5685results about "Catalyst carriers" patented technology

This invention relates to processes for the assembly of three-dimensional structures having periodicities on the scale of optical wavelengths, and at both smaller and larger dimensions, as well as compositions and applications therefore. Invention embodiments involve the self assembly of three-dimensionally periodic arrays of spherical particles, the processing of these arrays so that both infiltration and extraction processes can occur, one or more infiltration steps for these periodic arrays, and, in some instances, extraction steps. The product articles are three-dimensionally periodic on a scale where conventional processing methods cannot be used. Articles and materials made by these processes are useful as thermoelectrics and thermionics, electrochromic display elements, low dielectric constant electronic substrate materials, electron emitters (particularly for displays), piezoelectric sensors and actuators, electrostrictive actuators, piezochromic rubbers, gas storage materials, chromatographic separation materials, catalyst support materials, photonic bandgap materials for optical circuitry, and opalescent colorants for the ultraviolet, visible, and infrared regions.

A honeycomb structural body comprising: a ceramic block having a flat shape in which a plurality of honeycomb units are bonded to each other through a sealing material layer, said honeycomb unit mainly comprises porous ceramic and includes a large number of through holes placed in parallel with one another in a longitudinal direction with a partition wall interposed therebetween; and a sealing material layer formed on a peripheral portion thereof, wherein the sealing material layer among the honeycomb units on a cross section perpendicular to the longitudinal direction has a pattern that is formed in a diagonal direction with respect to a major axis of a shape forming a contour of the cross section.

Graphitic nanotubes, which include tubular fullerenes (commonly called "buckytubes") and fibrils, which are functionalized by chemical substitution, are used as solid supports in electrogenerated chemiluminescence assays. The graphitic nanotubes are chemically modified with functional group biomolecules prior to use in an assay. Association of electrochemiluminescent ruthenium complexes with the functional group biomolecule-modified nanotubes permits detection of molecules including nucleic acids, antigens, enzymes, and enzyme substrates by multiple formats.

The invention relates to a catalyst for dehydrogenating propane to prepare propone, which uses thermal-resistant oxide as carrier, uses palladium-group metal as main catalyst, uses IV A group metal and rare-earth metal as agents, uses halogen as modifier, and uses inorganic oxide with high temperature resistance as adhesive. The inventive catalyst under high temperature and low pressure has higher propane transfer rate, propone selectivity and reaction stability. And the preparation comprises that at 60-100Deg. C, immerging thermal-resistant oxide with rare-earth metal water solution for 2-10h, at 60-180Deg. C baking for 2-10h, at 400-600Deg. C baking for 3-10h, immerging said carrier and the water solution which contains palladium metal and IVA metal at 60-100Deg. C for 2-10h, and baking for 2-10h at 60-180Deg. C, adding adhesive, protruding agent and acid gel solvent, protruding and shaping, baking for 2-10h at 60-180Deg. C, activating for 3-10h at 400-600Deg. C, and reducing for 2-10h in hydrogen flow at 400-600Deg. C.

The invention discloses a manufacturing method for aluminium dioxide, blends two kinds of different thin water aluminium wafer powder evenly, and then carries on dissolving and forming, drying, baking and gets the aluminum oxide. The first kind of thin water aluminum mine has a hole capacity of 0.50ml / g~0.80ml / g, the proportion accounts for 5w%~50w% of Al2O3 . the hole capacity of the second aluminum mine is about 0.85ml / g ~1.50ml / g. There has no contamination by using the method; the diameter of the carrier is in the range of 6nm~35nm and 100nm~2000nm; the carrier can be used as carrier of protection agent in heavy oil producing, metal eliminating catalyst and so on.

The invention relates to a nanometer hole metal-organic frame material in a single-level or multilevel pore canal structure as well as a preparation method and the application thereof. The preparation method comprises the following steps: at least one metal salt and at least one polyfunctional group organic ligand reacts with at least one template agent in at least one solvent under the condition that no hole aid agent exists or only one hole aid agent exist, and single-level or multilevel nanometer holes or channels with the size of 0.5-100 nm exist in at least one direction in the internal space of the obtained metal-organic frame solid. The nanometer hole metal-organic frame material with large hole size and the nanometer hole metal-organic frame material in the layered multilevel pore canal structure can be obtained without the synthesis of the large-size organic ligand and have wide applications.

The invention discloses a heavy oil hydrogenation catalyst and a preparation method thereof. The heavy oil hydrogenation catalyst comprises a carrier and an active ingredient; the carrier is aluminum oxide, and is prepared from pseudo-boehmite with dry basis content below 50% via moulding; the active ingredient are metals selected form family VIII, Co or Ni, and / or family VI B, Mo or W. The preparation method comprises following steps: preparation of pseudo-boehmite, preparation of the carrier, and loading of the active ingredient. The heavy oil hydrogenation catalyst is capable of maintaining high demetalization, desulphurization, and carbon residue removing activities, simplifying drying process of pseudo-boehmite preparation, avoiding dust pollution caused by moulding process, increasing production efficiency, reducing production energy consumption, and reducing catalyst cost further.

The invention provides an activated alumina and activated carbon compounded material and a preparation method thereof. According to a formula, the material comprises the following raw materials in percentage by mass: 40 to 99 percent of aluminum hydroxide, 1 to 60 percent of activated carbon, and 15 to 35 percent of binder. The material is prepared by uniformly mixing, pelleting, ageing, molding, airing, sintering, rinsing, drying and the like. The invention aims to compound the activated carbon with the activated alumina; on the one hand, the material with a certain shape can be processed, the defects of loose shape, low strength, difficult recovery and the like of the activated carbon are overcome, and the material is easy to recycle; and on the other hand, the adsorption property of the activated alumina material is greatly improved. The method has the advantages of simpleness, practicality, readily available raw materials, low cost and suitability for industrial mass production, and can be widely applied to various fields such as industry, agriculture, environmental protection, air purification, water treatment and the like.

The invention relates to a modified loading nano composite photocatalyst which takes titanium dioxide as main part and adopts new reaction technique to degraded the organic industrial wastewater in a water processing system (see attached drawing 1 in Instruction). The main point on preparing the catalyst lies in that titanium dioxide active compounds loaded on different carriers are employed to prepare a loading photocatalyst with grain diameter of 5-40nm; meanwhile, different elements are mixed into the loading photocatalyst to reduce the composition between photoproduciton electron and cavity, which enables the catalyst to move the light absorbing wavelength thereof towards the visible regions, thus effectively improving the degradation rate of organic pollutants as a new environmental-friendly catalyst. As to the new technique of processing the organic industrial wastewater, the invention overcomes the defects that the present photocatalysts are only used for degrading the organic industrial wastewater with low concentration. The catalyst being irradiated respectively or simultaneously under sunbeam and ultraviolet light can decrease COD values of high-concentration organic industrial wastewater from 10000-40000mg / L to less than 100mg / L in short time, thus meeting the national emission standard.

This invention relates to a stable composite material comprising a support member that has a plurality of pores extending through the support member, and a macroporous crosslinked gel that is located in, and fills, the pores of the support member, in which crosslinked gel is entrapped a stabilising polymer, which stabilising polymer is neutral, linear or branched, non-crosslinked, and substantially water-insoluble. The presence of the stabilising polymer is such that it allows the composite material to largely retain its porosity and morphology after being dried. The invention also relates to a process for preparing the stable composite material described above, and to its use. The stable composite material is suitable, for example, for separation of substances, for example by filtration or adsorption, including chromatography, for use as a support in synthesis or for use as a support for cell growth.

A stabilized catalyst support having improved hydrothermal stability, catalyst made therefrom, and method for producing hydrocarbons from synthesis gas using said catalyst. The stabilized support is made by a method comprising treating a crystalline hydrous alumina precursor in contact with at least one structural stabilizer or compound thereof. The crystalline hydrous alumina precursor preferably includes an average crystallite size selected from an optimum range delimited by desired hydrothermal resistance and desired porosity. The crystalline hydrous alumina precursor preferably includes an alumina hydroxide, such as crystalline boehmite, crystalline bayerite, or a plurality thereof differing in average crystallite sizes by at least about 1 nm. The crystalline hydrous alumina precursor may be shaped before or after contact with the structural stabilizer or compound thereof. The treating includes calcining at 450° C. or more. Preferred structural stabilizers can include cobalt, magnesium, manganese, manganese, zirconium, boron, aluminum, barium, silicon, lanthanum, oxides thereof, or combinations thereof.

A shift converter (16) in a fuel processing subsystem (14, 16, 18) for a fuel cell (12) uses an improved catalyst composition (50) to reduce the amount of carbon monoxide in a process gas for the fuel cell (12). The catalyst composition (50) is a noble metal catalyst having a promoted support of mixed metal oxide, including at least both ceria and zirconia. Cerium is present in the range of 30 to 50 mole %, and zirconium is present in the range of 70 to 50 mole %. Additional metal oxides may also be present. Use of the catalyst composition (50) obviates the requirement for prior reducing of catalysts, and minimizes the need to protect the catalyst from oxygen during operation and / or shutdown.

The invention discloses a diesel oil hydrogenation pour point depressing method. A series flow of hydrofining and hydrogenation pour point depressing is adopted in the method, wherein a hydrogenation pour point depressing catalyst is modified by metal auxiliary agent and silicon, effectively regulates the acidity and orifice shape of the inner surface and the outer surface of a shape-selective cracking molecular sieve, is favorable for dispersing wax molecules in a diesel oil raw material into pore canals of the molecular sieve to perform shape-selective cracking reaction, and has high catalytic activity and selectivity of a target product; and because the acidity of the outer surface of the molecular sieve is weak, side reactions such as secondary cracking and the like are reduced, the pour point depressing effect of the diesel oil is good, and the fraction yield of the diesel oil is high.

The invention discloses an aluminum oxide-activated carbon composite carrier, a preparation method and a prepared catalyst. The carrier is characterized by having a specific surface area of 70 to 300 m<2> / g, a most probable pore diameter of 3 to 25 nm and the side compression strength of 80 to 200 N / mm; the activated carbon content of the carrier is 10 to 30 mass percent, while aluminum oxide content is 70 to 90 mass percent; and the carrier is prepared by kneading, molding and calcining aluminum oxide, activated carbon and an auxiliary material. The hydrogenation and desulfurization catalyst is prepared by loading Ni-Mo or Co-Mo or Ni-W onto the carrier by an impregnation method. The carrier of the invention has a well-developed mesopore structure and high mechanical strength. The catalyst of the invention has hydrogenation and desulfurization activity higher than that of the catalyst prepared by taking the aluminum oxide and the activated carbon independently as the carriers.

The invention discloses an active alumina / active carbon composite material and a preparation method thereof. The composite material comprises the following ingredients: 70-90 weight portions of sludge, 10-30 weight portions of active carbon, and 15-35 weight portions of binder, and is prepared by uniformly mixing, pelleting, aging, molding, drying in the air, sintering, rinsing and drying. Using sludge as raw material has an important meaning to environmental protection and recycling of waste. The invention has the advantages of simple preparation method, easy obtainment of raw material, and low cost, and can be widely applied in the fields of industry, agriculture, environmental protection, air cleaning, water treatment and the like.

An integral de-nitrating catalyst SCR with dual oxides as carrier for removing NOx from fume is characterized by that the cellular cordierite ceramic is used as skeleton, its composite carrier is composed of Al2O3 as internal layer and TiO2 as external layer, and its active component consists of V2O5 and WO3. Its advantages are high activity, wide active temp window, and high effect and mechanical stability.

The invention discloses preparation methods for a macroporous alumina carrier and a hydrodemetallization catalyst. The preparation method for the macroporous alumina carrier includes the following steps: (1) dry pseudoboehmite gel powder is hydrothermally processed under high pressure; (2) the dry pseudoboehmite gel powder obtained in step 1 is kneaded into a plastic, and pore-expanding agent is added in step 1 or step 2; (3) the plastic obtained in step 2 is shaped, the shaped material is dried and baked, and thereby the macroporous alumina carrier is obtained. The impregnation method is adopted to prepare the hydrodemetallization catalyst. The hydrodemetallization catalyst prepared by the method has large pore volume and pore diameter, centrally distributed pores, moderate mechanical strength and high activity and activity stability.

A composite oxide catalyst for removing NOx from the tail gas generated by combustion through low-temp selective catalytic reduction reaction in which ammonia gas or urea is used as reducing agent for reducing the NOx into N2 and H2O is prepared from a composite metallic oxide (whose main component is manganese oxide) and a porous inorganic oxide as carrier through citric acid complexing method.

The invention involves alumina carrier used for Ag catalyst which is used for produce epoxyethane with oxygenizing ethane and its preparation method the Ag catalyst prepared by the carrier, and relates to the usage of the catalyst in ethane oxygenizes epoxyethane. The preparation method mixes three-hydratedalpha-aluminum oxide with certain particle size, hydratedalpha-aluminum oxide, certain amount of inflammable carbonaceous material, fluxing agent, fluoride and optional heavy alkaline earth metal compounds, adds admixture and water after mixing uniformly, kneading uniformly, squeezing and shaping, then preparingalpha-alumina carrier after drying and roasting. The specific surfaceof the invention is 0.2- 2.0m2 / g, the hole volume is 0.35-0.85ml / g, water absorption ratio>=30%, crushing strength is 30-120N / particle. The carrier is dipped by the solution of silver ammine complex, alkaline metal compound and alkaline earth metal compound, and prepares the Ag catalyst for epoxyethane with oxygenizing ethane after drying and activating.

The invention provides mesoporous spherical alumina and a method for preparing the mesoporous spherical alumina by guiding of a template. By the adoption of an oil column forming method, the template with a guiding function is added into aluminum sol during the aluminum sol preparation process; and during the forming and aging processes of the aluminum sol, due to the existence of the template with the guiding function, a large number of meso-structures are prepared in alumina balls. The mesoporous spherical alumina has the following characteristics of: its specific surface is 150-300 m<2> / g; particle diameter is 0.1-5 mm; pore volume is 0.7-1.5 ml / g; holes, hole diameter of which is 2-40 nm, are greater than 97%; bulk density is 0.30-0.80g / cm<3>; and crushing strength is 70-250 N / granule. The mesoporous spherical alumina can be used as a catalyst or a catalyst carrier in the petrochemical industry and the industry of fine chemicals.

This invention relates to processes for the assembly of three-dimensional structures having periodicities on the scale of optical wavelengths, and at both smaller and larger dimensions, as well as compositions and applications therefore. Invention embodiments involve the self assembly of three-dimensionally periodic arrays of spherical particles, the processing of these arrays so that both infiltration and extraction processes can occur, one or more infiltration steps for these periodic arrays, and, in some instances, extraction steps. The product articles are three-dimensionally periodic on a scale where conventional processing methods cannot be used. Articles and materials made by these processes are useful as thermoelectrics and thermionics, electrochromic display elements, low dielectric constant electronic substrate materials, electron emitters (particularly for displays), piezoelectric sensors and actuators, electrostrictive actuators, piezochromic rubbers, gas storage materials, chromatographic separation materials, catalyst support materials, photonic bandgap materials for optical circuitry, and opalescent colorants for the ultraviolet, visible, and infrared regions.

The selectivity and activity of a silver-based olefin epoxidation catalyst is found to be a function of the pore size distribution in the alumina carrier on which it is deposited. Specifically it is found advantageous to provide a carrier which has a minimum of very large pores, (greater than 10 micrometers) and a water absorption of 35 to 55% and a surface area of at least 1.0 m2 / g. A method of making such carriers is also described.

The invention relates to a novel preparing method for an in-situ nitrogen-doped porous carbon material, the application of the in-situ nitrogen-doped porous carbon material serving as a carrier of a load type catalyst, the load type catalyst comprising the in-situ nitrogen-doped porous carbon material, and the application of the load type catalyst in the water phase alcohol condensation reaction. Cheap micromolecule nitrogen substances serve as a nitrogen source of the in-situ nitrogen-doped porous carbon material, nitrogen atom in-situ doping is achieved in the carbon material preparing process, the doping content of the in-situ nitrogen-doped porous carbon material is controllable, the in-situ nitrogen-doped porous carbon material is distributed evenly, the dispersity of metal in the carrier and the combining strength with the carrier can be improved through doping of nitrogen atoms, and therefore the catalytic activity of the nitrogen-doped porous carbon material can be improved, and the service life of the nitrogen-doped porous carbon material can be prolonged.

The invention relates to an active carbon serving as a catalyst carrier and a treatment method and application thereof. After being subjected to heating and dipping treatment in hydrogen peroxide, the specific surface area of the active carbon is 900 to 1,300m<2> / g and the mesopore distribution ratio is 20 to 30 percent. The treatment method has short treatment time and high speed, is convenient to operate and is easy to realize. The micropore size distribution and the micropore surface charge reorganization of the treated active carbon adsorptive catalyst are well improved. The active carbon treated by the method is suitable for serving as the carrier of a synthesis catalyst for the industrial production of vinyl acetate.

The invention discloses a hydrocracking catalyst carrier and a preparation method thereof. The catalyst carrier comprises a modified Y-type molecular sieve, amorphous silica-alumina and alumina, wherein the modified Y-type molecular sieve is Y-type molecular sieve treated by mixed aqueous solution of an aluminum salt and an acid and by hydrothermal process. In the carrier, the modified Y-type molecular sieve has a high crystallinity, high silicon to aluminum ratio and proper total acidity and acid distribution and can form an acid component with the amorphous silica-alumina. Therefore, the carrier is particularly suitable for serving as a hydrocracking catalyst carrier to improve the activity of a hydrocracking catalyst and the selectivity of middle distillates.

A catalyst for residual oil hydrodemetalling, which is composed of a carrier containing two types of pores and metal components such as Mo and / or W and Co and / or Ni, fixes on the carrier. The distribution of the pores in the said carrier is: the volume percentage of 10-20nm diameter pores in the total pore volume is 35-80%, the volume percentage of 500-1200nm diameter pores in the total pore volume is 15-60%, and the volume percentage of the pores with diameters ú“10nm, ú¥20-ú“500nm and ú¥1200nm in the total pore volume is 5-40%. The process for preparing the carrier comprises the steps of: mixing an alumina precursor with a nonacid nitrogenous compound, molding and sintering. The catalyst in this invention can be used as the catalyst for crude oil and normal atmosphere residual oil hydrodemetalling.

A cellular metallic wire net carrier with coated aluminum oxide layer is composed of a metallic carrier and a coated layer and has an internal 3D through structure. Its preparing process includes such steps as preparing the planar metallic wire nets and corrugated metallic wire nets from stainless steel wire, pre-treating, preparing electric depositing liquid from gamma-Al2O3 powder, electric depositing to form a coated aluminum oxide layer on said metallic wire nets, stacking them in stagger mode, and binding them together by the strips of metallic wire net.

The invention discloses an alumina carrier and a preparation method thereof. In the alumina carrier, aluminum hydroxide gel prepared by a molten salt supersolubilizing micelle method is taken as a raw material. After a surfactant and a hydrocarbon component contained in the gel are molded and baked, nano-alumina particles formed by removing water from the polymerized aluminum hydroxide still have a basic rod-shaped structure and are piled up in an unordered way so as to form a frame structure. The alumina carrier has the characteristics of large pore volume, large pore diameter, high porosity, large orifice on the outer surface and high pore canal penetrability. In particular for macromolecules, the alumina carrier prevents catalyst inactivation caused by the blocking of an ink bottle-shaped orifice, so that impurity deposition is increased, and the running period of a catalyst is prolonged. The alumina carrier can be applied to a catalytic reaction which contains a macromolecule reactant or a macromolecule product.