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248results about "Catalyst protection" patented technology

Method for synthesizing electronic-grade ethyl acetate through catalytic esterification of acidic ion exchange resin

The invention discloses a method for synthesizing electronic-grade ethyl acetate through catalytic esterification of acidic ion exchange resin, and belongs to the technical field of ethyl acetate preparation. The method comprises the following steps: mixing crosslinked polystyrene white balls and a swelling agent, and dropwise adding concentrated sulfuric acid for reaction to obtain S-PS resin; mixing an EDTA disodium salt saturated solution and a polyacrylic acid solution, adding a cross-linking agent and an emulsifier, and carrying out a cross-linking curing reaction to obtain EDTA microcapsules; the preparation method comprises the following steps: dispersing S-PS resin in a solvent, adding EDTA microcapsules, a dehydration condensation agent and a catalyst, reacting under the protection of inert gas, and filtering and recovering after the reaction is finished to obtain S-PS-EDTA resin; mixing glacial acetic acid, absolute ethyl alcohol and S-PS (at) EDTA resin for reaction, and filtering and collecting liquid after the reaction is finished; and rectifying the collected liquid to obtain the product. According to the method provided by the invention, metal impurities can be chelated in the synthesis process, and the electronic-grade ethyl acetate with high purity and low impurity content is produced.
Owner:JINJIANG TAIXING CHEM IND CO LTD +3

Method for coating titanium dioxide on surface of polyoxometallate and application

The invention belongs to the technical field of preparation and application of materials, and particularly discloses a method for coating the surface of polyoxometallate with titanium dioxide and application, and the method comprises the following steps: providing polyoxometallate; according to the method, titanium source injection, inert gas purging, reaction gas injection and inert gas re-purging are used as an ALD cycle, multiple cycles are carried out under the same condition, and the titanium dioxide coating layer is deposited on the surface of polyoxometallate. The obtained titanium dioxide coating layer is compact and uniform, the polyoxometallate and the titanium dioxide coating layer cooperate with each other when the titanium dioxide coating layer is applied to the photocatalytic carbon dioxide reduction reaction, the catalytic activity is remarkably improved, and the defects that existing polyoxometallate is poor in stability, prone to agglomeration and the like are overcome in a targeted mode.
Owner:INNER MONGOLIA UNIVERSITY +2

Alkali metal poisoning resistant SCR catalyst based on sacrificial mechanism and preparation method thereof

The invention discloses an anti-alkali metal poisoning SCR (Selective Catalytic Reduction) catalyst and a preparation method and application thereof, and belongs to the field of catalysts for atmospheric governance, the SCR catalyst comprises the following components in percentage by mass: 80%-90% of TiO2, 0.5%-1.5% of V2O5, 3%-5% of WO3 and 3%-10% of a cocatalyst; the cocatalyst comprises one or two of zirconium phosphate and titanium phosphate. The SCR catalyst provided by the invention is high in targeting property and remarkable in alkali metal poisoning resisting effect. TiO2 is used as a main carrier, V2O5 provides a main catalyst active component, WO3 can improve the thermal stability and acidity of the catalyst, a cocatalyst loses activity after capturing alkali metal, and an effective chemical barrier is constructed by sacrificing the cocatalyst; the path that alkali metal ions continue to diffuse into the coating and react with key V-OH acidic sites is blocked, and the alkali poisoning resistance is qualitatively improved, so that the denitration activity of the catalyst is preserved.
Owner:FANPING BRANCH OF HUANENG GANSU ENERGY DEVELOPMENT CO LTD +2

Sulfur-resistant non-noble metal catalyst for removing carbon monoxide and preparation method thereof

The invention discloses a sulfur-resistant non-noble metal catalyst for removing carbon monoxide and a preparation method thereof. The preparation method comprises the following steps: step 1, dissolving aluminum oxide, cerium-containing metal salt and a precipitator in a solvent, fully mixing, and dispersing to obtain a colloidal dispersion system; a hydrothermal product is obtained after the hydrothermal reaction, and solid powder A is obtained after the hydrothermal product is roasted; step 2, dropwise adding a copper-containing metal salt solution into the solid powder A under a ball-milling condition to obtain a turbid liquid; carrying out heat preservation roasting to obtain solid powder B; 3, roasting the molybdenum-containing metal salt, and performing thermal decomposition to obtain solid powder C; and 4, adding the solid powder C obtained in the step 3 into the turbid liquid of the solid powder B, dispersing, and roasting to obtain the required catalyst. The obtained catalyst is stable in overall structure and can still keep good catalytic performance in a sulfur-containing environment.
Owner:SOUTHWEST JIAOTONG UNIV

Formaldehyde removal catalyst as well as preparation method and application thereof

The invention belongs to the technical field of catalysts, and particularly relates to a formaldehyde removal catalyst and a preparation method and application thereof. The formaldehyde removal catalyst is prepared by carrying out hydrothermal reaction and roasting treatment on a mixture of the following raw materials: metal salts including Mn salt, Co salt and Fe salt; an organic precursor, wherein the organic precursor comprises 2-nitroaniline and carboxymethyl cellulose; wherein the molar ratio of the Mn element to the Co element to the Fe element in the metal salt is (4.5 to 5.0): (2.0 to 2.5): (1.5 to 1.8); the ratio of the total mass of the Mn element, the Co element and the Fe element in the metal salt to the mass of the organic precursor is (80-85): (15-20). According to the formaldehyde removal catalyst, the metal elements are loaded on the hydrophobic carbon layer of the nitrogen-containing structure, so that the problem that the toluene adsorption capacity is weak due to the fact that a traditional catalyst does not have specific sites is solved, and the problem that the catalyst is inactivated due to the fact that multiple pollutants compete for active sites and a product overflows slowly can also be solved.
Owner:HEBEI YUEXIJIA TECH CO LTD

Method for degrading antibiotic pollutants by using boron-carbon co-regulated nanoscale zero-valent iron as activating agent

The invention belongs to the technical field of antibiotic pollutant degradation, and discloses a method for degrading antibiotic pollutants by using boron-carbon co-regulated nanoscale zero-valent iron as an activating agent, which comprises the following steps: step 1, synthesizing carbon-coated nanoscale zero-valent iron, marked as Fe0-C, through a hydrothermal method and a carbothermic method; and step 2, mixing the Fe < 0 >-C obtained in the step 1 with crystal boron, adding the mixture into sewage containing antibiotic pollutants, and then adding persulfate as an oxidizing agent to degrade the antibiotic pollutants. A boron-carbon co-regulation method is adopted to realize the passivation resistance of the nano zero-valent iron in the whole process from preparation, storage to application, and the nano zero-valent iron is applied to the process of activating persulfate to degrade tetracycline.
Owner:XUZHOU UNIV OF TECH

Reforming catalyst

An electric field catalyst that includes: a porous honeycomb substrate; a catalyst layer covering a surface of the porous honeycomb substrate; and a high-resistance layer that is higher in electrical resistivity than the catalyst layer between the honeycomb substrate and the catalyst layer.
Owner:MURATA MFG CO LTD

Hydrogenation catalyst as well as preparation method and application thereof

The invention discloses a hydrogenation catalyst as well as a preparation method and application thereof. The hydrogenation catalyst comprises a carrier and active metal, the carrier is an aluminum oxide core wrapped by a carbon shell, the active metal is Mo and Ni, and on the basis of the weight of the catalyst, the content of MoO3 is 7.5 wt%-15.5 wt%, the content of NiO is 1.5 wt%-4.5 wt%, the content of carbon is 20 wt%-45 wt%, and the content of aluminum oxide is 35 wt%-70 wt%; and the ratio delta 1 of the content of the active metal in the shell layer to the content of the active metal in the core layer is 0.25: 1-0.75: 1. The preparation method comprises the following steps: (1) preparing active metal modified flour; (2) preparing active metal modified pseudo-boehmite microspheres; and (3) rolling the active metal modified flour and the active metal modified pseudo-boehmite microspheres for molding, then carrying out heat treatment, drying and roasting to obtain the hydrogenation catalyst. The catalyst disclosed by the invention has relatively high metal impurity capacity and relatively high Ca, Fe, Ni and V removal capacity, and is suitable for being used as a hydrogenation protection catalyst and a hydrodemetallization catalyst in a residual oil hydrogenation process.
Owner:CHINA PETROLEUM & CHEMICAL CORP +1

SiO2 / Au nanostar / TiO2 composite catalyst, preparation method and application in synthesis of ammonia

The application relates to the field of photocatalytic materials, in particular to a SiO2 / Au nanostar / TiO2 composite catalyst, a preparation method and application in ammonia synthesis. The preparation method comprises the following steps: preparing monodisperse SiO2 microspheres; preparing functionalized modified SiO2 microspheres; preparing Au nanostar loaded SiO2 microspheres; and preparing the SiO2 / Au nanostar / TiO2 composite catalyst. The catalyst has a unique core-shell structure, the core diameter of the Au nanostar is 30-40 nm, the length of the sharp spike is 6-10 nm, and the tip part penetrates into the TiO2 shell layer. In the deionized water system, the catalyst can efficiently and stably catalyze nitrogen reduction to synthesize ammonia under visible light irradiation without adding any sacrificial agent or electrolyte, solves the problems that the existing photocatalytic ammonia synthesis technology depends on an organic sacrificial agent, is easy to corrode equipment, and the catalyst stability is poor, and provides a green, efficient and stable new scheme for synthesizing ammonia.
Owner:ANHUI QINGYAN TESTING TECH CO LTD +1

A method for catalytic hydroprocessing of fuel oil slurry

This invention discloses a method for hydrotreating catalytic cracking slurry. A fixed-bed hydrotreating process is employed, comprising: in the presence of hydrogen, the catalytic cracking slurry sequentially contacts a hydrotreating protectant, a hydrotreating transition catalyst, and a hydrodesulfurization catalyst to undergo a hydrotreating reaction, yielding hydrotreated oil. The hydrotreating protectant comprises an alumina support with a most probable pore size of 40–100 nm, molybdenum oxide, and cobalt oxide. The hydrotreating transition catalyst comprises an alumina support containing additives and MoO3 and CoO. The support has a bimodal pore size distribution, with smaller pores concentrated in the 10–40 nm range and larger pores concentrated in the 150–400 nm range. This method eliminates the diffusion resistance during the adsorption and reaction of large molecules on the catalyst surface during the hydrotreating of catalytic cracking slurry, increases the capacity for more deposits such as coke, extends the operating cycle of the unit, and facilitates hydrodesulfurization and other reactions. It also increases the content of tricyclic and tetracyclic aromatics in the hydrotreated oil, making it a high-quality feedstock for needle coke production.
Owner:CHINA PETROLEUM & CHEMICAL CORP +1

Method for producing a Fischer-Tropsch synthesis catalyst and a Fischer-Tropsch initiation process

The present invention relates to a method for preparing a Fischer-Tropsch synthesis catalyst in which 15 to 40 mole percent of the cobalt is in the form of cobalt oxide. The present invention also relates to a start-up process for a reduced and passivated cobalt-containing Fischer-Tropsch catalyst, wherein 15 to 40 mole percent of the cobalt is in the form of cobalt oxide, and the reduced and passivated catalyst is activated by contacting the catalyst with a synthesis gas stream.
Owner:ビーピーピーエルシー

A high-stability modified manganese dioxide catalyst anode and a preparation method thereof

The application discloses a high-stability modified manganese dioxide catalyst anode and a preparation method thereof. The anode comprises, from bottom to top, a conductive base, a corrosion-resistant conductive layer, a modified manganese dioxide catalyst layer and a silica gel coating layer; the modified manganese dioxide catalyst layer comprises fluorine and metal co-doped nanometer manganese dioxide and carbon materials, the metal is at least one of niobium, bismuth, tin, cerium, lanthanum, cobalt, silver, nickel, platinum, tantalum, ruthenium, iridium and antimony, and the carbon materials comprise graphene and / or carbon nanotubes; the anode has the characteristics of good stability, high current efficiency and long service life, and the preparation method is simple in operation, mild in reaction condition and low in cost, and is favorable for large-scale production.
Owner:HUNAN JIUSHENG NEW MATERIAL TECH CO LTD

Precious metal platinum doped nano zinc oxide photocatalyst, preparation method and application

The invention provides a precious metal platinum-doped nano zinc oxide photocatalyst, a preparation method and application, and relates to the technical field of catalyst synthesis. The method specifically comprises the following steps: pretreating a natural biological material with a hierarchical porous structure as a soft template, and freeze-drying to obtain a Zn < 2 + > supported biological template; placing the template in a mixed solvent, performing microwave hydrothermal synthesis to obtain a ZnO (at) biological template, and performing centrifugal washing; preparing a doping solution containing noble metal ions, dissolving the ZnO (at) biological template in the doping solution containing noble metal ions, and irradiating under ultraviolet light; calcining in an air atmosphere, and then immersing a product into a citric acid solution to obtain the catalyst. By combining a natural biological template with microwave-assisted hydrothermal and in-situ photochemical reduction technologies, uniform doping of ultralow noble metals (Pt, Pd, Au and the like) in a ZnO hierarchical porous structure is realized, and material morphology regulation and control and active site construction are synchronously completed.
Owner:ZHONGYUAN ENGINEERING COLLEGE +1

Catalyst for epoxidation reactions and preparation thereof

PendingUS20260091370A1Catalyst protectionMolecular sieve catalystsEthylbenzene hydroperoxidePtru catalyst
The present invention relates to processes for preparing propylene oxide, comprising reaction of propene with ethylbenzene hydroperoxide in the presence of a catalyst, as well as to catalysts employed in such processes and to methods for their manufacture. The catalysts of the invention are prepared in a process comprising sol-gel-synthesis of catalyst hydrogel-precursor, drying of catalyst hydrogel precursor, calcining of dried catalyst hydrogel-precursor, and optionally hydrophobizing the calcined catalyst hydrogel-precursor. The catalysts of the invention comprise amorphous titanium doped silica comprising pentahedrally coordinated titanium species.
Owner:EVONIK OPERATIONS GMBH +1

A vacant site anchoring all-silicon core-shell monatomic catalyst and a preparation method thereof

The application belongs to the technical field of catalytic chemistry and porous materials, and specifically discloses a kind of vacancy anchoring full-silicon core-shell monatomic catalyst and its preparation method, the application makes Fe highly dispersed in the form of monatomic through the synergistic anchoring effect of silicon vacancy and ligand, avoids the metal oxide cluster produced by traditional impregnation method, inhibits excessive pyrolysis caused by local overheating, reduces the generation of gas impurities such as low-carbon alkane, the crystalline shell layer of the catalyst shortens the diffusion path of the product dimethyl ethylene ketone, DMK molecules can be quickly desorbed and leave the active center after generation, the content of by-product dimers is reduced, the structure of the catalyst improves the feed rate and accelerates the product diffusion, prevents the secondary reaction of reaction intermediates in the pore, greatly reduces the carbon deposition rate, forms a hydrophobic gradient layer by MTES modification, effectively repels the associated by-products isobutyric acid generated in the reaction, blocks the DMK polymerization reaction, thereby maintaining the yield of the target product DMK.
Owner:YIXING HENGXING FINE CHEM

High-activity and high-stability nickel-cobalt alloy catalyst as well as synthesis method and application thereof

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%.
Owner:JILIN UNIVERSITY

Preparation method of hydrogenation protective agent

The invention discloses a preparation method of a hydrogenation protective agent, which comprises the following steps: (1) mixing and grinding flour and IA group hydroxide to obtain a pore forming agent A; (2) uniformly mixing a pore-forming agent A and deactivated catalyst powder, forming, performing pore-forming process on a formed substance, and then drying and roasting to obtain a first material; (3) respectively immersing the first material in an alkaline solution and an acidic solution for first activation treatment, and drying and roasting the activated material to obtain a second material; and (4) carrying out second activation treatment on the second material in a mixed atmosphere of ozone and nitrogen to prepare the hydrogenation protection catalyst. The hydrogenation protective agent is prepared by taking the deactivated catalyst as a raw material, the production cost of the catalyst is greatly reduced, and the catalyst is widely applied to the field of heavy residual oil hydrotreatment.
Owner:CHINA PETROLEUM & CHEMICAL CORP +1

Passivation method of sulfurized hydrogenation catalyst

The invention provides a passivation method of a sulfuration-state hydrogenation catalyst. The passivation method comprises the following steps: step 1, sulfurizing an oxidation-state hydrogenation catalyst; step 2, preparing a saturated solution of the passivator, and controlling the temperature to be 30-45 DEG C; step 3, in an inert atmosphere, impregnating the sulfurized hydrogenation catalyst in the saturated solution of the passivator, cooling the impregnated hydrogenation catalyst to room temperature in the inert atmosphere, and covering the passivator separated out by crystallization on the surface of the hydrogenation catalyst; wherein the passivating agent can be decomposed into a non-oxidizing small molecule compound at the temperature of 50 to 100 DEG C. The specific passivator is adopted, the hydrogenation catalyst is impregnated in the saturated solution of the passivator at a certain temperature, then the hydrogenation catalyst is cooled to the room temperature, and the passivator is crystallized, separated out and covered on the surface and pore channels of the hydrogenation catalyst, so that the catalyst can be isolated from external oxygen, and the effect of preventing the sulfurized hydrogenation catalyst from being oxidized is achieved.
Owner:PETROCHINA CO LTD

A catalyst for reducing nitrogen oxides in flue gas and its preparation and treatment methods

This invention provides a flue gas nitrogen oxide reduction catalyst and its preparation and processing methods, relating to the field of industrial catalysis technology. The flue gas nitrogen oxide reduction catalyst has two functional zones, A and B, arranged sequentially along the flue gas flow direction. Functional zone A is a porous structure located at the inlet end for intercepting dust in the flue gas; functional zone B is located downstream of functional zone A and is the main reaction zone for the catalytic reduction of nitrogen oxides. The flue gas nitrogen oxide reduction catalyst provided by this invention protects the catalytic activity of functional zone B by intercepting dust in functional zone A. This partitioned design synergistically solves the problems of clogging and poisoning, significantly extending the catalyst's lifespan.
Owner:MESTON (TIANJIN) CATALYST CO LTD

Membrane electrode for hydrogen production by alkaline water electrolysis, method for manufacturing the same, and electrolytic cell

The present invention provides a membrane electrode for hydrogen production by alkaline water electrolysis, a method for producing the same, and an electrolytic cell. The manufacturing method according to the present invention is a method of direct coating and hot pressing, which can obtain a membrane electrode in which the catalyst layer is uniform and firmly attached to the surface of the diaphragm, can be given good stability to the membrane electrode, and the obtained membrane electrode has a significantly reduced water electrolysis overpotential. The manufacturing method includes the step of directly coating a catalyst slurry on both sides of a diaphragm, drying it, hot pressing it, and then forming a catalyst layer on each side of the diaphragm to obtain the membrane electrode, wherein the diaphragm is selected from a porous diaphragm or an alkaline anion exchange membrane, the catalyst slurry contains a binder solution and a catalyst, the binder solution is one or more of a perfluorosulfonic acid resin solution and a perfluorosulfonic acid ionomer dispersion, the mass concentration of the binder solution is 5 to 30%, and the mass ratio of the binder solution to the catalyst is 1:1 to 4:1.
Owner:CHINA ENERGY INVESTMENT CORP LTD +1

Method for enhancing firmness of tail gas pollutant treatment catalyst coating

The invention provides a method for enhancing firmness of a coating of a tail gas pollutant treatment catalyst. The method comprises the following steps: S1, drying the tail gas pollutant treatment catalyst of which the coating falls off, and carrying out air pressure purging; s2, nano aluminum oxide is added into deionized water to be dispersed, and nano aluminum sol is obtained; s3, adding the nano aluminum sol into the cerium-containing oxide and dispersing, then adding an organic cobalt compound and dispersing, adding a pH regulator to regulate the pH of the mixed solution to 2-3, and dispersing to obtain composite nano sol; and S4, soaking the tail gas pollutant treatment catalyst into the composite nano sol, fixing one end of the catalyst by using an air seal, and carrying out negative pressure suction, drying and roasting. According to the invention, a layer of porous bonding active film is coated outside the catalyst coating, so that the catalyst coating does not fall off, and the performance is not negatively influenced, thereby avoiding the situations of catalyst scrapping and concession acceptance by customers, reducing the production cost and improving the product percent of pass.
Owner:WUXI WEIFU ENVIRONMENT PROTECTION CATALYST

Passivation method of sulfuration type catalytically cracked gasoline hydrodesulfurization catalyst, passivated catalyst and application of passivated catalyst

The invention provides a passivation method of a sulfuration type catalytically cracked gasoline hydrodesulfurization catalyst, a passivated catalyst and application thereof, and the passivation method comprises the following steps: dissolving an organic peroxide in an organic solvent to form a passivation solution; under the condition of oxygen isolation, adding the sulfuration type catalytically cracked gasoline hydrodesulfurization catalyst into the passivation solution, and carrying out passivation reaction, so as to obtain the passivated catalyst after the passivation reaction is finished. The passivation method provided by the invention has the advantages of simple process and strong controllability, can improve the desulfurization activity of the sulfuration type catalytically cracked gasoline hydrodesulfurization catalyst, and solves the problems of uncontrollable passivation effect, complex startup pretreatment, low active center utilization rate and the like of the existing ex-situ passivation catalyst.
Owner:PETROCHINA CO LTD +1

Preparation method and application of multi-metal supported molecular sieve catalyst

The invention relates to the technical field of catalysts, in particular to a preparation method and application of a multi-metal supported molecular sieve catalyst, an equivalent-volume impregnation method or an ion exchange method is adopted, a metal precursor solution is supported on the surface of a molecular sieve carrier, and a wet precursor is obtained; pre-freezing the wet precursor for 6-24 hours at-50 to-10 DEG C, transferring the pre-frozen wet precursor to a vacuum freeze dryer, and drying the pre-frozen wet precursor for 12-36 hours at-80 to-30 DEG C under the pressure lower than 10 Pa to obtain a dehydrated precursor; the dehydration precursor is impregnated with a third metal element as a structure auxiliary agent by adopting a surface organic chemical method, and the multi-metal supported molecular sieve catalyst is obtained. According to the invention, auxiliary metal can be more effectively distributed on the surfaces or interfaces of the alloy particles on the surfaces of the formed alloy particles; in addition, when the catalyst prepared by the preparation method provided by the invention is applied to the anaerobic coupling reaction of methane, 32% conversion rate and 96% selectivity index have already been in the leading level of the field.
Owner:FUZHOU UNIV

Photocatalyst material with core-shell structure and preparation process thereof

The invention relates to the technical field of photocatalysts, in particular to a shell-core structure photocatalyst material and a preparation process thereof. The shell-core structure photocatalyst material comprises titanium dioxide, an antibacterial composite layer and a silicon dioxide layer, the antibacterial composite layer and the silicon dioxide layer are sequentially coated, and raw materials of the antibacterial composite layer comprise ZIF-based quantum dots, gallic acid and zirconium phosphate. The shell-core structure photocatalyst material provided by the invention improves the problem of insufficient antibacterial performance in the prior art, and the prepared photocatalyst material has long-acting antibacterial performance and structural stability.
Owner:BENCHMARK SMART LIGHTING CO LTD

Environment-friendly metal deactivator and preparation method thereof

The invention discloses an environment-friendly metal deactivator and a preparation method thereof, and relates to the field of petrochemical engineering, and the environment-friendly metal deactivator comprises the following raw materials in parts by weight: 10-15 parts of modified nano magnesium oxide, 10-12 parts of citric acid, 20-25 parts of calcium nitrate and 350-450 parts of water. The modified nano magnesium oxide has strong hydrothermal stability, strong affinity with an FCC catalyst, strong capability of passivating heavy metals nickel and vanadium, effective inhibition of FCC catalyst poisoning, and high environmental protection property.
Owner:GUANGZHOU CHUNYU CHEM TECH CO LTD

Polyazole-derived carbon-coated metal catalysts, preparation and use thereof

The application discloses a polypyrrone-derived carbon-coated metal catalyst and a preparation and application thereof. The catalyst prepared by the application provides a nitrogen-doped carbon layer by polypyrrone, which not only provides protection for an active center, but also promotes electron transmission between carbon layers by the conductive property of the polypyrrone-derived carbon layer itself. The polypyrrone-derived carbon-coated metal catalyst is applied to a catalytic hydrogenation reaction of chloronitrobenzene containing sulfur-containing poisons, and shows excellent activity, selectivity and stability.
Owner:ZHEJIANG UNIV OF TECH

A core-shell metal-organic framework-based UiO-66@SiO2-CN@Pd stabilized Pickering emulsion and its application in catalytic tandem reactions.

This invention relates to the field of catalyst technology, specifically to a core-shell metal-organic framework (MOR) UiO-66@SiO2-CN@Pd stabilized Pickering emulsion and its application in catalytic tandem reactions. The invention uses both water and ethyl acetate as solvents, and UiO-66@SiO2-CN@Pd as an emulsifier to form a UiO-66@SiO2-CN@Pd Pickering emulsion. The functionalized mesoporous silica (SiO2-CN) shell of this emulsifier significantly enhances the stability of UiO-66. The larger mesopore size allows chemical reactants or adsorbates to easily permeate through it. Simultaneously, the hydrophobic modification of the silica shell improves the stability and catalytic activity of the UiO-66@SiO2-CN@Pd emulsion. The preparation method of the UiO-66@SiO2-CN@Pd emulsifier is simple, and it exhibits extremely high catalytic activity in the Suzuki-Knoevenagel tandem reaction.
Owner:LIAONING UNIVERSITY

SCR catalyst end face strengthening structure resistant to ash deposition and abrasion

The invention discloses an anti-ash-deposition and anti-wear SCR catalyst end face strengthening structure which comprises an outer frame which is through up and down and matched with a catalyst assembly, and the catalyst assembly is fixed in the outer frame. An end face supporting plate is fixedly arranged on the windward side of the catalyst assembly, and supporting plate holes in one-to-one correspondence with the air passing holes in the catalyst assembly are formed in the end face supporting plate; airflow channel mechanisms are fixedly connected to the positions, corresponding to the supporting plate holes, of the bottom face of the end face supporting plate; the airflow channel mechanism extends into the air passing hole and is provided with a spiral channel and a separation chamber with a rough inner wall, the spiral channel is used for tangentially guiding the flue gas into the separation chamber, and the inner wall of the separation chamber can intercept fine particles in the flue gas. The end face support plate can resist the impact of flue gas at the first time to protect the catalyst assembly; the spiral channel is matched with the separation chamber with the rough inner wall, so that fine particles can be intercepted, and abrasion of the fine particles carried in the flue gas to the catalyst coating is reduced. And meanwhile, the accumulation of dust at a catalyst pore channel inlet can be greatly reduced.
Owner:SOUTHEAST UNIV

Photoelectrode

The invention relates to the field of photocatalytic hydrogen generation using sunlight and water. It addresses the technical problem of efficiently splitting water into hydrogen and oxygen using a specially designed photoelectrode. The photoelectrode comprises a semiconductive photo-harvester containing e. g. metal silicide, an oxidation cocatalyst with magnesium tin oxide, and a reduction cocatalyst of cobalt, nickel, and manganese alloys. The manufacturing method includes preparing a silicon-based photosensitive material, applying protective and anti- reflective coatings, and bonding the cocatalysts using techniques like sputtering. The photoelectrode is used in a transparent container filled with water and exposed to sunlight to generate hydrogen and oxygen, which can be collected and stored for energy applications, such as fuel cells. This invention aims to provide a renewable and environmentally friendly method for hydrogen production, overcoming challenges related to material stability and water impurities.
Owner:E&W WIRTSCHAFTSKANZLEI GMBH