68results about How to "Concentrated pore size distribution" patented technology

The invention discloses a preparation method of a catalyst for hydrogenation desulfurization and denitrification of light-weight oil and is characterized in that the composition of the catalyst comprises a carrier, an auxiliary agent and active metals, wherein the carrier contains aluminum oxide, titanium oxide and silicon oxide; the auxiliary agent is phosphorus; the active metals are oxides of nickel, molybdenum and tungsten; and on the basis of the catalyst, the contents of all components in percentage by weight are as follows: 1 to 4 percent of cobalt oxide, 3 to 10 percent of nickel oxide, 2 to 12 percent of molybdenum oxide, 18 to 30 percent of tungsten oxide, 2 to 5 percent of phosphorus pentoxide, 2 to 15 percent of titanium oxide, 2 to 20 percent of silicon oxide, and the balance of aluminum oxide. The catalyst is obtained by the steps of carrier preparation, co-immersion, calcination and the like.

The invention relates to a high temperature resistance basalt fiber composite filter material and a preparation method thereof; the composite filter material comprises basalt fiber base fabric and high-performance fiber mesh in a weight ratio of 7:1-2:1; the preparation method comprises the following steps: forming high-performance fiber mesh on the basalt fiber base fabric, combining and strengthening the material more by spunlaced process, hot rolling the material, then soaking the material in water repellent oil-proofing agent, sizing and obtaining the finished product. The filter material of the invention has the advantages of stable structure, high filtration accuracy, small bore diameter, concentrated pore diameter distribution and high temperature resistance, can bear 450 DEG C of instantaneous high temperature and can be used stablely for long time below 280 DEG C.

The invention relates to a nanometer grid, a nanometer polymer grid material and their preparation method and use method and belongs to the field of a photoelectric high and new technology. The nanometer polymer grid material is a homopolymer or copolymer utilizing the nanometer grid as a monomer and has a general structural formula shown in the following description. The nanometer polymer grid material has the characteristics that 1, the nanometer grid monomer has hole and semiconductor photoelectric characteristics, 2, raw materials are cheap and easily available, reaction conditions are mild and operation is easy, 3, the nanometer polymer grid material has excellent mechanical characteristics, 4, the nanometer polymer grid material has good solubility and is convenient for nanometer film or fibration processing, and 5, a rigid skeleton has the advantages of high glass-transition temperature, high heat, electrochemical stability and spectrum stability. The nanometer polymer grid material can be used as a novel nanometer polymer photoelectric material and has a good application prospect in the fields of organic electrons, spinning electrons, photoelectrons, mechano-electronic and nano-biology.

The invention discloses a preparation method and application of biomass-derived ultra-high specific surface area activated carbon and belongs to the technical field of preparation of a carbon material and a lithium-sulfur battery. The preparation method utilizes biomass waste palm shells as carbon sources, comprises simple processes such as carbonization, activation, rinsing and drying and can produce the biomass-derived ultra-high specific surface area activated carbon. Concretely, the preparation method comprises mixing activated carbon and sulfur for a sulfur attachment reaction to obtain a palm shell activated carbon-sulfur composite material, mixing the palm shell activated carbon-sulfur composite material, conductive carbon black and polyvinylidene fluoride, dissolving the mixture in nitrogen-methylpyrrolidone to obtain mixed slurry, coating aluminum foil with the mixed slurry and carrying out drying to obtain a positive electrode material of a lithium-sulfur battery. The activated carbon has a high specific surface area, concentrated pore size distribution, high adsorption performances and high electrochemical performances.

The invention provides modified active carbon, and a preparation method and application thereof, belonging to the field of preparation of catalyst carriers. The preparation method comprises the following steps: subjecting graphitized active carbon to treatment with HNO3 and then carrying out high-heat treatment in an ammonia gas atmosphere so as to obtain an active carbon carrier with high mesoporosity. The carrier has the characteristics of a great pore volume, high mesoporosity (no less than 97%), good conductivity, etc. When used as a carrier for an ammonia-synthesis catalyst, the carrier can substantially improve the dispersity of the precious metal ruthenium and improves anti-methanation capability, heat stability and activity of the catalyst. The carrier has wide application prospect in the field of catalysis.

The invention relates to a catalyst carrier prepared from mixed aluminum oxide and mesoporous molecular sieve and a preparation method thereof. The mixed mesoporous carrier is prepared by the following steps of: adding the mesoporous molecular sieve and various auxiliary agent into a conventional aluminum oxide source; performing mixing and extrusion moulding; and then performing hydrothermal treatment, drying and roasting to finally obtain a finished product dehydrogenation catalyst carrier. The prepared light alkane dehydrogenation catalyst carrier has high mechanical strength, good thermal stability and enhanced catalysis activity.

The invention relates to a preparation method and application of a porous carbon material co-doped with N, S and P, and belongs to the technical field of production of a supercapacitor electrode material. The preparation method comprises the steps of heating and pre-processing a dried honeycomb in a nitrogen environment, and performing cooling and smashing to obtain a honeycomb carbonized powder; performing drying after uniformly mixing the honeycomb carbonized powder and an activating agent, heating and activating the mixture under a condition of nitrogen atmosphere, bleaching the product to a neutral condition after cooling, and performing drying to obtain the porous carbon material co-doped with N, S and P. The porous carbon material co-doped with N, S and P is rich in raw material and low in cost and can be recycled; and moreover, an absorbent can be used for the absorption and separation process of an air-liquid pollutant, control of air pollution and water pollution is facilitated, and the win-win effect of utilizing solid waste and controlling air pollution and water pollution is obtained.

The invention discloses a hydrocracking method which comprises the following steps that a straight-run diesel oil raw material is in contact with a hydrocracking catalyst to carry out hydrocracking reaction, and an obtained hydrocracking product is separated to obtain heavy naphtha, diesel oil, a jet fuel and hydrogenation tail oil, wherein the used hydrocracking catalyst adopts a modified Y-shaped molecular sieve, amorphous silica-alumina and aluminum oxide as carriers, and the modified Y-shaped molecular sieve is an Y-shaped molecular sieve which is rich in meso pores and is concentrated in effective pore size distribution. The hydrocracking method is particularly suitable for a hydrocracking technology for carrying out hydro-conversion on straight-run diesel oil to produce the jet fuel, and has very high catalytic activity and aviation fuel product yield and the quality of a product is improved.

The invention discloses a mesoporous carbon material loaded cobalt-based catalyst and a preparation method thereof, and belongs to the technical field of metal catalysts. The preparation method of thecobalt-based catalyst comprises the steps: (1) dissolving Co(NO3)2.6H2O in an absolute ethyl alcohol solution; (2) immersing a mesoporous carbon material GMC into the solution obtained in the step (1), and evaporating in a rotary evaporator to obtain a mixture; and (3) putting the mixture obtained in the step (2) into a drying oven, and drying; and calcining to obtain the catalyst. The catalyst provided by the invention is higher in graphitization degree, more uniform in CoO particle dispersion, higher in CO conversion rate, lower in CO2 generation rate and better in C5+ selectivity.

The invention provides a supported cobalt-based catalyst for Fischer-Tropsch synthesis. The supported cobalt-based catalyst is composed of cobaltosic oxide, an oxide of a precious-metal aid, an oxide of a non-precious-metal aid and a tungsten carbide carrier in a weight ratio of (10-80): (0-3): (0-20): 100. The supported cobalt-based catalyst has the advantages of high mechanical strength and good thermal conductivity.

The invention discloses petroleum coke-based activated carbon and a preparation method thereof. The activated carbon has a specific surface area of 2000-3500m<2>/g, a pore volume of 0.8-1.5 cm<3>/g, an iodine adsorption value of 2000-3000mg/g and a methylene blue adsorption value of 300-650mg/g. The preparation method comprises the following steps: introducing ammonium phosphate into petroleum coke, drying and then pretreating; mixing the obtained sample with an activating agent, activating after uniformly mixing, and finally washing and drying to obtain the activated carbon. The activated carbon has the advantages of high specific surface area, high pore volume, centralized pore size distribution, excellent adsorption performance and the like, and is low in production cost and small in environmental pollution.

A ZrO2 - SiO2 composite oxides includes 85~98 wt% ZrO2 and 2-15wt% SiO2, the most probable aperture is 3-8nm and at least diameter of 90% hole is 3~8 nm, hole structure is the cylinder-shaped hollow structure; and the specific surface area of BET is 120 to 150 m 2/g, the index H0 of acid strength Hammet is -8.4--5.6. Said preparation method of ZrO2 - SiO2 includes: adding silicon-containing compound and surface activator into zirconium-containing compound solution under the condition of continuous stirring to form mixture, then adding alkaline solution into said mixture under the condition of continuous stirring to form sol, after ageing, washing and filtering the sol and preparing gel, then producing the ZrO2 - SiO2 solid after drying and roasting gel. The activator using the composite oxide as carrier is used for transfer reaction of pseudocumene and toluene alkyl group and has higher pseudocumene conversion rate and better dimethylbenzene selective.

The invention relates to a preparation method of a TiO2/Al2O3 composite carrier, which relates to a preparation method of a general carrier of a catalyst. The preparation method of the TiO2/Al2O3 composite carrier comprises the following steps of: firstly, dissolving butyl titanate in absolute ethyl alcohol; stirring the solution, and adding glacial acetic acid to the solution; standing the solution, then adding deionized water into the solution, and then carrying out heat treatment on the solution; and after the deionized water is added to the solution, slowly adding gamma-Al2O3 powder to the solution, and then performing heat treatment on the solution. The TiO2/Al2O3 composite carrier prepared through the method has large specific surface area and pore volume and can ensure that pore diameter distribution is more concentrated; and TiO2 in the TiO2/Al2O3 composite carrier is not subjected to a local concentration phenomenon and is greatly uniformly dispersed on the surface of Al2O3.

The invention provides a preparation method of an iron or copper oxide pillared layered manganese oxide low-temperature denitration catalyst. The method mainly uses a shared precursor method. Throughhydroxide preparation, hydroxide oxidization, suction filtration and washing, drying and roasting preparation, the iron or copper oxide pillared layered manganese oxide low-temperature denitration catalyst is obtained. The low-temperature denitration catalyst has the advantages that the active temperature window is low; the denitration efficiency is high; the method is applicable to the SCR (selective catalytic reduction) method low-temperature denitration technology.

The invention discloses a soft high-temperature-resistant polypropylene foam material and a preparation method thereof. The soft high-temperature-resistant polypropylene foam material comprises 100 parts of co-polypropylene resin, 10-20 parts of polyolefin block copolymer resin, 5-15 parts of high-density polyethylene resin, 1-3 parts of low-molecular-weight polytetrafluoroethylene and 1-4 parts of a foaming agent. The method comprises the following steps of: melting and mixing copolymerized polypropylene resin, polyolefin block copolymer resin, high-density polyethylene resin, a foaming agentand low-molecular-weight polytetrafluoroethylene, and extruding from an extruder to obtain a sheet; and sequentially feeding the cross-linked sheet into a preheating section, a foaming section and acooling shaping section of equipment for foaming to obtain the foam material. The soft high-temperature-resistant polypropylene foam material is low in compression set and low in compression strength,so that the foam material is soft enough; meanwhile, under the high-temperature condition, the heat-resistant dimension change rate (transverse/longitudinal) reaches -0.8%/-1.4%, and the foam material has both softness and heat resistance.

The invention provides a preparation method of an activated wood carbon fiber. The preparation method of the activated wood carbon fiber comprises immersing wood into phosphate solution, then drying the immersed wood, and performing carbonization under protection of nitrogen and then activation with vapor to obtain the activated carbon fiber. By taking word processing residues as the raw materialand directly performing carbonization and activation directly without processes of extraction of cellulose or lignin to obtain the activated carbon fiber, the preparation method of the activated woodcarbon fiber is simple and rapid in preparation processes and low in production cost; the prepared activated carbon fiber is large in specific surface area and applicable to wastewater adsorption.

The invention discloses a hydrocracking catalyst and a preparation method thereof. The hydrocracking catalyst takes a modified Y-type molecular sieve which contains rich mesopores and has intensive effective pore diameter distribution as an acidic component; the modified Y-type molecular sieve has the following characteristics: the relative crystallization degree is 110 percent to 150 percent, the mol ratio of SiO2/Al2O3 is 10 to 50, the lattice parameter is 2.436nm to 2.445nm, the total pore volume is 0.55mL/g to 1.0mL/g and the mesopore pore volume accounts for 70 percent of the total pore volume or more. The hydrocracking catalyst disclosed by the invention is suitable for being used in a hydrocracking process of increasing the yield of high-quality heavy naphtha and has relatively high catalytic activity and product selectivity.