1708 results about "Potassium hydroxide" patented technology

The invention discloses an alkaline battery capable of improving low-temperature discharge performance and a preparation method thereof, and the preparation method comprises the following steps: S1, preparing a positive electrode ring: preparing a positive electrode material from metal-doped composite manganese dioxide, an adhesive and a potassium hydroxide solution; s2, preparing negative electrode zinc paste, mixing and ball-milling nano zinc powder, indium powder and gallium powder into alloyed zinc powder, adding a composite conductive additive, a composite binder and a low-temperature-resistant additive, and stirring and dispersing to form the negative electrode zinc paste; s3, sleeving the positive electrode ring into the steel shell, inserting a diaphragm and injecting electrolyte; and S4, injecting negative electrode zinc paste, and packaging to obtain a finished product. According to the negative electrode zinc paste, the zinc utilization rate can be increased through nano zinc powder alloying, meanwhile, the freezing point is reduced through the low-temperature-resistant additive, and the reaction efficiency and fluidity of the negative electrode zinc paste at the low temperature are improved; ethylene glycol in the electrolyte is combined with nano zirconium dioxide, so that the stability and the ion migration capability can be improved, the discharge performance of the alkaline battery under a low-temperature working condition is improved, and the service life of the alkaline battery under the low-temperature working condition is prolonged.

The invention provides analcime based on alkali grinding activation as well as a preparation method and application of the analcime. The preparation method of analcime comprises the following steps: S1, providing lithium slag; s2, ball-milling the solid material and water together to obtain a ball-milled product; the solid material comprises the lithium slag and an alkaline auxiliary material, and the alkaline auxiliary material comprises one or more of sodium hydroxide and potassium hydroxide; s3, mixing the ball-milled product with an alkaline solution to obtain a to-be-treated solution; performing hydro-thermal treatment on the to-be-treated liquid to obtain reaction liquid; and S4, carrying out solid-liquid separation on the reaction liquid to obtain a solid isolate containing analcime. The analcime with high crystallinity and high yield can be obtained, a new way is provided for preparation of the analcime, and a new way is also provided for resourceful treatment of the lithium slag.

The invention discloses magnetic modified biochar, a preparation method and application of the magnetic modified biochar to adsorption of micro-plastics, and belongs to the technical field of biochar. The method comprises the following steps: pretreating industrial hemp straws, pyrolyzing at 700 DEG C in a nitrogen atmosphere to obtain original biochar, activating with potassium hydroxide, and continuously pyrolyzing in the nitrogen atmosphere to obtain activated biochar powder; soaking the obtained activated charcoal powder in an iron nitrate nonahydrate solution, mixing and stirring, drying and pyrolyzing, washing and drying to obtain the magnetic modified charcoal. Compared with traditional biochar, after the activated biochar is subjected to impregnation-pyrolysis treatment, Fe < 3 + > is introduced into the formed magnetic modified biochar, so that the specific surface area, the pore diameter, the adsorption performance and the magnetism are improved; meanwhile, in the application process of adsorbing the micro-plastics, a magnet can be used for separating the magnetic modified charcoal adsorbent from the micro-plastics, and the effects of recycling and cyclic regeneration are achieved.

The invention discloses a humic acid liquid fertilizer and a preparation method and application thereof, and belongs to the technical field of liquid fertilizers, organic waste and ferric oxide are ball-milled and mixed, transferred into a muffle furnace, roasted for 2-2.5 h at 280-310 DEG C under nitrogen protection, transferred into a reaction kettle and stirred and mixed with a 10 wt% hydrogen peroxide aqueous solution and potassium hydroxide powder, and the humic acid liquid fertilizer is obtained. The preparation method comprises the following steps: adding potassium humate into a potassium humate solution, extracting for 40-60 minutes under the assistance of ultrasonic waves, filtering to obtain a potassium humate extract and filter residues, transferring the potassium humate extract into a stirring kettle, adding urea, dipotassium phosphate, a composite carbon dot lubricant and a suspension stabilizer into the stirring kettle, and uniformly mixing to obtain the humic acid liquid fertilizer. The suspension stabilizer can reduce the generation of flocculation and crystallization in the liquid fertilizer, and through the antifriction and lubrication effects of the composite carbon dot lubricant, the friction force between indissolvable solids and water outlet holes of the drip irrigation equipment is reduced, and the risk of blockage of the drip irrigation equipment is reduced.

The invention relates to the technical field of preparation of surfactants, in particular to a PPO / PEO block Gemini ductile surfactant suitable for high-temperature and high-salt oil reservoirs and a preparation method of the PPO / PEO block Gemini ductile surfactant. The preparation method comprises the following steps: by taking fatty alcohol as an initial raw material, carrying out gradual addition on the fatty alcohol, propylene oxide (PO) and ethylene oxide (EO) through a potassium hydroxide / 18-crown ether-6 catalytic system to prepare an APOnEOm intermediate; the preparation method comprises the following steps: carrying out esterification with a polyethylene glycol bismaleate connecting group, and finally sulfonating with sodium hydrogen sulfite to obtain polyethylene glycol bismaleate diester sodium sulfonate (T-APOnEOm-S). By regulating and controlling the PPO / PEO block ratio, the product has excellent temperature resistance and salt resistance, is suitable for high-temperature and high-salt oil reservoirs, has strong emulsifying capacity, can reduce the oil-water interfacial tension to 10 <-3 > mN / m level, and remarkably improves the oil recovery rate. The preparation process is mild in condition and adjustable in product performance, and has important application value in the field of tertiary oil recovery.

The invention discloses a method for preparing a supercapacitor electrode through high-temperature alkali activation. The method comprises the steps of preparing porous carbon, preparing an electrode plate, preparing a supercapacitor, and carrying out electrochemical performance testing and material characterization testing. When the carbon precursor of the supercapacitor electrode material is prepared, organic components in walnut shells can be refined and removed and biochar is left by utilizing the effect of removing organic matters in biomass at high temperature of a tubular furnace; the potassium hydroxide with different concentrations is used as the activating agent to activate the biochar, the porosity and the internal structure richness of the porous carbon can be greatly improved, and compared with traditional solid alkali activation, the aqueous solution alkali activation has the advantages that the reliability and the possibility are improved, and the contact area of the activating agent and substances is increased. The electrode material prepared by the method has the advantages of low manufacturing cost, small environmental pollution and excellent service life, and is an ideal electrode material.

The invention belongs to the field of lithium battery electrode materials, and particularly relates to a silicon-carbon negative electrode material based on spherical starch porous carbon and a preparation method of the silicon-carbon negative electrode material. The preparation method comprises the following steps: carrying out esterification reaction on plant starch and an esterifying agent, carbonizing, crushing, activating with potassium hydroxide, pickling, and carrying out a vapor deposition silane technology to further prepare the silicon-carbon negative electrode material. The starch subjected to esterification reaction is used as a precursor, porous carbon is prepared through carbonization, activation and the like, the silicon-carbon negative electrode material is prepared through the vapor deposition silane technology, and the silicon-carbon negative electrode material not only has a spherical porous carbon skeleton, is low in volume effect and good in conductivity, but also is high in first charge and discharge capacity and first efficiency.

The invention provides a method for detecting the concentration of phosphite ions in a natural water medium, which comprises the following steps: detecting a to-be-detected sample solution containing phosphite ions and impurity ions by using an ion chromatograph to obtain a chromatogram of the to-be-detected sample; determining a peak area value of phosphite ions from the chromatogram of the sample to be detected; obtaining the concentration of the phosphite ions in the sample to be detected according to a linear regression equation of the peak area value of the phosphite ions and the concentration of the phosphite ions; wherein the test conditions of the ion chromatograph are as follows: an anion exchange column is selected as a chromatographic column, and the column temperature is 43-56 DEG C; the leacheate is a potassium hydroxide solution, the flow rate is 1.0-2.0 mL / min, gradient leaching is adopted, and the concentration of the leacheate is 15-18 mM within the time period of 0-14 min; the concentration of the leacheate is 33-36 mM within the time period of 16-30 min; the concentration of the leacheate is 17 to 20 mM within the time period of 32 to 36 minutes.

The invention provides a method for recovering waste etching liquid containing phosphoric acid, acetic acid and nitric acid, which comprises the following steps: carrying out reduced pressure distillation on the waste etching liquid under a reduced pressure condition, distilling and condensing light components of nitric acid and acetic acid to obtain mixed acid liquor of acetic acid and nitric acid, and detecting the content of nitric acid, acetic acid and water in the mixed acid liquor; adding sodium hydroxide or potassium hydroxide and the like into mixed acid liquor of acetic acid and nitric acid, so that all nitric acid in the mixed acid liquor generates nitrate; and adding acetic anhydride into the acetic acid-containing mixed solution, fully reacting, filtering the separated salt, adding an extracting agent into the filtrate, and collecting the high-purity acetic acid. According to the method, phosphoric acid, acetic acid and nitrate in the waste etching liquid are recycled, the recycled acetic acid is high in purity, high in recycling rate and high in operability, large-scale production can be met, resource recycling is achieved to the maximum extent, direct emission of non-phosphorus resources of the waste etching liquid is avoided, and resource waste and environmental pollution are avoided.

The invention relates to the field of preparation methods of activated carbon, in particular to a preparation method of biomass activated carbon with a high specific surface area. The method comprises the following steps: S1, cleaning and drying a biomass raw material, then crushing and sieving to obtain powder with uniform granularity, and then grinding and fully mixing the powder with an activator potassium hydroxide to obtain mixture powder; s2, putting the corundum crucible filled with the mixture powder into a tubular furnace, and carrying out two-stage uninterrupted programmed heating and heat preservation in a nitrogen atmosphere; then naturally cooling to room temperature to obtain a crude product of biomass activated carbon; and S3, carrying out acid pickling on the crude product of the biomass activated carbon until a cleaning solution is neutral, and finally drying a solid sample. According to the method, the technological process is simplified, the preparation time is shortened, and the biomass activated carbon with the high specific surface area can be synthesized on a large scale. The method can be applied to industrial production of natural gas or methane storage adsorbents of the ANG technology.

To provide a novel production technique of hydrogen which uses biological resources-derived matters such as an organic compound and plant biomass as raw materials.SOLUTION: A solid-containing mixture formed by mixing a solid or liquid first organic raw material made of an organic compound, and a second solid raw material made of solid alkali metal hydroxide is held at a prescribed temperature of 20°C to 300°C to generate hydrogen from the solid-containing mixture. A solid state mixture formed by mixing a first solid raw material derived from plant biomass or microorganism, and a second solid raw material made of solid alkali metal hydroxide is held at a prescribed temperature of 20°C to 300°C to generate hydrogen from the solid state mixture. Woody biomass is exemplified as the plant biomass. Wood fragments, wood chips, saw dust, wood flour, cellulose, lignin sulfonic acid or a salt thereof, and glucose are exemplified as the first solid raw material. Sodium hydroxide and potassium hydroxide are exemplified as the alkali metal hydroxide.SELECTED DRAWING: None

The invention discloses a preparation process of a waste concrete recycled aggregate gypsum-based wall material, which comprises the following steps: (1) mixing a water repellent agent with an anhydrous solvent to obtain a pretreating agent, and then adding concrete recycled aggregate for standing; and separating out the recycled aggregate and drying the recycled aggregate to obtain the pretreated recycled aggregate. (2) calcining the magnesium oxide whisker, and then adding the obtained calcined whisker into an ethanol solution of polyethylene glycol to form a suspension; and spraying the suspension on the continuously stirred pretreated recycled aggregate, and then carrying out heating and stirring treatment to obtain the modified recycled aggregate. And (3) uniformly stirring ardealite powder, silica fume, potassium hydroxide powder and fine aggregate, then adding water, a retarder and a water reducing agent, uniformly stirring, then adding the modified recycled aggregate, and uniformly stirring, thereby obtaining the product. The process provided by the invention not only reduces the adverse effect of the recycled aggregate on the gypsum-based material, but also improves the water resistance of the gypsum-based material and enhances the mechanical strength.

The invention provides phosphorus-doped hydrothermal synchronously-activated hierarchical pore green biochar, a preparation method thereof and application of the phosphorus-doped hydrothermal synchronously-activated hierarchical pore green biochar in formaldehyde adsorption, and belongs to the technical field of biomass resource high-value utilization and air pollution control. The preparation method comprises the following steps: mixing a biomass raw material with a phosphoric acid catalyst, carrying out hydrothermal carbonization reaction, carrying out solid-liquid separation on a reaction product after the reaction is finished, collecting a solid-phase material, drying, mixing with potassium hydroxide, activating, washing and drying the obtained product, and thus obtaining the phosphorus-doped hydrothermal synchronously-activated hierarchical porous green charcoal. Phosphoric acid is introduced in the hydrothermal stage to serve as a structure-directing agent and a doping source, uniform doping of phosphorus and coordinated regulation and control of a pore structure are achieved, a hierarchical pore channel system is formed in the subsequent activation process, and the physical adsorption and chemical fixation capacity of the biochar to formaldehyde molecules is greatly improved.

The invention relates to the technical field of iron ore tailing resource utilization, in particular to a method for preparing iron oxide yellow by leaching iron ore tailings through an advanced oxidation technology, which comprises the following steps: adding a required amount of iron ore tailing powder into a persulfate solution, stirring to react, adding a reducing agent, boiling, filtering, adding alkali liquor to adjust the pH value, and filtering, thereby obtaining the iron oxide yellow. Pure liquid containing ferrous ions is obtained; taking part of the pure solution containing ferrous ions, and adding a potassium hydroxide solution to obtain an iron oxide yellow seed crystal solution; adding a pure solution containing ferrous ions into the iron oxide yellow seed crystal solution, adding an alkali solution to adjust the pH value, reacting, and separating and drying a product to obtain the iron oxide yellow. According to the method, the persulfate is adopted to leach iron from the iron ore tailings, and the iron oxide yellow is prepared from the leachate; harmless treatment of the iron ore tailings and value-added utilization of valuable resources are achieved, the raw material source of the iron oxide yellow industry is widened, and a wider prospect is provided for development of iron oxide yellow.

The present invention discloses a method for preparing a carbon aerogel material used as a silicon-carbon negative electrode. The method uses phenolic resin as the main raw material and adjusts the pore structure distribution of the carbon aerogel through sol-gel, crushing, drying, grading, carbon activation, impurity removal, grinding and other steps to control the impurity content, ash content, moisture content and particle size distribution, so as to meet the requirements for the use of carbon aerogel in the field of silicon-carbon negative electrodes. The prepared carbon aerogel material has a specific surface area of ​​1000 to 3000 m 2 / g, pore volume is 0.3~2cm 3 / g, with an average pore size of 0.5-10nm and a micropore ratio of 30%-100%, making it a porous carbon matrix material for silicon-carbon anodes. The present invention uses phenolic resin, formaldehyde, potassium hydroxide, and other ingredients as its primary raw materials, resulting in low costs. The materials are graded prior to carbon activation, ensuring controllability and consistency during activation. Furthermore, the impurity removal process is simple, and the overall process is highly efficient, facilitating the large-scale production of carbon aerogel materials.

The present invention relates to the technical field of coatings and discloses a method for preparing an EVA waterproof coating. Activated montmorillonite reacts with toluene diisocyanate to obtain isocyanate-modified montmorillonite. EVA is hydrolyzed under the catalysis of potassium hydroxide to obtain hydroxylated EVA. An epoxy trisiloxane intermediate reacts with terephthalic acid under ring-opening esterification with benzyltriethylammonium chloride to obtain p-hydroxytrisiloxane benzoate. P-hydroxytrisiloxane benzoate, hydroxylated EVA, and isocyanate-modified montmorillonite are cross-linked with toluene diisocyanate under the catalysis of stannous octoate, and a defoamer and a dispersant are added thereto and stirred uniformly to obtain an EVA waterproof coating. The EVA waterproof coating prepared by the present invention has good mechanical properties and waterproof properties.

The invention relates to the field of oil field treatment agents, in particular to a petroleum antibacterial clay stabilizer and a preparation method thereof, and solves the problems that in the prior art, a clay stabilizer is easy to separate from intermolecular layers of clay, a micromolecular clay stabilizer is poor in adhesion, and a macromolecular stabilizer is difficult to act on the intermolecular layers of the clay. The antibacterial clay stabilizer is obtained by mixing a slow-release neutralization solution and a stable factor solution, wherein the slow-release neutralization solution comprises polyvinylpyrrolidone, cationic metal release particles and a reducing agent; the stable factor liquid comprises stable factors, deionized water, glacial acetic acid, polyether polyol and a potassium hydroxide solution; the clay stabilizer disclosed by the invention not only can be conveniently inserted into clay layers with relatively small molecular weight, but also can effectively and stably retain colloidal molecules due to strong hydrophobicity of an external long chain, so that metal cations are stably and slowly released, and the anti-swelling effect of clay is enhanced.

The invention discloses a production method of nano-silicon composite fireproof glass, which comprises the following steps: compounding amino nano-silicon dioxide with a modified zinc-aluminum flame retardant to prepare a coated silicon-based filler, and compounding the coated silicon-based filler with nickel-titanium bimetal MOF to obtain a composite silicon-based flame-retardant filler; the preparation method comprises the following steps: mixing a mixed solution of silica sol, water-soluble silicone oil, a composite silicon-based flame-retardant filler, potassium hydroxide and sodium hydroxide with ethylene glycol, filling laminated glass with the mixed solution, and sealing and curing to obtain the nano-silicon composite fireproof glass. The nano-silicon composite fireproof glass has high light transmittance and high fire resistance, the zinc-aluminum flame retardant and the nickel-titanium bimetal MOF which have flame retardance are compounded on the nano-silicon dioxide to obtain a composite silicon-based flame-retardant filler, and the zinc-aluminum flame retardant and the nickel-titanium bimetal MOF generate a synergistic effect through compounding of a multi-layer core-shell structure, so that the flame-retardant performance of the nano-silicon composite fireproof glass is improved, and the flame-retardant performance of the nano-silicon composite fireproof glass is improved. The flame-retardant and fire-resistant performance of the composite silicon-based flame-retardant filler is improved, and the influence of the flame retardant on the light transmission of the nano-silicon composite fireproof glass is reduced.

The invention discloses a medicinal silica gel desiccant with high adsorption speed and a preparation method thereof, and belongs to the technical field of desiccant preparation. The medicinal silica gel desiccant with high adsorption speed is prepared from the following components in parts by weight: 50-65 parts of silica gel, 4-8 parts of calcium chloride, 3-6 parts of magnesium sulfate, 3-7 parts of ferric oxide, 1-4 parts of an antibacterial compound, 5-10 parts of a modified surfactant, 1-2 parts of potassium hydroxide, 10-30 parts of ice water, 2-4 parts of acrylic acid, 2-4 parts of acrylamide and 0.4-0.8 part of sodium carboxymethyl starch. 0.2 to 0.3 part of benzoin dimethyl ether, 0.005 to 0.015 part of polyethylene glycol diacrylate and 1 to 2 parts of methanol. The silica gel desiccant prepared by the method has excellent antibacterial performance, adsorption rate and adsorption capacity.

The invention relates to the technical field of molten salt, in particular to nitro binary molten salt and a preparation method thereof. The preparation method comprises the following steps: mixing sodium carbonate and a potassium hydroxide solution, and then adding a starch-based grafted crystal inhibitor to inhibit crystallization; adding a nitric acid aqueous solution in two stages, and introducing eutectic seed crystals to guide nucleation at the end of the first stage; crystal distribution is optimized through falling film evaporation and concentration and setting of partial reflux; and after spraying granulation, carrying out short-time melting reforming and controlled cooling in an inert atmosphere. According to the method, the composition uniformity and the structural stability of the molten salt are remarkably improved, so that the product has a melting point close to a theoretical eutectic point, low supercooling degree, high melting latent heat and excellent thermal cycling stability and corrosion resistance, and is suitable for an industrial heat storage system running for a long time.

The invention provides a water treatment method and device using an alkali-reinforced copper-based material to excite peroxymonosulfate, and relates to the technical field of wastewater treatment.The method comprises the steps that an alkali agent, the copper-based material and peroxymonosulfate are added into water to be treated; the alkaline agent is sodium hydroxide and / or potassium hydroxide; the copper-based material is copper oxide and / or copper sulfide. The method provided by the invention has the advantages of excellent pollutant treatment effect, mild reaction conditions, simple process flow, environmental protection, energy saving, easy recovery and recycling and the like, and realizes the purposes of small dosage of the oxidant and the catalyst, high utilization rate of the oxidant, small dissolution amount of metal ions and up-to-standard pH of effluent.

The present invention relates to the technical field of cutting fluids, and in particular to a water-based high-lubricity cutting fluid and a preparation method thereof, comprising triethanolamine, an oily corrosion inhibitor, a lubricating additive, benzotriazole, a surfactant, a potassium hydroxide solution, a pH regulator and deionized water. The water-based high-lubricity cutting fluid in the present invention is compounded by lubricating additives, triethanolamine, an oily corrosion inhibitor, benzotriazole, a surfactant and the like, wherein the sulfide fatty acid ester embedded in the lubricating additive is thrown out from the pores under the action of centrifugal force when subjected to a high centrifugal speed, and adheres to the metal surface to form a dense sulfide film, which plays a lubricating role, can effectively reduce shear stress, reduce friction and power consumption, reduce the temperature of the friction part between the tool and the workpiece and the tool wear, improve the cutting performance of the workpiece material, and improve the lubrication performance of the cutting fluid, so that it has the characteristics of small usage and high cutting quality.

The invention belongs to the technical field of water electrolysis hydrogen production catalysts, and particularly relates to a preparation method and application of a bimetallic phosphide coupling layered double hydroxide electrocatalyst. The preparation method comprises the following steps: by taking a nickel source, an iron source, ammonium fluoride and urea as reactants, carrying out hydrothermal reaction to form a nickel-iron layered double hydroxide nano-catalyst precursor on a conductive substrate; and carrying out phosphating treatment on the nickel-iron layered double hydroxide nano-catalyst precursor by an electrodeposition method to obtain the bimetallic phosphide coupled layered double hydroxide electrocatalyst. Under the 1M potassium hydroxide solution test condition, the overpotential required by the catalyst is 89 mV when the current density in a linear scanning voltammetry curve is 10 mA cm <-2 >, and the catalyst is high in stability, simple in manufacturing process, energy-saving, suitable for industrial application and capable of being used for large-scale water electrolysis hydrogen production.

The invention relates to a preparation method of a multi-site silver (Ag) and nickel hydroxide (Ni (OH) 2) modified copper (Cu) nanowire catalyst (Ag-Ni (OH) 2) / Cu NW) and application of the multi-site silver (Ag) and nickel hydroxide (Ni (OH) 2) modified copper (Cu) nanowire catalyst. A cation exchange and electrodeposition method is adopted to prepare an electrocatalytic nitrate reduction reaction NO3-RR series catalyst with three sites of Ag, Ni (OH) 2 and Cu. Based on the synergistic effect of three sites, Ag in the catalyst promotes conversion from nitrate NO3 <-> to nitrite NO2 <->, Ni (OH) 2 promotes dissociation of water H2O to generate free hydrogen * H, Cu atoms near Ni (OH) 2 accelerate conversion from NO2 <-> to ammonia NH3, and the efficient series catalytic process is achieved. Under the condition of-0.1 V vs. Reversible hydrogen electrode RHE in a 1M potassium hydroxide solution containing 50 mM of potassium nitrate, the NH3 yield of 4.01 mgh <-1 > cm <-2 > and the NH3 Faraday efficiency of 97.3% are obtained, under the condition of 0V vs. RHE, the excellent energy efficiency of 46.5% is achieved, the excellent catalytic activity is kept in a NO3 <-> solution with the wide concentration, and the good sewage treatment capacity is achieved. The invention provides a new design thought for tandem catalysis, and has a wide application prospect in the field of NO3-RR.

The invention discloses an antistatic protective glove and a preparation method thereof, and relates to the technical field of protective gloves. The antistatic protective glove is prepared from the following raw materials in parts by weight: 50 to 60 parts of natural latex, 40 to 50 parts of neoprene latex, 0.4 to 2 parts of potassium hydroxide, 1.2 to 1.8 parts of peregal O, 1.5 to 3 parts of sulfur, 1 to 2 parts of accelerant BZ, 3.5 to 5 parts of antistatic agent, 0.5 to 1 part of sodium carboxymethyl cellulose and 1.2 to 1.8 parts of anti-aging agent. The preparation method of the antistatic agent comprises the following steps: firstly, reacting 1, 3, 5-tri (2, 3-epoxypropoxy) benzene with N1, N7 dimethyl heptane-1, 7-diamine to obtain a hyperbranched polymer, and then carrying out quaternization on the hyperbranched polymer and chlorinated octadecane to obtain the antistatic agent. The antistatic protective glove provided by the invention has excellent antistatic performance and anti-aging performance.

The invention discloses a preparation method of fireproof temperature-resistant special tempered glass, which comprises the following steps: pretreating substrate glass by using a mixed solution of cesium hydroxide and potassium hydroxide, with the cesium hydroxide content of 0.2-15 wt% and the potassium hydroxide content of 0.5-10 wt%; substrate glass is placed in the mixed solution of cesium hydroxide and potassium hydroxide, the mixed solution is placed in a micro-high-pressure environment for 0.5-1 hour, and the micro-high pressure is 10-15 MPa; basic glass is pretreated through a cesium hydroxide and potassium hydroxide mixed solution, under the synergistic effect of cesium hydroxide and potassium hydroxide, a hydroxyl layer on the surface of the glass is more easily removed, a silicon-oxygen network structure is damaged, a silicon-oxygen network is broken, more new diffusion ion channels are formed, and the ion exchange speed is increased; pretreatment is carried out in a micro-high-pressure environment, so that the substrate glass pretreatment speed can be increased, and the pretreatment time is remarkably shortened.

The present invention provides a sulfur autotrophic denitrification filler and a preparation method thereof. The sulfur autotrophic denitrification filler of the present invention comprises the following raw materials in parts by weight: 50-100 parts of sulfur powder, 5-20 parts of pH buffer, 10-50 parts of medical stone, and 0-10 parts of additives; wherein the pH buffer is one or more of sodium carbonate, sodium bicarbonate, sodium hydroxide, and potassium hydroxide; and the additive is one or more of amide substances and epoxy resins. The sulfur autotrophic denitrification filler has good filler strength and a long service life, and can be conducive to the attachment of denitrifying thiobacillus to the surface of the sulfur autotrophic denitrification filler, thereby increasing the microbial concentration per unit volume of the filler and increasing the reaction rate.

The invention provides a high-quality potassium hydroxide refining and impurity removal process, belongs to the field of potassium hydroxide impurity removal, and aims to overcome the defect that the purity of a potassium hydroxide product is reduced due to defects in removal precision and process stability during potassium hydroxide impurity removal in the prior art. The method comprises the following steps: carrying out oxidation decomposition on organic matters and precipitating calcium and magnesium ions, carrying out coarse filtration to remove large-particle impurities, carrying out graded filtration by adopting a three-stage series inorganic membrane module, carrying out efficient interception on impurities with different particle sizes by accurately controlling the pressure, temperature and flow rate of each membrane layer, and carrying out hydrochloric acid neutralization and potassium sulfite dechlorination to optimize the indexes of the brine. And finally, trace calcium and magnesium ions are deeply removed by utilizing the selective adsorption characteristics of the chelate resin and the strong acid cation resin, and after the resin is saturated, the resin is eluted, regenerated and recycled through acid and alkali with specific concentration, so that the impurity removal effect of potassium hydroxide is improved.

The present invention provides a kind of detection method of thirteen kinds of related substance contents in vonoprazan fumarate, and high performance liquid chromatography is used for detection, and the chromatographic conditions are: the test solution and the reference solution are injected into the high performance liquid chromatograph, and the chromatographic conditions are: the chromatographic column adopts octadecyl bonded silica gel column; the ultraviolet detector is used, and the detection wavelength is 260nm; the injection volume: 10μl; the column temperature: 30℃‑40℃; the flow rate: 0.8ml / min‑1.0ml / min; the gradient elution method is used, and the mobile phase A: the solution of 0.02mol / L potassium dihydrogen phosphate solution adjusted to pH 8.0 with potassium hydroxide solution and isopropanol mixed with a volume ratio of 95:5; the mobile phase B: the mixed solution of acetonitrile and isopropanol with a volume ratio of 95:5. The method can be used to detect the contents of 13 kinds of related substances in vonoprazan fumarate, and high performance liquid chromatography is used for detection, and the method has high detection sensitivity, and the verification results show that the system applicability and specificity of this method meet the requirements, and the needs of drug production quality monitoring can be met.

The invention provides an intrinsic magnetic MXene material and a preparation method and application thereof, the preparation method comprises the following steps: S1, mixing an aqueous solution of MXene with an alkaline reagent, and carrying out ultrasonic dispersion to obtain a mixed dispersion liquid; freezing the mixed dispersion liquid into a solid by liquid nitrogen; the alkaline reagent is potassium hydroxide or sodium hydroxide; s2, the obtained solid is subjected to freeze drying, and the Archimedes screw type MXene aerogel is obtained; s3, the Archimedes spiral type MXene aerogel is subjected to heat treatment under the protection of inert gas, and the intrinsic magnetic MXene material is obtained. The invention designs and develops a single-component pure MXene electromagnetic wave absorbing material on the premise of not introducing magnetic nanoparticles.