26results about How to "Large hole volume" patented technology

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 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.

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.

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 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.

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.

This invention relates to the field of hydrocracking catalysts, and discloses a hydrocracking catalyst, its preparation method and application, and a method for hydrocracking treatment of residue oil. The hydrocracking catalyst contains molecular sieves, silicon-modified alumina, and active metal components. Optionally, the hydrocracking catalyst also contains alumina and / or additives. The content of the molecular sieve is 5-25 wt%, the content of the silicon-modified alumina is 30-60 wt%, and the content of the alumina is 0-20 wt%. The content of the active metal components, calculated as oxides, is 5-35 wt%, and the content of the additives, calculated as oxides, is 0-1.0 wt%. The catalyst provided by this invention has the advantages of large specific surface area, large pore volume, large pore size, and high metal content. When used in the hydrocracking treatment of residue oil, it not only exhibits high activity and good stability, but also improves naphtha selectivity, expands feedstock adaptability, and reduces hydrogen consumption.

The application provides a bimetallic ZIF-8 adsorbent, a preparation method and application thereof, and the preparation method of the bimetallic ZIF-8 adsorbent is that a zinc metal precursor, a cobalt metal precursor and 2-methyl imidazole are fully ball-milled and uniformly mixed in a molar ratio of 1:(0.1-0.9):(2-10), then the uniformly mixed material is put into a reaction kettle, and is reacted at 120-200 DEG C, and then the product after reaction is calcined under air isolation conditions, so that the bimetallic ZIF-8 product is obtained. The preparation method of the bimetallic ZIF-8 adsorbent is simple in process, free of pollution and friendly to the environment. The bimetallic ZIF-8 adsorbent has a large specific surface area and pore volume, is used for separating single branched-chain and double branched-chain (multi branched-chain) alkanes from a C6-C10 isomeric alkane mixture, has a large adsorption amount of single branched-chain alkanes, and can efficiently separate single branched-chain / double branched-chain (multi branched-chain) alkanes.

The invention relates to a method for adsorbing tetracycline in a water body by using magnetic biochar loaded graphite phase carbon nitride, which comprises the following steps: by taking agricultural waste corn straw as a precursor, loading magnetic iron and graphite phase carbon nitride through hydrothermal reaction, and calcining to prepare a FeBC / g-C3N4 (short for FeBC / g-CN) biochar composite material, so as to efficiently adsorb tetracycline pollutants in the water body; and the adsorption rate to 25 mg / L of tetracycline within 10 minutes reaches 91.4%. The material synthesis method is simple, the stability is good, tetracycline pollutants cannot be dissociated and released under long-time adsorption, the problems that a traditional biochar technology is low in adsorption efficiency, pollutants are prone to dissociation and the like are solved, and the material has good application prospects in the field of antibiotic pollutant treatment.

The present application relates to a kind of composite metal catalyst and its preparation method and application in ozone catalytic oxidation, and the preparation method is specifically, cocoa pod shell and amaranth are cleaned, dried and crushed to obtain mixed plant powder, then treated by soaking with acid solution, and then washed to neutral and dried to obtain pretreated mixed plant powder;Tetrabutyl titanate, anhydrous ethanol, deionized water and concentrated nitric acid are mixed in proportion, ceramic sol is obtained by hydrolysis at room temperature;The pretreated plant powder is treated by negative pressure impregnation with ceramic sol, and then aged by standing, dried, calcined and cooled to obtain a composite biomass charcoal carrier with hierarchical porous structure;It is immersed in manganese salt solution and chromium salt solution, and a composite metal catalyst is obtained after calcination treatment.The composite metal catalyst of the present application has hierarchical porous structure, high mechanical stability and double-metal synergistic catalytic effect, which significantly improves the degradation efficiency of volatile organic pollutants and the long-term operation stability of ozone catalytic oxidation system.

The application discloses a method for removing organic pollutants by using a phosphorus-doped carbon-coated MSi cobalt-loaded catalyst, and comprises the following steps: step one, preparation of MSi; step two, preparation of carbon-coated MSi; step three, preparation of the phosphorus-doped carbon-coated MSi cobalt-loaded catalyst; and step four, removal of organic pollutants by using the phosphorus-doped carbon-coated MSi cobalt-loaded catalyst and peroxymonosulfate system. The application realizes high activity and long-period stability of the catalyst by utilizing the regular adjustable pore channel and chemical inertness of MSi, combining the electronic regulation and stabilization of cobalt active sites by the carbon coating layer and phosphorus doping. The method has mild reaction conditions, and the material is green and environmentally friendly, so that the removal of various organic pollutants can be realized economically and quickly. Under the optimal conditions, the phosphorus-doped carbon-coated MSi cobalt-loaded catalyst can activate PMS, and more than 90% of the organic pollutants in wastewater can be effectively removed in a short time; the method has simple steps, the raw materials are easy to obtain, does not pollute the environment, and is suitable for the field of wastewater treatment.

The invention discloses macroporous alumina and a preparation method and application thereof, the preparation method comprises the following steps: S1, mixing isobutylene-maleic anhydride copolymer powder with ammonia water for ammonolysis reaction to obtain a solution; s2, mixing the solution in the step S1, hydrated alumina powder, kaolin powder and cellulose to obtain a mixture; and S3, mixing the mixture in the step S3 with an acidic solution and water, molding, drying and roasting to obtain the macroporous alumina. The preparation method provided by the invention has the advantages of simple preparation process, environment-friendly preparation process and low cost. The macroporous residual oil hydrogenation protective agent carrier formed by the invention is large in pore volume, contains a large-proportion, continuous and smooth pore structure which is larger than 500nm, is uniform in distribution, is very beneficial to diffusion of macromolecular heterocyclic compounds in residual oil into the protective agent, and is very beneficial to containing a large number of metal impurities.

The application discloses a methanol steam hydrogen production catalyst and a preparation method and application thereof, and belongs to the hydrogen production technical field. The preparation method of the methanol steam hydrogen production catalyst comprises the following steps: (1) dissolving aluminum salt, copper salt and zinc salt in deionized water to obtain a mixed salt solution; stirring and uniformly mixing anhydrous ethanol solution of a surfactant, adjusting the pH value to 6.5-7.5 by using lye, standing and aging at room temperature, and obtaining a precursor through filtering, washing and drying; and (2) placing the precursor into a tube furnace to perform calcination, and obtaining the methanol steam hydrogen production catalyst. The methanol steam hydrogen production catalyst prepared by the application has a relatively high specific surface area, a relatively large pore size and a pore volume, and has a relatively high conversion rate, a relatively high stability and a relatively low CO selectivity when being used for catalyzing hydrogen production from methanol steam.

The application discloses a preparation method of PST-2 molecular sieve, and particularly relates to the following steps: (1) uniformly mixing a mixture of a silicon source, an aluminum source, a mineralizer A, an organic template agent and water to obtain a molecular sieve mother liquor, performing primary crystallization under certain temperature conditions, and cooling to room temperature; (2) performing secondary crystallization on the material in step (1), and obtaining the PST-2 molecular sieve after filtering, washing, drying and calcining the solid product. The PST-2 molecular sieve preparation method is simple and easy to operate, and has high molecular sieve yield; the PST-2 molecular sieve prepared by the method has large specific surface area, large pore volume and high silicon-aluminum ratio, and has a bright application prospect in the field of petroleum refining.

This application belongs to the field of battery technology, and particularly relates to silicon-carbon composite materials and their preparation methods, electrodes, and batteries. The method includes: mixing asphalt with potassium hydroxide and dopants uniformly, heating to a first preset temperature, passing a crosslinking agent mixed gas at a first preset flow rate for first activation, cooling to obtain asphalt-based porous carbon; adding the asphalt-based porous carbon to an aldehyde compound solution, then adding a phenolic compound and a catalyst and mixing uniformly, performing a hydrothermal reaction, filtering, and performing a second activation to obtain a hard carbon-coated soft carbon porous carbon composite material; immersing the porous carbon composite material in a liquid silane solution and reacting under closed negative pressure to obtain an intermediate material; heating the asphalt to a molten state, then adding the intermediate material and an organoniobium compound and stirring uniformly to perform carbonization to obtain a silicon-carbon composite material; possessing low expansion, high pore volume, low impedance, and high compaction density, thus improving the electrochemical performance of the battery.

The invention discloses a ZSM-5 molecular sieve as well as preparation and application thereof. The preparation method of the ZSM-5 molecular sieve comprises the following steps: (a) mixing a silicon source I, an aluminum source I, water and a template agent I, and carrying out first sealing treatment to obtain a mixture A; (b) mixing the mixture A with an organic matter I, and carrying out secondary sealing treatment to obtain a mixture B; (c) mixing the mixture B, a silicon source II, an aluminum source II, water, a template agent II and an organic matter II to obtain a mixture C; and (d) crystallizing the mixture C, and carrying out liquid-solid separation, washing and drying to obtain the molecular sieve, the conditions of the first airtight treatment are as follows: the temperature is 10-40 DEG C, and the time is 5-15 hours; the conditions of the second airtight treatment are as follows: the temperature is 80-130 DEG C, and the time is 1-5 hours. A catalyst prepared from the ZSM-5 molecular sieve is used for a reaction for preparing ethylbenzene through alkylation of benzene and ethylene, and the service life of the catalyst is obviously prolonged.

This invention provides a method for preparing a metal-organic framework adsorbent, belonging to the field of adsorbent technology. The invention includes the following steps: dissolving a metal ion salt and an organic ligand in an organic solvent, controlling the reaction temperature and time, centrifuging, washing, and vacuum drying to obtain the metal-organic framework adsorbent; the organic ligand contains one or two of amino, carbonyl, carboxyl, sulfonic acid, and hydroxyl groups; the adsorbent selectively adsorbs glucagon-like peptide-1 analogs. This invention synthesizes a metal-organic framework adsorbent by combining a metal ion salt with an organic ligand containing groups such as amino, carbonyl, carboxyl, sulfonic acid, and hydroxyl groups. It utilizes the charged portion or specific groups in the organic ligand to form hydrogen bonds, ionic bonds, van der Waals forces, and chelation with glucagon-like peptide-1 analog molecules, achieving highly efficient and selective adsorption of glucagon-like peptide-1 analogs, exhibiting high adsorption capacity, fast adsorption rate, and good adsorption stability.

This invention relates to a nickel metal embedded porous carbon adsorbent, its preparation method, and its application, comprising the following steps: S1, adding a nickel salt solution dropwise to nano-silica, drying it, and then adding biomass for grinding; S2, pre-carbonizing the product after grinding in step S1 at a low temperature; S3, carbonizing the product after pre-carbonization in step S2 at a high temperature under inert gas protection; S4, adding an alkaline solution to the product after high-temperature carbonization in step S3 to remove the nano-silica, thereby obtaining the nickel metal embedded porous carbon adsorbent. Compared with the prior art, this invention has a unique embedded structure, which improves the stability of the metal sites, and has a large specific surface area and pore volume, thereby improving the selective adsorption capacity for Xe and effectively separating Kr and Xe.

The invention discloses a mixed fertilizer for improving soil activity and a preparation method. The mixed fertilizer is prepared from the following raw materials in parts by weight: 20-50 parts of modified zeolite, 1-5 parts of a polyurethane synergist, 0.5-1.0 part of a cross-linking agent, 10-20 parts of a composite leavening agent, 5-10 parts of a surfactant, 20-30 parts of carbon nanotube powder, 50-80 parts of a nitrogen-phosphorus-potassium fertilizer, 15-30 parts of a biological organic fertilizer, 30-50 parts of amino acid powder, 25-35 parts of humic acid, 5-15 parts of urea and a proper amount of compound bacteria. S1, preparing a zeolite-based carrier; s2, preparing a fertilizer base material; and S3, mixing. Compared with the prior art, the method has the advantages that the surface and internal activity of the zeolite can be improved; the effect of promoting the formation of a soil aggregate structure is very good; the metabolism of microorganisms is facilitated, and the growth and reproduction of the microorganisms are facilitated, so that the development of crop root systems is promoted.