79results about How to "Large hole volume" patented technology

The present invention relates to a catalyst for ortho-parahydrogen conversion suitable for a wide range of low-temperature conditions and a preparation method thereof. The catalyst is a fiber magnetic catalyst FeMnOx doped with Fe atoms in an orderly manner; the base material of the catalyst is α-MnO2, the α-MnO2 belongs to the tetragonal system, the unit cell parameter is #imgabs0#, the crystal structure is composed of 2×2 octahedral chains with shared edges, the XRD characteristic diffraction peaks are 2θ=12.8°, 18.1°, 25.7°, 37.5°, 49.8°, 56.3°, and the specific surface area measured by the BET test method is 100-150m 2 / g, and transmission electron microscopy shows that its microstructure is a fibrous structure with a diameter of 2 to 5nm and a length of 100nm to 500nm; when the catalyst is used for the ortho-parahydrogen conversion reaction, the ortho-parahydrogen conversion efficiency is more than 95%, and the catalyst life is more than 1400h; the wide range of low temperature conditions is 23K-77K. The coordination of Fe atoms with lattice oxygen in α-MnO2 can effectively avoid the deactivation of the catalyst caused by the change of the valence state of the metal component, thereby enhancing the stability and life of the catalyst, and is suitable for industrial-scale production.

The invention discloses a method for improving the fast charging performance of a silicon-carbon composite material, and the method comprises the following steps: firstly preparing a heteroatom-doped MOF material, then precipitating by a silane cracking method, introducing silane gas and heteroatom gas, and carrying out low-temperature passivation to obtain a silicon-carbon precursor material; the preparation method comprises the following steps: preparing an organic solvent of resin, adding a graphene oxide solution, uniformly dispersing, adding a silicon-carbon precursor, performing spray drying, and introducing hydrogen at 700-1000 DEG C to reduce the obtained material. The obtained material can improve the rate capability and the cycle performance.

The invention provides novel waterproof phase change thermal insulation mortar and a preparation method thereof, and relates to the technical field of mortar building materials, the novel waterproof phase change thermal insulation mortar is prepared from the following raw materials by weight: 500 parts of ordinary Portland cement, 150 parts of water, 250-450 parts of fine sand, 50-200 parts of a shape-stabilized phase change material, 5-15 parts of a polycarboxylic acid water reducer, and 1-5 parts of polysorbate. The diatomite is treated by adopting a three-step method of calcination, acid pickling and hydrophobic modification, so that on the basis of reducing impurities and increasing the pore volume, the diatomite is modified from hydrophilicity to hydrophobicity and lipophilicity, the adsorption capacity of the diatomite to n-hexadecane is further enhanced, and the enthalpy and volume stability of the shape-stabilized phase change material can be remarkably improved.

The invention belongs to the field of electrochemical sensors, and relates to an electrochemical sensor for high-sensitivity detection of carbendazim and a preparation method of the electrochemical sensor. The surface of a glassy carbon electrode (GCE) is modified with an LDMS-CCN-GCT nanocomposite material prepared from dendritic large-aperture mesoporous silica, conductive carbon black nanoparticles and graphitized carbon nanotubes, and a CCN-GCT-LDMS / GCE working electrode is formed. The preparation method comprises the following steps: firstly, uniformly dispersing CCN and GCT in an N, N-dimethylformamide solution through magnetic stirring in an ultrasonic environment, wherein the CCN and the GCT are equal in mass; then, adding LDMS into the solution, and carrying out ultrasonic dispersion to obtain a uniformly mixed CCN (at) GCT (at) LDMS suspension; and finally, dispensing the uniform suspension onto the surface of GCE, and drying under an infrared lamp to prepare the working electrode CCN (at) GCT (at) LDMS / GCE modified by the CCN (at) GCT (at) LDMS nano composite material. Based on the synergistic effect generated by LDMS and CCN-coated GCT, the CCN-coated GCT-coated LDMS / GCE sensor is high in sensitivity, the detection limit can reach 7.36 nM, and the CCN-coated GCT-coated LDMS / GCE sensor has excellent carbendazim sensing detection performance.

The invention provides a preparation method of a nano high-performance iron runner castable, and belongs to the technical field of refractory materials. The preparation method comprises the following steps: preparing the following raw materials in parts by weight: 62-67 parts of brown fused alumina, 18-22 parts of silicon carbide, 4-7 parts of calcium-doped mesoporous zirconia, 2-5 parts of vermiculite, 6-8 parts of alpha alumina micro powder, 2-3 parts of titanium dioxide, 1-3 parts of coke powder, 0.1-0.3 part of aluminum powder, 1-3 parts of silicon powder, 1-2 parts of titanium powder, 1-3 parts of nano alumina, 2-3 parts of a binding agent and 0.3-0.5 part of a water reducing agent; and S2, putting the raw materials in the step S1 into a stirrer, stirring for 10-15 minutes, and uniformly mixing to obtain the nano high-performance iron runner castable. The apparent porosity of the castable in a high-temperature use environment of 1450 DEG C is reduced, and the high-temperature compression strength of the castable is improved.

The invention discloses a preparation method of bryophyte-based full-microporous carbon. The preparation method comprises the following steps: 1) simply chopping bryophyte and then naturally airing the bryophyte; 2) dipping the naturally aired bryophyte in a potassium hydroxide solution, then fishing out and naturally airing again; (3) firing the soaked and naturally aired bryophyte in a protective atmosphere to obtain primary charcoal; and 4) washing the primary charcoal with a hydrochloric acid solution and water until the primary charcoal is neutral to obtain activated carbon with the micropore content of 100%, namely the bryophyte-based full-micropore charcoal. According to the preparation method, the bryophyte with high water content serves as a carbon source, the carbon material with the micropore content being 100% is obtained through firing, the produced carbon has the advantages of being large in specific surface area, high in pore volume, high in nitrogen and oxygen doping level and the like, and when the carbon is applied to the capacitive energy storage material, high specific capacitance can be kept under the high-rate charging and discharging conditions. The method provided by the invention has the advantages of stable raw material supply, low raw material and production cost, simplicity in operation and easiness in large-scale production when being used for producing the carbon material.

The invention provides a vanadium phosphorus oxide catalyst. The vanadium phosphorus oxide catalyst comprises the following components in percentage by weight: 66-94% of vanadyl pyrophosphate, 0.5-6% of vanadyl phosphate, 0.8-25% of attapulgite and 1-6% of graphite. The preparation method comprises the following steps: mixing an organic solvent, vanadium pentoxide and phosphoric acid for reaction to obtain a blue pasty reaction solution containing a vanadium phosphorus oxide catalyst precursor, adding an attapulgite carrier into the blue pasty reaction solution, filtering, drying, forming, roasting, activating and the like to obtain the catalyst. The catalyst disclosed by the invention is applied to a reaction for preparing maleic anhydride by oxidizing n-butane, the reaction is carried out in a reaction temperature interval of 380-420 DEG C, and the conversion rate of the n-butane and the yield of the maleic anhydride are higher than those of the catalyst without the attapulgite.

The application discloses a mesoporous carbon preparation process with recyclable silicon source and mesoporous carbon with small pore size and large specific surface area. The mesoporous carbon preparation process comprises the following steps: preparing a silicon template: reacting a fluosilicic acid solution with calcium carbonate, and separating calcium fluoride precipitate and silica sol; the pH of the silica sol is 2-5; the concentration of silicon dioxide in the silica sol is 1-8 wt%; preparing a precursor: dissolving a carbon source and an organic acid in the silica sol, drying, grinding, and carbonizing in an inert atmosphere to obtain a C / Si precursor; the organic acid comprises at least one of oxalic acid, tannic acid, acetic acid and citric acid; removing the silicon template and recycling the silicon source: treating the C / Si precursor with hydrofluoric acid, and performing solid-liquid separation to obtain mesoporous carbon and a fluosilicic acid solution, wherein the fluosilicic acid solution is used for preparing the silicon template. The specific surface area of the mesoporous carbon is greater than 800 m 2 / g, and the pore size is less than 6 nm.

The invention provides a propylene polymerization sphere-like catalyst component, a solid titanium main catalyst and a preparation method and application of the solid titanium main catalyst, the solid titanium main catalyst comprises titanium halide, magnesium halide and peroxidated benzoate internal electron donors, and under the action of an alkyl aluminum cocatalyst and an organosilicon compound external electron donor, the solid titanium main catalyst is prepared into the sphere-like catalyst component. The catalyst is used for propylene polymerization or copolymerization, shows very high polymerization activity, very good hydrogen regulation sensitivity and stereospecificity, can be used for preparing a green and environment-friendly propylene polymer with high polymer isotacticity, good particle morphology and less fine powder, and can be used for producing a polypropylene product with a high melt index.

The invention provides a Ti-based catalyst and a preparation method and application thereof, and belongs to the technical field of atmospheric pollutant treatment catalysts. The preparation method comprises the following steps: loading an active component precursor onto a Ti-based carrier through an impregnation method, and then carrying out first ultrasonic treatment, first drying and high-temperature heat treatment; the active component precursor comprises transition metal salt and / or rare earth metal salt. The Ti-based catalyst is prepared by the preparation method and comprises a Ti-based carrier and an active component, the Ti-based carrier is a TiO2 nanotube, and the active component comprises transition metal and / or rare earth metal; the Ti-based catalyst is applied to catalytic oxidation of NVOCs, and the reaction temperature is 80-400 DEG C. The preparation method provided by the invention is simple to operate, low in cost and convenient for industrial popularization; the prepared catalyst is large in specific surface area, can effectively improve the selectivity of CO2 and N2 when applied to catalytic oxidation of NVOCs, and is low in reaction temperature and high in purification efficiency of NVOCs.

The invention relates to a nano cerium-zirconium oxide as well as a preparation method and application thereof, and belongs to the technical field of automobile exhaust purification. Water-soluble polyamide is used as an auxiliary adsorption material, so that the utilization rate of rare earth metal elements and the dispersity of the rare earth metal elements in a final product are improved, and the material cost is reduced and the highest oxide high-temperature thermal stability is improved. Meanwhile, adsorption points of rare earth metal elements in the PAM-rare earth metal complex play a role in heterogeneous nucleation, and crystal nucleus formation can be promoted; and the water-soluble PAM is beneficial to improving the content of substances around crystal nucleuses, accelerating the crystallization process and obtaining large-size crystals, and is beneficial to shortening the crystallization aging time. Hydrophilic groups and hydrophobic groups exist in water-soluble PAM molecules at the same time, so that the water surface tension can be reduced, the dispersity of hydroxide colloid in a precipitation flocculating constituent is improved, and the reduction of the specific surface area caused by agglomeration is reduced; meanwhile, a PAM molecular chain can slow down collapse of a crystal pore channel structure caused by water loss in the process of roasting hydroxide colloid into oxide at high temperature.

The invention relates to the technical field of catalysts, and discloses a macroporous silicon dioxide composite carrier and a preparation method and application thereof.The macroporous silicon dioxide composite carrier contains SiO2 and Al2O3, and the content of SiO2 is 65-90 wt% when the total weight of SiO2 and Al2O3 is 100 wt%; wherein the average pore size of the silicon dioxide composite carrier is 7.6-9.4 nm. The silicon dioxide composite carrier disclosed by the invention has relatively large pore diameter and pore volume, and the catalyst prepared by utilizing the silicon dioxide composite carrier disclosed by the invention has good catalytic performance and longer catalyst service life. The macroporous silicon dioxide composite carrier disclosed by the invention is simple in preparation process and low in price, and has extremely high industrial application and popularization values.

This invention discloses a USY molecular sieve, its preparation, and its application. The USY molecular sieve has the following properties: mesoporous pore volume accounts for 30%–60% of the total pore volume; the total acid content is 400–480 μmol / g at 200℃ and 120–150 μmol / g at 350℃. When the molecular sieve of this invention is used as a hydrocracking catalyst, both the catalyst activity and selectivity are significantly improved.

The invention provides a FeCe / SiO2 composite aerogel catalytic material as well as a preparation method and application thereof, and belongs to the technical field of flue gas denitration catalytic materials. According to the FeCe / SiO2 composite aerogel catalytic material, SiO2 aerogel is used as a carrier, and a transition metal oxide is loaded on the carrier; the transition metal oxide is an oxide of Fe and an oxide of Ce. The preparation method comprises the following steps: dissolving cerium salt and iron salt in water, then adding SiO2 aerogel, uniformly mixing, and carrying out microwave hydrothermal synthesis reaction on the obtained mixed solution to obtain a precursor material; and roasting the precursor material to obtain the FeCe / SiO2 composite aerogel catalytic material. The FeCe / SiO2 composite aerogel catalytic material provided by the invention has the characteristics of uniform pore size distribution, high specific surface area, large pore volume and strong adsorption capacity, and can efficiently catalyze NO and CO to be converted into N2 and CO2.

This invention provides a method for preparing and applying a catalyst for co-thermal pyrolysis of waste plastics and biomass, comprising the following steps: Step 1, mixing FCC waste catalyst, sodium carbonate, and a metal oxide precursor uniformly to form a powder; Step 2, modifying HZSM-5 molecular sieve with phosphorus; Step 3, mixing the mixture obtained in Step 1, the phosphorus-modified ZSM-5 molecular sieve from Step 2, a binder, and water to form microspheres, calcining to obtain the catalyst for co-thermal pyrolysis of waste plastics and biomass. The catalyst prepared by this invention has a large pore size and pore volume, and when used for co-thermal pyrolysis of waste plastics and biomass, the liquid yield is greater than 70%.

This application relates to the field of demulsifiers, and more specifically, to an oil sludge demulsifier, its preparation method, and its application. An oil sludge demulsifier comprises the following components in the following mass ratio: 20-35 parts of a surfactant complex, 7-12 parts of an alkyl sulfate sodium cosolvent, 0.6-1.8 parts of a stabilizer, and 48-55 parts of water; wherein the surfactant complex comprises hyperbranched polyamide amine and polyether amine modified magnetic nanoparticles. This oil sludge demulsifier improves upon the problems of existing demulsifiers, such as low dehydration capacity, slow dehydration speed, poor demulsification effect, and low oil content, thereby improving the demulsification performance and dehydration efficiency, and achieving effective separation of oil sludge.

The invention discloses a silicon-aluminum material and a preparation method thereof. After being roasted at 500-700 DEG C, the silicon-aluminum material has the following properties: the content of silicon dioxide is 20-75wt%, and the pore volume is 0.70-1.5 mL / g; and the specific surface area is 280-400 m < 2 > / g. The preparation method of the silicon-aluminum material comprises the following steps: (1) uniformly mixing a silicon-containing compound A, an auxiliary agent A, an aluminum-containing compound and water to obtain a material flow A; (2) carrying out heat treatment on the material flow A in the presence of organic amine to obtain a material flow B; (3) uniformly mixing a silicon-containing compound B, an acidic aluminum-containing compound, an alkaline aluminum-containing compound and water, and treating to obtain a material flow C; (4) mixing the material flow C with an auxiliary agent B to obtain a material flow D; and (5) mixing the material flow B and the material flow D, carrying out hydrothermal treatment, and then washing, drying and roasting to obtain the silicon-aluminum material. The provided silicon-aluminum material shows certain molecular sieve characteristics, has the characteristics of high B acid content and stepped pore channel distribution, and is especially suitable for being used as a carrier of a hydrogenation catalyst.

This application relates to a silicon-modified macroporous pseudoboehmite and its preparation method, belonging to the technical field of pseudoboehmite preparation. The method includes: mixing an aluminum salt solution and a sodium aluminate solution in parallel flow and performing a low-temperature neutralization reaction; adding a low-concentration water glass 5-8 minutes after the start of the reaction, ensuring the water glass addition ends before the neutralization reaction ends, to obtain an amorphous precursor; separating the amorphous precursor into a liquid and solid state to obtain a filter cake; mixing the filter cake with deionized hydrated slurry to obtain a slurry; adding sodium carbonate to the slurry to adjust the pH to 8-9 to obtain an alkaline slurry; subjecting the alkaline slurry to an aging and crystallization reaction at high temperature to obtain a pseudoboehmite slurry; filtering and washing the pseudoboehmite slurry to obtain a silicon-modified macroporous pseudoboehmite filter cake, and then drying it to obtain silicon-modified macroporous pseudoboehmite.

The invention discloses a silicon oxide microsphere as well as a preparation method and application thereof. The silicon oxide microspheres are large-aperture silicon oxide microspheres, the specific surface area is 395-750m < 2 > / g, the pore volume is 1.0-3.5 ml / g, and the average aperture is 17-50nm. The silicon oxide microspheres have the characteristics of large specific surface area, large pore volume and large pore diameter, and the catalyst prepared by using the silicon oxide microspheres as the carrier has the advantage that the activity is remarkably improved when the catalyst is applied to olefin polymerization reaction.

The invention provides pseudo-boehmite with high specific surface area and large pore volume, a preparation method thereof and a hydrogenation catalyst.The preparation method comprises the steps that an excessive NaOH solution and associated aluminum ore are mixed and boiled, aluminum hydroxide is leached out, and a sodium metaaluminate solution containing impurities is obtained; mixing the sodium metaaluminate solution containing the impurities with a precipitant to precipitate the impurities so as to obtain a sodium metaaluminate purified solution; mixing sulfuric acid and the sodium metaaluminate purified liquid, and reacting to obtain turbid liquid containing pseudo-boehmite; mixing the turbid liquid containing the pseudo-boehmite with hydroxyl carboxylate to enable the pseudo-boehmite to be electronegative, so as to obtain an electronegative pseudo-boehmite turbid liquid; and mixing the electropositive aluminum ions and the electronegative pseudo-boehmite suspension to obtain the pseudo-boehmite with high specific surface area and large pore volume. The low-cost hydrogenation catalyst prepared from the pseudo-boehmite with high specific surface area and large pore volume has the characteristics of high specific surface area and large pore volume, has higher catalytic activity, contains more impurities, and has stronger market competitiveness.

The invention relates to the field of water treatment materials, and particularly discloses a porous carbon-carbon composite adsorption material prepared on the basis of semi-coke wastewater recovered fractionated phenol extract and gasified slag as well as a preparation method and application of the porous carbon-carbon composite adsorption material. The preparation method comprises the following steps: taking pretreated gasified slag prepared by pickling and modifying the gasified slag as a reinforcement matrix; the method comprises the following steps: mixing a fractionated phenol purified product recovered from semi-coke wastewater with an organic binder, phosphoric acid and a solvent to prepare a precursor solution; the invention discloses a preparation method of a porous carbon-carbon composite adsorption material, and the porous carbon-carbon composite adsorption material prepared by the method and application of the porous carbon-carbon composite adsorption material in the field of water treatment are prepared by soaking a reinforcement matrix in a precursor solution and heating and carbonizing. According to the invention, two industrial wastes, namely the gasified slag and the semi-coke wastewater recycled material, are used as main materials and are subjected to pore forming in a high-temperature carbonization process at the same time, so that the prepared adsorption material has excellent decoloration and COD removal performance, and meanwhile, high-value resource reutilization of the wastes is realized.

The application belongs to the technical field of lithium batteries, and relates to a preparation method of a double-coated silicon-carbon composite material, an electrode and a lithium battery.The method comprises the following steps: placing a lithium dopant and a MOF material in a first organic solvent, adding a template agent and a catalyst, reacting, filtering, freeze-drying and obtaining a gel composite; in an inert atmosphere, the gel composite is heated to a first preset temperature, carbon dioxide is introduced at a preset flow rate, the temperature is lowered, the gel composite is soaked in mixed acid, pickling is performed, vacuum drying is performed, and a porous carbon composite material is obtained; liquid silane, a phosphine derivative, a dispersing agent, the porous carbon composite material and a silane coupling agent are added to a second organic solvent, spray drying is performed, primary carbonization is performed, and a silicon-carbon precursor material is obtained; resin is dissolved in a third organic solvent, a fast ion conductor and the silicon-carbon precursor material are added, secondary carbonization is performed, the temperature is lowered to a second preset temperature, a reducing gas is introduced, and a double-coated silicon-carbon composite material is obtained; the conductivity is improved, the interface stability is improved, and the full charge swelling is reduced.

The invention provides a CuCe / SiO2 composite aerogel catalytic material as well as a preparation method and application thereof, and belongs to the technical field of flue gas denitration catalytic materials. According to the CuCe / SiO2 composite aerogel catalytic material, SiO2 aerogel is used as a carrier, and a transition metal oxide is loaded on the carrier; the transition metal oxide is an oxide of Cu and an oxide of Ce. The preparation method comprises the following steps: dissolving cerium salt and copper salt in water, then adding SiO2 aerogel, uniformly mixing, and carrying out microwave hydrothermal synthesis reaction on the obtained mixed solution to obtain a precursor material; and roasting the precursor material, so as to obtain the CuCe / SiO2 composite aerogel catalytic material. The CuCe / SiO2 composite aerogel catalytic material provided by the invention has the characteristics of uniform pore size distribution, high specific surface area, large pore volume and strong adsorption capacity, and can efficiently catalyze NO and CO to be converted into N2 and CO2.

The invention relates to the technical field of catalytic cracking aids, and particularly discloses a high-strength and large-pore-volume catalytic cracking aid and a preparation method thereof. The invention relates to a high-strength large-pore-volume catalytic cracking auxiliary agent, which is prepared by the following steps: by taking N1, N5-didecyl-N1, N1, N5, N5-tetramethylpentane-1, 5-diammonium bromide and choline chloride as a mixed template agent, adding a pretreatment solution of ZSM-5 molecular sieve seed crystal, adding ferric nitrate to introduce an iron source, crystallizing for a certain time by a hydrothermal method to obtain a ZSM-5 molecular sieve, and then carrying out ion exchange on the ZSM-5 molecular sieve and ammonium chloride to obtain the high-strength large-pore-volume catalytic cracking auxiliary agent. Finally, the HZSM-5 molecular sieve, kaolin, pseudo-boehmite and alumina sol are jointly used for preparing the high-strength and large-pore-volume catalytic cracking aid. The cracking aid prepared by the invention has the advantages of high strength, large pore volume and high acid content, and is favorable for better improving the conversion rate of raw oil and the yield of propylene in propylene production.

The invention relates to a preparation process of a mildew-proof antibacterial self-cleaning coating. The preparation method comprises the following steps: preparation of a waterborne polyurethane emulsion, synthesis of waterborne polyurethane (WPU-TNO) of TNO, preparation of an antibacterial mildew-proof fatting agent through esterification reaction, preparation of dendritic mesoporous silica, modification of the dendritic mesoporous silica by APTES, preparation of a silica-loaded nano-silver antibacterial agent, and preparation of nano TiO2 self-cleaning hydrosol. According to preparation of the silicon dioxide loaded nano-silver / TiO2 self-cleaning / WPU-TNO antibacterial coating, an emulsification method and a lipidation method are creatively combined, the prepared material shows a good self-cleaning function and excellent antibacterial and mildew-proof performance, and the silicon dioxide loaded nano-silver / TiO2 self-cleaning / WPU-TNO antibacterial coating has the advantages of being stable, environmentally friendly, biosafe, excellent in self-cleaning function, mildew-proof, antibacterial and the like.

This invention discloses a method for preparing a sulfur-based hydrodemetallization catalyst. The method includes: first, mixing and heating ammonium dithiocarbamate, nickel salt and / or cobalt salt, citric acid, ethylene glycol, and deionized water; then adding ammonium tetrathiomolybdate and / or ammonium tetrathiotungstate; and mixing the resulting sulfur-containing composite active metal precursor impregnation solution with boehmite powder, boehmite filter cake, zinc phosphate, ammonium borate, starch, alumina sol, silica sol, magnesium carbonate, a pore-forming agent, and a microwave sensitizer at 50℃~90℃. After ultrasonic dispersion, slurrying, kneading, and extrusion molding, the mixture is microwave-dried under nitrogen protection at radiation frequencies of 840MHz and 2450MHz to obtain the sulfur-based hydrodemetallization catalyst. The sulfur-based hydrodemetallization catalyst prepared by this invention combines the functions of a conventional protective agent with excellent hydrodemetallization activity, and can be widely used in oil hydrotreating, especially in the hydrotreating process of inferior oils with high sulfur, high nitrogen, and high metal content.

This invention discloses a method for preparing silica microspheres, the prepared silica microspheres, and their applications. The method for preparing silica microspheres includes: (1) heating a mixture of n-alkane and pitch under reflux to separate a solid product; (2) mixing the solid product from step (1) with a mixture of aromatics I, a first silicon source, a polyoxyethylene-polyoxypropylene-polyoxyethylene copolymer, and water to obtain a crystallization solution, followed by hydrothermal crystallization and calcination to obtain an intermediate product; (3) mixing the intermediate product from step (2), a second silicon source, a pore-forming agent, and water to obtain a slurry; then, spray-drying and calcining the slurry to obtain the silica microspheres. The silica microspheres prepared by this method have the advantages of large specific surface area, large pore volume, and large average pore size, which significantly improves polymerization activity in olefin polymerization reactions.

The invention provides a preparation method and application of a catalyst for thermal cracking of waste plastics, and the preparation method comprises the following steps: step 1, uniformly mixing an FCC waste catalyst, sodium carbonate and a metal oxide precursor to form powder; step 2, mixing and pulping the mixture obtained in the step 1, a binder and water to form microspheres; and step 3, acidizing, drying and roasting the microspheres to obtain the catalyst for waste plastic thermal cracking. The catalyst prepared by the method disclosed by the invention is relatively large in pore diameter and pore volume, is used for thermal cracking of waste plastics, and has relatively high liquid yield.

The present invention provides a method for preparing a hierarchical pore structure silicon dioxide film using an eggshell inner membrane as a template, wherein the eggshell inner membrane is used as a hard template, and the fibers constituting the eggshell inner membrane are burned to form macropores; a surfactant is used as a soft template, and mesopores are formed by burning to finally obtain a film with a macroporous-mesoporous hierarchical structure. The film obtained by the present invention has macropores and mesoporous structures, has a large specific surface area and pore volume, is not only suitable for preparing separation and purification films, but also can be conveniently further compounded with functional materials to prepare composite functional materials. At the same time, this method has the characteristics of low cost and has a guiding role in the synthesis of other mesoporous film materials.