73results about How to "High reactivity" patented technology

This invention relates to the field of thermal insulation materials, specifically to an inorganic silicon crystal fire-resistant thermal insulation material for fireproof air ducts and its preparation method. The material comprises inorganic silicon crystal powder, hollow microspheres, composite binders, reinforcing fibers, surface modifiers, nano-antibacterial agents, crack-resistant agents, flame-retardant synergists, and intumescent flame-retardant microcapsules. The inorganic silicon crystal powder is activated by calcination, the microspheres are pretreated with coupling agents and coated with silica sol, the binder is a compound type, the fibers are grafted, the antibacterial agent is loaded onto a carrier, and the flame-retardant microcapsules have a specific core and shell. All components work synergistically to ensure performance. This invention improves the material's fire resistance, thermal insulation, and mechanical properties, integrates antibacterial and flame-retardant functions, optimizes the process to ensure stable performance, reduces fire risk, and meets the high-performance and high-stability requirements of high-end building fireproof air ducts.

This invention discloses a method for synthesizing cefotiam, using 7-aminocephalosporanic acid (7-ACA) as the parent nucleus and introducing a 4-dimethylaminopyridine-dimethyl carbonate composite catalytic system. The reaction is carried out in a one-pot process involving 3-position nucleophilic substitution, 7-position amidation, and simultaneous deprotection in a green mixed solvent of ionic liquid [BMIM]BF₄-water with 1-(2-dimethylaminoethyl)-1H-5-mercapto-tetrazole and compound I. This method simplifies the process, improves selectivity, produces a high-purity product with stable yield, and is suitable for industrial production.

The utility model discloses environment-friendly low-alkali cement grinding aid stirring equipment which comprises a stirring machine shell, an inner cavity is fixedly connected in the stirring machine shell, the top end of the inner cavity is in threaded connection with a first rotating shaft, a plurality of push type paddles are fixedly connected to the first rotating shaft in the vertical direction, and the first rotating shaft is in threaded connection with a second rotating shaft in the vertical direction. The top surface of the stirrer shell is fixedly connected with a motor I, and the output end of the motor I is fixedly connected with the rotating shaft I; a second rotating shaft is in threaded connection with the top end of the stirrer shell, a plurality of turbo type paddles are fixedly connected to the second rotating shaft in the vertical direction, a second motor is fixedly connected to the top face of the stirrer shell, and the output end of the second motor is fixedly connected with the second rotating shaft; liquid components are mixed with low shear force in the pre-stirring stage of the push-type paddle, the scrapers synchronously remove attachments on the wall of the cavity, and the turbo-type paddle rapidly crushes solid particles through high shear force and promotes uniform fusion of materials, so that the reaction activity of the grinding aid and the stability of a finished product are remarkably improved.

This invention discloses a long-life pavement material for extreme and complex conditions and its preparation method. Modified asphalt pavement material is prepared using ultra-deeply decrosslinked rubber as the main raw material (with a content greater than 50%). Through specific processes and formulations, this pavement material retains excellent self-healing properties even under extreme low-temperature conditions (< -10 °C), with a healing efficiency greater than 50%, and a healing efficiency greater than 30% after aging, resulting in a long service life. This invention not only solves the problem of easy cracking in asphalt pavements and significantly improves their service life, but also enables the high-value resource utilization of waste rubber, resulting in significant environmental and economic benefits.

A plastic masterbatch is characterized by comprising the following components: linear low-density polyethylene, fluorocarbon-modified talc, polypyrrole-modified talc, a foaming agent, and a dispersant. The invention also discloses a method for preparing the plastic masterbatch. The addition of modified talc significantly improves the conductivity and wear resistance of the plastic masterbatch.

This invention discloses an organocobalt salt for improving the tensile strength of rubber and its preparation method, belonging to the field of rubber technology. The organocobalt salt for improving the tensile strength of rubber comprises, by mass parts, 140-210 parts of organosilicon vegetable fatty acid, 20-30 parts of solvent, 20-30 parts of cobalt hydroxide, and 10-16 parts of propionic acid. The organosilicon vegetable fatty acid is obtained by reacting rosin with organosilicon maleimide. The organosilicon maleimide is obtained by reacting maleic anhydride with a silicon-containing long-chain fatty amine. The silicon-containing long-chain fatty amine is obtained by reacting methyldiethoxysilane with an unsaturated long-chain fatty amine. The organocobalt salt obtained by this invention has a good effect on promoting the adhesion between metal and rubber while effectively improving the tensile strength of rubber.

The application belongs to the technical field of polyurethane grouting materials, and discloses a high polymer grouting material capable of being rapidly cured in a low-temperature environment, which is formed by mixing A component and B component, and the content of each component is as follows in terms of weight fraction: A component: 100 parts of polymethylene polyphenyl polyisocyanate; B component: 35 parts of polyether polyol A, 15 parts of polyester polyol B, 5-15 parts of Mannich base, 10 parts of flame retardant, 1.5 parts of foaming catalyst, 0.5 parts of gel catalyst, 0.5 parts of surfactant, 5 parts of physical foaming agent, 1.0 parts of chemical foaming agent and 5 parts of plasticizer. The Mannich base curing agent is added to the B component during preparation of the two-component polyurethane grouting material, and is uniformly mixed with other materials, so that the high polymer grouting material can be rapidly cured in a low-temperature environment.

This invention pertains to compositions of polymeric compounds, specifically a recycled rubber powder modified asphalt based on a renewable composite activator, its preparation method, and its application. The recycled rubber powder modified asphalt comprises a base asphalt and activated rubber powder in a mass ratio of 1:(0.2~0.3). The activated rubber powder comprises waste tire rubber powder and a composite activator in a mass ratio of 10:(0.8~1.5). The composite activator comprises an organic phase and an inorganic phase in a mass ratio of (1.5~3):1. The organic phase is a chitosan-amino acid derivative, and the inorganic phase is a layered bimetallic hydroxide. Compared with existing technologies, the rubber powder modified asphalt prepared by this invention exhibits good high-temperature storage stability and interfacial structural integrity, demonstrating excellent anti-aging properties and high-temperature rutting resistance during long-term service.

The application provides a method for preparing methyl silicone oil by using organic silicon high ring, which directly prepares the methyl silicone oil by using cheap organic silicon high ring, and reduces the production period and cost of the methyl silicone oil. In the application, semi-continuous feeding is adopted, the viscosity of the processed methyl silicone oil is controllable, the molecular weight distribution is narrow, the product conversion rate is greater than 85%, compared with the traditional process, the reaction process is stable, the utilization rate of the end-capping agent is high, and the amount is less.

This invention discloses a method for preparing an electrically pulsed perovskite oxygen evolution reaction (OER) catalyst. The method involves overlapping electrodes on both sides of an SRIO thin film prepared from strontium nitrate, ruthenium oxide, and iridium oxide. Under an argon atmosphere, the SRIO thin film is subjected to a 2-second electrical pulse treatment via an external voltage source, with an electric field strength of 40 V / cm. This invention utilizes ruthenium oxide and iridium oxide powders as ruthenium and iridium sources, making it easier to obtain high-purity SRIO@E catalysts. This provides significant guidance for the synthesis of noble metal-based perovskite materials. Through a simple and easy-to-implement electrical pulse treatment strategy, this invention can remove some oxygen atoms from the catalyst, increasing the number of unpaired electrons available for the catalytic reaction and improving reaction activity. Furthermore, this electrical pulse treatment strategy is simple and controllable, has universal applicability, and is expected to meet the needs of industrial production.

The application provides a copper selection process of iron-containing waste residue, and comprises the following steps: adding iron powder and ammonium fluoride into titanium dioxide waste acid to obtain a titanium dioxide waste acid pre-solution after a period of reaction; S2, adding the iron-containing waste residue into the titanium dioxide waste acid pre-solution, and controlling the reaction temperature to be 20-50 DEG C; S3, after the reaction is completed, adding a nano precipitant when the pH of the solution is adjusted to 3-4.5, and adding a modified flocculating agent after a period of reaction, so that the precipitated copper is obtained after filtration and washing.

This application relates to the technical field of waste gas treatment equipment, and discloses a boiler flue gas desulfurization and denitrification treatment device, including a desulfurization and denitrification cylinder. A filter box is fixedly installed on the left side of the desulfurization and denitrification cylinder, a mixing box is fixedly installed on the top of the desulfurization and denitrification cylinder, and a filtrate box is fixedly installed at the bottom of the desulfurization and denitrification cylinder. The same functional box is fixedly installed on the right side of the filtrate box, the right side of the desulfurization and denitrification cylinder, and the right side of the mixing box. The same conveying chamber is fixedly installed on the top of the functional box and the top of the mixing box. A chemical storage tank is fixedly installed on the top of the conveying chamber. An air inlet pipe is provided on the left side of the filter box, an activated carbon adsorption plate is provided inside the filter box, and a spraying mechanism is provided inside the desulfurization and denitrification cylinder. This application has the following advantages and effects: by setting up a conveying mechanism and a stirring mechanism, it can ensure the uniformity of the reagent concentration and improve the reaction activity, and can achieve the uniform addition of the reagent and improve the mixing efficiency.

The application belongs to the technical field of bio-based packaging materials, and particularly relates to a novel double-layer composite film and application thereof. The novel double-layer composite film comprises the following steps: reacting palmitic anhydride and carboxymethyl cellulose to obtain carboxymethyl cellulose palmitate; adding a pH-sensitive natural dye indicator to obtain carboxymethyl cellulose palmitate nanoemulsion containing a pH-sensitive substance; then loading a natural polymer material to prepare a film material; finally adding the film material to the carboxymethyl cellulose palmitate to prepare a composite film, thereby obtaining the novel double-layer composite film. The double-layer composite film can be self-emulsified without adding a surfactant, and has the ability to load functional indicator (pH-sensitive color indicator) substances; meanwhile, the barrier performance of the film material, such as a chitosan film, to water vapor and oxygen is improved, and the double-layer composite film has a very promising application in food or fruit preservation. The method provided by the application is not only green in raw materials, but also uses a flow casting method, which can be applied to industrial production and has a good application prospect.

The application relates to the field of polyurethane foaming materials, and discloses a low-VOC polyurethane foaming compound and a preparation method thereof; the low-VOC polyurethane foaming compound comprises A component and B component which are mutually packed, the A component comprises low-aldehyde polyether polyol, polyether carbonate polyol, functionalized polyurethane oligomeric polyol, reactive tertiary amine catalyst, foam stabilizer and water, and the B component comprises a low-free-monomer isocyanate component; the functionalized polyurethane oligomeric polyol is prepared by reacting polyether carbonate polyol, diisocyanate and a hydroxyl compound containing a 1,3-dicarbonyl structure and having two or more hydroxyl groups. The preparation method comprises the steps of functionalized polyurethane oligomeric polyol preparation, A component dispensing, B component dispensing and packing. By introducing the reactive oligomeric polyol with the 1,3-dicarbonyl structure into the foaming system, the volatile components brought by raw materials can be reduced, and the continuous control ability of aldehyde components in the foaming process and the post-maturation process can be improved.

The present application relates to a kind of biological gamma-butyrolactone and its production method, the production method of biological gamma-butyrolactone of the present application includes the following steps: preparation biological succinic acid solution;The obtained biological succinic acid solution and hydrogen continuously enter the fixed bed containing nickel copper catalyst and carry out hydrogenation reaction, obtain crude product;The obtained crude product enters separation column and is separated and purified, obtain biological gamma-butyrolactone;Nickel loading in the nickel copper catalyst is 30wt%~60wt%, copper loading is 1wt%~5wt%, the content of hydrophobic compound is 0.01wt%~0.2wt%.The present application is prepared by 5wt%~30wt% biological 1,4-butanedioic acid dilute solution continuously into fixed bed hydrogenation reactor, and biological gamma-butyrolactone liquid is prepared, continuously enters rectification separation column and is separated, and biological gamma-butyrolactone product with purity ≥99.99% can be prepared, and the rest is impurity;The impurity includes tetrahydrofuran and 1,4-butanediol;The content of tetrahydrofuran is ≤0.004%;The content of 1,4-butanediol is ≤0.005%.

This invention discloses a method for preparing high-entropy ceramic matrix composites using a reactive infiltration process, belonging to the technical field of ceramic matrix composites. The steps are as follows: at least four single-component carbides are ball-milled and mixed with a carbon source, then dispersed in a dispersion liquid to obtain a slurry; continuous fibers are woven into a preform, and an interface layer and a matrix layer are deposited to obtain a semi-dense composite material; the slurry is introduced through vacuum or pressure impregnation; and a high-entropy carbide matrix is ​​generated in situ and densified by reactive infiltration after embedding with a transition metal and its alloy. This invention solves the problems of long process cycles, high porosity, high cost, and insufficient introduction of high-entropy ceramics in existing processes, achieving rapid densification and improving the material's high-temperature stability, oxidation resistance, and ablation resistance. It is suitable for the large-scale production of thermal protection materials for hypersonic vehicles.

This invention discloses a phosphonothiolated binaphthol derivative and its synthetic method. Using readily available binaphthioonium salts as starting materials, secondary phosphine oxides as coupling agents, and a base as a promoter, a series of phosphonothiolated binaphthol derivatives are generated. This invention features simple raw material preparation, very mild synthetic reaction conditions, convenient experimental operation, high reaction efficiency, and diverse functional groups.

This invention discloses a method for the kinetic resolution of oxaspirone via organocatalytic hydrogenolysis. Using chiral phosphate CPA as a catalyst, Hantzsch ester as a hydrogen source, and racemic oxaspirone 2,4-dien-6-one rac-1 as a substrate, a series of axially chiral biaryl phenolic compounds 2 are synthesized via asymmetric hydrogenolysis, and the central chiral oxaspirone 1 is recovered. This invention offers advantages such as simple and practical operation, readily available raw materials, high resolution coefficient, and good enantioselectivity. Some of the axially chiral biaryl products have structures similar to axially chiral cannabinol, possessing potential medicinal value.

This application provides a modified photocurable oligomer, its preparation method, and a photocurable 3D printing resin. The preparation method of the modified photocurable oligomer includes the following steps: providing an acrylic monomer, a triblock thermoplastic elastomer, a coupling agent, and a polyurethane acrylate; dissolving the triblock thermoplastic elastomer in the acrylic monomer to obtain a block copolymer mixed solution; adding the coupling agent to the block copolymer mixed solution to obtain a modified block copolymer mixed solution; adding the polyurethane acrylate to the modified block copolymer mixed solution, and mixing to obtain the modified photocurable oligomer. The modified photocurable oligomer, its preparation method, and the photocurable 3D printing resin provided in this application use a triblock thermoplastic elastomer as a toughening reinforcing phase, and chemically modify its surface using a coupling agent, enabling it to form a strong chemical bond interface with the polyurethane acrylate after pre-dispersion in the acrylic monomer.

The application relates to the technical field of composite materials, and discloses a preparation method of a multilayer composite core body, which comprises the following steps: pretreatment, spraying treatment, core composite material preparation, compounding and curing forming; the surface of a fiber base layer is chemically modified through functional pretreatment, the wettability and reactivity of the fiber surface are improved, the different fiber layers with different functional characteristics can be more closely and stably combined, and therefore the integrity, reliability and durability of the multilayer composite core body structure are enhanced; through spraying treatment, functional particles are uniformly loaded on the surface of the fiber base layer in the form of a stable dispersion liquid; the functional particles have good compatibility and bonding force with the fiber base and the interlayer composite material after being treated and surface-modified in a specific manner, the core body is endowed with specific surface functions, the interface bonding between the fiber and the base is enhanced, and the functionality, uniformity and structural strength of the core body are improved.

This invention belongs to the fields of catalytic chemistry and fine chemicals, and discloses a halogen-modified supported noble metal catalyst and its application in the synthesis of oxaragoli key intermediates. The catalyst uses alumina or modified alumina as a support, loads the active component (noble metal), and modifies its surface electronic structure through halide ions. The preparation method includes precursor conversion of the support, impregnation and reduction of the active metal, and post-modification and regulation of halide ions. The catalyst obtained by this invention exhibits excellent hydrogenation reduction activity and selectivity for compounds containing C=N or C≡N bonds under mild conditions. Under room temperature and low-pressure hydrogen conditions, this catalyst can efficiently catalyze the conversion of 2-fluoro-6-trifluoromethylbenzaldehyde oxime to the oxaragoli key intermediate 2-fluoro-6-trifluoromethylbenzylamine, showing promising industrial application prospects.

This invention discloses a geopolymer precursor powder suitable for on-site construction, along with its preparation and application methods. The preparation method for this geopolymer precursor powder includes the following steps: uniformly mixing granite powder, fly ash, and solid alkali, followed by high-temperature calcination to obtain activated powder; uniformly mixing the activated powder with blast furnace slag to obtain the geopolymer precursor powder suitable for on-site construction. This invention enhances the reactivity of granite powder through thermo-chemical activation, enabling it to participate in the geopolymerization reaction. Then, in conjunction with fly ash and blast furnace slag, a "cement-like" geopolymer cementitious material is prepared. During use, only water needs to be added to the geopolymer precursor powder to prepare a geopolymer cementitious material with high early strength at room temperature. This technology solves the problems of low granite powder utilization, slow room-temperature curing, and difficulties in on-site geopolymer construction found in existing technologies.

The present disclosure relates to polyquinoxalines containing basic groups, which are obtained by copolymerization of a dioxinone monomer and a tetramine monomer. The present disclosure also relates to proton exchange membranes formed from the polyquinoxalines containing basic groups. The polyquinoxalines containing basic groups provided by the present disclosure have excellent mechanical strength, thermal stability, chemical stability and phosphoric acid doping rate, while having site-controllable basic groups, and have broad application prospects.

This application relates to the field of catalyst technology, disclosing an electron-rich Pd nanocatalyst, its preparation method, and its application. The electron-rich Pd nanocatalyst comprises a sheet-like Mg(OH)₂ support and Pd nanoparticles uniformly loaded on the sheet-like Mg(OH)₂ support; wherein the thickness of the Mg(OH)₂ sheet is less than 2 nm; and the average particle size of the Pd nanoparticles is less than 4 nm. The preparation method includes dispersing the Mg(OH)₂ support in water, sequentially adding a palladium source and urea, refluxing at 55-65°C to obtain a precursor solution; adding a reducing agent to the precursor solution to carry out the reaction, collecting the solid deposit, washing, and drying to obtain the final product. This application, by regulating the electronic structure of the Pd nanoparticles, significantly increases the electron density on their surface, increasing the repulsion of reaction products, weakening the adsorption of reaction products on the catalyst surface, avoiding poisoning of the catalyst active sites, and improving the reactivity and selectivity of the Pd nanocatalyst for the hydrogenation of nitrile compounds at low temperatures.

This invention discloses a method for synthesizing ferrocene-isoquinoline and ferrocene-dihydroisoquinoline planar chiral compounds, belonging to the field of asymmetric catalysis technology. Using chiral phosphoric acid (CPA) as a catalyst, 1,4-dihydropyridine compound (HEH) as a hydrogen source, and racemic ferrocene-isoquinoline derivative (+ / -)-1 and ditert-butyl dicarbonate as substrates, two types of planar chiral ferrocene compounds are synthesized through asymmetric transfer hydrogenation resolution. The enantiomeric excess of the ferrocene-isoquinoline planar chiral compounds can reach 95%, while the enantiomeric excess of the ferrocene-dihydroisoquinoline carboxylic acid tert-butyl ester planar chiral compounds can reach 89%, with a resolution coefficient (S value) reaching 50. This invention achieves the hydrogenation kinetic resolution of ferrocene-isoquinoline compounds, is simple to operate, uses commercially available catalysts, operates under mild reaction conditions, and exhibits good resolution effects, showing excellent application prospects.

The invention relates to the field of carbonate polymerization, and discloses isosorbide polycarbonate and a preparation method thereof. The preparation method of the isosorbide polycarbonate comprises the following steps: under the action of a ketonic acid metal salt catalyst, taking a dihydroxy compound, diester carbonate and aliphatic dihydric alcohol as raw materials, and carrying out transesterification and polycondensation reaction to obtain the isosorbide polycarbonate. The keto acid metal salt is used as the catalyst for synthesizing the isosorbide polycarbonate, the catalyst is low in price and not prone to inactivation, and the isosorbide polycarbonate with high molecular weight and ideal transparency is catalytically synthesized.

This invention relates to a method for preparing a vanadium selenide / vanadium oxide heterojunction photo-assisted zinc-ion battery, belonging to the technical field of vanadium selenide / vanadium oxide heterojunction photo-assisted electrochemical energy storage and zinc-ion battery. The method includes the following steps: mixing a selenium source solution and a vanadium source solution to obtain a reaction precursor solution; subjecting the reaction precursor solution to a hydrothermal reaction and washing to obtain vanadium selenide material; annealing the vanadium selenide material to form a vanadium oxide layer on its surface, obtaining a vanadium selenide / vanadium oxide heterojunction composite material; mixing the vanadium selenide / vanadium oxide heterojunction composite material, a conductive agent, and a binder, adding a solvent to prepare a slurry, coating the slurry onto the surface of a current collector, and drying to obtain a photocathode. The material and its application system described in this invention exhibit good specific capacity, rate performance, and cycle stability, and demonstrate good energy storage performance under illumination conditions; this invention is beneficial for further reducing electrode polarization and promoting the synergistic enhancement of electron transport and zinc-ion storage.

This invention belongs to the field of organic synthesis technology, specifically relating to a method for synthesizing and applying an organoboroester intermediate. The method includes: stirring compound A in solvent 1 at low temperature under an inert atmosphere, and reacting it with compound B (OR) under the action of a strong base. 3 3. After stirring at room temperature, the mixture is then acidified to generate intermediate compound B; intermediate compound B reacts with R under the action of a drying agent. 2 (OH) n The reaction at room temperature yields an organoborolate intermediate compound (II); wherein the molar ratio of compound A to base is 1:1.0 to 1:1.5; and compounds A and B (OR 3 The molar ratio of compound B to R is 1:1.5 to 1:3.0. 2 (OH) n The molar ratio is 1:1.0 to 1:1.5; X 1 R is a hydrogen atom or a nitro group. 1 R is any one of hydrogen atom, C1-C20 alkyl group, substituted or unsubstituted phenyl group, or substituted or unsubstituted thiophene group. 2 (OH) n (n=1 or 2) is a monohydric alcohol or a dihydric alcohol; the desiccant is any one of anhydrous sodium sulfate, anhydrous magnesium sulfate, silica gel, and anhydrous calcium chloride. The above method is non-toxic, environmentally friendly, and produces highly reactive products.

This application relates to the field of silica purification and discloses a method for extracting high-purity silica from granite waste. First, pulsed microwave irradiation is applied to the waste powder, inducing microcracks at the phase interface by utilizing the difference in thermal expansion between metal oxide impurities and the quartz matrix. The cracked powder is then placed in a microwave high-pressure reactor, where supercritical carbon dioxide is used to force a eutectic solvent into the microcracks. Continuous microwaves are input, causing dipole polarization of the eutectic solvent, resulting in in-situ polarization heating, reducing kinetic viscosity, and accelerating coordination chelation reactions to form metal complexes. Critical point phase oscillation is performed through alternating temperature and pressure, creating a hydrodynamic pumping effect within the microcracks. A pressure-reducing valve is controlled to release pressure, and a high-speed gas flow carrying impurities is used to discharge the solvent to the external surface. The product is then obtained through washing and separation. This invention effectively solves the problem of difficulty in exposing and eluting deep impurities, significantly improving product purity.

This invention relates to the field of graphene and discloses a method for preparing highly dispersible graphene oxide with a high monolayer ratio at low temperatures. The method includes: S1: ball milling a mixture of graphite and activated carbon; S2: immersing the graphite / activated carbon mixture in an acidic solution containing hypochlorous acid and / or hypochlorite under light irradiation for a pre-oxidation reaction to exfoliate the graphite into a monodisperse state; S3: oxidizing the product of reaction S2 in a concentrated sulfuric acid / perchloric acid mixed acid system; S4: diluting the product of reaction S3 with water and then introducing a ferrous salt for a reduction reaction; and finally, separating and washing to obtain a graphene oxide dispersion. This invention can prepare highly dispersible graphene oxide with a high monolayer ratio under low temperature and mild conditions. Furthermore, during the preparation process, this invention utilizes the synergistic effect of activated carbon and chloride ions to fully disrupt the large π bonds of the conjugated aromatic domains in graphite, thereby increasing the flexibility of the graphene sheets and reducing viscosity.