1115 results about "Potassium hydroxide" patented technology

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 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 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 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 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 invention provides a charcoal-loaded iron-based catalyst suitable for heterogeneous catalysis as well as a preparation method and application of the charcoal-loaded iron-based catalyst. The preparation method comprises the following steps: firstly, activating and modifying tea leaves by adopting a potassium hydroxide solution, and then carrying out heat-preservation pyrolysis in a carbon dioxide atmosphere to obtain tea-leaf-based biochar; uniformly mixing an iron source, a manganese source, a cerium source and a citric acid solution; adding tea-based biochar, uniformly mixing, and drying to obtain a precursor; and heating the precursor to 400-650 DEG C, and carrying out heat preservation and pyrolysis to obtain the biochar-loaded iron-based catalyst. The biochar-loaded iron-based catalyst has excellent degradation and removal effects and cycle stability on xylene.

The invention discloses high-performance asphalt-based porous carbon and a preparation method and application thereof.The preparation method comprises the following steps that refined asphalt is heated and stirred, then oxygen-containing gas is introduced, and oxygen-containing modified pre-oxidized refined asphalt is obtained through segmented heating oxidation treatment; heating the pre-oxidized asphalt to different temperatures in different stages in an inert atmosphere for pre-carbonization; placing the pre-carbonized product in a hydrogen-containing mixed atmosphere, and dynamically regulating and controlling the carbonization process according to asphalt components; and mixing the carbonized product with potassium hydroxide and sodium hydroxide mixed alkali, carrying out multi-temperature-zone stepped activation, washing, and drying to obtain the asphalt-based porous carbon. According to the invention, refined pitch is directly used as a carbon source raw material, pre-oxidation is carried out to obtain a partial oxygen-containing hard carbon structure, low-temperature pre-carbonization is carried out to obtain a carbonized precursor with very few volatile components, porous carbon is subjected to moderate graphitization through carbonization, the conductivity of a skeleton is improved, the skeleton is further subjected to pore forming through activation, and the high-performance porous carbon material is obtained.

The invention discloses a preparation method of high-viscosity cationic starch, which belongs to the technical field of modified starch, and comprises the following steps: crosslinking epichlorohydrin, ball-milling and cationizing; the epoxy chloropropane crosslinking comprises the following steps: mixing starch, calcium hydroxide and deionized water, stirring at 40-50 DEG C, adding sodium stearoyl lactylate, stirring at 50-55 DEG C, naturally cooling to room temperature, adding sodium chloride and epoxy chloropropane, stirring, dropwise adding a potassium hydroxide aqueous solution, stirring, adjusting the pH value to 6, filtering, taking filter residues, washing and drying to obtain crosslinked starch; in the step of ball milling, calcium hydroxide, sucrose fatty acid ester SE-11 and deionized water are mixed and then subjected to ball milling, and a ball-milled material is obtained; the prepared high-viscosity cationic starch is high in paste liquid viscosity and cationic substitution degree, good in paste liquid viscosity stability, uniform in substitution degree and paste liquid viscosity, high in reaction efficiency in cationization and low in alkali consumption.

The invention belongs to the technical field of biochar, and provides nitrogen-doped graded porous biochar as well as a preparation method and application thereof. The preparation method comprises the following steps: performing hydrothermal reaction on coconut shell biomass powder and urea to obtain nitrogen-doped biomass powder, and mixing the nitrogen-doped biomass powder with an activating agent for carbonization; the activating agent comprises potassium hydroxide and potassium nitrate. The agricultural waste coconut shells are prepared into the porous biochar, the raw material sources are wide, the production cost is low, the porous biochar is environmentally friendly, and the preparation method has the advantage of being high in yield which is 2.85 times that of a traditional alkali activation method; the nitrogen-doped graded porous biochar has the characteristics of excellent graded porous structure, strong chemical stability, high nitrogen content and high specific surface area, the adsorption capacity of gaseous iodine is effectively improved, the adsorption capacity of 6000 mg / g or above can still be kept after five times of adsorption, and the nitrogen-doped graded porous biochar has relatively good iodine retention capacity.

The invention relates to the technical field of lithium ion battery negative electrode materials, in particular to a silicon-carbon negative electrode material based on spherical-like resin porous carbon and a preparation method thereof.The method comprises the steps that resin and an emulsifier are fully reacted, solid resin microspheres are obtained after treatment, then high-temperature carbonization is conducted, potassium hydroxide activation is conducted after smashing, and the spherical-like resin porous carbon-based silicon-carbon negative electrode material is obtained; and carrying out acid washing to obtain the spheroidic porous carbon. And the silicon-carbon negative electrode material is obtained after vapor deposition, and the material is particularly suitable for a high-energy-density power battery.

This invention provides a chitosan-loaded biochar and its applications. The provided chitosan-loaded biochar is prepared by treating biochar with an alkaline solution, followed by mixing the modified alkaline-treated biochar with a solution containing dissolved chitosan. The chitosan-loaded biochar prepared by this invention can be used to adsorb chemical pollutants in aquatic environments and can also be used as a carrier for microorganisms. By modifying the biochar with potassium hydroxide, this invention allows for the loading of more chitosan, significantly improving the utilization rate of chitosan. This invention increases the specific surface area of ​​the biochar, thereby increasing the attachment sites for chitosan. Compared to other methods that increase chitosan loading by increasing the thickness of the chitosan, this invention not only allows for a greater chitosan loading on the biochar but also ensures a more uniform distribution of chitosan on the biochar, fully leveraging the advantages of chitosan-loaded biochar.

The invention discloses an amorphous PtNi self-supporting catalytic electrode, a preparation method thereof and a direct ammonia fuel cell, and belongs to the technical field of electrode materials. According to the technical scheme, the catalytic electrode adopts foamed nickel as a conductive framework substrate, and an amorphous PtNi alloy wall-shaped array structure grows on the foamed nickel in situ; the preparation method of the catalytic electrode comprises the following steps: pretreating the foamed nickel substrate; the preparation method comprises the following steps: adding platinum diacetylacetonate, potassium hydroxide, N, N-dimethylformamide and diethylenetriamine into ethylene glycol to prepare a precursor solution; and immersing foamed nickel into the precursor solution, and carrying out in-situ growth reaction under high-temperature and high-pressure conditions to obtain the amorphous PtNi self-supporting catalytic electrode. The catalytic electrode has the beneficial effects that the catalytic electrode shows high specific activity and extremely low apparent activation energy in ammoxidation reaction, still keeps 90% of current density after continuously working for 1000 hours, and shows excellent long-term stability and durability.

The invention discloses a vapor deposition silicon carbon material and a preparation method and application thereof, and relates to the technical field of lithium ion battery negative electrode materials, and the preparation method comprises the following steps: dissolving phenolic resin in a solvent, then adding boric acid, heating and stirring until the solution is clear, pouring the obtained aqueous phase solution into an oil phase, adding an emulsion stabilizer, and uniformly stirring; a solution of a water-in-oil system is obtained; heating the obtained solution of the water-in-oil system, continuously stirring, adding a curing agent, continuously stirring, removing an oil phase on the surface, and drying to obtain a phenolic resin microsphere precursor; carrying out heat treatment in an oxidizing atmosphere, cooling, calcining in an inert atmosphere, cooling, washing and drying to obtain a carbonized precursor; and mixing and grinding the carbonized precursor and potassium hydroxide, calcining, cooling, washing, drying, and introducing silane gas for deposition to obtain the vapor deposition silicon-carbon material. The preparation process is simple, the cost is low, and the first efficiency of the prepared vapor deposition silicon carbon material is high.

The invention discloses a method for measuring the content of calcium fluoride in dolomite-containing fluorite mine. The method comprises an acetic acid solution, a hydrochloric acid solution, a triethanolamine solution, a potassium hydroxide solution and boric acid. The method for measuring the content of calcium fluoride in the dolomite-containing fluorite mine comprises the following steps: S1, reagent proportioning; s2, preparing a calcium standard solution; s3, preparing an EDTA standard titration solution; s4, selecting an instrument; s5, preparing a sample; s6, step analysis; s7, content correction and determination; and S8, calculating a result. The invention belongs to the technical field of calcium fluoride content determination, and particularly relates to a method for measuring the content of calcium fluoride in dolomite-containing fluorite mine, compared with the prior art, the method solves the problem of dolomite dissolution when calcium carbonate is leached by acetic acid, and the content of calcium fluoride in the fluorite mine can be measured by accurately calculating the dissolution amount of dolomite. The measured calcium fluoride content is clearer, more reasonable and more reliable and approaches to a true value, and the process operation is simple and rapid, and is suitable for the requirements in the fields of mine production, assay detection and the like.

The invention discloses a green and efficient carbonyl alkylation pyrrolo [1, 2-a] indole synthesis method, and relates to the technical field of organic synthesis. An alpha-bromocarbonyl compound is used as a carbonyl alkyl source, Ir (ppy) 3 is used as a photosensitizer, potassium hydroxide is used as alkali, sodium dimethyl dithiocarbamate is used as an additive, acetonitrile is used as a solvent, a carbonyl alkylation / cyclization reaction of N-alkenyl substituted indole is realized under the condition of visible light, and corresponding carbonyl alkylation pyrrolo [1, 2-a] indole is obtained. The method is convenient to operate, green and efficient in reaction and wide in substrate applicability.

The invention relates to the technical field of preparation of composite carbon sources, and discloses a method for preparing a micromolecular composite carbon source by using soapstock acidified leftovers, which comprises the following steps: pretreatment: centrifugally separating the soapstock acidified leftovers, recovering crude fatty acid, and regulating the pH value of the water phase to 5.0-6.0 by using an alkaline regulator, performing enzymolysis, namely adding compound protease into the pretreated water phase, performing enzymolysis reaction at 45-55 DEG C, performing organic acid hydrolysis, namely adding small molecular organic acid into a system subjected to enzymolysis, adjusting the pH value of the system to 2.0-4.0, performing hydrolysis reaction at 85-100 DEG C, performing neutralization and post-treatment, cooling the system after the hydrolysis is completed, neutralizing the pH value of the system to 5.5-6.5 by adopting an alkaline substance, and performing post-treatment to obtain a finished product. And filtering to obtain the small molecular carbon source. The alkaline substance is potassium hydroxide, ammonia water or urea. According to the method for preparing the micromolecular composite carbon source by utilizing the soapstock acidified leftovers, the waste liquid, which is the soapstock acidified leftovers generated in the grease refining process and is difficult to biochemically treat, can be converted into the micromolecular composite carbon source with high market value.

The invention discloses vinyl fluorine-containing polysiloxane and a preparation method thereof, and relates to the technical field of organic silicon materials. According to the invention, high-activity fluorine-containing potassium hydroxide silanolate is used as a catalyst to realize high-efficiency catalysis; d3F serves as a main monomer, D3Vi serves as a comonomer, deionized water is introduced for the first time to serve as a retarder, and implosion is effectively inhibited; vinyl dimethyl ethyoxyl silane is used as an end-capping reagent for the first time, end group vinylation is synchronously realized, and end group and side chain divinyl polysiloxane is prepared; through cooperation of ring-opening polymerization and condensation polymerization, the reaction process is mild and controllable, the product viscosity is controllable, the crosslinking activity is high, and the application range is remarkably widened.

The invention belongs to the technical field of organic fertilizer production, and discloses a method for preparing a high-fulvic-acid type organic fertilizer through minute-level decomposition of chicken manure and application of the high-fulvic-acid type organic fertilizer. The preparation method comprises the steps that urea peroxide, potassium percarbonate, potassium hydroxide and ferrous sulfate are added into pretreated chicken manure, the mixture is stirred and fully mixed at the temperature of 20-30 DEG C and then stands, decomposition is conducted, and the high-fulvic-acid type organic fertilizer is obtained. The decomposition time does not exceed 30 min, and the content of fulvic acid in the high fulvic acid type organic fertilizer is 10-15 wt%; the application comprises the following steps: fully mixing the high fulvic acid type organic fertilizer with the attapulgite and the xanthan gum, granulating by a drum method, and then uniformly applying the mixture to the surface of soil according to 67-100kg / mu. According to the invention, the combination of urea peroxide, potassium percarbonate, potassium hydroxide and ferrous sulfate is utilized to quickly compose the chicken manure, the fulvic acid content and humification degree of the composted chicken manure are high, effective humification of the chicken manure within a short time is realized, the fertilizer efficiency is improved, and the method has important application prospects.

The application discloses a kind of high waterproof moisture-permeable polyurethane film materials and high waterproof moisture-permeable fabric, it is related to polyurethane film material technical field, high waterproof moisture-permeable polyurethane film material, including following raw materials: polyether diol, diisocyanate, organic solvent, modified porous biochar, modified diatomite, chain extender, thickening agent, defoaming agent, ultraviolet absorber, dibutyltin dilaurate;The modified porous biochar is prepared by activating corn straw powder by potassium phosphate and potassium hydroxide in cooperation, and polyethylene glycol is added as a dispersant, and the modified porous biochar is treated by mercapto and fluorination modification;By introducing potassium phosphate in cooperation with potassium hydroxide to form an activation system in the preparation of modified porous biochar in polyurethane film material, combined with polyethylene glycol, dispersion optimization and reduction synergy are realized, and the moisture permeability, waterproofness, mechanical properties and durability of the material are improved.

The invention discloses a potassium propionate continuous synthesis process, and relates to the technical field of potassium propionate synthesis, the process comprises the following steps: S1, raw material pretreatment: selecting fermentation waste liquid containing propionic acid and acetic acid and potassium ore leaching liquid containing potassium hydroxide and potassium carbonate as composite raw materials, adding a composite chelating agent into the potassium ore leaching liquid, and uniformly stirring; according to the method, the composite raw material system composed of the fermentation waste liquid and the potassium ore leaching liquid is adopted, and the composite chelating agent is added, so that resource utilization of industrial waste is achieved, the raw material cost is reduced, meanwhile, impurities are prevented from interfering with continuous reaction, and through gradient temperature control-pressure cooperative regulation and linkage regulation of the PLC system, the yield is increased. The problem of product deliquescence caused by local overheating is solved, volatilization loss of propionic acid is reduced, the adaptability of the technology to raw material batch fluctuation is improved through raw material concentration online detection and dynamic parameter adaptation, the continuous production stability is guaranteed, and finally synchronous improvement of the potassium propionate synthesis efficiency and the product quality is achieved.

The invention provides an iridium-ruthenium oxide composite catalyst, a preparation method thereof and a proton exchange membrane water electrolysis device, and relates to the field of hydrogen production through water electrolysis. The preparation method of the iridium-ruthenium oxide composite catalyst comprises the following steps: mixing sodium nitrate, ruthenium chloride and water to prepare a mixed solution, and then drying and grinding to obtain a mixture; placing the mixture on the surface of nickel foil, carrying out first heating by using Joule heating equipment, and then cooling to obtain ruthenium oxide; mixing ruthenium oxide, hexadecyl trimethyl ammonium bromide and ethylene glycol, and performing ultrasonic dispersion to obtain a ruthenium oxide solution; and mixing the ruthenium oxide solution, H2IrCl6 and potassium hydroxide, adjusting the pH value of the system to be alkaline, then carrying out second heating until reflux and constant-temperature reaction, carrying out solid-liquid separation on the reaction product, and washing to obtain the iridium-ruthenium oxide composite catalyst. The iridium-ruthenium oxide composite catalyst provided by the invention has high activity, high stability and high water electrolysis efficiency.

The invention discloses an oxidation-resistant monomer casting nylon material and a preparation method thereof, and relates to the field of material preparation, and the monomer casting nylon material is applied to a high-temperature and oxygen-enriched environment and comprises the following components in parts by mass: 100 parts of caprolactam; 0.1-0.3 part of a catalyst which is one of sodium hydroxide, potassium hydroxide or lithium hydroxide; 0.5 to 1.5 parts of an activating agent, wherein the activating agent is N-acetyl caprolactam; 0.7 to 3 parts of a main antioxidant, wherein the main antioxidant comprises a hindered phenol antioxidant and a thioester antioxidant; 0.1-0.5 part of an auxiliary antioxidant, which is a metal deactivator; 1-3 parts of an inorganic filler which is modified montmorillonite; and 0.5-2 parts of a hydrophobic agent which is a silane coupling agent. By constructing a composite anti-oxidation system, multi-level synergistic protection can be formed for three key oxidation stages of free radical initiation, peroxide accumulation and metal catalysis, and a full path of an oxidation chain reaction is covered from a molecular level, so that the aging process of the material is remarkably delayed, and the service life of the material is prolonged. And high oxygen resistance and relatively long service life are provided for nylon application under severe working conditions.

The invention relates to the technical field of chemistry, in particular to a synthesis process of 4-fluoro-3, 5-dimethylphenylhydrazine hydrochloride, which comprises the following steps: by taking 4-fluoro-3, 5-dimethylbromobenzene as a raw material and hydrazine hydrate as a hydrazine source, matching with alkali such as potassium hydroxide, sodium hydroxide or potassium phosphate and the like, reacting at the temperature of 60-80 DEG C to obtain the 4-fluoro-3, 5-dimethylphenylhydrazine hydrochloride. The preparation method comprises the following steps: by taking copper or nickel source catalysts such as cuprous bromide, cuprous iodide, nickel salicylate and the like, N, N-bis (2, 6-dimethylphenyl) oxamide as a ligand, hexadecyl trimethyl ammonium bromide as a stabilizer and a dioxane-water mixed system as a solvent, reacting at 80-110 DEG C under the protection of nitrogen, separating a reaction mixed solution after the reaction is finished, and separating the reaction liquid to obtain the target product. And purifying to obtain a finished product of the 4-fluoro-3, 5-dimethyl phenylhydrazine hydrochloride. Therefore, the problems that the synthesis of the 4-fluoro-3, 5-dimethylphenylhydrazine hydrochloride is poor in safety, low in production efficiency, poor in environmental friendliness, small in substrate application range and the like are solved.

The invention discloses a micro-arc oxidation coating for an artificial hip joint Ti6Al4V alloy and a preparation method of the micro-arc oxidation coating. The preparation method comprises the following steps that S1, pretreatment is conducted; s2, preparing a micro-arc oxidation electrolyte; s3, preparing a micro-arc oxidation coating; s4, cleaning and drying treatment; a preparation method of the electrolyte comprises the steps that 6 g of sodium metaaluminate solid powder, 4 g of potassium hydroxide solid powder, 2 g of sodium hexametaphosphate solid powder, 4 g of sodium silicate solid powder and 4 g of yttrium oxide nanoparticles are sequentially weighed and added into a beaker, then 980 mL of ultrapure water at the temperature of 60 DEG C is added into the beaker, and stirring is conducted for 2 min while the temperature is kept; the yttrium oxide particles are approximately spherical or ellipsoidal, the particle size range is 20-50 nm, and the purity is 99.99%. The yttrium oxide nanoparticles are introduced into the electrolyte, the micro-arc oxidation coating containing the yttrium oxide is prepared on the surface of the Ti6Al4V alloy, and compared with a traditional micro-arc oxidation coating, the surface porosity of the micro-arc oxidation coating containing the yttrium oxide is remarkably reduced, and the compactness is remarkably improved.

The invention discloses a preparation process of carboxylated shell-based activated carbon for organic matter adsorption, and particularly relates to the technical field of adsorption materials, and the preparation process comprises the following steps: mixing coconut shell powder and walnut shell powder, crushing, and loading potassium hydroxide in stages in a gradient manner; carrying out two-stage microwave activation in an inert atmosphere, namely low-temperature pre-activation in the first stage and high-temperature activation in the second stage, and introducing carbon dioxide; the activated product, phosphoric acid, a laccase-peroxidase complex enzyme preparation and a buffer solution are subjected to ultrasonic synergistic modification, and then a weak acid reaction is maintained through dynamic pH regulation and control; and finally, performing graded washing and gradient drying to obtain a finished product. According to the method, high-density carboxyl grafting and graded pore construction are synchronously realized under mild conditions through a synergistic effect of directional catalysis of biological enzyme and dynamic regulation of microwave, so that the problems of structural damage caused by strong acid corrosion, pore imbalance caused by fixed parameters and stability reduction caused by insufficient post-treatment in a traditional process are solved; the adsorption performance and the regeneration cycle performance of the material are also obviously improved.

The invention discloses a multi-source solid waste-based cementing material and a preparation method thereof, and relates to the technical field of solidified organic matter soft soil cementing materials. The cementing material is prepared from the following raw materials: carbide slag, desulfurized fly ash, yellow phosphorus slag, high-activity and high-stability steel slag, modified red mud, alkaline residues, desulfurized gypsum, mineral slag and calcium sulphoaluminate; the high-activity and high-stability steel slag is prepared by carrying out steel slag preliminary stabilization treatment and steel slag excitation activation on liquid steel slag; exciting and activating the steel slag: preparing high-activity and high-stability steel slag from the stabilized steel slag, the modified ettringite particles, aluminum sulfate, a polycarboxylate superplasticizer, hexadecyl triethyl ammonium bromide and potassium hydroxide; the modified red mud is prepared from red mud, magnesium hydroxide, N-methyldiethanolamine, desulfurized fly ash, calcium oxide and a ferric chloride solution; the modified ettringite particles are prepared from polyvinyl alcohol and N-beta-aminoethyl-gamma-aminopropyl trimethoxy silane as a modifying agent. The preparation method comprises the following steps: preparing the modified ettringite particles; according to the multi-source solid waste-based cementing material, the compressive strength and the water stability coefficient of the solidified organic matter soft soil are effectively improved.

The invention relates to the technical field of porous carbon electrode materials, in particular to a preparation method of a porous carbon electrode material with a waste medical mask as a raw material, comprising the following steps: S1, soaking the waste medical mask in concentrated sulfuric acid for sulfonation reaction; and filtering, washing and drying to obtain the sulfonated mask particles. And S2, mixing the sulfonated mask particles with solid alkali, and carrying out mechanical ball milling activation treatment to obtain the activated mask derived porous carbon material. S3, performing high-temperature calcination on the mask derived porous carbon material, and then adding hydrochloric acid to remove residual solid alkali; and alternately washing with ionized water and ethanol, and drying to obtain the porous carbon electrode material. The preparation method has the advantages that agglomeration of material particles is effectively avoided through ball milling, and the dispersity and the specific surface area of the material are improved. Through the synergistic effect of mechanical ball milling and a potassium hydroxide activating agent, a hierarchical pore structure is accurately constructed in a carbon skeleton of polypropylene, and an ion transmission path is optimized.