27 results about "Manganous-manganic oxide" patented technology

The application belongs to the technical field of battery materials, and specifically discloses a preparation method of battery-grade trimanganese tetraoxide. The application first mixes a complexing agent, a pH regulator and an ethanol aqueous solution to obtain a mixed solution; then the mixed solution is mixed with a manganese source to perform a complexing dissolution reaction; after the reaction is completed, oxygen is introduced into the mixed solution to sequentially perform an oxidation reaction, an induced hydrolysis assembly and aging, so as to obtain the battery-grade trimanganese tetraoxide; the complexing agent comprises one or more of glycine, sodium glutamate, ammonium acetate, triammonium citrate and aminotri (methylene) phosphonic acid. The preparation method provided by the application has the advantages of few steps, short path and low energy consumption; and the trimanganese tetraoxide obtained finally has the advantages of stable properties, high quality, high sphericity and high manganese content.

This invention discloses a method for recovering manganese from manganese metallurgical slag through low-temperature roasting and water leaching. The manganese metallurgical slag is dehydrated by pressure filtration, dried, and then mixed uniformly with a flux. Under inert gas protection, the mixture is heated to 180°C in a tubular furnace and roasted at a constant temperature. The temperature is then increased to 280°C and roasted further, followed by a further increase to 620°C and roasting. After roasting, the mixture is naturally cooled to room temperature. A roasted slag sample is taken out, and deionized water is added to leach manganese sulfate at room temperature. The mixture is filtered to separate the manganese sulfate, yielding a crude manganese sulfate solution and a leaching residue. The crude manganese sulfate solution undergoes multi-stage impurity removal, and ammonium bicarbonate is added to convert the manganese sulfate into manganese carbonate. After washing, filtration, and calcination, solid manganese tetroxide is obtained. This method utilizes a pyrometallurgical flux under inert gas protection to efficiently sulfatate the metal in the manganese metallurgical slag, whereby manganese forms soluble MnSO4. This enables the water leaching extraction of MnSO4 from the roasted slag. After graded impurity removal, high-purity manganese tetroxide is prepared, solving the resource waste and environmental pollution problems caused by manganese metallurgical slag.

This invention belongs to the field of battery cathode material technology, specifically relating to a core-shell structured manganese tetroxide, its preparation method, and its application. The preparation method of the core-shell structured manganese tetroxide of this invention includes the following steps: (1) adding PEG, ZIF-8, and Zn to a container containing a manganese sulfate solution. 2+ (1) Ammonia solution is introduced into the container and heated to react; (2) After the reaction is completed, the solid and liquid are separated, and the obtained solid is washed and dried to obtain an intermediate product; (3) The intermediate product is calcined to obtain the core-shell structured manganese tetroxide. The core-shell structured manganese tetroxide of the present invention helps to solve the problems of rapid cycle decay, poor rate performance or insufficient compaction density in the sintering preparation process of lithium manganese oxide using manganese tetroxide in the prior art.

This invention belongs to the field of manganese tetroxide preparation technology, and discloses a method for preparing manganese tetroxide for drilling mud. In this invention, pyrolusite powder is subjected to a reducing leaching reaction using SO2 gas to obtain manganese sulfate leachate; then, it is mixed with a composite alkaline control solution composed of ammonia, anhydrous ethanol, and a surfactant to carry out a precipitation reaction, obtaining a spherical precursor; a catalyst and activator are then added to carry out an oxidation reaction to obtain a crude product, which is finally shaped in situ. This invention uses commercially available surfactants and, combined with specific process conditions, effectively controls the morphology of the precursor, achieving spherical particle growth and preliminary particle size control.

This invention discloses a method for recovering manganese from electric furnace ferromanganese slag, comprising the following steps: crushing and uniformly mixing the ferromanganese slag, then drying it; uniformly mixing the dried ferromanganese slag with flux, calcining it in a tube furnace until the reaction is complete, and after the temperature drops to room temperature, removing the calcined slag sample, adding deionized water to leach manganese sulfate at room temperature, filtering and separating to obtain crude manganese sulfate solution and leaching residue; adding metallic manganese powder, ammonium sulfide, and flocculant to the crude manganese sulfate solution to further remove impurities, then adjusting the pH, filtering and separating to obtain a four-stage purified manganese sulfate solution. This invention utilizes a mixed flux to sulfatate metal oxides, achieving higher sulfatation efficiency than existing technologies, accelerating the process of extracting manganese from ferromanganese slag to produce high-purity manganese tetroxide, while simultaneously solving the resource waste and environmental pollution problems caused by ferromanganese slag from electric furnaces.

This invention belongs to the fields of nanomaterial preparation, enzyme engineering, and biosensing technology. It discloses a ligand-guided in-situ synthesis of nickel-manganese hybrid nanozymes, its preparation method, and applications. Based on a MOF precursor liquid-phase in-situ evolution strategy, using 2-methylimidazole as a structure-directing agent and nucleation initiator, a controlled coordination-hydrolysis competitive reaction is induced between divalent manganese salt and divalent nickel salt in a mild aqueous system, resulting in a one-step synthesis of nickel-doped manganese tetroxide (Ni-Mn3O4) hybrid nanospheres with surface-modified organic ligands. The obtained nanozyme exhibits a uniform spherical morphology (approximately 100 nm in diameter), excellent dispersibility, and, thanks to its robust oxide framework, demonstrates superior structural stability and oxidase-like activity in an acidic catalytic environment at pH 4.0. Based on this nanozyme, a highly sensitive, wide-linear-range colorimetric screening platform for α-glucosidase inhibitors was constructed. The method of this invention is simple and environmentally friendly, requiring no high-temperature calcination.

This invention discloses a method for low-temperature manganese recovery from low-grade manganese carbonate ore. The method involves crushing, grinding, and drying the low-grade manganese carbonate ore. The dried ore is then mixed evenly with a ternary flux and heated to 120°C in a tube furnace at a rate of 5-10°C / min. After constant-temperature roasting for 55-65 minutes, the temperature is further increased to 280°C at a rate of 5-10°C / min, and roasted for another 25-35 minutes. Finally, the temperature is increased again at a rate of 8-12°C / min. The temperature is rapidly increased to 500℃, and roasting continues for 55-65 minutes. After the reaction is complete, the temperature is allowed to drop to room temperature. The roasted residue sample is then removed, and deionized water is added to leach manganese sulfate at room temperature. The residue is then filtered and separated to obtain crude manganese sulfate solution and leaching residue. This process of sulfatating metal oxides in low-grade manganese carbonate ore is more efficient than existing sulfatation technologies, accelerating the extraction of manganese from low-grade manganese carbonate ore to produce high-purity manganese tetroxide. At the same time, it solves the problems of resource waste and environmental pollution caused by low-grade manganese carbonate ore.

The application provides an amino-functionalized diatomite-supported trimanganese tetraoxide composite adsorbent and a preparation method and application thereof, and belongs to the technical field of environmental functional materials and wastewater treatment. The application takes trimanganese tetraoxide as a core adsorption component, utilizes the porous structure of diatomite to provide a limited space for the trimanganese tetraoxide, and prevents the agglomeration of nanoparticles; the amino functional group anchors manganese ions through complexation, guides the in-situ uniform growth of the trimanganese tetraoxide, and serves as a specific capture site of heavy metal ions, thereby generating a synergistic adsorption effect with the trimanganese tetraoxide; and the prepared composite adsorbent has high specific surface area, high adsorption capacity, excellent selectivity and good cycle stability, thereby providing a novel adsorption material with excellent performance, controllable cost and green process for efficient treatment of heavy metal-containing wastewater.

The present application relates to thin film magnesium battery magnesium aluminate manganese positive target material, preparation method and thin film magnesium battery, belong to magnesium battery technical field. Including: magnesium salt powder is mixed with manganese trioxide and aluminum oxide powder to obtain mixed powder; the mixed powder is put into a ball mill tank and mixed with zirconium oxide balls, then a dispersing agent is added and the mixing and ball milling are continued; then a binder is added to the ball mill tank and the ball milling is continued; the synthesized powder after ball milling is sieved through a 500 mesh sieve, the sieved synthesized powder is weighed, poured into a vibrating mold, pressed, and a molded blank is formed; the blank is put into a cold isostatic pressing machine, pressed and pressure maintained, and a magnesium aluminate manganese positive target material blank after cold isostatic pressing is obtained; the magnesium aluminate manganese positive target material blank is put into an atmosphere sintering furnace or a vacuum sintering furnace, and after multi-stage heat preservation and multi-stage cooling, the furnace is naturally cooled to room temperature, and a thin film magnesium battery magnesium aluminate manganese positive target material is obtained. The composition of the thin film magnesium battery magnesium aluminate manganese positive target material of the present application is uniform, and thin film deposition is facilitated.

The invention discloses a lithium manganate nanobelt positive electrode material with ultrahigh rate discharge and a preparation method, the general formula is LiMn2O4, the spinel structure of the lithium manganate nanobelt positive electrode material has a rapid lithium ion transmission channel, and the lithium ion transmission path is reduced due to nanobelt morphology. The preparation method comprises the following steps: S1, putting deionized water into a high-pressure reaction kettle as a base solution, then pouring the metal manganese powder into the reaction kettle, stirring to uniformly disperse the metal manganese powder, and keeping the temperature of the high-pressure reaction kettle at 20-40 DEG C in the stirring process; s2, adding hydrogen peroxide into the uniformly dispersed Mn powder solution, and maintaining the reaction temperature at 0-10 DEG C during the period; s3, after Mn powder is added, the temperature is increased to 120-180 DEG C for a reaction, after the reaction is completed, the temperature is reduced to the room temperature, deionized water is used for flushing, centrifugal treatment is conducted, powder is collected and placed in a drying box to be dried, and then manganous-manganic oxide powder is obtained; and S4, mixing Li2CO3 and Mn3O4 materials according to a ratio, carrying out high-temperature calcination treatment, and crushing to obtain a finished product of the lithium manganate nanobelt positive electrode material.

The utility model discloses a device for battery grade four manganese dioxide production preparation manganese slurry, including vertical ball mill, reation kettle, mixing jar a and mixing jar b, vertical ball mill is provided with nitrogen input pipeline, draught fan exhaust pipeline, manganese flake adding pipeline, weak alkaline pure water adding pipeline and manganese slurry output pipeline, weak alkaline pure water adding pipeline connects mixing jar a, and the communication pure water pipeline and lye pipeline are on mixing jar a, and manganese slurry output pipeline communicates with the input end of reation kettle. The device for battery grade four manganese dioxide production preparation manganese slurry and its process, through adding a certain amount of lye in the pure water of wet grinding to control the pH value in water to be weak alkaline to slow down the hydrolysis rate of metal manganese, using the relatively stable nature of the chemical properties of manganese under alkaline conditions, then cooperating nitrogen to separate oxygen, so that the wet grinding manganese slurry is not easy to oxidize, the manganese slurry is not deteriorated, the color of manganese slurry is normal, and the quality of four manganese dioxide products is not affected.

The application provides a manganese-based composite lithium supplement agent with adjustable phase structure and a preparation method and application thereof, and belongs to the technical field of lithium ion battery lithium supplement. The application provides a preparation method of the manganese-based composite lithium supplement agent with adjustable phase structure, which comprises the following steps: mixing manganese oxide and a lithium source to obtain a mixture; the manganese oxide is a mixture of any one or more of manganese sesquioxide, manganese dioxide and trimanganese tetraoxide and manganese monoxide; the mixture is pre-sintered, then solid-phase sintered, and finally crushed to obtain the manganese-based composite lithium supplement agent with adjustable phase structure. The results of the examples show that the first circle charge specific capacity (~4.8V) of the battery prepared from the manganese-based composite lithium supplement agent provided by the application can reach about 800-900 mAh / g, and the energy density of the battery is significantly improved.

The application discloses a preparation method of high-purity-phase battery-grade trimanganese tetraoxide. Pure water is firstly added into a reaction kettle and stirring is started, then ammonium salt and an additive are added and oxidation gas is introduced, then manganese powder is continuously added into the reaction kettle, the pH of the reaction liquid is controlled to be 7-9 during the feeding process, and high-purity-phase battery-grade trimanganese tetraoxide is obtained after treatment. In the application, the manganese powder is continuously added and the pH is controlled to be 7-9 during the whole reaction process, and the two technologies are combined, so that the prepared trimanganese tetraoxide does not contain needle-shaped heterogeneous phases, and pure-phase trimanganese tetraoxide is obtained.

The application discloses a kind of preparation methods and products of biological friendly spheroid-like trimanganese tetraoxide nanometer, it is related to functional nanometer material technical field;The application includes that manganese salt is mixed with ultrapure water and obtains manganese salt solution;Catalyst, modifier are added and stirred uniformly, catalyst is selected from monoethanolamine, diethanolamine, triethanolamine, modifier is selected from polyethylene glycol, sodium alginate and its derivative, chitosan and its derivative, water-soluble cellulose and its derivative;Basic solution and acidic solution are added dropwise to adjust the pH value of manganese salt solution, ultrapure water is added and stirred uniformly and poured into hydrothermal reaction kettle;Hydrothermal reaction kettle is placed in drying oven and heated to complete reaction to obtain trimanganese tetraoxide slurry;Filter, rinse and dry to obtain trimanganese tetraoxide powder product;The application effectively reduces the biological toxicity of trimanganese tetraoxide nanoparticle, meets the strict biomedical application requirement, preparation method is simple, process condition is mild, does not need expensive equipment, and cost is conducive to control.

This invention relates to the field of ferrite magnetic materials technology, specifically to a modified manganese tetroxide and its application in soft magnets. The invention provides a modified manganese tetroxide and its application in soft magnets, which utilizes electrospinning technology with polyvinylpyrrolidone as a fiber template to form a composite nanofiber material with zinc ferrite as the inner layer and manganese tetroxide and cobalt tetraoxide ferrite as the outer layer, i.e., a modified manganese tetroxide fiber material. Using this as the fiber skeleton, modified polysiloxane and silicone resin are used as encapsulating materials to construct a three-dimensional anisotropic soft magnetic composite material. This solves the contradictory problems of high eddy current loss and difficulty in simultaneously achieving saturation magnetic induction intensity and high-frequency permeability in traditional soft magnetic materials at high frequencies.

This invention provides a coal-saving agent that stabilizes and improves combustion, its preparation method, and its application, belonging to the field of coal combustion technology. The coal-saving agent provided by this invention comprises: 5-10% oxidant, 1-8% combustion improver, 5-15% catalyst, 1-5% desulfurizer, 2-4% calcium magnesium acetate, 1-4% dispersant, and the balance being water. This invention uses potassium permanganate and sodium nitrate as oxidants, which have different decomposition temperatures and can release oxygen at different temperatures and time periods, thus promoting more complete combustion of coal. It uses manganese tetroxide, cerium dioxide, and ferric chloride as catalysts, which have a synergistic effect, further promoting coal combustion and burnout. The addition of calcium magnesium acetate as an electron transfer medium lowers the activation energy, reduces the ignition temperature, and improves the burnout rate. Controlling the composition and dosage of each component enhances the coal-saving effect of the agent.

The application discloses a method for producing battery-grade trimanganese tetraoxide by using electrolytic manganese anode slime, and production is carried out according to the following method: (1) electrolytic manganese anode slime is broken and then dried; (2) the electrolytic manganese anode slime is mixed with a flux, and is roasted in a tubular furnace until the reaction is complete; the manganese sulfate is leached out by deionized water at room temperature, and is filtered to obtain leached manganese sulfate crude liquid and leaching residue; (3) a purifying reagent is added to the manganese sulfate crude liquid for purification; (4) ammonium bicarbonate is added to convert the manganese sulfate into manganese carbonate; the manganese carbonate is filtered to obtain manganese carbonate precipitate and ammonium sulfate solution; the manganese carbonate precipitate is calcined to obtain trimanganese tetraoxide; and the trimanganese tetraoxide is crushed, sand-ground, washed and dried to obtain battery-grade trimanganese tetraoxide. The manganese recovery rate can reach more than 99.3%, the energy consumption and cost are lower, and the problems of resource waste and environmental pollution caused by the manganese anode slime of electrolytic manganese manufacturers are solved.

The invention relates to a method for preparing manganous-manganic oxide by regenerating waste lithium manganate, which comprises the following steps: 1) uniformly mixing waste lithium manganate with pure water and concentrated sulfuric acid to obtain slurry; (2) carrying out solid-liquid separation on the slurry obtained in the step (1), and then drying to obtain a dried product; (3) crushing the dried product obtained in the step (2), and sintering in an inert gas atmosphere; 4, after sintering is finished, cooling is conducted to the room temperature, pure water is added, stirring and water dissolving are conducted, solid-liquid separation is conducted again, filter residues are dried, and the manganous-manganic oxide is obtained.The method is easy to operate, waste gas and high-acid and high-alkali waste water are not generated in the recycling process, the technology is environmentally friendly, the manganese content of the prepared manganous-manganic oxide can reach 71.50% or above, the manganous-manganic oxide can be directly used for producing lithium manganate, and high performance is achieved.

The application discloses a hollow polydopamine-iron coated trimanganese tetraoxide composite nanomaterial and a preparation method and application thereof. The composite nanomaterial comprises: trimanganese tetraoxide nanoparticles with a hollow structure; and a polydopamine-iron coating layer partially coated on the surface. The preparation method comprises: at least reacting a manganese source, diethanolamine and hydrogen peroxide to prepare solid trimanganese tetraoxide nanoparticles; and reacting the solid trimanganese tetraoxide nanoparticles with dopamine hydrochloride and an iron source to prepare the hollow polydopamine-iron coated trimanganese tetraoxide composite nanomaterial. The hollow polydopamine-iron coated trimanganese tetraoxide composite nanomaterial prepared by the application has a hollow structure and excellent catalytic performance and magnetic performance, can simultaneously realize T1 / T2 dual-mode imaging, can obviously kill tumor cells through a metal ion interference effect, and has a good application prospect in tumor diagnosis and treatment.

This invention belongs to the technical field of lithium iron manganese phosphate battery materials, specifically disclosing a nickel-aluminum in-situ doped manganese tetroxide and its preparation method. Based on the elemental composition of the target doped manganese tetroxide, this invention establishes an elemental doping amount control model. Based on this model, the feeding mechanism of the complexing agent and mixed salt solution can be synergistically adjusted, achieving precise matching of the stoichiometric ratio of the doping elements while obtaining doped manganese tetroxide products with large specific surface area, high tap density, and suitable uniform particle size. Furthermore, the method of this invention can achieve atomic-level uniform distribution between manganese and the doping elements, resulting in products with good doping uniformity, high product stability, and low doping element content in the reaction residue, thus exhibiting the advantage of high raw material utilization.

This invention belongs to the technical field of manganese tetroxide weighting agent preparation, specifically relating to a modified manganese tetroxide weighting agent and its preparation method. The preparation method includes the following steps: a manganese tetroxide suspension doped with iron oxide is mixed and modified with an organic modifier, followed by vacuum freeze-drying; the organic modifier includes a mixture of an oleophobic silane coupling agent and organically modified sodium sulfonate. The preparation method of the modified manganese tetroxide weighting agent provided by this invention has a relatively simple overall process, is economically efficient, and has industrial feasibility.

The application discloses a method for efficiently preparing trimanganese tetraoxide, and comprises the following steps: adding manganese sulfate solution, composite lye and hydrogen peroxide into a bottom liquid containing an ammonium salt buffer system in parallel flow, and synchronously introducing oxidizing gas; continuously stirring the reaction at 40-60 DEG C for 4-6 hours, filtering, washing and drying the precipitate generated in the reaction to obtain trimanganese tetraoxide product; wherein the reaction maintains the pH value of the reaction system in the range of 8.5-10.5 through the ammonium salt buffer system. Through the process of adding manganese sulfate solution, composite lye and hydrogen peroxide into the bottom liquid containing the ammonium salt buffer system in parallel flow, the preparation efficiency of trimanganese tetraoxide is effectively improved, the generation of intermediate manganese hydroxide can be effectively inhibited, the probability of adsorbing SO4 2‑ , NH4 + of the manganese hydroxide is reduced, the manganese content of the trimanganese tetraoxide product is improved, and the sulfur content in the product is reduced.

This invention relates to the field of cathode material technology and discloses a method for preparing carbon-coated tetramanganese lithium manganese oxide with carbon-based pore-forming capacity enhancement and low oxygen defect. The method includes: Step 1: Mixing manganese tetroxide, a lithium source, and metal oxide additives in a mixer; Step 2: Adding carbon-based materials with a particle size distribution of 0.01mm-10mm to the mixture obtained in Step 1 and mixing in a mixer for 30-60 minutes; Step 3: Loading the powder material obtained in Step 2 into a sintering crucible and performing gradient temperature heat treatment; Step 4: Dispersing the agglomerated honeycomb material obtained in Step 3 using an inclined mixer; Step 5: Performing a secondary heat treatment on the dispersed material obtained in Step 4; Step 6: Dispersing the material obtained in Step 5 to obtain carbon-coated tetramanganese lithium manganese oxide cathode material. The lithium manganese oxide cathode material prepared by this invention has uniform carbon coating, excellent conductivity, and combines advantages in production efficiency and product performance.

The application discloses a rare earth yttrium oxide and cerium oxide doped high-temperature negative temperature coefficient thermistor material and a preparation method thereof, and relates to the technical field of resistor devices.The thermistor material is composed of a thermistor material of trimanganese tetroxide, diiron trioxide, aluminum trioxide, silicon dioxide, diyttrium trioxide and cerium dioxide;the molar ratio of manganese, iron, aluminum, silicon, yttrium and cerium in the trimanganese tetroxide, diiron trioxide, aluminum trioxide, silicon dioxide, diyttrium trioxide and cerium dioxide is 0.4-0.8:0.3-0.5:0.3-0.5:0.05-0.08:0.2-0.5:0.2-0.5;the application can realize stable negative temperature coefficient characteristics in a wide temperature range of 25 DEG C-900 DEG C, greatly improves the stability and reliability of long-term use at high temperature, reduces the resistance value drift risk, guarantees the uniformity of raw material mixing through step-by-step grinding and calcination, and improves the density of the ceramic material through the parameter matching of cold isostatic pressing and high-temperature sintering, so that the air holes and structural defects are reduced.

The application discloses a method for wetly and cooperatively recovering lead and zinc from manganese fly ash and preparing trimanganese tetraoxide, valuable elements in the manganese fly ash are separated and recovered through hydrometallurgical technologies such as water immersion for salt removal, selective leaching of zinc by using dilute hydrochloric acid with a specific concentration, complex leaching of lead by using an acidic sodium chloride solution, and the like, and finally, trimanganese tetraoxide products, lead compounds and zinc compounds are obtained; the application replaces a traditional sulfuric acid system with a hydrochloric acid system, thereby avoiding adverse effects of impurity calcium sulfate on experiments; through accurate control of leaching conditions and an innovative washing process, a complex pollution problem caused by introduction of chloride ions is effectively solved, efficient and high-selectivity separation and recovery of manganese, lead and zinc are realized, a process flow is simple, product purity is high, and the application provides a comprehensive solution with economic efficiency and low carbon for recovery of the manganese fly ash.