22 results about "Potassium manganate" patented technology

This disclosure relates to a manganese-containing graphene composite material, its preparation method, and its uses. The method includes: mixing graphite, potassium permanganate, and concentrated acid, heating and reacting them, then adding water and stirring to obtain a mixed solution; mixing the mixed solution with optional hydrogen peroxide, and refluxing it under intermittent ultrasonic stirring, so that the resulting material is separated into solid and liquid phases to obtain a solid product; calcining the solid product under an inert atmosphere; the intermittent ultrasonic stirring step includes: (1) ultrasonic stirring for 5-30 min and then stopping for 10-60 min; (2) repeating step (1). The manganese-containing graphene composite material provided by this invention contains elements such as manganese, potassium, and sulfur. By refluxing under intermittent ultrasonic stirring, this invention enables the manganese-containing graphene composite material to have a large specific surface area, exhibiting excellent performance in reactions such as the removal of sulfur-containing compounds. On the other hand, the content of manganese ions and other substances in the wastewater is significantly reduced during the preparation process, effectively solving the problem of wastewater discharge pollution.

The application discloses an anti-wear and friction-reducing agent for a humanoid robot lubricating grease and a preparation method thereof, and particularly relates to the technical field of lubricant materials, and the anti-wear and friction-reducing agent is a composite material formed by in-situ growth of amorphous manganese oxide two-dimensional sheets on the surface of carbon nanotubes; the XRD pattern of the amorphous manganese oxide presents characteristic diffraction peaks of the carbon nanotubes and amorphous packages, and does not present characteristic diffraction peaks of crystalline manganese oxide; the selected area electron diffraction presents a diffuse halo ring, and is chemically bonded with the carbon nanotubes through Mn-O-C. The preparation method comprises the following steps: dispersing the carbon nanotubes in deionized water, adding a potassium permanganate solution, stirring and reacting at room temperature for 2-5 min, not adding an additional reducing agent, only using the carbon nanotubes as a reducing agent, and then performing centrifugation, washing and drying. The anti-wear and friction-reducing agent has excellent shear stability, significantly improves the anti-wear and friction-reducing performance of the lubricating grease, and has the advantages of simple process, rapidness, low cost and suitability for applications such as humanoid robot joints.

The application provides a hydrogen bond driven high signal-to-noise ratio dual-response signal ratio fluorescence self-assembly system and a potassium permanganate detection method thereof. The inherent local acid microenvironment of the system enhances the oxidation reaction activity of potassium permanganate. Based on the etching effect of potassium permanganate on the zinc-sulfur bond of quantum dots, the fluorescence of the quantum dots is quenched. The oxidation and hydrolysis effect of the acrylate bond in the probe 6-aldehyde-naphthyl acrylate brightens the fluorescence. The dual-response signal ratio fluorescence detection of potassium permanganate is realized by combining the torsional intramolecular charge transfer and the photoinduced electron transfer mechanism. With the increase of the concentration of potassium permanganate, the fluorescence emission peak of the system at 639 nm gradually decreases, the fluorescence emission peak at 521 nm gradually increases, and the fluorescence color changes from red to green. The response time is less than 1 second, and the solution state detection limit is as low as 4.80 nM. The solid-state sensing material prepared by loading the system on a polyacrylamide gel can realize the on-site visual detection of picogram-level potassium permanganate solid particles, and the detection limit is as low as 128 picograms. Moreover, the system has high specificity and high signal-to-noise ratio.

This invention discloses a lanthanum-based perovskite-supported noble metal catalyst, its preparation method, and its application in the catalytic oxidation of low-carbon alkanes. The invention involves dissolving lanthanum salt, manganese salt, and citric acid in an organic solvent to prepare a metal cation solution, which is then stirred to obtain a sol. After standing, a wet gel is obtained; this gel is dried and heat-treated to obtain lanthanum-based perovskite. A non-noble metal salt is dissolved in an acidic potassium permanganate solution to prepare a mixed solution. The lanthanum-based perovskite is dispersed in the mixed solution, heated, filtered, washed, and heat-treated. The pretreated lanthanum-based perovskite is dispersed in a noble metal salt solution, allowed to stand, dried, and heat-treated to obtain the target catalyst. This invention introduces active components in situ through acidic potassium permanganate pretreatment, resulting in a high specific surface area and highly active support, improving the dispersion of noble metals and promoting the interaction between noble metals and the support. The catalyst of this invention exhibits excellent catalytic combustion performance for low-carbon alkanes such as ethane and propane, and strong thermal stability.

This invention discloses a method for determining the permanganate index based on modified biochar adsorbents, comprising the following steps: Step 1, modifying the biochar with a modifying solution. When the concentration of the modifying solution is 0.1 mol / L, an acidic modifier is used to modify the biochar adsorbent; when the concentration of the modifier solution is 0.2~0.4 mol / L, a salt modifier is used. Step 2, thoroughly shaking and mixing the modified biochar adsorbent with a water sample, adding sulfuric acid solution to acidify the water sample, adding potassium permanganate solution to the acidified water sample and heating the reaction, adding sodium oxalate solution after heating, shaking until the solution becomes colorless and without precipitate, titrating with potassium permanganate solution while hot until a light pink color appears and does not fade within a fixed time, recording the volume of potassium permanganate solution consumed, and calculating the potassium permanganate index. The type and concentration of the modifier used in this invention have a significant impact on the adsorption performance of biochar.

This invention belongs to the field of electromagnetic wave absorbing materials technology, specifically relating to an absorbing material, its preparation method, and its application. This invention uses multi-walled carbon nanotubes (MWCNTs), potassium permanganate (KMnO4), and divalent manganese as raw materials, based on Mn... 2+ With MnO4 ‑ The redox reaction between the two components allows for in-situ uniform loading of MnO2 nanoparticles onto the MWCNT surface through simple stirring in a room-temperature liquid environment, resulting in microwave absorption performance superior to most similar absorbing materials. Compared to traditional methods for preparing absorbing materials, the technical route of this invention offers significant advantages, including simple preparation process, no pollutant emissions, energy-saving and environmentally friendly process, adjustable and controllable material structure, excellent microwave absorption performance, and scalability. This method effectively overcomes the technical limitations in the preparation of absorbing materials, providing a scalable new paradigm for the green and large-scale production of high-performance absorbing materials.

The application relates to the technical field of alumina ball preparation, in particular to a preparation method of high-strength potassium permanganate alumina ball, which comprises the following steps: S1. adding an aluminum salt into deionized water to obtain an aluminum salt solution; S2. adding lye into the aluminum salt solution to adjust pH to obtain an aluminum hydroxide slurry; S3. preparing a silicic acid sol; S4. adding the silicic acid sol obtained in the step S3 into the aluminum hydroxide slurry obtained in the step S2, then adding modified polyethylene glycol, and performing ball milling to obtain a mixed liquid; S5. dropping the mixed liquid in the step S4 into an oil ammonia column to obtain alumina balls; and S6. adding potassium permanganate and modified polyethylene glycol into deionized water, stirring at room temperature for 10-20 min, then adding the alumina balls obtained in the step S5, and performing ultrasonic immersion to obtain potassium permanganate alumina balls. The prepared potassium permanganate alumina ball has high strength, high potassium permanganate loading capacity and good purification effect.

This invention relates to a potassium permanganate compound agent for improving the utilization efficiency of active intermediate manganese and its application, belonging to the field of wastewater treatment. The invention addresses the problem of low utilization efficiency of active intermediate manganese in existing potassium permanganate agents. The potassium permanganate compound agent of this invention for improving the utilization efficiency of active intermediate manganese comprises potassium permanganate and a nitrogen-containing ligand. The nitrogen-containing ligand can form complexes or undergo surface interactions with manganese species of different valence states generated during the reaction, thereby stabilizing Mn(III), regulating the structure, dispersion state, and electron transfer behavior of Mn(IV), and promoting the cyclic transformation of manganese between different valence states, thus improving the utilization efficiency of active intermediate manganese species and the oxidation capacity of the potassium permanganate system. The potassium permanganate compound agent of this invention has advantages such as high utilization efficiency of active intermediate manganese species, strong oxidation capacity, wide applicability, and recyclability.

This invention belongs to the field of heparin sodium extraction technology, specifically involving a method for graded extraction of chondroitin sulfate B, heparan sulfate and heparin sodium. It consists of the following steps: (1) dissolving crude heparin in deionized water, centrifuging to remove insoluble matter from the heparin solution, and taking the supernatant to obtain crude heparin solution; (2) adjusting the pH of the crude heparin solution from step (1) to 8-9, then adding A98 resin, and adsorbing at 60-62℃; (3) using NaCl solution to elute the resin adsorbed in step (2) twice, then adding anhydrous ethanol three times for precipitation, collecting the precipitate, adjusting the pH to 9-10, adding potassium permanganate solution at 75-80℃ for oxidization for 30-40 min, filtering with diatomaceous earth, taking the filtrate, adding anhydrous ethanol to the filtrate for precipitation, and drying to obtain heparan sulfate; this invention has a high extraction rate and good extraction effect, and can also extract heparan sulfate and heparin sodium during the extraction of chondroitin sulfate B.

The application discloses a kind of manganese dioxide supported monatomic silver catalyst and preparation method of positive electrode film, comprising the following steps: S1.the potassium permanganate of a certain mass, manganese sulfate monohydrate and silver nitrate are mixed with deionized water respectively to prepare solution with different concentrations;S2.manganese sulfate monohydrate solution is added to potassium permanganate solution and is magnetically stirred, in the process of stirring, add conductive carbon black, after uniform mixing, obtain mixed solution A;S3.continuously keep the magnetic stirring speed of S2, and drop silver nitrate solution to mixed solution A to obtain mixed solution B;S4.mixed solution B is transferred to reaction kettle and is hydrothermally reacted, after reaction, the substance is centrifuged, and precipitate is obtained, after drying and grinding, catalyst MnO2 / C-Ag is obtained, i.e.manganese dioxide supported monatomic silver catalyst.The application can realize that silver monatomic atom is uniformly dispersed on the surface of manganese dioxide, silver monatomic atom and carrier interact strongly, and preparation process is simple, and cost is low.

The application discloses a kind of based on non-complex state manganese oxidation technology's reclaimed water preparation method, it is related to reclaimed water preparation technical field, including following material: phosphate buffer, potassium permanganate, ferrous sulfide, modified chitosan, modified polyaspartic acid, glutamic acid diacetic acid tetrasodium;The application maintains water quality alkaline environment by adding phosphate buffer, greatly inhibits the risk of toxic gas generated by ferrous sulfide hydrolysis, guarantees the safety of preparation process;The modified chitosan added, by electric neutralization and adsorption bridging, small precipitate is quickly flocculated into sedimentable alum flower, realizes mud-water separation;By adding modified polyaspartic acid, can prevent the scale formed by precipitation in irrigation pipeline or equipment, and glutamic acid diacetic acid tetrasodium synergistic effect, jointly ensure the chemical stability of reclaimed water in storage and conveying process, protect irrigation system, water quality long-term stability.

The present application relates to the technical field of biodiesel synthesis, and particularly relates to a molybdenum trioxide loaded reduced graphene oxide catalyst and a preparation method and application thereof, the preparation method comprising the following steps: mixing graphite powder, concentrated sulfuric acid and potassium permanganate to perform oxidation treatment, adding hydrogen peroxide to continue the reaction after the reaction is completed, and performing calcination on the graphene oxide product under the protection of a nitrogen atmosphere to obtain reduced graphene oxide; ammonium molybdate is calcined in a muffle furnace to obtain molybdenum trioxide, the obtained molybdenum trioxide and the reduced graphene oxide are compounded through a coprecipitation method, and are subjected to ultrasonic dispersion, stirring and mixing and drying treatment to obtain the molybdenum trioxide loaded reduced graphene oxide catalyst. The catalyst prepared by the present application is a solid catalyst, can be used for catalyzing the transesterification reaction of waste soybean oil to synthesize biodiesel, has no equipment corrosion, the product is easy to separate, the process is environmentally friendly, can be recycled, has a lower cost, and has a good industrial application prospect.

This disclosure relates to a method for preparing a manganese-based adsorbent material and a method for hydrogen desulfurization. The method includes: S1, mixing potassium permanganate and graphite in the presence of concentrated acid to carry out an oxidation reaction, and performing solid-liquid separation on the resulting material to obtain a filter stock and graphite oxide; S2, refluxing the mixture containing the filter stock and optional hydrogen peroxide in an open system and recovering the solid phase material; wherein the mass ratio of potassium permanganate to graphite is 7.5 or higher. The method provided by this disclosure eliminates the need to add an additional manganese source during the preparation of the manganese-based adsorbent material, effectively reducing the preparation cost of the manganese-based adsorbent material. When the manganese-based adsorbent material prepared by this disclosure is used in a hydrogen desulfurization reaction, it exhibits excellent performance, effectively removing macrosulfides from hydrogen at temperatures below 60°C. The desulfurized hydrogen can be directly used for hydrogen supply in fuel cells.

This invention relates to a method for preparing modified biochar sulfur-fixing materials and their application in adsorbing sulfur dioxide from flue gas. The purpose of this invention is to address the problem of low efficiency in the absorption of sulfur dioxide by existing activated carbon. The method involves an alkaline leaching preparation: 1. Saccharification treatment by adding concentrated sulfuric acid to straw powder to obtain black, lumpy saccharified material; 2. Calcination and carbonization treatment; 3. Immersion of biochar in NaOH solution to obtain alkaline-modified biochar; 4. Grinding the alkaline-modified biochar in a mortar with potassium permanganate powder. This invention also relates to a method for preparing ultraviolet magnetic modified biochar sulfur-fixing materials, which involves irradiating biochar under ultraviolet light, then mixing the ultraviolet-modified biochar with iron tetroxide, and finally calcining it in a furnace. The preparation methods of these two modified biochar sulfur-fixing materials are simple and reliable, using readily available straw raw materials, realizing the utilization of straw waste, and improving the adsorption rate of sulfur dioxide in flue gas.

This disclosure relates to a graphene oxide-based composite material, its preparation method, and its uses. The method includes: S1, mixing graphite, potassium permanganate, and a strong oxidizing acid to obtain a mixture; S2, heating the mixture, and then subjecting the heated material to microwave calcination. The preparation method of this disclosure uses a microwave calcination process to reduce graphene oxide. No water is added during the entire preparation process, thus avoiding wastewater discharge and NO emissions. x To address a range of issues, including emissions, the resulting redox graphene-based composite material exhibits excellent desulfurization performance.

This invention relates to the field of gas adsorption materials technology, and particularly to renewable MOF-based gas adsorption materials, their preparation methods, and applications. Starting with 1,3-xylene, this invention utilizes a multi-step synthetic pathway involving Friedel-Crafts alkylation, potassium permanganate oxidation, regioselective nitration, iron powder reduction, and diazotization-methoxylation to prepare the bifunctional organic ligand 2-tert-butyl-5-methoxy-1,3-phthalic acid, which possesses a hydrophobic tert-butyl group and a hydrogen bond acceptor methoxy group. A solvothermal method with alkali-modified solution is employed to achieve in-situ coordination assembly of the aluminum metal salt and the bifunctional ligand. By precisely controlling the pH and temperature of the reaction system, an Al-MOF-TBOMe material with a one-dimensional pore structure, a hydrophobic microenvironment, and specific recognition sites is finally obtained. This material exhibits high efficiency in adsorbing isopropanol, stable hydrophobic properties, and high reversibility with isopropanol.

This invention proposes an online monitoring method for total arsenic in water, comprising the following steps: mixing a water sample with a potassium persulfate aqueous solution and heating to digest it, oxidizing all forms of arsenic to pentavalent arsenic; adding sulfuric acid and tartaric acid to the digestion solution to adjust the pH to 12, and adding ascorbic acid and potassium iodide to complex copper ions, adding potassium borohydride to generate arsine, and purging with air to remove the arsine; introducing the arsine into an iodine and potassium iodide aqueous solution to oxidize it to arsenate, then adding ammonium molybdate to generate arsine molybdenum heteropolyacid, and again adding ascorbic acid and potassium iodide to reduce it to molybdenum blue; measuring the absorbance and plotting a standard curve to calculate the total arsenic content. By using an iodine-potassium iodide solution as the arsine absorption solution, the absorption efficiency and stability are superior to conventional acidic potassium permanganate solution; simultaneously, tartaric acid masks antimony ions, and ascorbic acid and potassium iodide synergistically complex copper ions, effectively eliminating Sb. 3+ / Cu 2+ Interference can be eliminated to achieve accurate online monitoring of total arsenic in water.

The application discloses a copper-doped active manganese catalyst, a preparation method thereof and application of the catalyst in fruit preservation, and relates to the field of fruit preservation. The preparation method of the copper-doped active manganese catalyst comprises the following steps: selecting a cheap manganese ore, stirring and dissolving the manganese ore in an ascorbic acid solution, filtering to obtain a low-valence manganese-containing filtrate; adding the low-valence manganese-containing filtrate into a potassium permanganate solution, stirring and reacting at 70-90 DEG C for 12 hours, and filtering to obtain a brown precipitate; preparing a copper sulfate solution with a pH of 4-6, adding the brown precipitate, and stirring and reacting for 12 hours. After the reaction, the mixture is cooled and filtered, and the powder is obtained after drying at 150-160 DEG C; the powder is shaped into particles to obtain the catalyst. Through the doping of copper elements, the catalytic activity of manganese dioxide is significantly enhanced, so that the catalyst can actively and efficiently remove various key factors causing fruit decay and aging; the catalyst is applied to fruit preservation at room temperature, has a long service life, does not directly contact the fruit, and is safe and healthy.

The application discloses a chiral manganese-based nanomaterial based on a ribose ligand and a synthesis method thereof, and belongs to the technical field of nanomaterial synthesis and self-assembly. The chiral manganese-based nanomaterial based on the ribose ligand is a chiral adjustable nanoparticle formed by self-assembly of raw materials including a chiral ligand, CTAB and potassium permanganate under alkaline conditions. The synthesis method is simple, the chiral optical performance is good, and the chirality is adjustable; by changing the configuration and the added amount of the ribose raw material, the chiral structure and the circular dichroism signal of the obtained chiral nanoparticle can be adjusted, and the method has important significance for developing more chiral materials.

This invention generally relates to a method for the reduction of elemental sulfur content in gypsum, and by extension, products that are derived from it such as gypsum wallboard. More specifically, and in one embodiment, this invention relates to using the effectiveness of potassium permanganate or sodium permanganate in reducing elemental sulfur content in a gypsum wallboard or its precursor materials.

This invention belongs to the fields of organic chemistry, medicinal chemistry, and pharmacology, specifically relating to the synthesis of lometapeptide bioelectron isosteres and their application in the preparation of therapeutic drugs for lipid-lowering diseases. A method for preparing lometapeptide bioelectron isosteres mainly includes six steps: 1) Using A and B as starting materials, under nickel catalysis and the action of phosphine ligands, a reaction occurs... endo The reaction [2+2] yielded intermediate I; 2) Intermediate I underwent intramolecular cyclization under thioxanthracene-9-one and photocatalysis to yield intermediate II; 3) Intermediate II was oxidized under alkaline potassium permanganate to yield intermediate III; 4) Intermediate III and C reacted under the action of a condensing agent to prepare amide intermediate IV; 5) Intermediate IV was debenzylated under the action of palladium on carbon and a hydrogen source to prepare amine intermediate V; 6) Intermediate V and D under alkaline conditions underwent a substitution reaction to obtain the final product, lometapetine bioelectron isostere VI. This bioelectron isostere can dose-dependently inhibit the secretion of apolipoprotein B in HepG2 cells and exhibits good kinetic solubility. This compound shows promise for development as a therapeutic drug for hypercholesterolemia-related diseases.

The application belongs to the field of battery materials, and particularly relates to a lanthanum-doped manganese dioxide nanowire material and a preparation method and application thereof. The preparation method comprises the following steps: S1, dissolving manganese sulfate and a soluble lanthanum salt in deionized water to form a uniform solution A by stirring at room temperature; S2, dissolving potassium permanganate in deionized water to form a solution B; S3, slowly dropping the solution B into the solution A, and continuously stirring to obtain a mixed solution C; S4, adding appropriate dilute sulfuric acid to adjust the pH to obtain a mixed solution D; S5, ultrasonic treatment; S6, loading the mixed solution D into a polytetrafluoroethylene reaction kettle, sealing, and placing in an oven to perform a hydrothermal reaction; S7, cooling to room temperature after the reaction is completed, repeatedly cleaning with alcohol and deionized water, and centrifugally collecting the product to obtain the lanthanum-doped manganese dioxide nanowire material. The material is applied in a water-based zinc ion battery as a positive electrode material, can simultaneously improve the intrinsic electrical conductivity and structural stability, and the developed water-based zinc ion battery has good performance and a long service life. The preparation process is simple, the cost is low, the yield is high, and the industrial production and application potential are huge.