148 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 belongs to the technical field of metallurgy, and particularly relates to a comprehensive utilization method of waste lithium iron phosphate lithium extraction slag. According to the method, the waste lithium iron phosphate lithium extraction slag is used as a raw material, potassium hydroxide is used as an additive for aerobic calcination, carbon in the lithium extraction slag is combusted, lithium iron phosphate is decomposed, then aqueous solution leaching is carried out to enable phosphorus to be dissolved into a solution in a potassium phosphate form, a leaching solution is purified and then evaporated, concentrated and crystallized to form potassium phosphate, and the lithium iron phosphate is obtained. Potassium phosphate is dissolved in water to react with ferric chloride, calcium chloride, magnesium chloride and the like to prepare ferric phosphate, tricalcium phosphate or trimagnesium phosphate, and leaching residues are dried and converted into ironmaking raw materials with iron oxide as a main component. Through the steps of water leaching pretreatment, calcination oxidation, potassium phosphate conversion, leaching residue recovery and the like, the problems that in the prior art, the waste lithium iron phosphate lithium extraction residues are low in additional value and cannot be effectively utilized are solved, the waste lithium iron phosphate lithium extraction residues are effectively utilized, and efficient separation and high-value utilization of phosphorus and iron resources are achieved.

The invention relates to a preparation method of phosphorus pentafluoride, which comprises the following steps: mixing a fluorocarbon compound with a phosphorus oxide compound and an oxidizing agent, reacting in a dry closed environment at high temperature and high pressure, collecting gas, and purifying to obtain the phosphorus pentafluoride. The invention also discloses a preparation method of lithium hexafluorophosphate, which comprises the following step: carrying out gas-solid reaction on the obtained phosphorus pentafluoride and lithium fluoride in a fluidized bed to prepare the lithium hexafluorophosphate. The method solves the problems of low purity of lithium hexafluorophosphate, difficulty in treatment of byproducts, low production efficiency and the like in the prior art.

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.

A positive electrode active material for a lithium secondary battery according to an embodiment of the present invention comprises: first lithium metal phosphorus oxide particles; second lithium metal phosphorus oxide particles, the average particle diameter (D50) of the second lithium metal phosphorus oxide particles being smaller than the average particle diameter (D50) of the first lithium metal phosphorus oxide particles, and the second lithium metal phosphorus oxide particles containing manganese; and lithium-transition metal oxide particles, the average particle diameter (D50) of the lithium-transition metal oxide particles being larger than the average particle diameter (D50) of the first lithium metal phosphorus oxide particles, and the lithium-transition metal oxide particles containing nickel.

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.

The present invention discloses a method for preparing ammonia by reducing nitrate using a bimetallic phosphide three-dimensional self-supporting electrocatalyst. The method uses the bimetallic phosphide three-dimensional self-supporting electrocatalyst as a cathode to electrochemically reduce nitrate. The bimetallic phosphide three-dimensional self-supporting electrocatalyst used is based on a three-dimensional substrate material, on which nickel-cobalt bimetallic phosphide is in situ deposited. In the nickel-cobalt bimetallic phosphide, the nickel exists in the form of Ni 3+ , the existing forms of cobalt include Co 3+ and Co 2+ Phosphorus exists in the form of phosphorus oxides and ionic phosphorus. The method of the present invention has the advantages of simple process, convenient operation, low energy consumption, low cost, mild reaction conditions, good removal effect, high ammonia selectivity, no generation of toxic and harmful substances, and environmental friendliness. It can not only efficiently reduce nitrates, but also convert more nitrates into ammonia, with high use value and good application prospects.

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.

The present invention provides a wave-absorbing adhesive film, a wave-absorbing prepreg, and preparation methods thereof. The weight ratio of the resin to the magnetic medium type absorbent in the wave-absorbing adhesive film is 15 to 35:30 to 70, wherein the particle size of the magnetic medium type absorbent is less than or equal to 15 μm. The magnetic medium type absorbent includes a magnetic medium absorbent body and a surface modification layer, and the surface modification layer is a silica coating layer or a phosphorus oxide coating layer. The viscosity of the resin at 60 to 80 °C is less than or equal to 10,000 cps. In this application, targeted designs are carried out on both the resin material and the magnetic medium type absorbent of the wave-absorbing adhesive film. Even when the content of the magnetic medium material is relatively high, or even when it is the main body of the composite material, its uniform dispersion in the resin material is still ensured, ensuring the stable control of the electromagnetic parameters, areal density and thickness of the finally formed wave-absorbing prepreg.

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.

The invention relates to the technical field of cable materials and discloses an environmentally friendly and highly flame-retardant cable and a preparation method thereof. The cable comprises a conductive core, an insulating layer and a flame-retardant protective sheath material. The flame-retardant protective sheath material is prepared by mixing, cross-linking and extruding granulation using LLDPE as a base material, supplemented with EVA, a compatibilizer and additives such as nitrogen-phosphorus-silicon modified brucite powder. The nitrogen-phosphorus-silicon modified brucite powder is prepared by chemically bonding triallyl isocyanurate, bis(4-methoxyphenyl)phosphine oxide and the like with hydroxyl groups on the surface of the brucite powder. The combination of the two can enable the cable material to obtain better flame-retardant performance. Simultaneously, siloxane is hydrolyzed to form a Si-O-Si cross-linked structure between the polyethylene matrix, thereby improving interface compatibility and allowing the brucite powder to be evenly "embedded" in the polyethylene system to form a physically cross-linked core, which plays a role in stress absorption and load transmission, and has no secondary pollution to the environment, and is safe and environmentally friendly.

This method for recovering phosphorus includes adding a reducing agent containing at least one of metallic silicon and metallic aluminum and an alkali metal compound to steelmaking slag containing a phosphorus oxide to reduce the phosphorus oxide with the reducing agent in a state including the liquid phase.

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 invention discloses a solid acid vanadium phosphorus oxide low-temperature denitration catalyst and a preparation method thereof, and belongs to the field of low-temperature flue gas denitration. The catalyst takes amine modified amorphous solid acid vanadium phosphorus oxide as an active component and anatase type titanium dioxide as a carrier, and the mass of the active component accounts for 5-20wt% of the weight of the catalyst. The preparation method of the catalyst comprises the following steps: dissolving V2O5 in an oxalic acid solution, heating the mixture to 100 DEG C, and fully stirring to form a dark green solution; then, sequentially adding n-propylamine and hypophosphorous acid in proportion, uniformly stirring and fully reacting; then, evaporating and drying the mixed solution to form a fluffy solid; and fully grinding the obtained solid, calcining in a tubular furnace in a reducing atmosphere, and finally loading on anatase type TiO2. The preparation method is simple, wide in raw material source and low in cost; the prepared amine modified amorphous vanadium phosphorus oxide catalyst has high low-temperature denitration activity and high sulfur resistance, and can promote implementation of pollution reduction and carbon reduction of non-electric industrial flue gas.

This application proposes a long-lasting phosphor resistant to high-alkaline solutions and a preparation method thereof. The aluminate long-lasting phosphor is coated with phosphate and then with tetraethyl orthosilicate to obtain the high-alkaline solution-resistant long-lasting phosphor. The phosphate coating is first applied, and after the phosphate and phosphor are tightly bonded, a silicon oxide composite coating is then applied. This creates a dense silicon-phosphorus oxide film that effectively resists corrosion in strong alkaline solutions. This method solves the problems of agglomeration and light decay in aluminate long-lasting phosphors and increases their service life in strong alkaline solutions.