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1001 results about "Catalyst support" patented technology
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In chemistry, a catalyst support is the material, usually a solid with a high surface area, to which a catalyst is affixed. The activity of heterogeneous catalysts and nanomaterial-based catalysts occurs at the surface atoms. Consequently, great effort is made to maximize the surface area of a catalyst by distributing it over the support. The support may be inert or participate in the catalytic reactions. Typical supports include various kinds of carbon, alumina, and silica.
High-oxygen-storage cerium-zirconium solid solution material and preparation method thereof
ActiveCN120900613AHeterogenous catalyst chemical elementsMetal/metal-oxides/metal-hydroxide catalystsPtru catalystCerium
The invention discloses a high-oxygen-storage zirconium solid solution material and a preparation method, and belongs to the technical field of rare earth catalytic materials, and the method comprises the following steps: precursor preparation, ultrasonic dispersion, double-gradient precipitation, ultrasonic aging, solid-liquid separation, three-section roasting and furnace cooling. Through the synergistic effect of double-gradient precipitation and ultrasonic aging, coarse grains and non-uniform particle size distribution are avoided, and the material is not prone to abnormal growth of the grains and structural collapse in long-term high-temperature service. Meanwhile, according to the gradient roasting process, through step-by-step regulation and control of crystal densification and crystal lattice reconstruction, separation of a fluorite phase and a pyrochlore phase easily occurring in traditional low-temperature single-section roasting is reduced, a stable crystal phase structure is maintained, it is ensured that the material can still keep sufficient active surface and pore channel structures under the working conditions of high temperature and thermal shock alternation, and the performance of the material is improved. The oxygen storage capacity and the long-term durability of the catalyst carrier are obviously improved.
Owner:GANZHOU BOJING TECH
Reticular porous spherical aluminum oxide as well as preparation method and application thereof
The invention relates to the technical field of catalyst carriers, and discloses reticular porous spherical aluminum oxide as well as a preparation method and application thereof. The preparation method comprises the following steps: (1) mixing an aluminum source, acid, a pore-forming agent, a surfactant and water to obtain pseudo sol; (2) performing ultrasonic treatment and oil ammonia column forming treatment on the pseudo sol obtained in the step (1) to obtain gamma-Al2O3 spherical gel beads; and (3) aging, washing, drying and calcining the gamma-Al2O3 spherical gel beads obtained in the step (2) to obtain the reticular porous spherical alumina. The spherical aluminum oxide prepared by the method has abundant communicated reticular pore channels, is obviously distributed in mesopore and macropore ranges, is beneficial to obviously improving dispersion and loading of a catalyst in an aluminum oxide carrier and improving the performance of petroleum reforming and propane dehydrogenation, and has industrial production utilization value and commercial value.
Owner:BEIJING UNIV OF CHEM TECH
Preparation method and application of catalyst for preparing olefin through hydrogenation of carbon dioxide
The invention relates to the technical field of catalysts, and discloses a preparation method and application of a catalyst for preparing olefin through carbon dioxide hydrogenation. The preparation method comprises the following steps: fully dipping graphite in a mixed solution of dodecane and hexadecane, and taking out to obtain a catalyst carrier; and loading the Fe element and the Mg element into the catalyst carrier by adopting a method of co-precipitating and then roasting to obtain the catalyst for preparing olefin by hydrogenation of carbon dioxide. The catalyst prepared by the preparation method has high stability when being used in a reaction for preparing olefin through hydrogenation of carbon dioxide, can maintain high catalytic activity after long-term use, and has high olefin selectivity at the same time.
Owner:YILI XINTIAN COAL CHEM CO LTD +1
Preparation method and application of carbon dioxide hydrogenation catalyst
ActiveCN120733745AOrganic compound preparationRegenerative fuel cellsChromium trioxideElectrolytic agent
The invention discloses a preparation method and application of a carbon dioxide hydrogenation catalyst, and belongs to the field of hydrogenation catalysis. The vanadium slag is used as a raw material, a leaching solution containing silicon, chromium and vanadium is obtained through sodium salt roasting, an aluminum source is added to remove the silicon element, meanwhile, an ordered mesoporous carbon material is added, and silicon and aluminum elements are converted into an ordered mesoporous composite oxide which is used as a hydrogenation catalyst carrier; an indium salt, a cerium salt and a nickel salt are dissolved in ethanol and mixed with the carrier for isopyknic impregnation to obtain the hydrogenation catalyst; and carrying out chromium and vanadium separation on the silicon-removed leaching solution to obtain chromium sesquioxide and the all-vanadium redox flow battery electrolyte. The catalyst has a regular pore structure, ordered mesopores provide a confinement effect, dispersion and anchoring of active components are facilitated, and the activity of the catalyst is remarkably improved.
Owner:SHANDONG HAIHUA GRP CO LTD +1
Highly active and stable catalyst for synthesizing methacrylonitrile, its preparation method and application thereof
The application discloses a high-activity and high-stability catalyst for synthesizing methacrylonitrile and a preparation method and application thereof, and has the technical scheme that (1) manganese dioxide powder is added into an acid solution and placed in an oven, and the manganese dioxide powder is pickled at 120-150 DEG C for 10-24h; the pickling solution is filtered, washed, dried and calcined to obtain a pickling-treated catalyst carrier; (2) a ruthenium precursor is added into a solvent and fully dissolved to obtain a ruthenium solution; the pickling-treated catalyst carrier is added into the ruthenium solution and loaded under ultrasonic, and then the solution is filtered, washed, dried and calcined to obtain a ruthenium monatomic catalyst. The method is simple, the reaction condition is mild, the production cost is low, raw materials are easy to obtain, the conversion rate of methacrolein is high, the yield of methacrylonitrile is high, and the stability is good.
Owner:WUHUAN ENG +1
A method for modifying a Pd catalyst support medium and its application
ActiveCN118268040BOrganic compound preparationOrganic-compounds/hydrides/coordination-complexes catalystsPtru catalystHydrogenation reaction
This invention discloses a method for modifying the support medium of a Pd catalyst and its application. The preparation method of the Pd catalyst includes reacting zirconium salt, organic ligands, and acid to obtain a support UiO-66-X; then loading Pd onto the support UiO-66-X and reducing it to obtain the catalyst Pd@UiO-66-X; the organic ligands include 2-nitroterephthalic acid, 2-methoxyterephthalic acid, 2-aminoterephthalic acid, and terephthalic acid, and X is selected from NO2, OMe, NH2, and H. This invention changes the surface electron cloud density of the supported Pd nanoparticles by changing the ligands (-NO2, -H, -OMe, -NH2) of the support UiO-66, resulting in different abilities to activate hydrogen, thereby regulating the dehydrogenation and hydrogenation reactions in the racemicization process of Pd catalysis. The synergistic effect of different ligands with Pd changes the racemicization catalytic activity.
Owner:ZHENGZHOU UNIV
Normal-temperature conversion and absorption bifunctional catalyst and preparation method thereof
PendingCN121060536ADispersed particle separationGas purification by catalytic conversionPtru catalystAlkali metal oxide
The invention relates to the technical field of catalyst preparation and application, in particular to a normal-temperature conversion and absorption bifunctional catalyst and a preparation method thereof. The technical scheme adopted by the invention is as follows: the normal-temperature conversion and absorption bifunctional catalyst comprises the following components in parts by weight: 3-15% of transition metal oxide; the content of the gamma-Al2O3 is 75%-95%; 1-5% of an alkali metal oxide; the transition metal oxide is an oxide of one or more transition metals selected from cobalt, copper, nickel, manganese and iron; the alkali metal oxide is an oxide of one or more alkali metals of potassium, calcium, sodium and magnesium. The method has the advantages that the novel catalyst capable of converting and absorbing organic sulfur at normal temperature can be obtained by optimizing the types of the catalyst carrier, the auxiliaries and the active components and adjusting the composition proportion of the catalyst, and the requirements of simple production process and high desulfurization precision can be met.
Owner:江苏华海三联净化材料有限公司
Platinum-based bimetallic propane dehydrogenation catalyst and preparation method thereof
The invention belongs to the field of catalyst preparation, and particularly relates to a platinum-based bimetallic propane dehydrogenation catalyst and a preparation method thereof. The method comprises the following steps: firstly, weighing beta molecular sieve powder, adding into a concentrated nitric acid solution, stirring and refluxing at high temperature, centrifugally washing, and drying to obtain a dealuminated beta molecular sieve; then calcining the metal additive oxide powder and the dealuminated beta molecular sieve in a reducing atmosphere to obtain composite beta molecular sieve powder; then weighing platinum precursor salt, dissolving the platinum precursor salt in ultrapure water to form a solution, and then adding ethylenediamine for coordination; and finally, impregnating the composite beta molecular sieve with a platinum precursor solution, and carrying out aging, drying and high-temperature treatment to obtain the dealumination beta molecular sieve loaded platinum-based bimetallic catalyst. According to the method provided by the invention, the metal is spontaneously and highly dispersed on the carrier by utilizing the capturing effect of the beta molecular sieve silanol nest on the metal and combining the dynamic migration behavior of the metal under high-temperature reduction. The prepared catalyst shows extremely high propane conversion activity and selectivity at 600 DEG C, and is excellent in stability.
Owner:TIANJIN UNIV
Binder for forming catalyst as well as preparation method and application of binder
PendingCN121249272ANon-macromolecular adhesive additivesMolecular sieve catalystsPolyesterPtru catalyst
The invention belongs to the field of catalyst preparation, and particularly relates to a binder for catalyst forming and a preparation method and application thereof. The binder for forming the catalyst, provided by the invention, is prepared from the following raw materials in parts by weight: 0.5 to 2 parts of magnesium chloride, 1 to 2 parts of magnesium oxide, 0.5 to 2 parts of sodium carboxymethyl cellulose, 1 to 3 parts of ethylenediamine tetraacetic acid, 2 to 6 parts of nano-hydroxyapatite modified polyester, 1 to 3 parts of organic solvent and 10 to 35 parts of water. When the binder provided by the invention is applied to catalyst forming, on one hand, the problems that a conventional catalyst is poor in binding performance, and acid gas corrodes equipment and pollutes the environment in the roasting process can be solved; on the other hand, the surface acidity of the catalyst carrier can be reduced, a suitable reaction environment can be provided for some reactions needing to be carried out in an alkaline environment or reactions with acidic reactants and intermediates, and the selectivity and conversion rate of the reactions are improved.
Owner:CHAMBROAD CHEM IND RES INST CO LTD
Constant-temperature and constant-humidity spherical catalyst carrier preparation device and preparation method thereof
PendingCN121130731ACatalyst activation/preparationGranulation by material expressionPtru catalystMaterial transfer
The invention discloses a constant-temperature and constant-humidity spherical catalyst carrier preparation device and a preparation method thereof, and relates to the technical field of spherical catalyst carrier preparation.The constant-temperature and constant-humidity spherical catalyst carrier preparation device comprises a material mixing mechanism, a knife valve is installed at the lower end of the material mixing mechanism, and a single-head spiral blanking machine is installed below the knife valve; an internal mixer is installed below the single-head spiral blanking machine, a spiral extruder is installed at the lower end of the internal mixer, a blanking head is arranged below the end of the internal mixer and connected with a feeding port of the spiral extruder, and a grain cutting head is installed on the outer side of the end of the spiral extruder. According to the scheme, the problems that an existing spherical catalyst preparation device is dispersed in structure, a powder mixer, an internal mixer, an extruder and a rolling drum are independently arranged, the occupied area is large, time and labor are wasted in material transfer in the middle process, the production efficiency is affected, and loss in the material transfer process can be caused are solved.
Owner:HIGH CHEM JIANGSU CHEM NEW MATERIALS CO LTD
Monatomic iron and ferric oxide cluster synergistic graded porous hollow carbon fiber catalyst as well as preparation method and application thereof
The invention belongs to the technical field of electrocatalytic nitrate reduction catalysts, and particularly relates to a graded porous hollow carbon fiber catalyst with synergistic monatomic iron and ferric oxide clusters as well as a preparation method and application of the graded porous hollow carbon fiber catalyst. The preparation method specifically comprises the following steps: stirring polyacrylonitrile and polymethyl methacrylate in an organic solvent to obtain a spinning precursor solution; the preparation method comprises the following steps: taking ferrous sulfate heptahydrate and 1, 10-phenanthroline as ligands, and stirring in an organic solvent to obtain a metal organic ligand; the preparation method comprises the following steps: stirring a spinning precursor solution and a metal organic ligand, obtaining a metal precursor-loaded composite fiber through an electrostatic spinning technology, and then carrying out pre-oxidation and high-temperature pyrolysis to obtain the composite fiber. The prepared carbon fiber has good conductivity and a unique hollow hierarchical porous structure, transmission of reactants is greatly promoted while more active sites are exposed, the carbon fiber serves as a monatomic synergistic cluster catalyst carrier, rapid transmission of electrons is facilitated, and the electro-catalysis efficiency is effectively improved.
Owner:CHINA UNIV OF MINING & TECH (BEIJING) +1
SCR denitration catalyst carrier and preparation method thereof
The invention relates to an SCR (Selective Catalytic Reduction) denitration catalyst carrier and a preparation method and application thereof, and the preparation method comprises the following steps: (1) crushing a waste FCC (Fluid Catalytic Cracking) catalyst, performing roasting treatment, and performing dry ball milling after roasting to obtain powder; (2) adding the powder into a mixed acid solution for pickling treatment, wherein the mixed acid comprises inorganic acid and organic acid; (3) filtering and washing the material subjected to acid pickling treatment to obtain a solid, and drying and roasting the solid to obtain molecular sieve carrier powder; and (4) mixing the carrier powder with TiO2 by a sol-gel method to prepare a composite carrier, namely the SCR denitration catalyst carrier. The waste FCC catalyst is used as a raw material to prepare the SCR denitration catalyst carrier, and the carrier has the advantages of low heavy metal content, high active component content, good water resistance and the like.
Owner:CHINA PETROLEUM & CHEMICAL CORP +1
Shell type supported Ni-based catalyst as well as preparation method and application thereof
The invention discloses a shell type supported Ni-based catalyst as well as a preparation method and application thereof, and relates to the technical field of catalysts. The method comprises the following steps: improving a vacuum drum impregnator, and heating and stirring nickel salt, a surfactant, deionized water and a peptizing aid to obtain impregnation liquid; pumping the impregnation liquid into a spraying disc of a vacuum drum impregnator, placing the catalyst carrier in the vacuum drum impregnator, and performing spraying impregnation to obtain a primary impregnation catalyst precursor; drying, aging and roasting the primary impregnation catalyst precursor to obtain a primary impregnation catalyst; and repeatedly spraying, drying, aging and roasting for a plurality of times after dipping the catalyst for one time to obtain the shell-type supported Ni-based catalyst. The shell-type supported Ni-based catalyst is used for hydrogenation reaction of 3-hydroxypropionaldehyde, and under the same reaction efficiency, the loading equivalent of the catalyst is lower, that is, the catalyst has higher mass space velocity, mild reaction conditions, higher raw material conversion rate and higher product selectivity.
Owner:FUHAI (DONGYING) TECHNICAL SERVICES CO LTD
A n2o decomposition catalyst using waste rare earth-based denitration catalyst as raw material and a preparation method thereof
The application discloses a N2O decomposition catalyst taking waste and old rare earth-based denitration catalyst as raw material and a preparation method thereof, and the catalyst is prepared from the waste and old rare earth-based denitration catalyst, diatomite and kaolin as a N2O decomposition catalyst carrier, and a nickel-lanthanum composite oxide (NiLaO x ) as a catalytically active component. The waste and old rare earth-based denitration catalyst, diatomite and kaolin are prepared into the carrier through crushing, batching and calcining processes, a nickel-lanthanum composite oxide precursor is configured into a colloidal solution, then the carrier is immersed in the nickel-lanthanum composite oxide precursor colloidal solution, and the N2O decomposition catalyst is obtained through drying and calcining. The catalyst not only realizes harmless disposal of the waste and old rare earth-based denitration catalyst, but also uses the waste and old rare earth-based denitration catalyst as a high-value resource for N2O decomposition, and the catalyst has high N2O decomposition activity and strong stability.
Owner:NANJING HUANFU NEW MATERIAL TECH CO LTD
Spherical catalyst carrier drying device
The invention belongs to the technical field of catalyst carrier drying, and particularly relates to a spherical catalyst carrier drying device which comprises a shell, a conveying frame is fixedly arranged in the shell, a mesh belt is arranged in the conveying frame, and the outer surface of the mesh belt is jointly divided into a plurality of spreading areas through a plurality of transverse isolating bars and two longitudinal isolating bars. A plurality of air supply assemblies are arranged on the upper side and the lower side of the loading section of the mesh belt, and lifting mechanisms are arranged on the left side and the right side of the mesh belt. The lower air supply assembly is driven by the lifting mechanism to move upwards and get close through the variable-pitch guide assembly, the local air supply strength is improved under the condition that the air source pressure is not increased, a carrier staying at a mesh belt hole end opening can be blown out upwards, mesh hole blocking is avoided, evaporation of free water on the surface of the carrier and discharging of water vapor can be accelerated, and the service life of the carrier is prolonged. Meanwhile, local stacked carriers are scattered in combination with strong wind rolling, material layer uniformity is always guaranteed, full penetration of hot air is guaranteed, and the drying rate is greatly increased.
Owner:SHANDONG QIXIAN NEW MATERIAL TECH CO LTD
Catalyst for oxidative removal of CO in steel low-temperature high-sulfur sintering flue gas and preparation method thereof
PendingCN121338746ADispersed particle separationMetal/metal-oxides/metal-hydroxide catalystsPtru catalystPlatinum salts
The invention relates to a catalyst for oxidative removal of CO in low-temperature high-sulfur sintering flue gas of steel, the catalyst takes four mixed oxides of Al2O3, SiO2, TiO2 and ZrO2 as a carrier, Pt atoms dispersed in a monatomic layer as an active component and La2O3, CeO2, SnO2 and Nb2O5 as active auxiliaries, the four oxides are firstly mixed and roasted in the preparation process to obtain a catalyst carrier, and the catalyst carrier is added into the catalyst for oxidation removal of CO in the low-temperature high-sulfur sintering flue gas of the steel, so that the catalyst can be used for oxidation removal of CO in the low-temperature high-sulfur sintering flue gas of the steel. Then fully mixing the active auxiliary agent and the catalyst carrier, carrying out microwave heating to obtain catalyst pug, finally spraying a platinum salt solution to the surface of the catalyst pug in the form of steam to obtain a monatomic Pt-loaded catalyst pug precursor, and molding to obtain the catalyst. The catalyst prepared by the invention has good CO oxidation catalytic activity and poisoning resistance in steel sintering flue gas at 120-200 DEG C.
Owner:BEIJING NAT POWER GRP CO LTD
Special-shaped catalyst carrier forming die and special-shaped catalyst carrier forming device
Owner:CHINA PETROLEUM & CHEMICAL CORP +1
Low space velocity scr catalyst and method for making same
ActiveCN119926525BMolecular sieve catalystsDispersed particle separationMolecular sievePtru catalyst
This invention discloses a low-space-velocity (SCR) catalyst and its preparation method. The catalyst includes a coating and a support layer. The coating comprises a coating material consisting of a mixture of tungsten-doped (5%) anatase nano-titanium dioxide, titanium dioxide, and SSZ-13 molecular sieve, with a content of 56.1 wt% to 75.6 wt% of the total loading. The method includes the following steps: preparing a support layer solution and a coating material; preparing a catalyst slurry; drying a catalyst support with a support layer solution; coating the catalyst support with the catalyst slurry; and calcining and drying to obtain the catalyst. This invention improves the coating uniformity and efficiency by coating the support layer solution and the catalyst slurry, thereby improving the NO content of the catalyst under low space velocity conditions. x Conversion efficiency.
Owner:SINOCAT ENVIRONMENTAL TECH CO LTD
A platinum-based catalyst, its preparation method, and its application in low-temperature methane combustion.
ActiveCN119657119BIncinerator apparatusMetal/metal-oxides/metal-hydroxide catalystsPtru catalystNatural gas vehicle
This invention discloses a platinum-based catalyst, its preparation method, and its application in the catalytic combustion of methane. The preparation method includes reacting a catalyst supported on reduced platinum in a mixed atmosphere of methane / nitrous oxide or methane / nitrous oxide / inert gas at the lowest temperature required for the complete catalytic combustion of methane by nitrous oxide, yielding a catalyst supported on low-oxidation-state platinum. This invention achieves a breakthrough reduction in the temperature for complete methane conversion to below 200°C and maintains long-term stability. This invention enables the simultaneous degradation of two greenhouse gases, methane and nitrous oxide, which is beneficial for mitigating the greenhouse effect. The catalyst of this invention has a simple manufacturing process, excellent performance, and long lifespan, and can be widely used in equipment such as flue gas treatment, natural gas vehicle exhaust treatment, and air purifiers.
Owner:ZHEJIANG UNIV
A catalyst carrier powder conveying apparatus
ActiveCN224394074Ureduce adsorptionreduce frictional resistanceLarge containersLoading/unloadingPtru catalystMechanical engineering
The utility model relates to powder conveying technical field especially is concerned on a kind of catalyst carrier powder conveying equipment;Including the hopper of cone angle ≥70 °, the roughness Ra of the inner wall surface of hopper ≤0.4 μm, pneumatic flow-aiding ring is set in the height ≤1 / 3 cone height of hopper lower part and the height from discharge port, and the annular air cavity of pneumatic flow-aiding ring is connected outside gas source;Pneumatic flow-aiding ring circumferentially distributes first nozzle group and second nozzle group, and the jet direction of first nozzle group is inclined upwards along hopper inner wall, for fluidizing powder layer in advance;The jet direction of second nozzle group is inclined downwards along hopper inner wall, for promoting powder slip.
Owner:RENQIU NORTH CHINA PETROLEUM CLEAN ENVIROMENTAL PROTECTION CO LTD
Method for preparing isostearic acid by hydrogenation of bio-based carrier catalyst
PendingCN121449499ACarboxylic preparation by ozone oxidationMetal/metal-oxides/metal-hydroxide catalystsChemical industryPtru catalyst
The invention discloses a method for preparing isostearic acid by hydrogenation of a bio-based carrier catalyst, and relates to the technical field of oleochemical engineering and catalyst preparation, and the method comprises the following steps: S1, preparing a bio-based supported catalyst; s2, taking isomerized oleic acid as a raw material, and carrying out catalytic hydrogenation reaction under the action of a catalyst; s3, separating a product obtained after the hydrogenation reaction to obtain isostearic acid; according to the method for preparing isostearic acid by hydrogenation of the bio-based carrier catalyst, oyster shells are selected as a catalyst carrier, and specific pretreatment and high-temperature firing are performed, so that waste biomass resources are converted into a high-specific-surface-area calcium oxide carrier with a natural nanoscale sheet-shaped superposed three-dimensional space structure; high-value utilization of waste resources is achieved, so that the effects that the cost of raw materials of the catalyst is remarkably reduced and the carrier is environmentally friendly are achieved, and the high-activity non-noble metal hydrogenation catalyst is obtained by adopting copper nitrate solution impregnation and combining with a loading mode of subsequent hydrogen reduction.
Owner:CANGZHOU ZHONGKE GREASE CO LTD +1
A catalytic system for ester exchange reaction of swill-cooked oil
ActiveCN117884129BFatty acid esterificationMetal/metal-oxides/metal-hydroxide catalystsPtru catalystReaction rate
The present application provides a kind of waste oil transesterification reaction catalytic system, belong to biomass refining field.The preparation steps of catalyst include: in the solution containing Ni (NO3) 2 And Fe (NO3) 3 Carboxymethyl cellulose is added, then urea is added, reaction is carried out, and nano-porous NiFe2O4 is obtained, MgCl2 / ZnCl2 Solution and KOH / K2CO3 Solution are added to NiFe2O4 water dispersion, reaction is carried out, solid product is collected, calcination is carried out, and catalyst is obtained.Catalyst is added to waste oil to carry out catalytic reaction.The present application adopts carboxymethyl cellulose to regulate the crystal form, grain size and dispersity of catalyst carrier, and the obtained solid magnetic catalyst can improve the production efficiency of waste oil for preparing biodiesel.The catalyst has high active site, fast reaction rate, mild reaction condition, can reduce reaction energy consumption and production cost.The catalyst also has good magnetic property, is convenient for recovery.The catalyst has good stability, improves the controllability and stability of reaction.
Owner:QILU UNIVERSITY OF TECHNOLOGY (SHANDONG ACADEMY OF SCIENCES)
Method for preparing dihydric alcohol by hydrogenolysis of polyhydric alcohol
PendingCN121945048APreparation by OH group eliminationMetal/metal-oxides/metal-hydroxide catalystsPolymer sciencePolyol
The invention relates to a method for preparing dihydric alcohol by hydrogenolysis of polyhydric alcohol, the hydrogenolysis process of the polyhydric alcohol is carried out in the presence of a supported catalyst, the catalyst carrier is formed alumina, and the active component is Pt metal and an auxiliary agent A thereof; the auxiliary agent A is one or more than two of Mo, Fe, La, Ce, Sn, Zr, Zn, W, Al, Ga, Mn, Nd and Ta, and the loading capacity of the auxiliary agent A is 0.01%-15% by mass of Al2O3. Compared with the prior art, the selectivity of 1, 3-propylene glycol prepared by hydrogenolysis of glycerin and the like can be improved, the glycerin conversion rate can be increased, the reaction pressure window can be widened, and the stability can be improved.
Owner:DALIAN INSTITUTE OF CHEMICAL PHYSICS CHINESE ACADEMY OF SCIENCES
Preparation process of anhydrous magnesium chloride
PendingCN121850019AAvoid hydrolysis side reactionsachieve isolationMagnesium chloridesMolecular sievePtru catalyst
The invention belongs to the technical field of anhydrous magnesium chloride production, and particularly relates to a preparation process of anhydrous magnesium chloride, which comprises the following steps: firstly, dissolving magnesium chloride hexahydrate in absolute ethyl alcohol to form a magnesium chloride ethanol aqueous solution, and then dehydrating the magnesium chloride ethanol aqueous solution by using a molecular sieve to obtain the magnesium chloride ethanol solution; carrying out secondary cooling, stirring crystallization, secondary solid-liquid separation and vacuum drying on the magnesium chloride ethanol solution to obtain high-purity anhydrous magnesium chloride; and recycling ethanol liquid obtained by solid-liquid separation and ethanol gas obtained by vacuum drying. The technical scheme provided by the invention is simple in process flow, low in energy consumption, low in equipment requirement, high in product yield and high in purity, and can be directly applied to the fields of electrolytic preparation of magnesium, catalyst carriers and the like.
Owner:SHANDONG HAIHUA GRP CO LTD +3
Composite anti-antipole anode catalyst layer based on Pt catalyst loaded by carbon fiber as carrier and preparation method of composite anti-antipole anode catalyst layer
The invention discloses a composite anti-antipole anode catalyst layer based on a Pt catalyst loaded by carbon fiber as a carrier and a preparation method of the composite anti-antipole anode catalyst layer, and belongs to the field of new energy fuel cells. The composite anti-reverse anode catalyst layer comprises a carbon fiber loaded Pt catalyst and an OER catalyst; in the carbon fiber supported Pt catalyst, the diameter of the carbon fiber is 10 to 1000 nm. The carbon carrier adopted by the invention is carbon fiber, and the conductivity and mass transfer capacity of the carbon carrier are superior to those of a metal oxide carrier material. The carbon fiber treatment and Pt catalyst preparation processes are simple, no organic ligand is needed, the cost is low, and large-scale production is easy. According to the technical scheme adopted by the invention, the particle size of the OER catalyst is kept between 1 nm and 10 nm, and the utilization rate of the OER catalyst can be formed and improved when the OER catalyst and the carbon fiber supported Pt catalyst form a composite catalyst layer, so that the overall anti-reverse pole performance of the catalyst layer is improved.
Owner:DALIAN INSTITUTE OF CHEMICAL PHYSICS CHINESE ACADEMY OF SCIENCES
Catalyst device, sample vessel and method of hydrogen exchange analysis for hydrogen isotope analysis
PCT designated stageWO2026068210A1Chemical analysis using catalysisChemical/physical/physico-chemical microreactorsPtru catalystHydrogen exchange
The invention comprises a catalyst device (1) for hydrogen isotope exchange analysis, wherein the catalyst device (1) consists of a catalyst carrier (10) and a catalyst material (20) applied to a surface (12) of the carrier (10), wherein at least the carrier surface (12) consists of an inorganic material and the catalyst material is sputtered or electrodeposited on at least a part of the surface (12) of the carrier (10). The invention further pertains to a sample vessel (100) for hydrogen isotope exchange analysis, wherein the sample vessel (100) contains one or more catalyst devices (1) according to the invention, wherein a maximum outer diameter (D) of the catalyst device (1) is smaller than a minimum inner diameter (101) of an opening of the sample vessel (100) or of the sample vessel (100) itself. The invention also foresees a method of hydrogen isotope analysis employing the sample vessel (100) and the use of the catalyst device (1) in a method of hydrogen isotope analysis.
Owner:THERMO FISHER SCI BREMEN
Method for producing macroporous pseudo-boehmite by double-aluminum method
PendingCN121269771ANanotechnologyAlkali-metal aluminates/aluminium-oxide/aluminium-hydroxide preparationPseudoboehmitePtru catalyst
The invention discloses a method for producing macroporous pseudo-boehmite by a double-aluminum method, and belongs to the field of preparation of inorganic porous materials. Aiming at the problems of difficulty in giving consideration to uniformity of crystal nucleus and aperture, serious chambering pollution, high washing water amount and batch instability in single pH gelling of a traditional double-aluminum method, the method comprises the following steps: after pretreatment of raw materials, carrying out segmented pH parallel flow gelling, synchronously dropwise adding a silicon-fluorine composite modifier in a chambering stage, and then carrying out gradient temperature control washing, composite modification aging and drying. The prepared macroporous pseudo-boehmite is suitable for a high-end catalyst carrier and has remarkable industrial advantages.
Owner:YANGZHOU ZHONGTIANLI NEW MATERIAL
Residue hydrodemetallization catalyst and method for making same
ActiveCN117960191BHeterogenous catalyst chemical elementsMetal/metal-oxides/metal-hydroxide catalystsPtru catalystActive agent
The application discloses a residual oil hydrodemetallization catalyst and a preparation method thereof. The method comprises the following steps: (1) an acid aluminum salt aqueous solution, an alkaline aluminum salt aqueous solution and a kaolin suspension liquid containing a surfactant are subjected to a first reaction to obtain slurry I; (2) an alkaline solution is introduced into the slurry I of step (1) to perform a second reaction to obtain slurry II; (3) the slurry II obtained in step (2) is subjected to hydrothermal treatment with a gallium nitrate solution, and then washed and dried to obtain a gallium-containing macroporous silica-aluminum material; (4) the gallium-containing macroporous silica-aluminum material is mixed with a plasticizing agent and a cementing agent, and then kneaded into a shape, and then dried and calcined to obtain a catalyst carrier; and (5) the catalyst carrier of step (4) is impregnated with an active metal impregnation liquid containing an organic acid and an alcohol compound, and then dried and calcined to obtain the residual oil hydrodemetallization catalyst. The catalyst can improve the demetallization activity and use stability of the catalyst in a residual oil hydroprocessing process.
Owner:CHINA PETROLEUM & CHEMICAL CORP +1
A process for recovering vanadium and molybdenum from spent petrochemical catalysts
The application belongs to the technical field of solid waste resource recycling and treatment in petrochemical industry, and particularly discloses a method for recovering vanadium and molybdenum from waste petrochemical catalysts. The method directly mixes granular waste petrochemical catalysts with an activating agent, and then performs short-time calcination in a microwave environment to obtain calcined slag. The calcined slag is directly treated by a low-speed stirring water immersion process, and after solid-liquid separation, leaching liquor containing rare metals vanadium and molybdenum and leaching slag which can be directly used as a catalyst carrier raw material are obtained. The method can realize rapid recovery of rare metals such as vanadium and molybdenum in waste petrochemical catalysts, has short recovery and treatment time, high recovery rate, and the waste catalysts after recovery and treatment have high alumina content and can be directly used as catalyst carrier raw materials.
Owner:INST OF RESOURCES UTILIZATION & RARE EARTH DEV GUANGDONG ACAD OF SCI
Catalyst system and method of making and using same
This application relates to catalyst systems and methods of making and using the same. Methods of making a catalyst system are provided that include contacting at least one aromatic hydrocarbon, at least one activator, at least one catalyst having a Group 3 to Group 12 metal atom or a lanthanide metal atom, and at least one catalyst support to form a first mixture. The methods include reducing the amount of aromatic hydrocarbon in the first mixture to form a second mixture having 1.5 wt% or less of aromatic hydrocarbon, based on the total weight of the second mixture. The methods can further include adding a saturated hydrocarbon to the second mixture to form a third mixture.
Owner:EXXONMOBIL CHEMICAL PATENTS INC