119 results about "Phosphorus oxide" patented technology

The present invention belongs to the technical field of anti-corrosion coatings, and discloses an organophosphorus-modified epoxy acrylic resin composite coating and a preparation method thereof. The present invention adopts a phosphorus oxide containing a benzene ring as a reactive group, and realizes the modification of acrylate by grafting an acrylate monomer through the ortho-C-H bond on the activated benzene ring. At the same time, the selected phosphorus oxide can also be connected with layered vermiculite and boron nitride through a covalent bond, which is beneficial to improve the dispersibility of inorganic fillers in the coating, avoid the occurrence of local agglomeration, and strengthen the compactness of the epoxy acrylic resin composite coating. In addition, the introduced organophosphorus compound can also undergo a strong chelating effect with the substrate, and form a stable metal salt passivation film through covalent bond and metal complexation to prevent the erosion of the medium, thereby further improving the salt resistance of the substrate. The modified water-based acrylic resin composite coating prepared by the present invention is green and environmentally friendly, has excellent salt spray resistance and chemical corrosion resistance, and can be widely used in the field of metal corrosion protection.

The invention provides a preparation method and application of a lithium iron phosphate positive electrode material, and belongs to the technical field of lithium batteries. The method comprises the following steps: S1, providing a mesoporous template; s2, filling a pore channel of the mesoporous template with an iron source and a phosphorus source through gas-phase transmission, and performing heat treatment to form an iron-phosphorus oxide precursor; s3, enabling a lithium source to react with the iron phosphorus oxide precursor through gas-phase lithium infiltration to generate lithium iron phosphate; s4, depositing a continuous carbon layer on the surface of the lithium iron phosphate through chemical vapor deposition; and S5, removing the mesoporous template to obtain the lithium iron phosphate / carbon composite material with the three-dimensional bicontinuous network structure. According to the preparation method, efficient utilization of an iron source, a phosphorus source and a lithium source is realized through gas-phase transmission and gas-phase lithium infiltration, the preparation cost is reduced, a continuous carbon layer is deposited on the surface of lithium iron phosphate in the chemical vapor deposition step, and the conductivity and the cycling stability of the material are further improved.

The invention relates to the technical field of environmental waste treatment, and discloses a preparation method of modified household garbage incineration fly ash, the modified household garbage incineration fly ash comprises the following components by mass: 90-99 parts of a fly ash matrix; 0.1 to 2 parts of a plasma activation layer; 0.5 to 8 parts of a silicon oxide coating layer; the preparation method comprises the following steps: pretreating the fly ash; performing plasma activation; preparing a mineralizing solution; performing biomimetic mineralization; and calcining at low temperature. The plasma activation layer is introduced, the silicon oxide coating layer is constructed, and the phosphorus oxide or the boron oxide is cooperatively introduced, so that the microstructure and the surface chemical property of the material are effectively optimized, the specific surface area and the pore volume of the material are increased, and a microporous, mesoporous and macropore synergistic multistage pore channel structure is constructed; the adsorption capacity and the adsorption rate of various waste gas pollutants are improved.

The invention relates to the technical field of light-cured materials, in particular to light-cured resin as well as a preparation method and application thereof. The structural general formula of the light-cured resin is as shown in formula 1, wherein R1 is selected from one of C1-C20 straight-chain alkyl, branched-chain alkyl and cyclic alkyl; r2 is selected from hydrogen or methyl; r3 is selected from one of ethylene, propylene and butylidene; r4 is selected from one of hydrogen, methyl and cyclohexyl; n1 is an integer selected from 1-40, and n2 is an integer selected from 10-60. The resin is a multi-block polymer containing phosphorus oxide, organic silicon chain segments and unsaturated double bonds, has light curing activity and low stripping performance, and meanwhile has good adhesive force and does not generate migration; and when being applied to the optical UV imprinting adhesive, the high-precision transfer printing of the optical film with special textures and fine patterns can be obviously improved, the mold residue is reduced, the service life is prolonged, and the high quality, high yield and long-term stability of the optical film are ensured.

The present application provides a shaped catalyst for selective oxidation of n-butane and a preparation method thereof. The shaped catalyst comprises an active component and a hydroxyl silicate, wherein the active component comprises vanadium phosphorus oxide. The present application also provides a method for preparing maleic anhydride by using the catalyst. In the preparation process of the catalyst, the hydroxyl silicate is added as a lubricant and a reinforcing agent, the mechanical strength of the shaped body of the catalyst after the hole expansion treatment is improved, various shaped bodies with stable structures are obtained, and the selective oxidation of n-butane can produce valuable products with high selectivity.

The invention relates to the technical field of batteries, in particular to a positive electrode material, a preparation method and application thereof and an all-solid-state battery. The positive electrode material comprises an inner core and an outer core, wherein the inner core contains a nickel-rich ternary material; the interface modification layer is coated on at least part of the surface of the inner core, and the interface modification layer comprises lithium phosphorus oxide and metal sulfide. According to the positive electrode material, the interface impedance of the battery can be better reduced, the critical current density is improved, and the cycle life is prolonged.

The invention discloses a preparation method of a potassium-doped nitrogen oxidation phosphorescent catalyst, and belongs to the technical field of photocatalytic material preparation. The method comprises the following steps: by taking phosphorus oxynitride and potassium thiocyanate as raw materials, grinding and mixing, carrying out molten salt reaction at 400-600 DEG C for 1-5 hours, and cooling, washing and drying a reaction product to obtain the potassium-doped phosphorus oxynitride crystal. The method is simple in process, mild in reaction condition, low in cost and easy for large-scale production. Through potassium element doping, the visible light absorption range of phosphorus oxynitride is effectively widened, the recombination rate of photo-induced electron-hole pairs is remarkably reduced, and the carrier separation and transmission efficiency is improved, so that the photocatalytic activity of the material is greatly improved. The prepared K-PON photocatalyst has wide application prospects in the fields of photocatalytic reduction of uranium-containing wastewater, degradation of organic pollutants, energy conversion and the like.

Glass compositions include one or more of phosphorus oxide (P2O5), niobia (Nb2O5), titania (TiO2), potassium oxide (K2O) and lithium oxide (Li2O) as essential components and may optionally include barium oxide (BaO), zinc oxide (ZnO), V2O5 (vanadia), FeO (iron oxide) and other components.

The invention relates to a vanadium phosphorus oxide catalyst and a preparation method and application thereof, the preparation method comprises the following steps: first roasting at least five metal salt-based eutectic solvents in an oxidizing gas atmosphere to obtain a high-entropy oxide; mechanically mixing the high-entropy oxide with a vanadium-phosphorus-oxide precursor, and then performing secondary roasting to obtain the vanadium-phosphorus-oxide catalyst, according to the preparation method, the high-entropy oxide and the vanadium-phosphorus-oxygen precursor are compounded to obtain the vanadium-phosphorus-oxygen catalyst with high catalytic activity, in the reaction of preparing maleic anhydride through catalytic oxidation of n-butane, high selectivity and yield of maleic anhydride are ensured while a high n-butane conversion rate is obtained, the n-butane conversion rate is preferably as high as 93.6% or above, and the yield of maleic anhydride is greatly improved. Meanwhile, the selectivity of the maleic anhydride is preferably as high as 62.6% or above, and the yield of the maleic anhydride is preferably as high as 61.0% or above; the preparation raw materials are wide in source, the preparation process is simple, cost is low, and industrial production is easy.

The application discloses a preparation method and application of a multi-phenyl phosphorus oxide compound and belongs to the technical field of organic synthesis. Different properties of raw materials are respectively dissolved through double solvents, a catalyst is added into the system, and the entering of the alkali metal salt reactant into the organic phase reaction is helped to be dissolved to obtain a molecular level reactant, so that the reaction is promoted to be completely carried out, the yield of a product is improved, the proportion of impurities, such as the reactant, contained in the product is reduced, the purity of the product is improved, and the high-purity product is a material with low dielectric property. The material is tested in various performances, and excellent flame retardance and low dielectric constant are obtained.

A method for producing phosphorus in which a reaction for forming gaseous phosphorus (g) by bringing phosphorus oxide generated by heating a liquid phosphoric acid compound into contact with a carbon material to reduce the phosphorus oxide and for condensing the gaseous phosphorus (g) to obtain liquid phosphorus (L) is conducted by a flow reaction with a nonoxidizing gas flow, wherein the reduction reaction of the phosphorus oxide is conducted in a carbon material-packed bed, and the condensation of the formed gaseous phosphorus (g) is substantially conducted in a condensation accelerator-packed bed which is disposed downstream of the carbon material-packed bed in contact with the carbon material-packed bed.

The invention relates to the technical field of hot sherardizing coatings, in particular to a production process for improving the corrosion resistance of a hot sherardizing coating, which comprises the following steps: after a metal workpiece is subjected to acid pickling derusting treatment, stainless steel grit is adopted for shot blasting treatment; preparing furnace charge, mixing 50 parts by mass of zinc powder with a specific particle size, 30 parts by mass of aluminum oxide, 20 parts by mass of zinc oxide, 3 parts by mass of graphite powder, 2 parts by mass of cerium oxide, 2 parts by mass of lanthanum oxide, 2 parts by mass of ammonium oxide and 3 parts by mass of zirconium oxide according to a set mass ratio, adding a zircon sand carrier, and uniformly stirring; according to the method, the pretreatment process is standardized, a 10% hydrochloric acid solution is adopted for acid pickling and matched with deionized water for flushing, and then stainless steel grit shot blasting is conducted according to specific parameters, so that the effects of thoroughly removing oxide skin, rust and residual acid liquor on the surface of the workpiece, optimizing the surface roughness and providing a good substrate for zinc atom diffusion bonding are achieved.

The invention discloses a preparation method of tris (propargyl) phosphorus oxide, and belongs to the technical field of battery electrolyte additives, and the preparation method specifically comprises the following steps: S1, carrying out low-temperature in-situ Grignard exchange and addition reaction, the method comprises the following steps: carrying out in-situ Grignard exchange and addition reaction on phosphorus trichloride, an alkyl lithium reagent and propargyl alcohol in an organic solvent to generate an intermediate tris (propargyl) phosphorous acid; s2, oxidation reaction: adding an oxidizing agent into the reaction system obtained in the step S1, and carrying out oxidation reaction to obtain tris (propargyl) phosphorus oxide; according to the method, the technical bottleneck of preparing the phosphorus-containing alkyne additive by a traditional fractional step method is broken through, a one-pot low-temperature synchronous dropwise adding in-situ reaction process is initiated, and efficient and high-selectivity synthesis of tris (propargyl) phosphorus oxide is realized.

This invention relates to the field of chemical technology, and more particularly to an extractant and a method for extracting lithium from lithium-containing solutions. The extractant comprises a phosphorus oxide compound and a halogen. The phosphorus oxide compound is a neutral phosphorus extractant; the halogen is at least one selected from chlorine, bromine, and iodine. The extractant selected in this invention forms [Li·S] when extracting lithium ions from lithium-containing solutions. + [X·(Y2) n ] ‑ The complex can effectively achieve selective extraction of lithium salts from various lithium-containing solutions, thus exhibiting highly efficient selectivity for lithium ions, accurately identifying and extracting lithium, and maximizing the extraction of lithium elements from lithium-containing solutions, providing an extremely effective technical means for the recovery and utilization of lithium resources.

Embodiments of the present invention provide a lithium secondary battery including a positive electrode, a negative electrode, and a non-aqueous electrolyte solution. The positive electrode includes a positive electrode active material layer including a first positive electrode active material including lithium metal phosphorus oxide particles and a second positive electrode active material including lithium transition metal oxide particles. The negative electrode and the positive electrode are oppositely arranged, and the non-aqueous electrolyte comprises an organic solvent and lithium salt. In the positive electrode active material layer, a weight ratio of the first positive electrode active material to the second positive electrode active material is 1.5 to 9. And the concentration of the lithium salt in the non-aqueous electrolyte is more than 1M.

The present invention belongs to battery materials, specifically to Na a Fe b X c Y d (BO3) e A positive electrode active material, wherein X is at least one of F, Cl, and Br; Y is at least one of a phosphorus oxide anion and a silicon oxide anion; a is in the range of 1 to 4, b is in the range of 1 to 4, c is in the range of 0.3 to 2, d is in the range of 0.3 to 2; and e is in the range of 0.01 to 0.1. The present invention also includes methods for preparing and using the material. The material of the present invention has excellent performance, can adapt to the requirements of high electrode thickness loading, and can exhibit excellent electrochemical performance at high loading thicknesses.

The application discloses a cerium ion coordination terpyridyl group anti-corrosion and flame-retardant dual-functional filler, a preparation method and application thereof, and has a structural formula. The application has the dual-functional characteristics of anti-corrosion and flame-retardation, uses a siloxane skeleton structure as a connecting agent to improve the toughness of EP; DOPO contains phosphorus elements, and a phosphorus compound can be decomposed at high temperature to generate phosphorus oxide, and these oxides can form a protective layer in a flame to reduce the interaction between oxygen and combustible materials, and the combustion reaction is slowed down or inhibited; pyridine can adsorb metal ions in a corrosive environment to play an anti-corrosion role; meanwhile, N atoms on the pyridine ring can generate N2 in the combustion process, which can dilute the oxygen concentration in the gas and play an important role in the intumescent flame-retardant process; Ce 3+ is coordinated with pyridine to form a coordination compound, a dense adsorption film is formed on the surface of a matrix, and corrosion protection is provided; meanwhile, it can combine a plurality of small molecule monomers to form a long chain chelate, and the performance of the filler is further improved.

The present invention relates to a positive active material for all-solid-state rechargeable batteries, a preparation method thereof, a positive electrode for all-solid-state rechargeable batteries, and all-solid-state rechargeable batteries, the positive active material comprising lithium transition metal composite oxide particles and a coating layer positioned on the surface of each lithium transition metal composite oxide particle, wherein the coating layer comprises: coating particles containing a metal oxide; and a low-melting metal oxide including phosphorus oxide, lead oxide, vanadium oxide, or a combination thereof.

The invention discloses a phosphorus oxide modified hard carbon negative electrode material and a preparation method and application thereof, and the preparation method comprises the following steps: mixing hard carbon powder, a phosphorus-containing precursor and polyvinylpyrrolidone in proportion, dissolving in absolute ethyl alcohol, and stirring to form a uniform solution; drying after filtering, and calcining in an inert atmosphere to obtain hard carbon composite particles coated with PxOy on the surfaces; mixing the hard carbon composite particles with an adhesive and conductive carbon to prepare a hard carbon composite electrode material; the hard carbon composite electrode material is used for assembling a sodium ion battery negative electrode in an electrolyte containing NaPF6, and a stable phosphate-enriched SEI layer is formed through a first charging and discharging process; according to the invention, the PxOy coating is introduced on the hard carbon surface, and the inorganic SEI containing metal phosphate is generated in situ in the first charge-discharge process, so that high stability, high ionic conductivity and excellent cycle performance are realized, an efficient and practical technical path with industrialization potential is provided for the high-performance sodium ion battery negative electrode, and the preparation method is obviously superior to the prior art.

The invention provides a preparation method of a vanadium-phosphorus-oxide catalyst, the vanadium-phosphorus-oxide catalyst and application of the vanadium-phosphorus-oxide catalyst, and relates to the technical field of preparation of maleic anhydride through butane oxidation. The preparation method of the vanadium phosphorus oxide catalyst comprises the following steps: mixing a pentavalent vanadium compound, a pentavalent phosphorus compound, a first cocatalyst and an organic alcohol solution, and reacting to obtain a first precursor; carrying out first-stage calcination on the first precursor in an inert atmosphere or a vacuum condition, and then carrying out second-stage calcination in an oxygen-containing atmosphere to obtain a second precursor; placing the second precursor in a solution containing a second cocatalyst, and carrying out dipping treatment to obtain a third precursor; and mixing the third precursor with a lubricant, carrying out molding treatment, and then carrying out activating treatment to obtain the vanadium phosphorus oxide catalyst. The vanadium phosphorus oxide catalyst prepared by the preparation method of the vanadium phosphorus oxide catalyst has high activity, high selectivity and good stability, and the method is suitable for industrial production.

An insulator-coated soft magnetic powder includes:a soft magnetic powder formed of an Fe—Si—B—C-based amorphous alloy soft magnetic material; andan insulating coating that coats a surface of the soft magnetic powder and contains a phosphate-based glass;wherein the average particle diameter is 15.0 μm or more and 40.0 μm or less;the phosphate-based glass is a glass containing phosphorus oxide as a main component and containing Li; andthe ratio Li / P of the content of Li to the content of P quantified by an elemental analysis method is 0.01 or more and 0.20 or less.

The application provides a preparation method and application of a lithium iron phosphate positive electrode material, and belongs to the technical field of lithium batteries. The method comprises the following steps: S1: providing a mesoporous template; S2: filling iron sources and phosphorus sources into the pore channels of the mesoporous template through gas phase transmission, and performing heat treatment to form an iron-phosphorus oxide precursor; S3: making lithium sources react with the iron-phosphorus oxide precursor through gas phase lithium infiltration to generate lithium iron phosphate; S4: depositing a continuous carbon layer on the surface of the lithium iron phosphate through chemical vapor deposition; and S5: removing the mesoporous template to obtain a lithium iron phosphate / carbon composite material with a three-dimensional double-continuous network structure. Through gas phase transmission and gas phase lithium infiltration, the application realizes efficient utilization of the iron sources, the phosphorus sources and the lithium sources, reduces the preparation cost, and the chemical vapor deposition step deposits a continuous carbon layer on the surface of the lithium iron phosphate, thereby further improving the conductivity and the cycle stability of the material.

The present application relates to the field of Kovar alloy production, and particularly relates to a preparation method of a Kovar alloy mother electrode, comprising: loading raw materials into an electric arc furnace for smelting to obtain a first mixture, wherein the raw materials comprise iron-nickel-cobalt scrap and first auxiliary materials; loading the first mixture into an AOD furnace for blowing to obtain a second mixture; and loading the second mixture, nickel, iron, cobalt and manganese into a vacuum induction furnace for smelting to obtain the Kovar alloy mother electrode. In the present application, high temperature in the electric arc furnace promotes oxidation of impurities on the surface of scrap steel into gas or slag, and by adding limestone, fluorite and other slagging agents, an alkaline furnace (CaO~MgO~SiO2) is formed to adsorb silicon oxide, phosphorus oxide and other inclusions. When the AOD furnace is used for blowing, oxygen or argon is blown in to promote the aggregation and floating of inclusions to the slag layer, and by adding silicon iron, aluminum powder and other reducing agents, part of the oxidized inclusions are reduced and deoxidized, the oxygen content is reduced, and the gas content and inclusion grade of the Kovar alloy mother electrode are reduced.

The glass composition includes, as essential components, one or more of tungsten oxide (WO3), boron oxide (B2O3), lanthanum oxide (La2O3), niobium oxide (Nb2O5), titanium dioxide (TiO2), and zirconium oxide (ZrO2), and may optionally include yttrium oxide (Y2O3), barium oxide (BaO), calcium oxide (CaO), antimony oxide (Sb2O3), phosphorus oxide (P2O5), lead oxide (PbO), germanium oxide (GeO2), and other components. The glass composition is characterized by a high refractive index and a high transmittance in the blue light portion of the electromagnetic spectrum.

The invention discloses a gasoline engine tail gas purification three-way catalyst and a preparation method thereof.The gasoline engine tail gas purification three-way catalyst comprises a carrier and a coating, the carrier is coated with the coating, the coating comprises aluminum oxide, precious metal and a cerium-zirconium composite oxygen storage material, and the cerium-zirconium composite oxygen storage material is prepared from, by mass, 5-10% of aluminum oxide, 5-10% of precious metal and 5-10% of cerium-zirconium composite oxygen storage material. Comprising 40%-70% of zirconium oxide, 20%-50% of cerium oxide, 2%-3% of lanthanum oxide, 2%-3% of yttrium oxide, 1%-2% of phosphorus oxide, 1%-2% of tin oxide and 2%-3% of antimony oxide. Therefore, by using the gasoline engine tail gas purification three-way catalyst, the cost can be reduced, and the catalytic performance of the gasoline engine tail gas purification three-way catalyst is equivalent to that of a Pr / Nd adding scheme.

The invention discloses a CoFe2O4-charcoal adsorption material as well as a preparation method and application thereof. The preparation method comprises the steps of aldolization, amine-rich modification reaction, sulfydryl reaction, hydrothermal synthesis and the like. The preparation method comprises the following steps: sequentially carrying out acid activation to enable the surface of a biochar pore to have active hydroxyl, carrying out acetal modification on the biochar pore surface by adopting dialdehyde so as to introduce an aldehyde group into the surface of the biochar pore, grafting PEI rich in amino groups by utilizing a Schiff base reaction, and finally generating sulfimide-S-N-through sulfydryl and-C = N-by utilizing cysteine with sulfydryl. A plurality of functional groups such as amido, phosphoryloxy, carboxyl, hydroxyl and dynamic sulfydryl are successfully introduced into the surface of the novel adsorption material, a multi-synergistic adsorbent system is formed, and heavy metal ions in different forms can be efficiently complexed or electrostatically adsorbed; the adsorption material has the characteristics of high adsorption capacity, good universality to various heavy metal ions, excellent anti-interference performance, easiness in separation, strong reusability and the like.

The invention relates to the technical field of hydrogenation catalysis, and discloses a hydrofining catalyst as well as a preparation method and application thereof. The hydrofining catalyst contains a composite carrier, an active metal oxide and a non-metal auxiliary agent, and the content of the composite carrier is 54-98 wt%, the content of the active metal oxide is 1-40 wt%, and the content of the non-metal auxiliary agent is 0.5-6 wt% based on the total weight of the hydrofining catalyst, the composite carrier contains aluminum oxide and / or silicon oxide, cerium oxide and a metal additive; the active metal oxide is at least one of molybdenum oxide, tungsten oxide, cobalt oxide and nickel oxide; the non-metal additive is phosphorus oxide and / or boron oxide; the metal additive is selected from at least one of zinc oxide, iron oxide, manganese oxide, copper oxide and magnesium oxide. The hydrofining catalyst is high in hydrogenation efficiency and long in service life, and a product obtained after two-stage hydrogenation is ultralow in sulfur and low in bromine value.

The application provides a combined vanadium-phosphorus catalyst system and application thereof, which comprises at least two catalyst beds, the total porosity of the catalyst bed near the raw material inlet is the largest, different vanadium-phosphorus catalysts are filled in different catalyst beds, and the general formula of the vanadium-phosphorus catalyst is VP x M y O z Vanadium-phosphorus oxide active component, wherein x=0.9-2, y=0-0.3, z is a value satisfying a stoichiometric balance, and M is from a promoter element component. The combined vanadium-phosphorus catalyst system can effectively reduce the reaction hot spot and catalyst bed pressure drop, improve the catalytic performance and maintain the operation stability of the catalyst in the gas phase selective oxidation reaction of hydrocarbons.

The invention relates to the technical field of secondary battery materials, in particular to a phosphorus-carbon composite material for a lithium ion battery and a preparation method thereof.The preparation method comprises the following steps that red phosphorus is placed at the bottom of a reactor, quartz wool is adopted to cover the red phosphorus, and porous carbon is laid on the quartz wool; the reactor is subjected to vacuumizing treatment, the treated reactor is placed in a muffle furnace to be subjected to heat treatment, and the phosphorus-carbon composite material is obtained. According to the method, red phosphorus is used as a phosphorus source and is spatially isolated from porous carbon in a quartz tube; under the heating condition, phosphorus volatilizes and then penetrates through the partition plate, after the temperature is reduced, most of the phosphorus is deposited in nanopores of the porous carbon, and a small part of the phosphorus generates phosphorus oxide on the surface of the porous carbon in situ, so that the phosphorus-carbon composite material with good capacitive performance is formed. The method is simple and convenient in process, high in preparation efficiency and high in yield, and the prepared phosphorus-carbon composite material is uniform in texture, safe, reliable, mild in condition and low in cost and can be used for industrial large-scale production.