40results about "Phosphorus oxyacids" patented technology

Disclosed are an aluminum diethylphosphinate crystal with a low fine powder content, a preparation method therefor and use thereof in flame retardance of glass fiber-reinforced engineering plastics. In the present invention, a phosphorus-containing aluminum salt complex is used as a seed crystal and is added in a crystallization process of preparing aluminum diethylphosphinate, such that the crystallization process can be effectively regulated and controlled, aluminum diethylphosphinate crystal particles with a low fine powder content, narrow distribution and a large particle size can be obtained, and the problems that the existing aluminum diethylphosphinate powder is prone to bridging, unsmooth feeding and the like can be solved. The present application is applicable to a processing technology of halogen-free flame retardant glass fiber-reinforced engineering plastics. The prepared aluminum diethylphosphinate includes a small amount of phosphorus-containing aluminum salt complex seed crystals, and the flame retardant property of the aluminum diethylphosphinate is not affected.

The invention belongs to the technical field of new energy materials, and particularly relates to an MOF (Metal Organic Framework) encapsulated polyoxometallate electro-catalytic material capable of being used for glycerol oxidation and a preparation method of the MOF encapsulated polyoxometallate electro-catalytic material. And the electrocatalytic material is an MOF-74 material in which a Keggin type polyoxometallate H3PMo12O40 is encapsulated. The invention further discloses a preparation method of the metal-organic framework material. According to the invention, PMo12 molecules are introduced in a solvothermal reaction process, and a simple and convenient one-step method is adopted for in-situ synthesis of the MOF-74 (PMo12atMOF-74) electrocatalytic material with PMo12 encapsulated in pore channels on a foamed nickel matrix. The preparation technology provided by the invention is simple and convenient in process, the prepared electro-catalytic material can be directly used as a catalyst electrode, the electron interaction between a PMo12 object and MOF-74 promotes the generation of high-valence metal active species on the surface of MOF, and the obtained catalyst material has excellent GOR electro-catalytic performance.

The present invention relates to a process for producing dipentaerythritol from pentaerythritol in the presence of sulfolane and a heterogeneous polyacid catalyst supported on a carrier comprising a compound selected from the group consisting of: SnO2, mesoporous silica, and zeolite.

A method for preparing an ordered cross-stacked metal oxide nanowire array is provided. The method includes the following steps: conducting synthesis by using an amphiphilic diblock copolymer as a structure directing agent, tetrahydrofuran (THF) as a solvent and polyoxometalates (POMs) as an inorganic precursor, where the diblock copolymer can interact with POMs via an electrostatic force to form a core-shell cylindrical micelle in the solvent, which self-assembles to form an ordered multilayer-crossed organic-inorganic composite nanostructure during an evaporation process; the template is removed by calcination in air, thereby obtaining ordered and crossed metal oxide nanowires with various elements doping. The nanowire array material has a high specific surface area, a high crystallinity, and realizes uniform doping of heteroatoms.

A method for the processing a mixed particulate evaporite minerals with particles of size at least 0.25 mm where the minerals comprise a first evaporite with a first metal contaminant and a second eva

A compound represented by the formula (1): XOa (1) where X = NbbSrc, NbbPd, NbbSrcPd, or SrcPd, wherein, when X = NbbSrc, the ratio of c:b is from 1:100 to 0.95:1 or from 1.05:1 to 100:1, wherein, when X = NbbPd, the ratio of b:d is from 1:100 to 0.45:1 or from 0.55:1 to 100:1, wherein, when X = NbbSrcPd, the ratio of c:b is from 1:100 to 100:1 and the ratio of b:d is from 1:100 to 2.95:1, wherein, when X = SrcPd, the ratio of c:d is from 1:100 to 1:3.05, from 1:2.95 to 1:1.05, or from 1.55:1 to 100:1, and wherein any niobium present within the compound is in the 4+ oxidation state.

A positive electrode material for a lithium-ion secondary battery includes granulated bodies 10 each having a core 11 and a carbon coating 12. The core 11 is made of olivine-type lithium manganese iron phosphate represented by a general formula LiMnxFeyPO4 ("x" and "y" are numerical values satisfying "x + y = 1", "0 < x < 1", and "0 < y < 1"). The carbon coating 12 is formed on a surface of the core 11. The core 11 has a structure in which primary particles of the olivine-type lithium manganese iron phosphate are aggregated. The primary particles have a particle size of 100 nm or less. The granulated bodies 10 have a pore volume of 0.2 cm3 / g or less in a pore size range of 2 nm to 300 nm, inclusive. The granulated bodies 10 have a carbon content of 1.8 mass% or greater and 3.0 mass% or less.

A compound represented by the formula (1): XOa (1) where X = NbbSrc, NbbPd, NbbSrcPd, or SrcPd, wherein, when X = NbbSrc, the ratio of c:b is from 1:100 to 0.95:1 or from 1.05:1 to 100:1, wherein, when X = NbbPd, the ratio of b:d is from 1:100 to 0.45:1 or from 0.55:1 to 100:1, wherein, when X = NbbSrcPd, the ratio of c:b is from 1:100 to 100:1 and the ratio of b:d is from 1:100 to 2.95:1, wherein, when X = SrcPd, the ratio of c:d is from 1:100 to 1:3.05, from 1:2.95 to 1:1.05, or from 1.55:1 to 100:1, and wherein any niobium present within the compound is in the 4+ oxidation state.

The invention relates to inorganic compounds having a structure of argyrodite type which are derived from a process comprising a step of grinding alkali metal sulfide, alkali metal sulfate, phosphorus pentasulfide and an alkali metal halide. Also described are electrode materials, electrodes, electrolytes comprising said compounds, and the uses thereof in electrochemical cells, in particular in batteries known as all-solid-state batteries. Prolonged grinding of the precursors, followed by little or no annealing, gives compounds of formula M6-xPS5-x-yOyZ1i+x or M6-x2yPS5-x-yOyZi+x in which M is chosen from Li, Na and K, Z is a halogen atom chosen from F, Cl, Br and I, where x denotes the number of Z in excess of 1 or is equal to zero, and y is a number other than zero.

The present invention discloses a two-dimensional polyoxometalate nanomaterial and a preparation method and application thereof. The two-dimensional polyoxometalate nanomaterial has a lamellar structure, and the lamellar structure is composed of polyoxometalate clusters arranged in a hexagonal shape. The material has good electron transmission capability and excellent thermal / chemical stability, and at the same time has a porous lamellar structure and a large specific surface area. When applied to a photodetector, it has excellent photoelectric detection performance in different acid-base environments, exhibits excellent photoelectric response speed, and has good long-term stability in harsh application environments.

The present invention provides a modified ternary positive electrode material and a preparation method and application thereof. The preparation method comprises the following steps: (1) preparing manganese sulfate into a manganese sulfate solution, spraying the manganese sulfate solution by a spraying method to obtain a ternary positive electrode material surface; (2) mixing the material with a solvent to obtain a suspension, dripping the suspension, a manganese source solution, an iron source solution and a complexing agent solution into the solvent at the same time for reaction, adjusting the pH value, and obtaining a precursor; (3) mixing the precursor, a lithium source and a phosphorus source, adding a carbon source, grinding and sintering, and obtaining the modified ternary positive electrode material; wherein, in the coating layer of the precursor material obtained in step (2), the content of manganese element decreases from the interface to the outside along the core, and the content of iron element increases from zero along the interface to the outside along the core. The present invention overcomes the safety problem of high-nickel ternary materials on the one hand, and avoids the reaction between lithium manganese iron phosphate and the ternary material when the carbon coating layer is formed on the other hand.

The application provides a lithium-containing nickel-manganese composite oxide, a preparation method thereof, a positive electrode sheet containing the lithium-containing nickel-manganese composite oxide, a secondary battery and an electric device, and the lithium-containing nickel-manganese composite oxide has a core-shell structure, comprising an inner core and a shell coated on the surface of the inner core, the inner core comprises Li x (Ni y Mn 2‑y ) 1‑m M m O4, M comprises one or more selected from Mg, a fourth sub-group element to a sixth sub-group element, a third main group element to a fifth main group element and a lanthanide series element, 0.95≤x≤1.10, 0.40≤y≤0.60, 0.001≤m≤0.015, and the shell comprises aluminum lithium phosphate and optionally comprises aluminum lithium phosphate and aluminum phosphate. The lithium-containing nickel-manganese composite oxide provided by the application can make the secondary battery simultaneously have high energy density, good cycle performance and storage performance and low gas production.

According to the present invention, provided is a carbonate- and magnesium-substituted hydroxyapatite having a particle size of 5 nm or more and 60 nm or less, wherein a portion of the calcium atoms in the hydroxyapatite are substituted with magnesium atoms and a portion of phosphate groups are substituted with carbonate groups.

A process for preparing a fluorinating reagent from a calcium-containing compound is disclosed. The process bypasses the requirement to form hydrofluoric acid. The fluorinating reagent can be used to prepare high-value fluorochemicals.

Provided is a dielectric body having a high dielectric constant and a change rate of the dielectric constant of 30% or less, in a temperature range from −50° C. to 350° C. An inorganic substance contains an oxide crystal including A and M (the A being one or more of P, Ge, and V, and the M being one or more of Nb and Ta), in which the dielectric constant is 500 or more. In the inorganic substance, the oxide crystal is one or more of PNb9O25, P2.5Nb18O50, GeNb9O25, GeNb18O47, GeNb19.144O50, VNb9O25, VNb9O24.9, PTa9O25, GeTa9O25, VTa9O25, and solid solutions thereof.

A solid-state electrolyte material includes doped lithium argyrodite of formula of Li6-2a-bMaTCh5-a-bOaX1+b; where 0<a≤0.5; 0<b≤0.5, M is Zn, Mg, Ca, Sr, Be or a combination of any two or more thereof; T is P, As, Sb, or a combination of any two or more thereof; Ch is S, Se, or a combination thereof; and X is F, Cl, Br, I, or a combination of any two or more thereof.

A flame retardant composition includes 40-60 parts by weight of phosphonate, 5-15 parts by weight of an organosilicon flame retardant, and 2-8 parts by weight of an inorganic silicon synergist. The phosphonate is prepared by a method including: (1) condensing a compound represented by formula (I) such that some of the compounds form a polymer, giving a partially condensed product; and (2) reacting a rare earth inorganic salt with the partially condensed product to form the phosphonate.

The invention belongs to the technical field of electrocatalysis, biomass value-added utilization, polymer recycling and green chemistry, and particularly relates to a novel surface reconstruction CoZn oxygen phosphate electrode and application of the novel surface reconstruction CoZn oxygen phosphate electrode in efficient conversion of polylactic acid hydrolysate into acetic acid. A CoZn precursor oxide is prepared through a coprecipitation method, then the CoZnOP catalyst is obtained through phosphating treatment, the CoZnOP catalyst has a unique stacked three-dimensional nano-structure, the synergistic effect of Co and Zn and surface reconstruction induced by doping of the P element, the high specific surface area and rich active sites are provided, and the CoZnOP catalyst has a good application prospect in preparation of acetic acid through electrocatalytic oxidation of lactic acid. The selectivity, the yield, the energy consumption and the stability of the method are obviously superior to those of the prior art, and the method is an ideal technical scheme for realizing high-value utilization of the polylactic acid hydrolysate.

To provide a flame retardant composition that can effectively improve the flame retardance of a glass fiber-nylon composite material, does not generate a toxic gas during use, and allows smooth raw material feeding during processing, and also to provide a preparation method of the flame retardant composition, a masterbatch, and a glass fiber-nylon composition.SOLUTION: A flame retardant composition comprises 40-60 pts.wt. of phosphonate, 5-15 pts.wt. of an organosilicon flame retardant, and 2-8 pts.wt. of an inorganic silicon synergist, wherein the phosphonate is obtained by a preparation method comprising: condensing a compound represented by a formula (I) such that some of the compounds form a polymer, thereby yielding a partially condensed product; and reacting a rare earth inorganic salt with the partially condensed product to form the phosphonate.SELECTED DRAWING: Figure 1

The invention belongs to the technical field of resource recovery, and particularly relates to a method for preparing a lithium ferric manganese phosphate precursor by recycling a waste phosphate positive electrode material as well as a product and application thereof. The method comprises the following steps: S1, dispersing waste phosphate positive electrode material powder in a phosphoric acid solution for reaction, and filtering after the reaction is finished to obtain filter residue 1 and filtrate 1; s2, adding a metal source into the filtrate 1 for reaction, continuously heating, and filtering after the reaction is finished to obtain filter residues 2 and filtrate 2; and S3, drying the filter cake to obtain the rhodochrosite type ferric manganese phosphate precursor. The method for preparing the ferric manganese phosphate precursor by regenerating the waste phosphate positive electrode material is more environment-friendly, more elements are recycled, and the comprehensive utilization rate of the elements is high.

The present technology relates to inorganic compounds having an argyrodite-type structure based on an alkali metal obtained by a preparation process comprising a step of grinding the sulfide of the alkali metal, the sulfate of the alkali metal, phosphorus pentasulfide and a halide of the alkali metal. Also described are electrode materials, electrodes, electrolytes comprising said inorganic compound having an argyrodite-type structure and their uses in electrochemical cells, for example, in electrochemical accumulators, particularly in all-solid-state batteries.

The present invention discloses a diethylphosphinate aluminum crystal with low content of fine powder, its preparation method, and its use in flame retarding glass fiber reinforced engineering plastics. The present invention uses phosphorus-containing aluminum salt complex as seed crystals to add in the process of preparing diethylphosphinate aluminum crystals, effectively controlling the crystallization process, and obtaining diethylphosphinic acid crystal particles with low content of fine powder, narrow distribution, and large particle size, which can solve the problems of conventional diethylphosphinate aluminum powder such as easy bridging and clogging, and can be applied to the processing process of non-halogen flame retardant glass fiber reinforced engineering plastics. The prepared diethylphosphinate aluminum contains a small amount of phosphorus-containing aluminum salt complex seed crystals, and its flame retardancy is not affected.

The invention discloses a VPO catalyst and application of the VPO catalyst in preparation of maleic anhydride through n-butane oxidation. The method comprises the following steps: dissolving a mineralizer A and a template agent B in water, stirring and mixing, adding alcohol and vanadium in an oxidation state, heating and refluxing, adding phosphoric acid for continuous reaction, then adding a silicon source, washing and drying to obtain a solid, and roasting to remove a template to obtain a precursor; and adding the precursor into small molecular alcohol and water, pressing, demolding, drying, crushing and screening to obtain catalyst particles. According to the process method, the VPO catalyst can be protected, activity reduction caused by abrasion and catalyst coking is reduced, the accessibility of an active center is guaranteed through linear pore channels, stable operation of the catalyst is guaranteed, and therefore the service life of the VPO catalyst is prolonged.

The invention relates to a direct heating type superphosphoric acid production device which comprises a body, the body is in a vertical olive-shaped closed tank shape, and a heating evaporation cavity, a gas-liquid separation cavity and a gas inlet and outlet cavity which are communicated with one another are sequentially formed in the body from bottom to top; the heating evaporation cavity is in an inverted cone shape, and a feeding pipe and a discharging pipe which are through inside and outside are arranged on the side walls of the bottom and the top of the heating evaporation cavity; the gas-liquid separation cavity is cylindrical, and the inner diameter of the gas-liquid separation cavity is the same as that of the upper end of the heating evaporation cavity; an air inlet pipe and an air outlet pipe are arranged on the side wall of the air inlet and outlet cavity; the air inlet pipe is arranged in the axial direction of the body, and the lower end of the air inlet pipe extends into the heating evaporation cavity. The wet-process phosphoric acid can be heated and evaporated to obtain the persulfuric acid, so that the process is shortened, the scaling of equipment is reduced, and the operating rate is increased.

To provide a method for preparing a glass fiber-nylon composition that can effectively improve the flame retardant properties of glass fiber-nylon composites.SOLUTION: The preparation of the composition includes the steps of: (1) condensing and polymerizing a compound represented by formula (I) in the presence of an inorganic acid and acetic anhydride to obtain a partially condensed polymer in which a portion forms a high-molecular-weight polymer; (2) reacting the partially condensed polymer with a rare earth inorganic salt to obtain a phosphonate; (3) mixing the phosphonate, an organic silicone flame retardant, and an inorganic silicone synergist to obtain a flame-retardant composition; (4) melt-extruding a raw material containing a first nylon, the flame-retardant composition, a lubricant, and an antioxidant in an extruder to obtain a flame-retardant masterbatch; and (5) melt-extruding a raw material containing a second nylon, glass fibers, the flame-retardant masterbatch, and additives in an extruder to obtain a composition.SELECTED DRAWING: Figure 1

The present technology relates to inorganic compounds having an argyrodite-type structure based on alkali metals, which are obtained by a preparation method comprising a step of grinding an alkali metal sulfide, an alkali metal sulfate, phosphorus pentasulfide, and an alkali metal halide. Also described are electrode materials, electrodes, electrolytes, and their use in electrochemical cells, such as electrochemical accumulators, in particular all-solid-state batteries, which comprise said inorganic compounds having an argyrodite-type structure.

The application discloses a mine acid wastewater high-value utilization method, which comprises the steps of concentration, reduction reaction, zinc removal through sulfuration, aluminum removal through neutralization, oxidation, calcium and magnesium removal, oxidation synthesis, aging and washing and the like. The application realizes rapid and efficient utilization of valuable resources such as acid iron, copper and zinc in mine acid wastewater, realizes waste-to-resource, and uses iron in the mine acid wastewater as an iron source for preparing phosphoric iron, thereby effectively solving the mine acid wastewater treatment problem, solving the source and cost bottleneck problem of the iron source for preparing phosphoric iron, and having remarkable economic, social and environmental protection benefits.

The invention relates to a process method for large-scale preparation of calcium-deficient hydroxyapatite and a product thereof. The preparation method comprises the following steps: fully mixing calcium hydrophosphate and calcium carbonate powder in a molar ratio of 2: 1, adding polyvinyl alcohol, and calcining and cooling the mixed powder at high temperature by adopting a solid-phase reaction method to obtain non-agglomerated alpha-TCP powder; crushing and sieving the powder; and preparing a phosphate solution with the pH value of 9-10, adding the powder into the solution in the stirring process, continuously stirring after the powder is added, standing, and carrying out filter pressing, drying and crushing on the product to obtain the calcium-deficient hydroxyapatite. According to the method, raw materials including calcium hydrophosphate and calcium carbonate are calcined at high temperature by a solid-phase reaction method, polyvinyl alcohol is added to avoid large-scale agglomeration of alpha-TCP after sintering, crystalline alpha-TCP is prepared after quenching, then the crystalline alpha-TCP is subjected to phase transformation in weak alkali liquid to form calcium-deficient hydroxyapatite, and the product conversion rate is high.

A catalyst has a carrier and a hydrogenation active metal component supported on the carrier. The hydrogenation active metal component contains at least one Group VIB metal component and at least one Group VIII metal component, and the carrier is composed of phosphorus-containing alumina. When the hydrogenation catalyst is measured using a hydrogen temperature programmed reduction method (H2-TPR), the ratio of the peak height of the low-temperature reduction peak, Plow-temp peak, at a temperature of 300-500° C. to the peak height of the high-temperature reduction peak, Phi-temp peak, at a temperature of 650-850° C., i.e. S=Plow-temp peak / Phi-temp peak, is 0.5-2.0; preferably 0.7-1.9, and more preferably 0.8-1.8. The hydrogenation catalyst shows excellent heteroatom removal effect and excellent stability when used in hydrotreatment.

The application discloses a VPO catalyst and application thereof in oxidation of n-butane to prepare dicanhydride. The method comprises the following steps: dissolving a mineralizer A and a template B in water, stirring and mixing, adding alcohol and vanadium in an oxidized state, heating and refluxing, adding phosphoric acid to continue the reaction, adding a silicon source, washing and drying the obtained solid, and calcining to remove the template to obtain a precursor; adding the precursor into small-molecule alcohol and water, and obtaining catalyst particles through pressing, demolding, drying, crushing and screening. The process method adopted by the application can realize protection of the VPO catalyst, reduce abrasion and activity reduction caused by catalyst coking, ensure accessibility of active centers through linear pores, ensure stable operation of the catalyst, and prolong the service life of the VPO catalyst.