639 results about "Aluminum Ion" patented technology

A method for removing iron and aluminum from a lateritic nickel ore leachate by means of a goethite process, which method comprises the following steps: first-stage iron and aluminum removal, involving: adding a precipitant solution to a lateritic nickel ore leachate, reacting same for 45-90 minutes with the feeding speed controlled to be 5-80 mL / min, the pH controlled to be 3.0-3.2 and the reaction temperature controlled to be 60-70ºC, and performing solid-liquid separation, so as to obtain first-stage iron and aluminum residues and a filtrate; and second-stage iron and aluminum removal, involving: adding a precipitant solution to the filtrate, reacting same for 30-60 minutes with the pH controlled to be 4.3-4.4 and the reaction temperature controlled to be 60-70ºC, and performing solid-liquid separation, so as to obtain second-stage iron and aluminum residues and a purified liquid. Two-stage iron and aluminum removal is used; in the first stage, iron ions in the leachate are effectively separated at a relatively low pH value by controlling the feeding speed, generated residue particles are large, good filtering performance is achieved, and few valuable metals such as nickel, cobalt and manganese are entrained in the residues; in the second stage, the pH is adjusted to 4.3-4.4 to precipitate aluminum ions and the remaining iron ions; and the whole technological process is simple.

The preparation method comprises the following steps: treating sepiolite serving as a raw material with 3-aminopropyltriethoxysilane to prepare aminated sepiolite, ultrasonically blending the aminated sepiolite and a modified filler, then treating with phytic acid to prepare a flame-retardant filler, melting bisphenol A polycarbonate, blending with the flame-retardant filler, and carrying out extrusion molding to obtain the flame-retardant fireproof plastic. When the flame-retardant fireproof plastic is combusted, the flame-retardant filler is subjected to evaporation of hot water molecules to cause structural expansion and form an isolation layer, meanwhile, evaporation of the water molecules can take away heat, released ammonia gas can reduce the content of smoke so as to achieve the flame-retardant effect, and generated inorganic acid and phosphate ester are dehydrated and carbonized, so that the flame-retardant fireproof plastic has a good flame-retardant effect. The carbon layer with large interlayer spacing is formed through cooperation with the isolation layer, an organic silicon structure is contained, Si-C can be formed, then the density of the carbon layer is increased, aluminum oxide and magnesium oxide can be formed after internal aluminum ions and magnesium ions are combusted at high temperature, then the flame retardance of the carbon layer is improved, and the flame-retardant and fireproof effects of the plastic are improved.

The invention discloses a preparation and regeneration method of an iron-aluminum-lanthanum-based composite fluorine removal agent, relates to the technical field of fluorine removal agent preparation, and aims to solve the problem that the performance of an existing fluorine removal agent needs to be improved. The preparation method comprises the following steps: weighing raw materials according to a molar ratio of iron ions to aluminum ions to lanthanum ions of 1: 1: 1, fully stirring and dissolving the raw materials in deionized water at room temperature, and making the volume constant to prepare a clear mixed solution; adding excessive triethanolamine into the mixed solution, dropwise adding a nitric acid solution, adjusting the pH value of the mixed solution to 3.0-4.0, continuously stirring at room temperature, and fully reacting to obtain a precursor solution; continuously heating and stirring the precursor liquid at 150 DEG C for dehydration to obtain organic group brown fluffy precursor powder; fully grinding the precursor powder, and calcining to obtain a gray powdery iron-aluminum-lanthanum-based composite fluorine removal agent; the method is simple, the prepared fluorine removal agent is large in adsorption capacity and short in reaction time, most of the adsorption capacity can be recovered through simple acid pickling, operation is easy, the service life is long, and the regeneration cost is low.

A positive electrode sheet, a secondary battery, and an electric device. The positive electrode sheet comprises a positive electrode current collector, a positive electrode active material layer located on at least one side of the positive electrode current collector, and a base coating located between the positive electrode current collector and the positive electrode active material layer; the base coating comprises an additive, and the additive comprises a compound containing at least one group among a carboxylic acid group, a phosphate group, and a fluoro group. The provision of the base coating between the positive electrode current collector and the positive electrode active material layer can effectively reduce corrosion of an electrolyte to the positive electrode current collector. Moreover, the additive comprised in the base coating contains at least one group among the carboxylic acid group, the phosphate group, and the fluoro group and thus the additive can effectively complex and / or capture free aluminum ions, so that the effect of protecting the positive electrode current collector can be further achieved, and free aluminum ions can be prevented from migrating to a negative electrode, thereby avoiding damage to an SEI membrane by the free aluminum ions.

The invention provides a natural graphite composite negative electrode material and a preparation method thereof, and a lithium ion battery, the natural graphite composite negative electrode material comprises natural graphite, a fluffy net-shaped three-dimensional carbon network coated outside the natural graphite, and an amorphous carbon coating layer arranged outside the fluffy net-shaped three-dimensional carbon network; wherein magnesium ions and / or aluminum ions are dispersed in the fluffy three-dimensional carbon network, and copper particles and / or silver particles are doped in the amorphous carbon coating layer. The natural graphite composite negative electrode material provided by the invention has a three-dimensional conductive network, is doped with metal, and has good conductivity and excellent electrochemical cycle performance.

The invention discloses a preparation method of a spherical cerium-based abrasive material with high hardness and high Ce < 3 + > content. The method comprises the following steps: 1, carrying out hydrothermal reaction on cerium salt and aluminum salt in an ethylene glycol solution to generate a cerium-based abrasive precursor; 2, firing the cerium-based abrasive precursor to obtain a cerium oxide spherical abrasive doped with aluminum oxide; and 3, reducing the cerium oxide spherical abrasive by sodium borohydride to obtain the spherical cerium-based abrasive with high hardness and high Ce < 3 + > content. According to the method, aluminum ions are doped into the cerium oxide spherical abrasive through a one-step hydration method, the hardness of the abrasive is improved, meanwhile, a large amount of Ce < 4 + > is efficiently and rapidly reduced into Ce < 3 + > ions through an in-situ reduction method, and the polishing efficiency of the abrasive is improved. The cerium-based abrasive synthesized by the method is uniform in granularity, good in morphology, high in hardness and high in Ce < 3 + > content, and the polishing rate of silicon carbide can be remarkably increased and the surface roughness can be remarkably reduced when the cerium-based abrasive is prepared into a silicon carbide polishing solution; and the preparation method is simple, good in repeatability, green and environment-friendly, and beneficial to industrial production.

The invention provides a method for recycling scandium, iron and aluminum from acid leachate through fractional precipitation, and belongs to the field of hydrometallurgy. The method comprises the following steps: adding a reducing agent into an acid leaching solution to obtain a first modified leaching solution; adding a stable complexing agent into the first modified leaching solution to obtain a second modified leaching solution; adding a pH regulator into the second modified leaching solution, and regulating the pH value of the second modified leaching solution to 3.5-4.5 to obtain a coarse scandium product and a scandium precipitation solution; an oxidizing agent is dropwise added into the scandium precipitation solution, and an iron product and an iron precipitation solution are obtained; and adding a pH regulator into the iron precipitation liquid to regulate the pH value of the iron precipitation liquid to be greater than or equal to 6.0, and carrying out ultrasonic enhanced aluminum ion precipitation to obtain an aluminum product and an aluminum precipitation liquid. Selective modification of metal ions is achieved by adding a reducing agent and a complexing agent, scandium is precipitated through pH regulation and control, iron is precipitated through oxidation regulation and control, and finally complexation and precipitation of aluminum are blocked, so that the separation efficiency of scandium, iron and aluminum in the acid leaching solution is improved at the same time.

The invention relates to the technical field of concrete admixture accelerators, in particular to an alkali-free powdery accelerator core master batch, and particularly relates to a preparation method and application of the high-performance powdery alkali-free accelerator core master batch. The anti-caking agent comprises the following raw materials in parts by weight: 50-75 parts of a coagulation accelerating component, 5-15 parts of fluosilicate, 10-20 parts of a fluorine-aluminum complex, 5-10 parts of an early strength component, 1-2 parts of a suspension component, 1-3 parts of a pH adjusting component and 0.5-1 part of an anti-caking component, according to the high-performance powdery alkali-free accelerator core master batch disclosed by the invention, aluminum ions are introduced to the greatest extent, and fluorine in the high-performance powdery alkali-free accelerator core master batch is also increased, so that combination of main effective components is realized, and the performance of a powdery alkali-free accelerator is greatly improved.

The invention belongs to the technical field of lithium slag resource utilization, and discloses a composite exciting agent for lithium slag as well as a preparation method and application of the composite exciting agent. The composite activator comprises the following components in parts by weight: 10-20 parts of an alkali activator, 10-20 parts of a sulfate activator, 15-30 parts of activated aluminum, 1-8 parts of a nano filler and 3-10 parts of a dispersant. An alkali activator and a sulfate activator are used as main materials, the advantages of the alkali activator and the sulfate activator are integrated, the alkaline environment promotes release of active silica-alumina species, the sulfate activator reacts with active aluminum to generate ettringite and other gel products, meanwhile, the active aluminum supplements aluminum ions, gel generation is promoted, and the gel is formed. The nano filler can fill pores and promote generation of C-S-H gel, and the dispersing agent can effectively disperse the active excitation component and the lithium slag.

The invention discloses porous alumina powder as well as a preparation method and application thereof. The specific surface area of the porous alumina powder is 10m < 2 > / g-50m < 2 > / g, the particle size range is 300nm-2000nm, the aperture range is 1nm-80nm, and the surface free energy is 30mN / m-45mN / m. The performance of aluminum oxide is optimized by selecting a specific particle size range, a specific pore size range and a specific surface area, and it is required that the aluminum oxide contains a porous structure, overexposure of unsaturated aluminum ions on the surface needs to be reduced, that is, the surface free energy needs to be controlled, so that the aluminum oxide has high hydroxyl adsorption capacity, the absorption rate on a polar solvent is increased, and the service life of the aluminum oxide is prolonged. And meanwhile, the adsorption capacity of hydroxyl is not suitable to be too strong, so that the storage and the use are not influenced. Therefore, when the aluminum oxide with the structure is used for coating the diaphragm, the liquid absorption and liquid retention capabilities of the diaphragm are remarkably improved, and the comprehensive performance of the battery diaphragm is improved.

The invention discloses an acid recovery process based on nanofiltration-reverse osmosis, and belongs to the technical field of wastewater treatment, the acid recovery process comprises the following steps: step 1, adsorbing aluminum ions in chemical polishing waste liquid through extraction resin, evaporating and concentrating effluent, and using the effluent as recycled chemical polishing tank acid liquid; step 2, desorbing the adsorbed extraction resin by using distilled water, separating aluminum ions from the obtained desorption liquid through diffusion dialysis, and separating the recovered acid liquid through nanofiltration; step 3, concentrating the nanofiltration thin liquid through reverse osmosis to obtain concentrated acid liquid which is used as recycled sulfuric acid desorption liquid; and 4, adding alkali into the diffusion dialysis residual liquid, the nanofiltration concentrated liquid and the reverse osmosis thin liquid for neutralization to prepare the aluminum-containing flocculating agent. According to the method, adsorption, diffusion dialysis, nanofiltration and reverse osmosis processes are combined, and an amino-containing imidazolium salt modified polyamide nanofiltration membrane and a phosphonic acid-sulfonic acid bifunctional group-containing reverse osmosis membrane are adopted, so that efficient separation and recovery of acid and aluminum ions in the chemical waste liquid are realized, and economic benefits are increased while the cost is reduced.

The invention provides a vanadium aluminum phosphate electrode material and a preparation method thereof. In target product components, an aluminum source, a vanadium source and a phosphorus source are respectively aluminum nitrate or other aluminum sources, vanadium pentoxide or ammonium vanadate, ammonium dihydrogen phosphate, phosphoric acid or other phosphorus sources, and a nitrogen source of nitrogen-doped carbon is from polyvinylpyrrolidone or other nitrogen sources of a gel component; the carbon source is selected from polyvinyl alcohol and glycerol. By adopting an exogenous plasticizing physical crosslinking sol-gel method, in the whole reaction system, uniform distribution of reaction ions and intermediates is maintained, and finally, gel is networked, so that the problem of capacity fading caused by an unstable structure of an existing aluminum ion battery positive electrode material in a circulating process is solved, and the service life of the aluminum ion battery positive electrode material is prolonged. And the problems of high reaction system selection requirement, long preparation period and complex process of the existing endogenous covalent polycondensation sol-gel method for preparing the electrode material are solved.

The invention provides a method for removing fluorine and aluminum from a rare earth feed liquid, which comprises the following steps: injecting the rare earth feed liquid into a base solution to carry out an overflow reaction, adding an alkaline material in the overflow reaction process to adjust the pH value of the system, and carrying out solid-liquid separation treatment on the material obtained by the overflow reaction to obtain a rare earth purified feed liquid and aluminum fluorine slag, wherein the base solution comprises defluorinated rare earth feed liquid. According to the method, the aluminum ions and the fluorine ions in the rare earth feed liquid can be synchronously and efficiently removed through a simple process, the problem that the content of the aluminum ions and the fluorine ions in the rare earth feed liquid is too high is solved, and the quality of a rare earth product is greatly improved.

The invention discloses a Schottky diode and a manufacturing method thereof, and relates to the technical field of semiconductors. The semiconductor device comprises a semiconductor substrate, a first doped region, a second doped region and a third doped region, the semiconductor substrate comprises a first surface region, the first doped region extends into the semiconductor substrate from the first surface region, and the first doped region is obtained by doping aluminum ions with a first doping concentration. The second doped region extends from the first surface region to the semiconductor substrate, and the first doped region and the second doped region are arranged in a staggered manner along the first direction of the first surface region. The second doped region is obtained by doping aluminum ions with a second doping concentration, and the first doping concentration is greater than the second doping concentration. The third doped region extends into the semiconductor substrate from the first surface region and is obtained by doping aluminum ions with the first doping concentration, and the area of the third doped region is larger than that of the first doped region. Therefore, the reverse voltage withstanding performance of the diode is improved, and the forward conduction voltage drop is reduced.

The invention discloses a method for resource utilization of nitrogen and aluminum in secondary aluminum ash, and belongs to the technical field of solid waste treatment, the method comprises the following steps: S1, bio-enzyme pretreatment: drying and crushing the secondary aluminum ash, mixing with a buffer solution containing a specific bio-enzyme, carrying out a stirring reaction under proper temperature and pH conditions, and carrying out solid-liquid separation; aluminum nitride and other aluminum-containing compounds are decomposed; s2, bio-enzyme catalytic hydrolysis: transferring the pretreated mixture into a hydrolysis reactor, adding bio-enzyme and adjusting conditions, performing catalytic hydrolysis on aluminum nitride and an aluminum-containing compound, and releasing nitrogen and aluminum ions; according to the method, the secondary aluminum ash is pretreated through the biological enzyme to decompose aluminum nitride and other aluminum-containing compounds, and the specificity of the biological enzyme is utilized, so that the resource recovery efficiency is improved, and the environmental pollution is reduced. The pH value and the temperature of the hydrolysate are monitored through the online pH meter and the temperature sensor, so that accurate control on the reaction process is realized.

The invention relates to the technical field of water treatment filter materials, in particular to an intelligent clean gradient composite water purification filter element and a preparation method thereof. The filter element adopts an integrated design of'natural gradient base material + ZIF-67 function enhancement + fluorescence-ultrasonic intelligent regeneration ': modified vegetable sponge is used as a porous support layer, a silica gel / ZIF-67 composite gradient layer is constructed on the porous support layer to realize adsorption and antibacterial dual functions, and dopamine-aluminum ions are used for composite surface modification to enhance hydrophilicity and interlayer binding force; a matched automatic system senses pollution in real time through the fluorescence monitoring module and triggers the ultrasonic regeneration module to complete self-cleaning, and the flux recovery rate is larger than or equal to 97.5%; the interception rate of the filtering element to anabaena under the operation pressure of 0.1-0.3 MPa is larger than or equal to 99.2%, the filtering flux is increased by 6-8 times compared with that of a commercial element, the filtering element can tolerate complex water quality in the coexistence of drugs and personal care products, natural vegetable sponge serves as a base material, and the filtering element has the advantages of biocompatibility and low cost and is suitable for drinking water purification and eutrophication water body treatment.

The invention provides an amorphous high-entropy sulfide for an aluminum ion battery positive electrode and a preparation method and application thereof, the chemical general formula of the amorphous high-entropy sulfide is MS4, M is selected from at least five metal elements of Li, Mo, Ni, Cu, Mn, W, Ti, Nb, Zr, Zn and La, and at least comprises Mo, Cu, Ti and Nb. The preparation method comprises the following steps: S1, burdening; S2, preparing different types of monometal sulfide precursors by high-energy ball milling; and S3, preparing the amorphous high-entropy sulfide by high-energy ball milling. The high-entropy sulfide prepared by the method is in an amorphous state, and when the high-entropy sulfide is used as the aluminum ion battery positive electrode material, the problems that the positive electrode material in the prior art is insufficient in aluminum ion adsorption, low in storage capacity, complex in preparation condition, difficult to produce on a large scale and the like can be solved. The obtained aluminum ion battery shows good electrochemical performance and has an extremely high commercial application prospect.

The invention discloses a purification method for reducing aluminum ion residues in leucine, which comprises the following steps: 1, dissolving a leucine sample in deionized water until the concentration is 10.0-22.0 g / L, adding hydrochloric acid to adjust the pH value, heating to 75-85 DEG C for dissolving, slowly stirring, and cooling to room temperature; 2, enabling the aqueous solution to pass through amino phosphonic acid chelate resin at a flow rate of 5.0-10.0 BV, and collecting effluent; and step 3, adding activated carbon into the effluent for decoloration for 40 minutes, and carrying out refined filtration and decarburization to obtain a decolorized solution. The invention relates to the technical field of amino acid purification, and according to the purification method, macroporous structure chelating resin with a weakly acidic active group (aminophosphonic acid) is adopted to selectively adsorb aluminum ions, and an acid-soluble water-washing process is adopted, so that trace aluminum ion residues in leucine are effectively reduced. The method is low in equipment requirement and simple to operate, the content of aluminum ions can be reduced to 0.2 ppm or below, the leucine loss is extremely low, the repeated utilization rate of the resin is high, and the production cost is greatly reduced.

The invention discloses an aluminum ion battery positive pole piece, an aluminum ion battery and a preparation method, and belongs to the field of batteries. The positive pole piece of the aluminum ion battery comprises an active substance and a binder, the binder is a mixture of 3, 4-ethylenedioxythiophene: polystyrene sulfonate and a functional agent; the active substance is one of graphite, polytriphenylamine, polydiphenylamine, polythiophene, polypyrrole, polyaniline and graphene; the functional agent is one of tannic acid, polyethylene oxide, sorbitol, polyethyleneimine, glycerol and xylitol. Anions of polystyrolsulfon acid and positive ions of 3, 4-ethylenedioxythiophene molecules form positive and negative electron pairs, so that the adhesive has conductivity; the binder enables the active substances to be mutually connected to form conductive chains through intermolecular acting force, and the conductive chains are mutually contacted to form a conductive network. The positive pole piece adopting the binder has good conductivity, temperature resistance and cohesiveness, and does not react with electrolyte, so that the performance of the aluminum ion battery is improved.

The invention provides a comprehensive utilization method of clay type lithium ore, and relates to the field of hydrometallurgy. The comprehensive utilization method of the clay type lithium ore comprises the following steps: mixing the clay type lithium ore with concentrated sulfuric acid, and carrying out low-temperature roasting at the temperature of 100-300 DEG C to obtain a roasted cured material; adding water into the roasted and cured material, leaching, and carrying out solid-liquid separation to obtain a lithium-rich aluminum leaching solution; adsorbing the lithium-rich aluminum leaching solution by using an aluminum ion sieve adsorbent to obtain an aluminum-rich adsorbed solution and a lithium-loaded ion sieve; analyzing the lithium-loaded ion sieve to obtain a lithium-rich desorption solution; the lithium-rich desorption solution is sequentially subjected to purification and lithium precipitation, and battery-grade lithium carbonate is obtained; sequentially carrying out iron removal, purification and impurity removal on the aluminum-rich adsorption post-liquid to obtain iron slag and an aluminum sulfate solution; and sequentially carrying out aluminum precipitation and roasting on the aluminum sulfate solution to obtain the metallurgical-grade aluminum oxide. The method has the advantages of high-efficiency leaching of lithium and aluminum, high-efficiency separation of lithium and aluminum, environment friendliness, simple process and the like.

The invention discloses a three-dimensional porous carbon encapsulated V2O5 carbon fiber electrode constructed by in-situ growth and a preparation method and application thereof, belongs to the technical field of aluminum ion battery positive electrode materials, and aims to solve the problems that the intercalation and deintercalation dynamics of AlCl4 in a polyacrylonitrile (Pan)-based carbon fiber is blocked due to disordered graphite structure, and the performance of the Pan-based carbon fiber is influenced. And the material cannot be used as an effective electrode material to be applied to an aluminum ion battery system. According to the preparation method, an in-situ growth technology is adopted, a three-dimensional porous carbon substrate is grown on the surface of carbon fiber, then an orthorhombic system vanadium pentoxide (V2O5) nano material which has high theoretical specific capacity and can realize large-current charging and discharging is packaged in the three-dimensional porous carbon substrate, and the V2O5-based carbon fiber electrode is prepared. According to the electrode, the electrostatic interaction between Al < 3 + > ions and crystal lattices is effectively relieved, the structural advantages of the carbon fibers and the energy storage performance of V2O5 are fully combined, the energy storage effect of the aluminum ion battery is remarkably improved, and a new effective scheme is provided for development of aluminum ion battery electrode materials.

The invention discloses porous alumina as well as a preparation method and application thereof, and relates to the technical field of porous materials. The preparation method comprises the following steps: firstly, carrying out hydrothermal reaction on aluminum hydroxide slurry containing aluminum hydroxide, aluminum oxide seed crystal and a dispersing agent, enabling porous aluminum oxide precursor slurry obtained by the hydrothermal reaction to be in an alkaline environment, adjusting the pH value of the slurry to 7.0-8.5 through acid adjustment, and then carrying out solid-liquid separation, calcination and other processes. Aluminum ions in the solution can be washed away in the solid-liquid separation (such as filter pressing) process through the acid adjusting process, large-particle single crystals in the porous aluminum oxide precursor are reduced, the obtained porous aluminum oxide precursor is uniform in crystal size, and the monodisperse porous aluminum oxide precursor is prepared through the synthesis section. And after subsequent calcination, the morphology is regular, the particle size distribution is narrower, and the monodisperse porous alumina powder can be obtained only through agglomeration formed by ultrafine scattering and calcination of the jet mill.

The invention belongs to the field of ferrite materials, and particularly relates to a high-coercivity strontium ferrite with iron partially replaced by aluminum and a preparation method of the high-coercivity strontium ferrite. Aiming at the problem of low coercive force of a ferrite pre-sintering material in the prior art, iron is partially replaced by aluminum, ferric nitrate, strontium nitrate, aluminum nitrate and glucose are used as reaction raw materials, the ratio of the total molar weight of Fe and Al to the molar weight of Sr is (9.5-12): 1, the ratio of the molar weight of Al to the total molar weight of Fe and Al is (0-0.41): 1, and the molar weight of glucose is 0.5-3.5 times of the total molar weight of Fe, Al and Sr; and calcining at 900-1200 DEG C for 1-3 hours by adopting a solution self-combustion-aluminum ion substitution method to prepare the strontium permanent magnetic ferrite powder material with high coercivity.

The invention relates to a preparation method of an aluminum polycarboxylate precursor and an aluminum oxide fiber, the aluminum polycarboxylate precursor is stable and has good spinnability, and the aluminum oxide fiber keeps complete fiber morphology and stable crystal phase at 1200 DEG C. The preparation method comprises the following steps: by taking aluminum chloride salt as an aluminum source and potassium carboxylate as an organic ligand of aluminum ions, removing chloride ions by utilizing a potassium salt precipitation method to obtain a polycarboxylic acid aluminum precursor; and taking a high-molecular polymer as a spinning aid, obtaining an alumina precursor fiber by virtue of an electrostatic spinning technology or a centrifugal thread throwing technology, and carrying out heat treatment to obtain the alumina fiber. The method has the advantages of simple synthesis process, good sol stability and spinnability, low cost, no environmental pollution in heat treatment and the like. The prepared alumina fiber is stable in crystalline phase and microstructure, complete in fiber form under the high-temperature condition and capable of being applied to the fields of high-temperature heat insulation, catalyst carriers and the like.

The invention discloses a waste lithium iron phosphate positive electrode material full-resource cyclic regeneration method, and belongs to the technical field of lithium ion batteries, the regeneration method comprises the following steps: S1, adding an oxalic acid solution to carry out acid leaching treatment on a waste lithium iron phosphate positive electrode material; s2, solid and liquid in the mixture obtained through acid leaching treatment are separated, and first filtrate and first filter residues are obtained; s3, adding an impurity removal agent into the first filtrate, and precipitating and removing copper ions, aluminum ions and fluorine ions in the first filtrate to obtain second filtrate; s4, mixing the first filter residue, sodium hydroxide and hydrogen peroxide, and reacting; carrying out solid-liquid separation on the reacted mixed solution to obtain second filter residues; and S5, mixing the second filtrate with the second filter residue to prepare the lithium iron phosphate positive electrode material. The regeneration method provided by the invention has the advantages of short process and few byproducts; only impurities in the waste lithium phosphate are removed, the obtained second filtrate and second filter residue are directly used for preparing the lithium iron phosphate positive electrode material, and phosphorus and iron elements are recycled and regenerated.

The invention relates to a method for preparing 5-hydroxymethylfurfural through mild catalysis of aluminum ions. The method comprises the following steps that S1, carbohydrate and aluminum ion salt are dissolved in a solvent; s2, reacting for 24 to 48 hours in a reaction atmosphere under the condition of 80 to 120 DEG C; s3, filtering to obtain a 5-hydroxymethylfurfural sample; the mass ratio of the carbohydrate to the aluminum ion salt is 1: 1, and the mass-volume ratio of the carbohydrate to the solvent is (0.01-1g): 1mL. According to the scheme disclosed by the invention, the reaction conditions are simple and mild, the yield of the obtained 5-hydroxymethylfurfural sample can reach 99.8%, and the 5-hydroxymethylfurfural sample has the same HPLC signal as a commercially available 5-hydroxymethylfurfural standard sample and the same infrared spectrum signal as the commercially available 5-hydroxymethylfurfural standard sample; no obvious by-product peak is observed in a nuclear magnetic resonance spectrogram of a 5-hydroxymethylfurfural sample, and the product purity is extremely high. Due to high selectivity and high yield of the reaction, separation and purification of the 5-hydroxymethylfurfural are simplified, and subsequent reaction is facilitated.

The invention provides a method for extracting and separating rare earth and aluminum from an acetic acid solution by using dynamic difference, which comprises the following steps: extracting the acetic acid solution containing rare earth and aluminum for 5-30 seconds by using an organic phase containing a phosphoric acid extracting agent to realize selective separation of rare earth and aluminum ions to obtain a rare earth-loaded organic phase and an aluminum-containing raffinate; the phosphoric acid-containing extraction agent comprises a P204 extraction agent and / or a P507 extraction agent; in the acetic acid solution containing rare earth and aluminum, the concentration sum of acetic acid and acetate is 0.3 mol / L-3. 5mol / L; the pH value of the acetic acid solution containing rare earth and aluminum is 4.0-5.0. As the coordination constant of aluminum ions and acetate is larger than that of rare earth ions and acetate, when the method is used for treating the acetic acid solution containing rare earth and aluminum, rare earth can be directly extracted and separated from the solution, and meanwhile, the method has the advantages that the operation is simple and convenient, and the method can be realized by using existing conventional equipment.

A manufacturing process of metal-organic framework porous material of aluminium and terephthalic acid comprises the steps of aluminium substrate synthesis with elution of aluminium ions from the aluminium substrate using a basic solution followed by adjustment of pH using an acidic solution; terephthalic acid synthesis from polyethylene terephthalate (PET) by distillation method in a basic solution followed by adjustment of pH using an acidic solution to yield terephthalic acid precipitate, filtering, drying and dissolving of the obtained terephthalic acid in a basic solution until equivalent; addition of the aluminium substrate for a reaction; separation of the obtained precipitate of the metal-organic framework porous material product from solution; and drying.

An ion source for generating an ion beam containing aluminum ions is disclosed. The ion source includes a first gas source to introduce an organoaluminium compound into the arc chamber of the ion source. A second gas, different from the first gas, which is a chlorine-containing gas is also introduced to the arc chamber. The chloride co-flow reduces the buildup of decomposition material that occurs within the arc chamber. This buildup may occur at the gas bushing, the extraction aperture or near the repeller. In some embodiments, the second gas is introduced continuously. In other embodiments, the second gas is periodically introduced, based on hours of operation or the measured uniformity of the extracted ion beam. The second gas may be introduced from second gas source or from a vaporizer.

The invention belongs to the technical field of zircon refractory aggregates, and discloses an in-situ formed mullite reinforced zircon spherical compact aggregate and a preparation method thereof.The zircon aggregate is directly prepared from zircon powder, clay powder and silica powder as raw materials through a granulation method, and the zircon aggregate is subjected to alumina sol vacuum impregnation and then is subjected to ball milling to obtain the in-situ formed mullite reinforced zircon spherical compact aggregate. And sintering to obtain the in-situ formed mullite reinforced zirconite spherical compact aggregate. In the invention, the alumina sol and the zirconite generate needle-like mullite in situ, and the zirconia phase fills the gap and is interwoven with the gap; the mullite gradient structure is formed by the needle-like mullite and mullite generated through clay reaction, the mullite is used as a medium to accelerate aluminum ions to migrate outwards from the inside of the zirconite spherical aggregate, and therefore the mullite gradient structure is formed, the preparation process is simple, the volume density is high, the anti-stripping performance is good, the high-temperature performance is stable, and the strength is high; the zircon refractory material is a preferable material for preparing zircon refractory materials and zircon ceramics for glass kilns.