84 results about "Phosphorus oxide" patented technology

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 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.

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 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 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 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.

This invention provides ammonium vanadium oxyphosphate, its preparation method, and a method for preparing vanadium phosphate oxides using it. The preparation method of ammonium vanadium oxyphosphate includes the following steps: adding a reducing agent to a vanadium-containing leachate to reduce the vanadium in the solution to an average valence state of 4.5; then adding a phosphorus source and an ammonium source; reacting to form a precipitate; filtering; and washing to obtain ammonium vanadium oxyphosphate NH4(VOPO4)2. The reaction steps of this invention are simple, the reaction conditions are mild, and the reaction process is easily controlled. This invention also discloses a method for preparing vanadium phosphate oxides using ammonium vanadium oxyphosphate, comprising the following steps: reducing and calcining ammonium vanadium oxyphosphate to prepare vanadium pyrophosphate and / or vanadium phosphate; and then oxidizing and calcining to prepare vanadium oxyphosphate. The vanadium oxyphosphate (VOPO4) prepared by this invention has high crystallinity and a large specific surface area (8-20 μm²). 2 / g), which is beneficial to improving the activity of the catalyst.

This invention belongs to the field of metal production or refining technology, and discloses a neutral extraction system and method for lithium extraction. The neutral extraction system includes a fluorine-containing compound as the main extractant, a neutral phosphorus oxide compound as a co-extractant, a modifier, and a diluent. Using this neutral extraction system, lithium can be extracted from the aqueous phase to the organic phase by directly mixing it with a lithium-containing solution. The extraction process does not require saponification pretreatment and does not introduce strong alkali, thus avoiding a series of problems caused by strong alkali.

The invention discloses a single-component epoxy adhesive and a preparation method thereof, and relates to the technical field of adhesives. When the single-component epoxy adhesive is prepared, thiazole pyridine diacid and epoxy chloropropane react to prepare a pyridone epoxy monomer; the preparation method comprises the following steps: sequentially reacting triaminomethyl phosphorus oxide with 5-hydroxymethylfurfural and epoxy chloropropane to prepare a furyl composite flame retardant; the preparation method comprises the following steps: sequentially reacting magnesium hydroxide with gamma-glycidoxypropyltrimethoxysilane and cinnamic acid to prepare modified magnesium hydroxide; and mixing epoxy resin, a pyridone epoxy monomer, the furyl composite flame retardant, the modified magnesium hydroxide, a diluent and a latent curing agent to prepare the single-component epoxy adhesive. The prepared single-component epoxy adhesive has the advantages of flame retardance and ultraviolet resistance.

We provide phosphate glass with a high refractive index and low density. [Solution] The glass composition contains phosphorus oxide (P2O5), niobia (Nb2O5), barium oxide (BaO), and potassium oxide (K2O) as essential components, and may optionally contain titania (TiO2), calcium oxide (CaO), sodium oxide (Na2O), lithium oxide (Li2O), bismuth oxide (Bi2O3), strontium oxide (SrO), tungsten oxide (WO3), and other components, with the total of TiO2 + Nb2O5 being 1.0 mol% or more and 55.0 mol% or less. The glass can be characterized by a high refractive index at 587.56 nm at relatively low density at room temperature.

Provided are an insulating-coated soft magnetic powder in which the insulation between particles and the adhesion of the insulating film are excellent and in which a powder compact having low iron loss can be produced, a powder compact magnetic core and a magnetic element each containing the insulating-coated soft magnetic powder, and an electronic device provided with the magnetic element. The insulating-coated soft magnetic powder is characterized by having: a soft magnetic powder composed of an amorphous alloy soft magnetic material of the Fe-Si-B-C system; and an insulating film containing a phosphoric acid-based glass that coats the surface of the soft magnetic powder, the average particle diameter of the insulating-coated soft magnetic powder being 1.0 μm or more and less than 15.0 μm, the phosphoric acid-based glass being a glass in which phosphorus oxide is the main component and Li is contained, the ratio Li / P of the content of Li quantified by elemental analysis to the content of P being 0.01 or more and 0.20 or less.

The glass composition includes phosphorus oxide (P2O5), niobium oxide (Nb2O5), barium oxide (BaO), and potassium oxide (K2O) as essential components, and can optionally include titanium oxide (TiO2), calcium oxide (CaO), sodium oxide (Na2O), lithium oxide (Li2O), bismuth oxide (Bi2O3), strontium oxide (SrO), tungsten oxide (WO3), and other components. The glass can be characterized as having a high refractive index at 587.56 nm with a comparable room temperature low density.

The invention relates to a porous glass ceramic having an amorphous phase and a crystalline phase, wherein the amorphous phase and / or the crystalline phase comprises at least one of the following substances: alkali metal oxide, alkaline earth metal oxide, boron oxide, phosphorus oxide, metal oxide, mixed metal oxide, metal borate, mixed metal borate, wherein the porous glass ceramic is produced by extraction of a phase-separated starting glass, wherein the starting glass does not contain any SiO2. The invention further relates to a method for converting greenhouse gases, in particular for converting CO2, wherein a greenhouse gas-containing gas is fed to a porous glass ceramic according to the invention in the presence of a cold plasma. The object of the invention is to propose a novel catalytic system and method for converting greenhouse gases, in particular CO2 and / or CO, which has higher CO2 conversion and can be better integrated into a cold plasma catalysis method.

The present application relates to the field of catalysis, in particular to a method for converting synthesis gas, which comprises: converting synthesis gas in the presence of a catalyst, wherein the catalyst contains, in parts by weight: component a, 20-50 parts, component a being selected from iron and / or iron oxide; component b, 5-20 parts, component b being selected from transition metal and / or transition metal oxide; component c, 1-10 parts, component c being selected from lanthanide metal and / or lanthanide metal oxide; component d, 0.5-5 parts, component d being selected from phosphorus and / or phosphorus oxide; component e, 20-75 parts, component e being selected from ZSM-5 type molecular sieve; wherein the amount of strong acid in the catalyst is 50-80% of the total acid amount, and the ratio of B acid amount to L acid amount is 20-50. The method for converting synthesis gas can significantly improve the selectivity of low-carbon olefins.

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.