27 results about "Metaphosphoric acid" patented technology

The invention belongs to the technical field of preparation processes of barium metaphosphate, and particularly relates to a preparation method of monodisperse micron-sized barium metaphosphate. The preparation method comprises the following steps: mixing purified barium carbonate slurry and phosphoric acid according to a certain molar ratio, reacting to obtain barium dihydrogen phosphate slurry, adding ethanol and a particle size regulating agent, uniformly mixing, and carrying out spray drying to obtain a crude product; the particle size regulating agent comprises ammonium citrate, polyalcohol and barium metaphosphate; and calcining the crude product to obtain the product monodisperse micron-sized barium metaphosphate. According to the preparation method, a small amount of particle size regulating agent and a certain amount of ethanol are added, a crude product with uniform particle size distribution is prepared under a spray drying process condition, and then calcination is performed to obtain the micron-sized barium metaphosphate with uniform particle size distribution.

The application discloses a kind of high flame-retardant tpe materials and preparation method thereof, by polytetrahydrofuran, modified monomer and 4,4'-dicyclohexyl methane diisocyanate are reacted, chain extension is used with 1,4-butanediol, finally join flame-retardant additive, form branched structure, and the molecular structure of the pte material is branched structure, and molecular chain segment contains organic silicon composite organic phosphorus structure, when heat decomposition, can generate phosphoric acid, poly-metaphosphoric acid and other acidic substances, these acidic substances will catalyze pte molecule to occur dehydration reaction, accelerate its crosslinking, organic silicon chain segment will produce inorganic silicate or silicon-carbon, and then form a dense carbon layer on the surface of material, can heat insulation and oxygen isolation, prevent combustible gas to escape outward and oxygen diffusion inward, and slow down the further thermal decomposition of internal material, prevent carbon layer from being burnt through or collapse under high temperature, improve the durability of barrier, so that pte material has good flame-retardant effect.

This invention relates to the field of polymer materials technology, specifically disclosing a flame-retardant thermoplastic elastomer compound and its preparation method. The flame-retardant thermoplastic elastomer compound comprises 50-80 parts SEBS, 10-30 parts PP, 5-15 parts compatibilizer, 10-30 parts composite flame retardant, 3-10 parts plasticizer, 0.2-1 parts antioxidant, and 0.1-0.5 parts lubricant. The composite flame retardant is prepared by reacting and mixing an intumescent flame retardant, barium metaphosphate, boron nitride, triallyl isocyanurate, and SEBS. The flame-retardant thermoplastic elastomer compound of this application possesses good flame retardancy, mechanical properties, and water resistance stability.

The present application relates to the technical field of lithium ion battery recycling, in particular to a method for stripping lithium ion battery pole piece and application thereof. The method for stripping lithium ion battery pole piece comprises: immersing the pole piece into a mixed solution containing a stripping agent and a stripping aid for reaction, and obtaining the separated active material layer and the current collector layer after a period of time; the stripping agent comprises a carboxylic acid containing at least two carboxyl groups; the stripping aid comprises at least one of sodium fluoride, potassium fluoride, ammonium fluoride, phosphoric acid, sodium phosphate, monosodium phosphate, sodium metaphosphate, potassium phosphate, monopotassium phosphate, potassium metaphosphate, ammonium phosphate, disodium ethylenediaminetetraacetate, tetrasodium ethylenediaminetetraacetate, inositol hexaphosphate and its salt, inositol pentaphosphate and its salt, inositol tetraphosphate and its salt, and inositol triphosphate and its salt. The method can realize the separation of the active material and the current collector, the hydrogen production amount is small during the whole stripping process, the current collector obtained after stripping is intact, the separation time is short, and the separation efficiency is high.

The invention relates to a part made from synthetic graphite, preferably isostatic synthetic graphite, impregnated with aluminium metaphosphate Al(PO3)3, and characterised in that the aluminium metaphosphate content is at least 1% by weight for the cubic form and does not exceed 0.4% by weight, and preferably does not exceed 0.3% by weight, for monoclinic forms. Such a part has good resistance to oxidation and can be used under hydrothermal conditions.

The present application relates to a kind of high hardness polyurethane and its preparation method and application.The phosphorus-containing polyol structural formula is as follows: the phosphorus-containing polyol is prepared by ester exchange reaction using phosphorus-containing diol and dialkyl carbonate.High hardness flame-retardant thermoplastic polyurethane elastomer is prepared from the phosphorus-containing polyol.The phosphorus-containing polyol can decompose phosphoric acid, metaphosphoric acid and other substances during heating, promote the dehydration and carbonization of polyurethane, and form a dense carbon layer that is not easy to burn, thereby achieving excellent flame-retardant effect.

This invention relates to the field of health food testing technology, and particularly to a method and system for rapid determination of ascorbic acid enantiomer content in health foods using ultra-high performance phase chromatography (UHPLC). After extraction with metaphosphoric acid solution via ultrasonication in the dark, centrifugation, and filtration, the sample is separated using a Waters Acquity BEH column. Gradient elution is performed using supercritical carbon dioxide and 0.1% phosphoric acid methanol solution as the mobile phase, under conditions of 13.8 MPa system back pressure, 31 °C column temperature, and 245 nm detection wavelength. The contents of D(−)-ascorbic acid and L(+)-ascorbic acid are determined using the external standard method. This invention can achieve effective separation of the two ascorbic acid enantiomers in a short time, and has advantages such as fast analysis speed, good separation effect, high accuracy, good repeatability, and low organic solvent consumption. It is suitable for quality control and regulatory detection of ascorbic acid enantiomers in various health foods such as tablets, capsules, and liquids.

The invention relates to a sealing solution and a preparation method and application thereof, and relates to the technical field of anodic oxidation. The invention provides a preparation method of a sealing solution, which comprises the following steps: (1) mixing a fluotitanic acid solution, a zirconium fluoride solution, a glycerol solution, a sodium metaphosphate solution and water to obtain a stock solution; and (2) adding pure water into the stock solution, and uniformly stirring to obtain a closed solution. When the prepared sealing solution is used for preparing a part oxide layer, a surface film layer with ultrahigh sealing performance and excellent corrosion resistance can be obtained, the vacuum leak rate of the surface film layer is as low as 10-12 Pa.L / s, the corrosion-resistant hydrochloric acid Bubble test exceeds 4 h, and the requirements for ultrahigh sealing performance and excellent corrosion resistance are met.

The invention discloses a preparation method of a caprolactam ammoniation catalyst, the caprolactam ammoniation catalyst and application, and belongs to the field of catalysis. Comprising the following steps: S1, mixing a carrier with an alkali solution, treating I, drying I and roasting to obtain a treated carrier; s2, mixing an active component precursor solution with the treated carrier, dipping, and drying II to obtain a catalyst precursor; and S3, treating the catalyst precursor II in a water vapor atmosphere to prepare the caprolactam ammoniation catalyst, the active component precursor is selected from at least one of phosphoric acid, metaphosphoric acid, ammonium dihydrogen phosphate, diammonium hydrogen phosphate, polyphosphoric acid, phosphomolybdic acid and phosphotungstic acid. The prepared catalyst is applied to a reaction for preparing 6-aminocapronitrile through caprolactam ammonification, has high conversion rate and selectivity, also has high stability, and can stably operate for a long period.

The invention relates to the technical field of battery materials, and discloses a lanthanum metaphosphate coated lithium cobalt oxide composite material and a preparation method thereof. The preparation method comprises the following steps: taking trivalent metal lanthanum salt and phosphate as raw materials, obtaining high-purity lanthanum metaphosphate through a solid phase method, then dispersing the lanthanum metaphosphate into a solvent, adding lithium cobalt oxide, and carrying out wet coating, so as to obtain the lithium cobalt oxide material coated with a lanthanum metaphosphate shell. The lanthanum metaphosphate coated lithium cobalt oxide composite material provided by the invention has excellent conductivity, rate capability and cycle performance.

The invention relates to the technical field of sodium-ion battery positive electrode materials, and discloses a sodium-ion battery positive electrode material and a preparation method thereof, a sodium-ion battery and electric equipment. The sodium-ion battery positive electrode material comprises a substrate and a coating layer coating at least part of the surface of the substrate, the chemical formula of the substrate is NaxNiaFebMncMdO2, x is greater than or equal to 0.85 and less than or equal to 1.1, a is greater than 0 and less than 1, b is greater than 0 and less than 1, c is greater than 0 and less than 1, d is greater than 0 and less than 0.5, a + b + c + d = 1, and M is selected from at least two of Ti, Mg, Cu, Ca, Al, Zn, La, Cr, Y, Ce, Si, Sn and W; the coating layer comprises metaphosphoric acid metal salt, and metal elements in the metaphosphoric acid metal salt are selected from at least one of Y, La, Al, Li, Na, Ba and Ca. The battery positive electrode material provided by the invention is applied to the sodium-ion battery, so that the sodium-ion battery has good cycling stability and excellent specific capacity.

This invention provides a multi-component system, particularly a two-component mortar system, that overcomes the shortcomings of conventional systems. [Solution] The above problems are solved by a two-component mortar system for chemical fixation of fasteners in a mineral substrate, comprising a curing aqueous phase alumina cement component A and an initiator component B in the aqueous phase for initiating a curing process, wherein component A further comprises at least one blocking agent selected from the group consisting of boric acid, phosphoric acid, metaphosphoric acid, phosphorous acid, and phosphonic acid, and water, and component B comprises blocked blast furnace granulated slag, water, and optionally at least one mineral filler, and a ready-to-use two-component system for chemical fixation of fasteners in a mineral substrate such as brickwork, concrete, permeable concrete, or natural stone structures, preferably metallic elements, and its use for chemical fixation of fasteners.

The present application relates to the field of biological products and veterinary medicine, and discloses a method for extracting and purifying blood gonadotropin, which comprises the following steps: 1) adjusting the pH of pregnant mare serum to 4.5-5.0 by using metaphosphoric acid, and performing solid-liquid separation to collect supernatant; 2) precipitating the supernatant by using a first precipitant, and collecting filtrate; 3) precipitating the filtrate by using a second precipitant, collecting precipitate, and drying the precipitate to obtain crude blood gonadotropin; 4) dissolving the crude blood gonadotropin, and sequentially performing first ultrafiltration, affinity chromatography, second ultrafiltration, and cation exchange chromatography to obtain crude blood gonadotropin filtrate; precipitating the crude blood gonadotropin filtrate by using a third precipitant, collecting precipitate, and drying the precipitate to obtain pure blood gonadotropin. The purity of the blood gonadotropin prepared by the extraction and purification method can reach more than 99.9%, the total yield can reach 88.9%, and the titer can reach 11000 IU / mg.

The invention discloses a soldering flux for welding a lead-acid storage battery, which is characterized by comprising the following components in percentage by weight: 20-25% of a deoxidant, 10-20% of an activator, 2-5% of a surfactant, 1-2% of a corrosion inhibitor, 2-3% of an additive and the balance of a solvent, the deoxidant is any one of phosphoric acid, phosphorous acid and metaphosphoric acid; the activating agent is any one of oxalic acid, succinic acid, glutaric acid, citric acid, malic acid and tartaric acid; the surfactant is any one of polyoxyethylene ether, sodium dodecyl benzene sulfonate, alkyl betaine and perfluoroalkyl sulfonate; the corrosion inhibitor is any one of triethanolamine, octadecylamine, hexadecyl trimethyl ammonium bromide, benzimidazole and benzotriazole; the additive is ethyl acetate and s-triazine in a ratio of 4: 3; the solvent is any one of ethylene glycol, propylene glycol ether, propylene glycol, glycerol and 1, 4-butanediol. The method aims to solve the problem of halogen element residues in the cast welding process of the lead-acid storage battery.

The invention discloses a high flame-retardant tpe material and a preparation method thereof.The preparation method comprises the steps that polytetrahydrofuran, a modified monomer and 4, 4 '-dicyclohexylmethane diisocyanate react, then 1, 4-butanediol is used for chain extension, finally, a flame-retardant additive is added, a branched structure is formed, the tpe material is prepared, the molecular structure of the pte material is the branched structure, and the flame-retardant property of the pte material is improved. A molecular chain segment contains an organic silicon composite organophosphorus structure, acidic substances such as phosphoric acid and polymetaphosphoric acid can be generated when the organic silicon composite organophosphorus structure is heated and decomposed, the acidic substances can catalyze pte molecules to be subjected to a dehydration reaction and accelerate crosslinking of the pte molecules, and the organic silicon chain segment can generate inorganic silicate or silicon-carbon, so that a compact carbon layer is formed on the surface of the material; the flame-retardant PP material has the advantages that heat and oxygen can be insulated, combustible gas is prevented from escaping outwards, oxygen is prevented from diffusing inwards, further thermal decomposition of internal materials is slowed down, a carbon layer is prevented from being burnt through or collapsed at a high temperature, the durability of a barrier is improved, and the PP material has a good flame-retardant effect.

This invention relates to the field of mineral-based solid waste resource recycling, specifically to a solid waste-based homogeneous slurry and its preparation method. Using mineral-based solid waste as the core raw material, supplemented with water, grinding aids, and potential regulators, a stable solid waste-based homogeneous slurry is prepared through a complete process including raw material pretreatment, coarse grinding, fine grinding, graded closed-loop screening, precise Zeta potential control, and ultrasonic homogenization. This slurry can be used with composite solidifying agents to prepare solidified soil for engineering applications. This invention establishes a precise matching mechanism between the calcium content of solid waste and the potential regulator. Potassium hexapolymetaphosphate is preferred for high-calcium mineral-based solid waste, while sodium pyrophosphate is preferred for low-calcium mineral-based solid waste. It is suitable for all types of high-calcium and low-calcium bulk mineral-based solid waste. The prepared slurry exhibits excellent homogeneity and can be stored for a long time. The solidified products have high mechanical strength and low performance dispersion. The preparation process parameters are controllable and suitable for large-scale continuous production, showing broad application prospects.

A synthetic graphite part, preferably isostatic, impregnated with aluminum metaphosphate Al(PO3)3, and characterized in that the aluminum metaphosphate content is at least 1 wt% for the cubic form and does not exceed 0.4 wt%, and preferably does not exceed 0.3 wt%, for the monoclinic forms. Such a part has good resistance to oxidation and can be used under hydrothermal conditions.

The invention relates to the technical field of metaphosphate preparation, in particular to a preparation method of monodisperse micron-sized magnesium metaphosphate, which comprises the following steps: (S1) adding basic magnesium carbonate into a reaction container, adding water to prepare slurry I, slowly adding phosphoric acid, heating to 30-40 DEG C, continuously and slowly adding phosphoric acid, heating to 50-60 DEG C, concentrating, dehydrating, washing and drying to obtain a solid; (S2) preparing slurry II from the solid and deionized water, adding ethanol and a particle size regulating agent, uniformly mixing, and performing centrifugal spray drying to obtain a crude product; the particle size regulating agent is prepared from magnesium stearate, polyol, polyvinyl alcohol and nanoscale magnesium metaphosphate; and (S3) calcining the crude product to obtain a monodisperse micron-sized magnesium metaphosphate product. According to the preparation method disclosed by the invention, a crude product with uniform particle size can be obtained by spray drying, adding ethanol and a particle size regulating agent and reasonably controlling a formula and spray drying parameters, and finally, the crude product is calcined to obtain the monodisperse micron-sized magnesium metaphosphate.

Disclosed in the present invention is a passivation treatment liquid for a tinplate, which passivation treatment liquid comprises: chromic anhydride, which has a content of 15-30 g / L; metaphosphoric acid and / or a metaphosphate, which has a content of 5-15 g / L; ammonium bromide, which has a content of 1-5 g / L; and a nitrogen-containing organic compound, which has a content of 0.2-2 g / L. Further disclosed in the present invention are a tinplate treated with the passivation treatment liquid and a method for manufacturing the tinplate. The surface of the tinplate has good coating wettability and better paint film adhesion.

A method for preventing corrosion of a metal member in which cooling water and steam are alternately brought into contact with each other, said method being characterized in that a phosphorus compound and / or a zinc compound are added to the cooling water, and an anti-corrosion film-forming substance is added to the steam. The phosphorus compound is at least one of hexametaphosphoric acid, triphosphoric acid, orthophosphoric acid, phosphono butane tricarboxylic acid, HEDP (1-hydroxyethylidene-1, 1-diphosphonic acid) and amino trimethylphosphonic acid.

The nonaqueous electrolyte of the present disclosure has a nonaqueous solvent, particles of a phosphorus-containing compound that is insoluble in the nonaqueous solvent, and a polymer that is dissolved in the nonaqueous solvent. The polymer can include a borate structure in a repeating unit. The phosphorus-containing compound can include at least one selected from the group consisting of Li3PO4, Na3PO4, LiPO3, LiPO3F, metaphosphoric acid, and P2O5.

The invention discloses a reactive flame-retardant polyurethane pouring sealant and a preparation method thereof. The flame-retardant polyurethane pouring sealant is mainly formed by reacting a reactive polyhydroxy phosphate (phosphonate) flame retardant with isocyanate or an isocyanate-containing prepolymer, the reaction type polyhydroxy phosphate (phosphonate) flame retardant is formed by reacting any one of polyphosphoric acid, phosphoric acid, metaphosphoric acid, hypophosphorous acid, phosphorous acid, pyrophosphoric acid and phenylphosphonic acid with an epoxy compound. A series of reaction type flame-retardant polyurethane pouring sealants are prepared, and the problems that an existing polyurethane pouring sealant is low in flame retardant property, and the mechanical property is influenced when a flame retardant is added for modification can be effectively solved.

A two-component mortar system for chemical fixation of fasteners in mineral substrates, comprising curing aqueous phase alumina cement component A and an initiator component B in the aqueous phase for initiating the curing process; further, a ready-to-use two-component system for chemical fixation of fasteners in mineral substrates such as brickwork, concrete, permeable concrete, or structures made of natural stone, preferably metal elements; and its use for chemical fixation of fasteners. [Solution] Component A further comprises at least one blocking agent selected from the group consisting of boric acid, phosphoric acid, metaphosphoric acid, phosphorous acid, and phosphonic acid, and water, and component B comprises blocked calcium silicate cement and water.

This invention discloses a low-sodium compound phosphate for moisture retention in meat products and its preparation method. The low-sodium compound phosphate comprises the following components by weight: 52-68 parts potassium pyrophosphate; 18-28 parts sodium tripolyphosphate; 6-18 parts potassium metaphosphate; and 4-12 parts coating component. The coating component includes trehalose, potassium gluconate, and maltodextrin, with trehalose accounting for 35%-60%, potassium gluconate for 8%-22%, and maltodextrin for 25%-50%. The low-sodium compound phosphate adopts a core-shell composite particle structure, with the core layer comprising potassium pyrophosphate, sodium tripolyphosphate, and potassium metaphosphate, and the shell layer comprising the coating component. The sodium content in the low-sodium compound phosphate, calculated as sodium oxide, is 4.0%-8.5%. This invention can significantly reduce the sodium content, effectively mask the bitter flavor of potassium salts through microstructural design, and simultaneously possesses excellent moisture-proof and anti-caking properties and a synergistic effect of high water retention.

The application discloses a preparation method and application of an organic acid modified aluminum metaphosphate supported nickel-palladium catalyst. A carrier Al(PO3)3, 4-trifluoromethyl salicylic acid (TFMSA), a nickel source and a palladium source are added into acetone, a suspension obtained by stirring at room temperature is dried in a vacuum drying box after removing the solvent acetone by rotary evaporation, and the obtained solid is ground into a solid powder by using a mortar. The solid powder is calcined in a tube furnace under an inert atmosphere and at a specified temperature, and is reduced under H2 atmosphere and at a specified temperature to obtain a black solid powder, which is the organic acid modified aluminum metaphosphate supported nickel-palladium catalyst and is recorded as NiPd-TFMSA / Al(PO3)3. The application also discloses an application of the organic acid modified aluminum metaphosphate supported nickel-palladium catalyst in catalytic hydrogenolysis of lignite and model compounds thereof.

The invention provides a sterilization and disinfection liquid composition which comprises sodium silicate, sodium benzoate, sodium acetate, sodium persulfate, sodium chloride and sodium metaphosphate, the composition is simple in raw material composition and low in cost, and the obtained composition is extremely high in stability, not easy to decompose, easy to store and transport and extremely high in economic value.

This invention discloses a method for preparing and applying a phosphate-coated nickel-iron-based catalyst for seawater electrolysis to produce hydrogen, belonging to the field of nanocatalysis and clean energy conversion. The invention uses nickel foam as a substrate, immersing it in a nickel-iron mixed solution at room temperature to grow a layered nickel-iron double hydroxide in situ on the support surface. After cleaning and drying, it is sequentially activated using potassium hydroxide and sodium hexametaphosphate solutions, combined with cyclic voltammetric electrochemical activation, to obtain a phosphate-coated nickel-iron-based catalyst. This catalyst is used as the anode in a flowing electrolyzer, paired with a nickel phosphide cathode, to complete the electrocatalytic hydrogen production reaction using alkaline seawater as the electrolyte. This preparation process is mild, simple to operate, uses inexpensive and readily available raw materials, is environmentally friendly, requires no complex equipment, and is suitable for large-scale production. The modified catalyst, in synergy with the flowing electrolyzer system, can efficiently achieve alkaline seawater electrolysis, showing broad application prospects in green hydrogen production and clean energy conversion, and providing technical support for achieving dual-carbon goals.