297 results about "Phosphorus pentoxide" patented technology

The present invention belongs to the technical field of glass preparation, and specifically relates to an ultra-white glass and a preparation method thereof. The ultra-white glass of the present invention is composed of the following raw materials by weight: 110 parts of quartz sand, 18-20 parts of sodium carbonate, 14-16 parts of colemanite, 4.5-5.5 parts of magnesia, 2.6-2.8 parts of calcined alumina, 1.1-1.3 parts of potassium oxide, 0.8-1.0 parts of zinc oxide, 1.5-1.7 parts of phosphorus pentoxide, 0.15-0.20 parts of strontium chloride, 0.3-0.34 parts of calcium fluoride, 0.25-0.27 parts of barium nitrate, and 0.16-0.18 parts of zirconium oxide. The ultra-white glass of the present invention has a synergistic effect between the raw materials to ensure that the prepared ultra-white glass has excellent whiteness and visible light transmittance.

The invention discloses a hyperbranched water reducing agent for high-tensile wet joint UHPC (Ultra High Performance Concrete) as well as a preparation method and application of the hyperbranched water reducing agent, and belongs to the technical field of concrete admixtures. The preparation method comprises the following steps: mixing pentaerythritol and maleic anhydride, adding a catalyst p-toluenesulfonic acid, and carrying out an esterification reaction to prepare an esterification product; carrying out amidation reaction on the esterification product, diethanol amine and a catalyst sodium ethoxide to obtain a prepolymer; acrylic acid, maleic anhydride and the prepolymer are dissolved in deionized water, an initiator ammonium persulfate is added for a free radical copolymerization reaction, and a main chain polymer is obtained; carrying out phosphorylation reaction on the main chain polymer and phosphorus pentoxide to obtain a phosphorylated main chain polymer; the phosphorylated main chain polymer, methoxypolyethylene glycol and a catalyst p-toluenesulfonic acid are subjected to an etherification reaction, a hyperbranched comb-shaped polymer water reducing agent solution is obtained and then subjected to aftertreatment, and the water reducing agent is prepared. According to the hyperbranched comb-shaped polymer water reducing agent prepared by the preparation method disclosed by the invention, the problems of poor flowability and high viscosity of ultra-high performance concrete (UHPC) are solved by combining a linear side chain of a comb-shaped structure and a three-dimensional branch of hyperbranched topology.

The invention discloses a comb-type polyphosphate polymeric dispersant and a preparation method thereof, the dispersant is prepared by preparing a phosphate monomer from acrylate and phosphorus pentoxide, then copolymerizing the phosphate monomer with phenyl alkene or alkyl alkene, and finally adding alkali liquor for neutralization. A phosphate-polyether bifunctional side chain is introduced to a main chain, a phosphate group provides electrostatic repulsion, and a polyether group enhances steric hindrance, so that the dispersing agent can meet the requirements of strong adsorption and long-range stability at the same time, and a more durable and effective stabilizing effect is provided for a dispersion system.

The invention relates to the technical field of phase change materials, in particular to an intrinsic flame-retardant solid-solid phase change material and a preparation method and application thereof. The invention provides an intrinsic flame-retardant solid-solid phase change material which is prepared from the following raw materials in parts by mass: 65-75 parts of polyethylene glycol, 7-17 parts of epoxy resin and 18-33 parts of a flame retardant, the flame retardant is prepared from phosphorus pentoxide, expanded graphite and melamine; the epoxy resin comprises epoxy resin glue and an epoxy curing agent. The intrinsic flame-retardant solid-solid phase change material can solve the technical problems that a phase change material is easy to leak and easy to burn.

The invention provides a thermal response self-ceramization fireproof coating and a preparation method thereof. The thermal response self-ceramization fireproof coating is prepared from the following raw materials in parts by mass: 3 to 10 parts of acrylic monomer, 3 to 10 parts of organic sulfonate, 1 to 4 parts of silane coupling agent, 0.5 to 3 parts of silicate ester, 4 to 6 parts of ceramic precursor, 3 to 6 parts of fluxing agent and 0.05 to 0.4 part of initiator. The fluxing agent comprises a component A and a component B, the component A is one of boric oxide, zinc borate or low-melting-point glass powder, and the component B is one of phosphorus pentoxide and ammonium polyphosphate. The silane coupling agent can be copolymerized with an acrylic monomer to construct a C-C main chain, the C-C main chain and silicate ester are subjected to hydrolytic condensation to form a Si-O-Si three-dimensional network, a chemical cross-linked skeleton is formed, and the chemical cross-linked skeleton can generate silicon dioxide at high temperature to participate in a ceramization reaction; the ceramic precursor and silicate ester can form a strong physical cross-linking effect, so that the fireproof coating with a chemical and physical double-cross-linked network can be formed, and the fireproof coating has excellent mechanical property and machinability at normal temperature.

The invention discloses an ardealite-based slow release fertilizer and a preparation method thereof, the ardealite-based slow release fertilizer comprises: a core layer, the core layer comprises ardealite and a complex microbial inoculant; in the phosphogypsum, the content of fluoride is less than or equal to 0.1 wt%, and the content of phosphorus pentoxide is more than or equal to 0.1 wt%; the complex microbial inoculants comprise phosphorophilic bacteria; and the material of the coating layer comprises a scene response material. Therefore, according to the ardealite-based slow release fertilizer, the utilization rate of ardealite can be effectively increased, and meanwhile, the slow release performance of the slow release fertilizer is further optimized.

The invention relates to the technical field of chemical preparation, in particular to a preparation method of phosphorus trifluoride, which comprises the following steps: step 1, preparing reactants: preparing phosphorus pentoxide and pure fluorine gas; 2, mixing reactants: in a proper reaction container, mixing phosphorus pentoxide with pure fluorine gas; step 3, controlling the reaction conditions of reactants: ensuring that the reaction is carried out at proper temperature and pressure so as to promote the smooth proceeding of the reaction; and 4, separating the product to obtain phosphorus trifluoride. The method comprises the following steps: putting phosphorus pentoxide into a dry container, preparing a storage tank filled with fluorine gas, putting the prepared phosphorus pentoxide into a reaction container, introducing the dry fluorine gas from the storage tank, carrying out a reaction at high temperature and high pressure, and after the reaction is completed, adding the fluorine gas into the reaction container, phosphorus trifluoride and a byproduct oxyfluoride are separated through a physical method (distillation or condensation), so that the process is simple, and the reaction conversion rate is high.

The invention provides a preparation method and application of a catalyst for selective production of ethanethiol. The catalyst comprises an active component, an auxiliary agent and a molded alumina carrier, the active component comprises the following components in percentage by mass: 5-10% of VIII group transition metal oxide and 15-20% of VIB group metal oxide, and the auxiliaries comprise 0.5-4% of alkali metal, 1-3% of alkaline earth metal oxide, 0.6-2% of cerium oxide and 1-4% of phosphorus pentoxide. A bifunctional catalyst with moderate Lewis acid-base sites is constructed by compounding a multi-component aid and an active component, and the catalyst shows excellent catalytic activity that the ethylene conversion per pass is greater than or equal to 98%, the ethanethiol selectivity is about-95% and the ethanethiol yield is-90% under the reaction conditions that the hydrogen sulfide / ethylene feeding mass ratio is 3-5, the temperature is 180-210 DEG C, the pressure is 0.5-1.0 MPa and the volume space velocity is 200-300 h <-1 >. And the catalyst can stably run for 1250 hours or more.

The invention relates to a process for preparing a phosphor copper rod by using a phosphonate-amide composite purifying agent as a quenching aid, and belongs to the technical field of non-ferrous metallurgy. Phosphorus pentoxide and sodium carbonate are mixed and decocted into fused salt, the fused salt is cooled and ground and then added into a corundum crucible together with scrap copper to be rapidly heated, compressed air is blown in, and slagging-off is conducted after heat preservation and standing; blowing mixed gas into the melt for reduction refining; adding calcium boride into the melt for refining; the refined copper liquid is subjected to continuous casting and continuous rolling; rapidly immersing the phosphorus copper rod subjected to continuous casting and rolling into a quenching aid solution, and carrying out quenching treatment; and the quenched phosphor copper rod is blow-dried and dried, and the high-conductivity phosphor copper rod is obtained. The high-purity phosphorus copper rod prepared by the method is excellent in key indexes of copper content, phosphorus content and conductivity, and meets the expected requirements of high purity and high conductivity.

The invention discloses a toughened glass ceramic and a preparation method thereof, and relates to the technical field of glass ceramics, and the toughened glass ceramic comprises the following components in percentage by weight: 64 to 68 weight percent of silicon dioxide, 22.67 to 26.5 weight percent of lithium oxide, 0.9 to 1.2 weight percent of antibacterial agent, 0.8 to 1.1 weight percent of modified mica powder, 1.98 to 2 weight percent of aluminum oxide, 1.78 to 1.8 weight percent of potassium oxide, 1.68 to 1.7 weight percent of zirconium dioxide, 1.19 to 1.2 weight percent of phosphorus pentoxide and 1 to 3 weight percent of calcium fluoride. According to the toughened glass ceramic and the preparation method thereof, a multi-scale anti-cracking network is formed through macroscopic crack deflection of mica and nanoscale phase change toughening of zirconium oxide, the fracture toughness is remarkably improved, zirconium oxide agglomeration can be reduced through interface optimization of modified mica powder, zirconium oxide is dispersed more uniformly, and the phase change potential is further exerted; due to high-temperature stability of aluminum oxide, antibacterial agent particles can be wrapped, and excessive volatilization or aggregation of the antibacterial agent particles in the sintering process is prevented; aluminum oxide is used as a'protective shell 'to delay the Cu < 2 + > release rate and realize long-acting antibiosis.

The preparation method comprises the following steps: taking para aminobenzoic acid, 3, 3-diaminobiphenyl and phosphorus pentoxide as raw materials, and carrying out high-temperature dehydration cyclization reaction in a polyphosphoric acid solvent to obtain a diamine monomer containing biimidazole; the preparation method comprises the following steps: adding a bis-imidazole-containing diamine monomer, 2-(4-aminophenyl)-5-aminobenzoxazole and an organic solvent into a reactor, stirring and dissolving, after the solution is clarified, adding pyromellitic dianhydride, stirring and reacting, and after the reaction is completed, obtaining a polyamide acid membrane casting solution; and carrying out film casting on the polyamide acid film casting solution, drying at low temperature, and transferring to a muffle furnace to carry out imidization reaction after solvent volatilization is finished, so as to obtain the bis-imidazole polyimide film. The biimidazole polyimide film constructed by the invention is applied to a flexible OLED substrate, and has relatively good thermal performance and mechanical performance.

The invention discloses a flexible temperature-resistant PBO polymer and a preparation process thereof.The preparation process comprises the steps that polyphosphoric acid is heated and then fed into a degassing kettle, 4, 6-diamino resorcinol hydrochloride, aromatic dicarboxylic acid and phosphorus pentoxide are added into the degassing kettle, degassing is conducted in the degassing kettle, prepolymerization and defoaming are conducted after degassing is completed, and a prepolymer material is obtained; the preparation method comprises the following steps: preparing a pre-polymer material, pressing the pre-polymer material into a screw extruder through a hydraulic machine, carrying out post-polymerization reaction on the pre-polymer material in the screw extruder, filtering through a filter, defoaming to obtain a post-polymer material, extruding the post-polymer material from a mold, and washing with water to obtain the flexible temperature-resistant PBO polymer. The PBO polymer prepared by the invention has temperature resistance similar to that of para-position PBO, but has lower requirements on preparation conditions, higher solubility in a polyphosphoric acid system and better processability of a polymerization stock solution, and the PBO polymer has the potential of being used for preparing low-cost ultrahigh-temperature-resistant paper or clothing fibers.

The invention relates to the field of preparation of water-soluble fertilizers, in particular to an organic microelement water-soluble fertilizer and a preparation method thereof. The method comprises the following steps: fermenting wine brewing vinasse to obtain vinasse fermentation liquor; evaporating and concentrating the vinasse fermentation liquor to obtain concentrated liquor; the concentrated solution is added into a reaction kettle to be stirred, nitrogen, phosphorus pentoxide, potassium oxide and a suspending agent are sequentially added in the stirring process to obtain a mixed solution, and the stirring time is 2 hours; grinding the mixed solution by using a shear type colloid mill to obtain a liquid fertilizer; and conveying the liquid fertilizer to a filling line for filling to obtain the finished water-soluble fertilizer. Further, the collected solution state image can be subjected to image analysis by using a computer vision technology based on deep learning, and whether each component in the mixed solution is uniformly distributed or not is judged based on color distribution characteristics and texture distribution characteristics of the solution state, so that the automatic and intelligent control of the grinding process is realized.

The invention provides a phosphate ester water-based polymer as well as a preparation method and application thereof. The phosphate ester water-based polymer is prepared by polymerizing the following monomers: monovinyl ether, a vinyl benzene monomer, allyl polyoxyethylene methyl terminated polyether and phosphorus pentoxide. The phosphate water-based polymer can be used for dispersing water-based nano titanium dioxide and can be used for preparing titanium dioxide dispersion liquid with low particle size, narrow distribution and good stability.

The invention relates to the technical field of modified carbon graphite materials, and particularly discloses an antioxidant modified carbon graphite material and a preparation method thereof, the antioxidant modified carbon graphite material comprises the following raw materials by weight: 30-34 parts of medium temperature pitch, 4-6 parts of modified silica sol and 10-12 parts of artificial graphite powder; from two aspects, firstly, the aluminum dihydrogen phosphate and the boric acid aqueous solution are added, the aluminum dihydrogen phosphate can promote the asphalt to form a denser and firmer glassy carbon structure during carbonization, and phosphorus pentoxide generated by decomposition of the aluminum dihydrogen phosphate and boron oxide generated by dehydration of boric acid can generate a glass phase with an anti-oxidation effect; secondly, core-shell particles are added, a shell layer of the core-shell structure is an aluminum hydroxide structure generated by hydrolyzing aluminum nitrate nonahydrate, and an inner core is epoxidized nano silicon carbide; through the synergistic effect of the two, the mechanical property and the oxidation resistance of the carbon-graphite material are improved.

The invention discloses heat-resistant ammonium polyphosphate with ultrahigh polymerization degree and a synthesis method thereof. The method comprises the following steps: (1) preparing ammonium polyphosphate: S1, mixing phosphorus pentoxide and diammonium hydrogen phosphate, stirring to react, and introducing ammonia gas to react; s2, mixing phosphoric acid with melamine for reaction, supplementing phosphoric acid, and stirring for reaction; s3, when the temperature in the first-step reaction is 280-300 DEG C, stopping introducing the ammonia gas, adding a product obtained in the step S2, supplementing diammonium hydrogen phosphate, and introducing the ammonia gas to continue the reaction; (2) end sealing; (3) pre-curing; and (4) mixing and dissolving epoxy resin and a curing agent, and then coating the surface of the pre-cured ammonium polyphosphate with the mixture. The initial polymerization degree of the ammonium polyphosphate can be improved, the initial molecular weight of the ammonium polyphosphate is higher, the application capacity of the ammonium polyphosphate in a humid and hot environment can be improved after modification treatment, especially when the ammonium polyphosphate is soaked in hot water at the temperature of 80 DEG C for 4 h, the product does not separate out or migrate, and the stability of the flame-retardant effect of the product is guaranteed.

The invention discloses bacteriostatic and antibacterial lithium disilicate glass ceramic and a preparation method thereof. The bacteriostatic and antibacterial lithium disilicate glass ceramic comprises the following components in percentage by weight: 60-70% of lithium disilicate whiskers, 5-12% of a nucleating agent, 1-5% of aluminum oxide, 1-4% of calcium oxide, 5-10% of an antibacterial agent and 12-18% of fluorapatite, wherein the nucleating agent is formed by compounding phosphorus pentoxide and zirconium oxide, and the antibacterial agent is formed by compounding silver oxide and zinc oxide; the invention relates to the technical field of lithium disilicate glass ceramics. In the glass ceramic, silver ions can be combined with groups such as sulfydryl and amino in bacterial cells to interfere the metabolic process of bacteria and inactivate enzymes of the bacteria so as to inhibit growth and reproduction of the bacteria, and zinc ions can influence permeability of bacterial cell membranes and destroy physiological functions of the bacteria and cooperate with the silver ions to enhance the antibacterial effect of the glass ceramic.

The application provides a sulfide solid electrolyte and a preparation method thereof, and particularly relates to the technical field of secondary batteries. The sulfide solid electrolyte is a lithium phosphorus oxysulfide, and the chemical formula of the lithium phosphorus oxysulfide is Li7P3S 7.5+x‑5y O 3.5‑x+5y ; wherein, 0<=x<=3.5, 0<=y<=1.5, -7.5

The invention discloses a high-strength acrylate rubber material and a preparation method thereof, and relates to the technical field of high polymer materials. When the high-strength acrylate rubber material is prepared, polyhydroxy imidazolium salt and phosphorus pentoxide react to prepare a functional flame retardant; reacting the pre-modified glass fiber with hydrazine hydrate to obtain modified glass fiber; the preparation method comprises the following steps: carrying out solution polymerization on ethyl acrylate, butyl acrylate, acryloxy propyl bis (trimethylsiloxy) methylsilane and glycidyl methacrylate to prepare acrylate raw rubber; the high-strength acrylate rubber material is prepared by uniformly mixing acrylate raw rubber, the modified glass fiber, a functional flame retardant and triphenyl phosphine, plastifying and thin-passing. The high-strength acrylate rubber material prepared by the invention has excellent flame-retardant, antibacterial, anti-aging and mechanical properties.

The invention provides a synthesis method of an OLED polycyclic fused thiophene compound, and relates to the technical field of material synthesis, and the synthesis method comprises the following steps: providing and mixing 2-naphthalene sulfonic acid and dichloromethane, dropwise adding an N-bromosuccinimide solution into the mixture under the protection of inert gas, and reacting to obtain an intermediate A; dissolving the intermediate A, then adding sodium hydroxide, 4-bromophenylboronic acid, water and tetrakis (triphenylphosphine) palladium, and reacting to obtain an intermediate B; dissolving the intermediate B, adding sulfonic acid and phosphorus pentoxide, and reacting to obtain an intermediate C; adding the intermediate C into tetrahydrofuran, dissolving, adding lithium aluminum hydride under inert gas, and reacting to obtain a target compound. According to the method, the chemical reaction efficiency of the intermediate C is high, and the yield and LC purity of a target product are relatively high.

The invention discloses an anti-ultraviolet solar cell backboard film and a preparation method thereof, and relates to the technical field of solar cell backboards, the anti-ultraviolet solar cell backboard film comprises a first anti-ultraviolet functional layer, a polyester base layer and a second anti-ultraviolet functional layer from top to bottom in sequence; the first uvioresistant functional layer and the second uvioresistant functional layer are independently prepared from the following raw materials: a functional polymer, 2-acrylamido-2-methylpropanesulfonic acid, 1, 3-bis (oxiranyl methyl)-5-(2-propenyl)-1, 3, 5-triazine-2, 4, 6 (1H, 3H, 3H, 3H, 3H, 3H, 3H, 3H, 3H, 3H, 3H, 3H, 3H, 3H, 3H, 3H, 3H, 3H, 3H, 3H, 3H, 3H, 3H The invention relates to a high-temperature-resistant nano-emulsion which is prepared from N-(4-cyano-3-trifluoromethylphenyl) methacrylamide, N-(4-cyano-3-trifluoromethylphenyl) methacrylamide, a nano-assistant, a coupling agent, an initiator, polyphosphoric acid and phosphorus pentoxide. The backboard film is good in ultraviolet aging resistance, good in interlayer peel strength and excellent in barrier property.

The invention relates to silver-shielding glass powder, a glass powder composition and automobile glass silver-shielding ink. The silver-covering glass powder comprises the following components in percentage by mass: 20-50% of silicon dioxide, 0-20% of bismuth oxide, 10-30% of zinc oxide, 5-20% of boric oxide, 4-12% of sodium oxide, 4-10% of potassium oxide, 2-5% of lithium oxide, 0-5% of aluminum oxide, 0-5% of calcium oxide, 0-5% of magnesium oxide, 0-3% of phosphorus pentoxide, 0-12% of titanium dioxide, 0-2% of antimony trioxide and 0-2% of calcium fluoride. The silver-covering glass powder further comprises sulfide and / or elemental sulfur, and the sulfide and / or elemental sulfur account for 6-9% of the total mass of the components. Compared with the prior art, the silver-shielding ink for the automobile glass, which is excellent in comprehensive performance, is finally prepared by introducing elemental sulfur or sulfide into a silver-shielding glass system and controlling a melting process.

The invention discloses a phosphating monomer as well as a preparation method and application thereof. The phosphating monomer is prepared from acrylic acid hydroxyl ester, a dispersing solvent, phosphorus pentoxide and a polymerization inhibitor. The phosphating monomer has the following structure: # imgabs0 # R1 and R2 are independently selected from any one of the following groups: # imgabs1 # imgabs2 # imgabs3 #. The preparation process of the phosphating monomer provided by the invention is simple, the phosphating monomer can be prepared by using conventional water reducing agent generation equipment, other equipment does not need to be purchased, the equipment consumption is greatly reduced, the energy consumption is low, and the phosphating monomer has good economical efficiency; the prepared polycarboxylate-type water reducer has good dispersion and mud resistance, and besides, the polycarboxylate-type water reducer has a phosphate group with strong adsorption capacity and a carboxylic acid group, so that a better water reducing effect is provided; the novel monomer is synthesized to directly replace an acrylic monomer in the synthetic raw materials of the polycarboxylate superplasticizer, so that the polycarboxylate superplasticizer has better dispersing performance and mud resistance.

The invention relates to the technical field of flame-retardant nylon materials, and provides a halogen-free flame-retardant nylon material and a preparation method thereof, the halogen-free flame-retardant nylon material comprises the following components by mass: 80-120 parts of nylon, 30-40 parts of modified polyacrylate, 1-10 parts of modified nylon, 20-40 parts of a halogen-free flame retardant, and 0.1-5 parts of an auxiliary agent; the modified polyacrylate is a copolymer of phosphorus pentoxide, hydroxyl acrylate, acrylic acid, acrylate, glass fiber and antimony trioxide; the modified nylon is a copolymer of nylon and acrylate. The components have good affinity, a uniform and stable mixed system can be formed, the mechanical strength and flame retardant property of the nylon composite material can be obviously improved by introducing the components, the product is endowed with more excellent comprehensive performance, harm to the environment and human bodies can be avoided, the ecological friendliness is higher, and the nylon composite material is suitable for industrial production. The problems existing in the prior art are solved, and the method has important significance on development and further popularization of nylon products.

The present invention relates to a method for preparing high-purity metallic bismuth, and relates to the technical field of non-ferrous metal metallurgy. The preparation method comprises the following steps: (1) in an inert atmosphere, a bismuth-containing raw material, phosphorus pentoxide and sulfate accounting for 1 / 3 to 1 / 2 of the total amount of sulfate are melted to obtain a product, and then the product is skimmed to remove the generated phosphate scum to obtain metallic bismuth with a purity of 4N; (2) the metallic bismuth obtained by skimming in step (1) is ground and sieved, and then mixed with sulfate accounting for 1 / 2 to 2 / 3 of the total amount of sulfate and subjected to two-stage vacuum distillation; (3) while performing two-stage vacuum distillation in step (2), graded condensation is performed to obtain high-purity metallic bismuth with a purity of 5N. Compared with traditional vacuum distillation and zone smelting processes, the present invention has the advantages of good purification effect, high impurity removal efficiency, etc., and has good application prospects.

The invention relates to the technical field of dispersing agents, and discloses a preparation method of a polycarboxylate dispersing agent and application of the polycarboxylate dispersing agent in pesticides, 2-allylpentyl-4-alkenyl amine and 4-bromo-1-butanol are subjected to a substitution reaction to obtain an intermediate 1, then the intermediate 1 and 1, 3-propane sultone are subjected to a ring-opening reaction to obtain an intermediate product 2, and the intermediate product 2, 3-propane sultone is subjected to a ring-opening reaction to obtain the polycarboxylate dispersing agent. The intermediate product 2, perfluorooctanoyl chloride and phosphorus pentoxide are sequentially used for reaction to obtain fluorine-containing diene and diene phosphate, and finally acrylic acid, allyl polyethylene glycol, the diene phosphate, the fluorine-containing diene and the like are used as raw materials for reaction to obtain the polycarboxylate dispersing agent. The polycarboxylate dispersing agent prepared by the invention has a relatively good dispersing effect and has a wide application prospect in the field of pesticides.

The invention belongs to the technical field of lithium ion battery materials, and particularly relates to a method for synthesizing lithium hexafluorophosphate from lithium tripolyphosphate. The synthesis method comprises the following steps: uniformly mixing lithium tripolyphosphate and phosphorus pentoxide in an ether solvent to obtain a first mixture; introducing a mixed gas of hydrogen fluoride and nitrogen into the first mixture, and carrying out a mixed reaction to obtain a second mixture; and carrying out solid-liquid separation on the second mixture, and carrying out reduced-pressure concentration, recrystallization and reduced-pressure drying on the filtrate after solid-liquid separation to obtain lithium hexafluorophosphate. The lithium tripolyphosphate, the phosphorus pentoxide and the hydrogen fluoride are used as raw materials, the hydrogen fluoride gas is uniformly introduced for reaction, the lithium hexafluorophosphate is directly synthesized in the ether solvent, and the method has the advantages of mild reaction conditions, high reaction efficiency, high product purity and high yield. The problems of more byproducts, high cost and the like in the industrial production process of lithium hexafluorophosphate are solved.

The invention discloses a phosphorite ore blending optimization method based on a multi-modal large model and intelligent interaction hardware. The phosphorite ore blending optimization method comprises the following specific steps: 1) collecting related parameters; 2) dynamically optimizing and inputting the multi-modal large model; and 3) dynamically optimizing and outputting the multi-modal large model. The invention relates to the field of methods, in particular to a phosphorite ore blending optimization method based on a multi-modal large model and intelligent interaction hardware, and particularly relates to a phosphorite ore blending optimization system and method based on the multi-modal large model. Through fusion of deep learning, conditional constraint planning and intelligent interaction hardware, multi-target dynamic optimization of phosphate ore blending is realized, and the method is suitable for low-cost ore blending scheme generation under multi-index constraints of phosphorus pentoxide (PO), magnesium oxide (MgO), arsenic (As) and calcium oxide (CaO).

This invention belongs to the field of high-performance materials and discloses a method for preparing a controllable PBO polymer. The steps are as follows: phosphorus pentoxide is dissolved in polyphosphoric acid to obtain high-concentration polyphosphoric acid; in reactor A, DAR and small-particle-size TPA are subjected to initial prepolymerization in the high-concentration polyphosphoric acid; the above materials are transported to reactor B, and large-particle-size TPA is added for secondary prepolymerization; final polymerization is carried out in a twin-screw extruder, and by adding an appropriate amount of DAR, a PBO polymer with controllable degree of polymerization is obtained; the PBO polymer is precipitated in water and dried to obtain the PBO polymer. This method first adds phosphorus pentoxide to polyphosphoric acid to prepare high-concentration polyphosphoric acid, avoiding the problems of poor powder dispersion, exothermic dissolution, and excessively high temperature that occur when adding phosphorus pentoxide during the polymerization reaction. Furthermore, by adding DAR monomer in the extruder to control the degree of polymerization of PBO macromolecules, the degree of polymerization is controllable, which has high practical value.

The invention discloses a method for preparing a porphyrin ring-branched polybenzimidazole and a porphyrin ring-branched polybenzimidazole proton exchange membrane. The porphyrin ring-branched polybenzimidazole is prepared by the following method: in polyphosphoric acid containing phosphorus pentoxide, at least one of the aromatic tetraamine monomers shown in formula I, at least one of the dicarboxylic acid monomers shown in formula II and the tetrakis(4-carboxyphenyl)porphine shown in formula III are subjected to polycondensation reaction to obtain the porphyrin ring-branched polybenzimidazole. The invention provides a method for preparing a homogeneous proton exchange membrane using the porphyrin ring-branched polybenzimidazole. The proton exchange membrane prepared by the invention has good solubility, antioxidant stability, mechanical properties, dimensional stability and high proton conductivity.