed hydrogen feedstock; (2) adding an oil-soluble catalyst to the premixed hydrogen feedstock, and obtaining intermediate product I after a first-stage hydrogenation; (3) adding intermediate product I to a fixed-bed reactor, and performing a second-stage hydrogenation under the action of a hierarchical porous composite molecular sieve catalyst to obtain intermediate product II; (4) fractionating intermediate product II to obtain bio-jet fuel. This method preheats and reduces the viscosity of plant bitumen, and sequentially uses an oil-soluble catalyst and a hierarchical porous composite molecular sieve catalyst for hydrodeoxygenation, hydrocracking, and hydroisomerization, which can improve the catalytic efficiency and catalytic stability of plant bitumen, thereby improving the isomerization selectivity, yield, and quality of bio-jet fuel.

The present application relates to a method for synthesizing cyclopentadiene from a biomass platform compound cyclopentanone, which uses cyclopentanone as a raw material, and is synthesized by hydrogenation-deoxidization and dehydrogenation in series in a fixed-bed continuous reactor under the action of a composite metal oxide catalyst of A x B y O z type. The process route is simple, environmentally friendly, and the catalyst is easy to prepare, thus providing a new and effective approach for synthesizing cyclopentadiene from cyclopentanone.

A broad aspect of the present disclosure relates to a process for conversion of a feedstock containing at least 5 wt % aromatics, originating from thermal decomposition of solids, comprising the steps of directing the feedstock to contact a material catalytically active in hydrodeoxygenation under hydrodeoxygenation conditions in the presence of dihydrogen, to provide a deoxygenated intermediate, directing at least an amount of the deoxygenated intermediate to contact a material catalytically active in hydrodearomatization under hydrodearomatization conditions in the presence of dihydrogen, to provide an dearomatized intermediate.This has the associated benefit of converting a feedstock such as pyrolysis oil to a product or an intermediate compatible with diesel fuel requirements with a minimal yield loss.

The invention provides a hydrodeoxygenation composite carrier and a preparation method and application thereof.The preparation method comprises the steps that an aluminum-containing inorganic porous material, an acid solution, an extrusion aid, magnesium salt and nickel salt are mixed and then subjected to extrusion molding to obtain a carrier precursor, and the carrier precursor is dried and roasted to obtain the hydrodeoxygenation composite carrier; the total weight of the hydrodeoxygenation composite carrier is 100%, and the content of the magnesium element is 0.3-8%, and the content of the nickel element is 0.3-1%. The hydrodeoxygenation composite carrier provided by the invention has hydrothermal resistance and higher mechanical strength, and can improve the hydrothermal stability of a grease hydrodeoxygenation catalyst taking the hydrodeoxygenation composite carrier as a carrier in the hydrodeoxygenation process, thereby improving the deoxygenation effect of the grease hydrodeoxygenation catalyst.

A hydrodeoxygenation catalyst for oils and fats, and a preparation method therefor and the use thereof. The preparation method comprises: mixing an aluminum-containing inorganic porous material, an acidic solution, an extrusion aid, a magnesium salt and a nickel salt, then subjecting same to extrusion molding to obtain a carrier precursor, and drying and roasting the carrier precursor to obtain a hydrodeoxygenation composite carrier; and impregnating an impregnation solution containing an active metal onto the hydrodeoxygenation composite carrier, and then drying and roasting same to obtain a hydrodeoxygenation catalyst for oils and fats. When preparing a hydrodeoxygenation composite carrier in the present invention, a magnesium salt and a nickel salt are used in combination to obtain a hydrodeoxygenation composite carrier having a nickel-doped magnesium aluminum spinel structure. The hydrodeoxygenation composite carrier has good hydrothermal stability and mechanical strength. The hydrodeoxygenation catalyst for oils and fats, which is prepared by loading an active metal component on the hydrodeoxygenation composite carrier, has stable deoxygenation activity and an excellent deoxygenation effect.

The present invention describes a process for treating a feedstock from a renewable source implementing a sequence of at least one hydrotreating step using a specific hydrodeoxygenation catalyst comprising at least one metal from group VIII, in combination with at least one metal from group VIB of the periodic table, the atomic ratio between the elements of group VIB and VIII being between 0.02 mol / mol and 0.2 mol / mol, at least one organic additive and an oxide support comprising at least alumina followed by a single-step hydroisomerization step, to produce at least one diesel fraction.