362 results about "Potassium carbonate" patented technology

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 application provides an ultra-high performance concrete and a preparation method thereof, and the concrete comprises the following raw materials in parts by weight: cement 260-280 parts, modified quartz sand powder 120-160 parts, modified steel fiber 8-15 parts, fly ash 20-26 parts, polycarboxylic acid water reducing agent 7-12 parts, EVA emulsion 16-24 parts, alkali-resistant glass fiber 4-7 parts, and water 140-180 parts. The preparation method of the modified steel fiber is as follows: the steel fiber is soaked in a potassium hydroxide solution and then dried, the dried steel fiber is added into a calcium hydroxide slurry, potassium carbonate is added for a first stirring reaction, a mixed solution of nano-SiO2 and a coupling agent is further added for a second stirring reaction, filtration and drying are performed, and the modified steel fiber is obtained. The ultra-high performance concrete prepared by the application has scientific proportioning of various raw materials, good toughness, strength and crack resistance, and can effectively improve the service life of the concrete.

The invention discloses a carbon enzyme polypeptide water-soluble fertilizer and a preparation method thereof, and the water-soluble fertilizer is prepared from the following raw material components in parts by weight: 160-220 parts of urea crystal, 45-60 parts of polymeric carbon enzyme, 40-60 parts of potassium carbonate, 10-30 parts of polypeptide amino acid, 50-70 parts of pine pollen, 10-40 parts of trace elements, 30-60 parts of charcoal, 60-80 parts of modified ground phosphate rock, 2-6 parts of coenzyme and 30-80 parts of chitosan-humic acid slow-release copper fertilizer. According to the fertilizer synergist disclosed by the invention, the peat soil is added, so that the content of humus is greatly increased, the fertilizer synergist has a very good promoting effect on improving the soil fertility and improving the physical and chemical properties of soil after being applied, and meanwhile, the addition of various beneficial microbial agents can assist plant root systems to absorb the fertilizer, can fully release fertilizer nutrients, and improves the use effect of the fertilizer; therefore, growth of plant roots is promoted, and crop yield is increased.

The application provides a method for synthesizing an eplerenone intermediate N-1 by one-pot method, and belongs to the technical field of organic synthesis. The method is characterized in that: the eplerenone intermediate N-4 is dissolved in dichloromethane, a potassium carbonate aqueous solution and dibromohydantoin are added to perform an opening ring reaction; after the reaction is completed, hydrochloric acid is directly added to perform a rearrangement reaction; then water is separated and methanol is added in the organic layer to perform an ozonation reaction; then sodium sulfite is added to perform a reduction reaction; then hydrochloric acid is added to perform a methyl esterification reaction, so as to obtain the eplerenone intermediate N-1 crude product, and finally the eplerenone intermediate N-1 fine product is obtained through refining. The method realizes the one-pot synthesis of the eplerenone intermediate N-1 from the eplerenone intermediate N-4 through the continuous reactions of opening ring, rearrangement, ozonation, reduction and methyl esterification, and can avoid column chromatography purification, so that the method becomes a green chemical process route with greatly reduced organic solvent consumption and wastewater.

Provided are a method and a system for producing calcium carbonate, in which a content of alkali in calcium carbonate obtained using a calcium-containing waste can be controlled. There is provided a method (system) for producing calcium carbonate from a calcium-containing waste, including: a calcium dissolution step of adding aqueous hydrochloric acid to a calcium-containing waste and dissolving calcium to produce an aqueous solution containing a calcium ion; a separation step of adjusting a hydrogen ion concentration index of the aqueous solution containing a calcium ion and separating Mg and the like from the aqueous solution; a calcium carbonate preparation step of producing calcium carbonate by adding an aqueous solution containing potassium carbonate and / or sodium carbonate to the calcium ion-containing aqueous solution obtained in the separation step to cause a reaction to occur, in which in the calcium carbonate preparation step, an addition rate of the aqueous solution containing potassium carbonate and / or sodium carbonate is controlled such that κ represented by a specific expression is 3000 or lower.

The invention relates to polyethersulfones which can be used as engineering thermoplastics and also as polymers suitable for use in membrane technologies. A method for producing a polyethersulfone includes carrying out a nucleophilic polycondensation between 4,4'dioxydiphenyl sulfone and 4,4'dichlorodiphenyl sulfone in the presence of potassium carbonate in an aprotic solvent environment in two steps of: a) obtaining a dipotassium salt of 4,4'dioxydiphenyl sulfone and b) adding 4,4'dichlorodiphenyl sulfone to the salt obtained in the first step, then holding the resulting mixture while controlling the viscosity thereof to provide a mixture containing a polyethersulfone in a dissolved form in which the mass fraction of the polymer is from 50.5 to 53.3%, isolating the polyethersulfone and drying same. The invention makes it possible to produce a high-molecular-weight polyethersulfone having a controlled set mass-average molecular mass of from 85340 to 104300 g / mol, rendering the polymer suitable for use in the production of finished articles.

This invention belongs to the field of glass technology and relates to a high-temperature resistant structural glass material, its preparation method, and its applications. The glass is composed of the following components by mass percentage: 60%-70% silicon dioxide, 5.5%-11% boric acid, 0.1%-5% aluminum hydroxide, 0%-3% potassium nitrate, 5.5%-13% potassium carbonate, 0%-12% sodium carbonate, 0.1%-4% calcium carbonate, 0%-2% calcium fluoride, 0%-1% lithium carbonate, 0%-2% basic magnesium carbonate, 0.1%-1% titanium dioxide, 0%-2% zirconium dioxide, and 0%-1% cerium dioxide; the total mass percentage of potassium nitrate, potassium carbonate, sodium carbonate, and lithium carbonate does not exceed 22%. This structural glass possesses a high softening temperature, a suitable coefficient of thermal expansion, high-temperature resistance, thermal shock resistance, and processing performance, making it suitable as a structural material for optoelectronic devices.

The invention relates to the technical field of catalysts, and discloses a catalyst and a preparation method thereof, and a method for preparing 4-methyl-1-pentene through propylene dimerization, the catalyst comprises a carrier, and an active metal component and an auxiliary metal component loaded on the carrier; wherein the carrier comprises potassium carbonate and a binder, the active metal component is selected from sodium and / or potassium, and the auxiliary metal component is selected from at least one of precious metals; wherein on the basis of the mass of the carrier, the content of the active metal component is 1-20wt% and the content of the auxiliary metal component is 0.1-10wt% in terms of metal elements. The catalyst has high catalytic activity and stability in propylene dimerization reaction.

The application discloses a cast iron enamel high-temperature matte glaze without fluorinated salt and nitrate, and a preparation method and application thereof, and belongs to the technical field of enamel. The matte glaze is prepared from quartz, borax pentahydrate, titanium dioxide, sodium carbonate, calcium carbonate, barium carbonate, aluminum oxide, sodium tripolyphosphate, potassium carbonate and lithium carbonate according to specific mass proportions. The preparation comprises raw material mixing, smelting at 1300+ / -10 DEG C under a pure oxygen environment, and rapid cooling after wire drawing detection of the smelting state. The matte glaze completely avoids the use of fluorinated salt and nitrate, eliminates the problems of fluoride emission and environmental protection equipment blockage from the source, and the fluorine content of the product is not detected through detection, thereby meeting the limit value requirements of the EU REACH regulation. Meanwhile, the matte glaze has good enamel surface, excellent firing performance and matte performance, is suitable for a cast iron substrate, has a firing temperature of 780-800 DEG C, and can be used for the production of green and environmentally-friendly enamel products.

The invention relates to the technical field of cleaning tablets, and provides a multi-effect cleaning tablet for a kitchen waste processor and a preparation method of the multi-effect cleaning tablet. The multi-effect cleaning tablet comprises a foaming cleaning layer, an oxidation sterilization layer and a deep decomposition layer, the foaming cleaning layer is arranged on one side of the oxidation sterilization layer, the deep decomposition layer is arranged on the opposite side of the oxidation sterilization layer, and the foaming cleaning layer comprises sodium bicarbonate, gluconic acid-delta-lactone, alkyl glycoside, limonene and a chelating agent; the oxidation sterilization layer comprises sodium percarbonate, potassium hydrogen peroxysulfate, potassium carbonate, sodium citrate and a stabilizer; the deep decomposition layer comprises biological enzyme. Gluconic acid-delta-lactone is adopted in the foaming cleaning layer of the multi-effect cleaning tablet to generate gluconic acid, so that the system is prevented from instantly and violently turning over, a middle-layer peroxidation system is favorably released at a proper time, invalid decomposition is reduced, strong acid or violent pH fluctuation is prevented from permeating into an inner layer, the enzyme inactivation risk is reduced, the foaming process is mild, and the foaming effect is good. And the integral integrity of the tablet can be maintained.

The invention provides a silicon fertilizer composition, a preparation method thereof, a silicon fertilizer compounding model and a prediction system, and belongs to the field of intelligent agriculture. The preparation method of the silicon fertilizer composition comprises the following steps: by taking silicon-containing industrial waste as a raw material, carrying out chlorine gas reaction, leaching to remove soluble substances by using water in one path, retaining solid substances, and carrying out hydrothermal reaction with a sodium carbonate or potassium carbonate aqueous solution; the other path is immersed in strong alkali liquor at the temperature of 180-200 DEG C to obtain a CaSiO3 component; and compounding the two products according to the required ratio to obtain the silicon fertilizer composition. The problems of high energy consumption and high cost of traditional silicon fertilizer production are solved, the production cost is reduced by 50% or above, the soil remediation efficiency is improved by 40%, and the method is suitable for soil hardening remediation, desertification control, waste reclamation and other scenes and provides key technical support for intelligent agriculture development.

The invention belongs to the technical field of pyridazine derivative preparation. The invention provides a preparation method of a pyridazine derivative. The preparation method comprises the following steps: adding a compound with a general formula 1, iron nitrate nonahydrate, potassium carbonate and 4CzIPN into tetrahydrofuran for reaction; the reaction equation is shown in the specification; in the formula (I), R is hydrogen, 4-methyl, 4-methoxyl, 3-methoxyl, 2-iodine or 4-chlorine. The method provided by the invention is simple and convenient to operate and does not need high temperature and oxidant. The target product simultaneously contains diaza and pyridazine skeletons.

Provided is a synthesis method for azoxystrobin, comprising: in a water-oil system of an organic solvent and an aqueous solution of trimethylamine, a compound represented by formula I reacts with 2-cyanophenol to obtain azoxystrobin, wherein the molar ratio of the compound represented by formula I to trimethylamine is 1:(0.96-2). The synthesis method has high reaction efficiency, does not produce CO2, avoids the risks of entrainment and overflow, reduces the generation of side reactions and solid waste emissions and is environmentally friendly. In addition, the method does not require the use of solid sodium carbonate or potassium carbonate, and the material reaction system is an oil-water reaction system, so that the reaction efficiency is greatly improved, and the yield can also be maintained at 95% or more, thereby taking both the efficiency (timeliness) and the yield into account and easily achieving continuous reaction, and thus providing technical support for intelligent and unmanned production. Moreover, since trimethylamine can be recycled, the use of one raw material is reduced, and further there is no need for complicated treatment for mixed salts and waste water thereof, thereby significantly reducing the energy consumption.

The invention discloses a catalyst for synthesizing 1, 3-dioxane-2-ketone as well as a preparation method and application of the catalyst. The catalyst is prepared from the following components in percentage by mass: 60wt%-90wt% of a component A, 5wt%-20wt% of a component B and 5wt%-30wt% of a component C, wherein the component A is one or more of N, N-dimethyl formamide, N, N-dimethylacetamide, N, N-diethyl formamide and urea, and the component B is one or more of N, N-dimethyl formamide, N, N-dimethylacetamide, N, N-diethyl formamide and urea; the component B is one or more of lithium carbonate, sodium carbonate, potassium carbonate, cesium carbonate, calcium carbonate and magnesium carbonate; and the component C is 1-butyl-3-methylimidazolium tetrafluoroborate and / or 1-butyl-3-methylimidazolium hexafluorophosphate, and the component C is 1-butyl-3-methylimidazolium hexafluorophosphate. According to the present invention, the components of the catalyst have the mutual synergistic promotion effect, the reaction substrate can be adsorbed and activated, the reaction condition is mild, the product yield is high, the catalyst can be recovered and regenerated, and the environmental pollution is low.

The invention relates to a synthesis method of 3-chloro-2-hydrazinopyridine. According to the method, 2, 3-dichloropyridine and hydrazine hydrate are used as raw materials, potassium carbonate is used as alkali, and the 3-chloro-2-hydrazinopyridine is obtained at a high yield under the condition of a certain pressure. The method has the advantages that the dosage of hydrazine hydrate can be effectively reduced, the problem of excessive hydrazine hydrate in the synthesis process of 3-chloro-2-hydrazinopyridine is solved, and the method has the advantages of atom economy, simple and feasible process, convenience in three-waste treatment, high product yield and purity and the like, and is suitable for industrial production of 3-chloro-2-hydrazinopyridine.

The invention relates to a preparation method of 4, 4 '-bis (3-aminophenoxy) biphenyl, and relates to the technical field of organic synthesis. The method comprises the following steps: adding m-fluoronitrobenzene, potassium carbonate, biphenol and a mixed solvent into a water separation device for reaction; after the reaction is finished, filtering, carrying out reduced pressure distillation, adding an ethanol solution of toluene, pulping and filtering; adding pure water into the filter cake for pulping, thermally filtering and drying to obtain an intermediate 1; adding the intermediate 1, a hydrogenation catalyst, a phase transfer catalyst and tetrahydrofuran into an autoclave for reaction, filtering, performing rotary evaporation on filtrate, adding methanol for pulping, filtering and drying to obtain 4, 4 '-bis (3-aminophenoxy) biphenyl; the phase transfer catalyst is prepared from allyl trimethyl ammonium chloride, 4-vinylbenzene-15-crown ether-5, isopropanol, azodiisobutyronitrile and an ethylene boron anhydride pyridine complex; the yield and the purity of the 4, 4 '-bis (3-aminophenoxy) biphenyl can be remarkably improved, and the method is suitable for industrial production.

This application belongs to the field of inorganic chemical waste recycling and fluoride preparation technology, specifically relating to a method for preparing potassium fluorotitanate from hydrofluoric acid waste liquid. The method includes: S1. Pretreatment of hydrofluoric acid waste liquid and titanic acid powder; S2. Adding the pretreated hydrofluoric acid waste liquid and titanic acid powder to a reaction vessel to generate a fluorotitanic acid solution; S3. Adding potassium carbonate to the fluorotitanic acid solution to generate potassium fluorotitanate, followed by purification of the reaction solution to obtain potassium fluorotitanate crystals; S4. Washing and drying the potassium fluorotitanate crystals to obtain a high-purity potassium fluorotitanate product. This application uses titanic acid powder as the titanium source and optimizes reaction parameters to achieve the dual goals of resource recovery from hydrofluoric acid waste liquid and low-cost preparation of high-purity potassium fluorotitanate.

The invention provides a supported composite catalyst for production of N-methyl o-fluoroaniline, a carrier is Al2O3, and active components are K2CO3, MgO and Cu. The invention discloses a preparation method of a supported composite catalyst. The preparation method comprises the following steps: step 1, dissolving potassium carbonate and magnesium nitrate with preset mass in absolute ethyl alcohol to obtain primary steeping liquor; dissolving cupric acetate in absolute ethyl alcohol to obtain a secondary steeping liquor; step 2, adding Al2O3 into the primary steeping liquor to be fully infiltrated, and drying to obtain a first precursor; step 3, adding the first precursor into the secondary impregnation liquid for full infiltration, and drying to obtain a second precursor; step 4, performing high-temperature roasting on the second precursor, and then cooling the second precursor to room temperature to obtain a K2CO3-MgO-CuO / Al2O3 intermediate; 5, the K2CO3-MgO-CuO / Al2O3 intermediate is subjected to hydrogen reduction at the high temperature, K2CO3-MgO-Cu / Al2O3 is obtained, and the supported composite catalyst is obtained. The catalyst provided by the invention can significantly increase the reaction speed, has less side reactions, and has high stability.

This invention relates to the field of inorganic photochromic materials, specifically to an inorganic photochromic material, its preparation method, and its applications. Compared with existing technologies, the preparation method provided by this invention uses potassium carbonate, bismuth oxide, and titanium dioxide in a molar ratio of potassium, bismuth, and titanium of 1:3:4-x as raw materials, where 0≤x≤1, and calcines at a high temperature of 900℃~1000℃ to prepare an inorganic photochromic material with good photochromic properties and reversibility. The preparation method of this invention is simple, the raw materials are readily available, and the preparation cost is low. Furthermore, the irradiation light source required for the prepared inorganic photochromic material is a common 365nm ultraviolet light source, resulting in low application cost. Therefore, it solves the technical problem that existing inorganic photochromic materials cannot be applied to large-scale industrial applications. Experimental results show that the inorganic photochromic material prepared by the method of this invention can be successfully used to prepare anti-counterfeiting and encryption materials.

This invention provides a method for manufacturing supercapacitor carbon materials that can improve safety during the preparation of supercapacitor carbon materials by inactivating highly flammable alkali metals into safe potassium carbonate. [Solution] The manufacturing method includes the steps of: (A) applying a first heat treatment to heavy oil to form a soft carbon precursor structure having a mesophase structure ratio exceeding 50%, a quinoline insoluble content of 95% to 98%, and a toluene insoluble content of 89% to 91%; (B) polishing and classifying the soft carbon precursor structure, then mixing it with an activator and an inactivator to form a mixture; (C) performing activation and carbonization treatments; (D) removing residual activator, neutralizing it by pickling and washing with water, and then drying it at 90°C for at least 16 hours to obtain an activated carbon material; and (E) applying a second heat treatment to the activated carbon material to form a supercapacitor carbon material.

The invention belongs to the technical field of organic ultrathin nanomaterials, and particularly relates to a photoresponse type polymer ultrathin nanosheet as well as a preparation method and application thereof. The preparation method comprises the following steps: (1) adding dicyclohexylcarbodiimide, N-hydroxysuccinimide, N, N-diisopropylethylamine and 4-carboxyl phenylboronic acid pinacol ester into a solvent, and reacting to obtain an intermediate product; (2) carrying out heating reaction on the intermediate product, triethylene glycol and a catalyst to obtain a phenylboronic acid pinacol ester derivative; (3) adding 4, 4-dibromo azobenzene, a phenylboronic acid pinacol ester derivative, a palladium catalyst and potassium carbonate into a solvent for reaction to obtain an amphiphilic alternating copolymer; and (4) dispersing the amphiphilic alternating copolymer in a solvent for self-assembly to obtain the amphiphilic alternating copolymer. According to the invention, a photoresponse group azobenzene structure is introduced into a polymer main chain, so that the ultrathin organic material is endowed with a unique photoresponse characteristic; the method is simple and easy to implement, good in repeatability and high in stability.

The application discloses a cast iron enamel low-temperature ground glaze free of fluorinated salt and nitrate, a preparation method and application thereof, and belongs to the technical field of enamel. The ground glaze is prepared from quartz, zero-water borax, soda ash, potassium carbonate, barium carbonate, potassium feldspar, magnesium carbonate, copper oxide, manganese oxide, aluminum oxide and recycled ternary battery positive electrode material according to specific mass proportions. The preparation comprises raw material mixing, smelting at 1230±10 DEG C under a pure oxygen environment, and rapid cooling after wire drawing detection of the smelting state. The ground glaze completely avoids the use of fluorinated salt and nitrate, eliminates the problems of fluoride emission and environmental protection equipment blockage from the source, the fluorine content of the product is not detected, and the limit value requirement of the EU REACH regulation is met. Meanwhile, by introducing the recycled ternary battery material, the adhesion of the ground glaze is obviously enhanced, the synergistic effect between components is strengthened, other performances are promoted, and resource recycling and cost reduction are realized.

This invention discloses a method for preparing hollow metal sulfides based on a mild template method using calcium carbonate. Calcium chloride powder and potassium carbonate powder are uniformly dispersed separately in an alcohol solution. The two solutions are then mixed and allowed to stand for aging to obtain solution A. Simultaneously, thioacetamide is dissolved in the alcohol solution to obtain solution B, and a chloride is dissolved in the alcohol solution to obtain solution C. The chloride is either stannous chloride or copper chloride. Then, solutions B and C are added sequentially to solution A at a molar ratio of thioacetamide to chloride of 2:1 and mixed uniformly to obtain solution D. Solution D is then placed in a polytetrafluoroethylene (PTFE) reactor and reacted at 140–180°C for 12 hours. Carbon dioxide is then continuously bubbled through the reactor for 2–3 hours. The mixture is filtered and washed with water and ethanol to obtain the hollow metal sulfides. This invention can obtain hollow metal sulfides with different morphologies and avoids the contamination problems associated with high-temperature calcination or acid dissolution for template removal.

The application discloses a steel plate enamel medium-temperature cobalt-nickel ground glaze free of fluorinated salt and nitrate, a preparation method and application thereof, and belongs to the technical field of enamel. The ground glaze is prepared according to specific mass proportions of quartz, zero-water borax, soda ash, potassium carbonate, calcium carbonate, potassium feldspar, copper oxide, iron oxide and recovered ternary battery positive material iron oxide. The preparation comprises raw material mixing, smelting at 1260±10 DEG C under a pure oxygen environment, and rapid cooling after wire drawing detection of a molten state. The ground glaze completely avoids the use of fluorinated salt and nitrate, eliminates fluorine emission and environmental protection equipment blockage problems from the source, the fluorine content of the product is not detected, and the product meets the limit value requirements of the EU REACH regulation. Meanwhile, by introducing the recovered ternary battery material, the adhesion of the ground glaze is obviously enhanced, the synergistic effect between components is strengthened, other performances are promoted, and resource recycling and cost reduction are realized.

The invention discloses waste textile cellulose and lignin-based porous carbon for a super capacitor and a preparation method thereof, and belongs to the technical field of preparation of grade capacitor carbon. According to the invention, lignin and waste textile cellulose are carbonized and activated in one step by using a simple and green composite activator, potassium carbonate is used as an activator, urea is used as an activator and an N dopant, and the electrode prepared from the carbon material has a pore structure dominated by mesopores and micropores, and has excellent capacity and rate capability; the purpose of improving the energy density and the power density of the super-capacitor electrode is achieved. According to the method, the biological waste lignin and the waste textile cellulose are utilized in a high-valued manner to prepare the porous carbon, so that the problems of poor conductivity and low carbon yield of an amorphous carbon material in the current supercapacitor electrode preparation are solved, and the effective unit capacity and the rate capability of a supercapacitor device are improved.

The application discloses a production process of electroplating grade potassium pyrophosphate, which uses potassium carbonate and diaphosphorus pentoxide as raw materials, and adds a catalyst to react in a high-pressure reaction kettle. After the reaction is completed, water is added for dissolution, and the pH value of the slurry is controlled to be 9.0-10.0. After being filtered through a precision filter, the slurry is punched into a slurry storage tank, and the slurry storage tank is maintained at 75-95 DEG C. The slurry in the storage tank is punched into an evaporation and concentration device for concentration, and then the concentrated liquid is punched into a continuous crystallization device for continuous crystallization operation. After centrifugal treatment, the filtrate is recycled into the evaporation and concentration device. The potassium pyrophosphate crystals are subjected to vacuum drying treatment in a vacuum drying equipment, and then are packaged into finished products after being crushed and sieved. The potassium pyrophosphate crystals obtained by the application have high purity, less caking phenomenon, and stable and controllable product quality.

The invention relates to the technical field of LEDs, in particular to a preparation method of an LED and the LED, and the method comprises the following steps: accurately weighing high-purity potassium carbonate, zinc oxide, ammonium dihydrogen phosphate and manganese carbonate, carrying out ball-milling mixing, and then carrying out segmented sintering in a crucible; volatile gas is removed through a muffle furnace calcination primary reaction, and a KZnPO4: Mn < 2 + > crystal is formed at 500-600 DEG C through a secondary reaction; after cooling, grinding to obtain powder of 5-20 microns, and washing and drying for later use. An ultraviolet LED chip is fixed on a substrate through conductive adhesive, an electrode is welded, fluorescent powder and epoxy resin are mixed to prepare adhesive, the adhesive is sprayed on the surface of the chip in an electrostatic mode after vacuum defoaming, and step curing is carried out for 1-3 hours. And finally, covering a transparent silica gel lens doped with a KZnPO4: Mn < 2 + > nanosheet on the cured coating to construct an integrated luminous structure. Therefore, the problems of low LED luminous efficiency, poor thermal stability, short device life, low light extraction efficiency and the like are solved.

According to the preparation method, a co-sintering pretreatment step is added, potassium carbonate and urea are co-sintered at a limited temperature to form a eutectic mixture, so that a nitrogen-containing group (such as NH3) generated by urea decomposition and the potassium carbonate are synergistically embedded into a carbon skeleton precursor, and the carbon skeleton precursor is formed. Meanwhile, urea decomposition provides a nitrogen source, efficient nitrogen doping is achieved, the nitrogen doping efficiency is improved by 50% or above compared with a traditional process, continuous production can be achieved, the production efficiency is improved, continuous activation of the rotary furnace is matched with segmented temperature control, construction of a micropore-dominated hierarchical pore structure (the micropore rate is larger than 85%) is facilitated, and the specific surface area is increased; the capacitance carbon prepared by the method has the advantages of high specific surface area, reasonable pore size distribution and the like, the specific capacitance can reach 220F / g and is increased by 40% compared with that of an undoped sample, the tap density is greater than or equal to 0.4 g / cm, and the specific capacitance is increased by 30%.

The invention belongs to the technical field of chemical analysis and detection, and provides a bimodal fluorescent probe and a preparation method and application thereof in hypochlorous acid detection, the chemical formula of the bimodal fluorescent probe is C68H44N2, and the preparation method comprises the following steps: weighing 2, 7-dibromo-9-fluorenone, 1-(4-phenylboronic acid pinacol ester)-1, 2, 4-triazole-1-one, 2, 4-triazole-1-one, 2, 4-triazole-1-one, 2, 4-triazole-1-one, 2, 4-triazole-1-one, 2, 4-triazole-1 The preparation method comprises the following steps: putting 1, 1, 2-triphenylethylene, a tetra (triphenylphosphine) palladium catalyst and potassium carbonate into a three-neck flask; sequentially injecting methylbenzene, absolute ethyl alcohol and water; carrying out heating reflux reaction, cooling to room temperature, carrying out extraction separation by using dichloromethane, collecting an organic phase, drying, carrying out rotary evaporation concentration to obtain a crude product, and purifying to obtain TPEO; dissolving TPEO and malononitrile in anhydrous dimethyl sulfoxide under the protection of argon, heating and stirring to react, cooling to room temperature, carrying out suction filtration, and washing the precipitate; the bimodal fluorescent probe can be applied to detection of hypochlorous acid, and has the advantages of specific selectivity, high sensitivity, wide detection concentration, high accuracy and the like.

The application discloses a steel plate enamel high-temperature acid-resistant ground enamel free of fluorinated salt and nitrate, a preparation method and application thereof, and belongs to the technical field of enamel. The ground enamel is composed of quartz, titanium white powder, zero-water borax, soda ash, potassium carbonate, calcium carbonate, potassium feldspar, lithium carbonate, copper oxide, iron oxide and recycled ternary battery positive material according to specific mass proportions. The preparation comprises the steps of raw material mixing, high-temperature smelting under pure oxygen condition, wire drawing detection and rapid cooling. The ground enamel is completely free of fluorinated salt and nitrate, avoids fluorine emission and environmental protection equipment blockage problems from the source, the fluorine content of the product is not detected through detection, and the product meets the requirements of the EU REACH regulation. Meanwhile, by introducing the recycled ternary battery material, the adhesion of the ground enamel is obviously enhanced, the synergistic effect between components is strengthened, other performances are promoted, and resource recycling and cost reduction are realized.