863 results about "Potassium carbonate" patented technology

The invention discloses a fluoride salt-free nitrate-free cast iron enamel semitransparent glaze as well as a preparation method and application thereof, and belongs to the technical field of enamel. The semitransparent glaze is prepared from quartz, anhydrous borax, sodium carbonate, potassium carbonate, calcium carbonate, potassium feldspar, zinc oxide, lithium carbonate, zirconium silicate, titanium dioxide, aluminum oxide, trisodium phosphate, antimony oxide, magnesium carbonate and barium carbonate according to a specific mass ratio. The preparation method comprises the steps of raw material mixing, high-temperature melting under a pure oxygen condition, wiredrawing detection, quenching and the like. The semitransparent glaze is completely free of fluoride salt and nitrate, the problems of fluoride emission and environmental protection equipment blockage are avoided from the source, the fluorine content of the product is not detected through detection, the product meets the requirements of European Union REACH regulations, meanwhile, the product has good porcelain surface, luster and low-temperature firing adaptability, and is suitable for cast iron matrixes, the firing temperature is 740-760 DEG C, and the firing time is 2-3 hours. The method can be used for producing green and environment-friendly enamel products.

The invention discloses polyether-ether-ketone resin with adjustable molecular weight distribution as well as a synthesis method and application of the polyether-ether-ketone resin. The synthesis method comprises the following steps: preparing polyether-ether-ketone resin in the presence of carbonate and / or bicarbonate of alkali metal; wherein the carbonate and / or bicarbonate of the alkali metal comprises sodium carbonate and potassium carbonate, and the sodium carbonate has gradient particle size distribution. According to the invention, sodium carbonate with specific particle size distribution is used to regulate and control the reaction rate to be stable and continuous, so that the molecular weight distribution of the polymer presents a narrower distribution form. Therefore, the molecular structure is uniform, the molecular form is uniform, the physical and chemical properties, including mechanical strength, thermal stability and chemical stability, of the material can be improved, and particularly, the thermal stability of the material is improved most remarkably.

The invention relates to the technical field, in particular to an ultralight foamed ceramic hollow sphere prepared from iron lepidolite tailings and a preparation method and application of the ultralight foamed ceramic hollow sphere. The foamed ceramic hollow sphere is prepared from the following raw materials: iron lepidolite tailings, silicon carbide, bentonite, sodium carbonate and potassium carbonate; in percentage by mass, the content of the iron lepidolite tailings is 90 to 96.4 percent; the content of the silicon carbide is 0.1-1%; the iron lepidolite tailings are prepared from the following components in percentage by mass: 77 to 80 percent of SiO2, 10 to 13 percent of Al2O3, 1.3 to 1.6 percent of Fe2O3 and 0.1 to 0.17 percent of Li2O. The ultralight foamed ceramic hollow sphere is prepared by using the iron lepidolite tailings, the silicon carbide, the bentonite, the sodium carbonate and the potassium carbonate as raw materials, can meet various market requirements of heat preservation, heat insulation, sound insulation, noise reduction and the like, and brings remarkable economic benefits and social benefits.

The invention relates to the technical field of piezoelectric light-transmitting functional ceramics, and discloses a high-light-transmitting ceramic material and a preparation method thereof.The preparation method comprises the following preparation steps that sodium carbonate, potassium carbonate, niobium pentoxide, antimony trioxide, samarium oxide and zirconium dioxide powder raw materials are taken, and after primary ball milling and drying are conducted on the powder raw materials, mixed powder is obtained; carrying out pre-sintering and secondary ball milling on the mixed powder, carrying out compression molding to form a tablet, and sintering and polishing the tablet to obtain a ceramic matrix; and spraying the composite slurry to the surface of a ceramic matrix, carrying out heat treatment, and cooling to room temperature to obtain the high-transmittance ceramic material. The antimony trioxide, the samarium oxide and the zirconium dioxide are co-doped, an antimony-samarium-zirconium liquid phase is generated in the ceramic material, pores of the ceramic material are filled and eliminated, and the prepared ceramic material has excellent optical transmittance, piezoelectric property and mechanical strength.

The invention discloses a crown ether functionalized covalent organic framework material as well as a preparation method and application thereof, and the method comprises the following steps: adding a covalent organic framework material, 4-bromobenzo-15-crown-5, potassium carbonate and potassium iodide into an acetone solution for reaction, washing the obtained crude product, performing Soxhlet extraction with tetrahydrofuran for a certain time, and drying to obtain the crown ether functionalized covalent organic framework material. The crown ether functionalized covalent organic framework material is obtained. Compared with a synthesis method of crown ether functionalized COFs in the prior art, the method has the advantages that the crown ether (4-bromobenzo-15-crown-5) can be grafted to the COFs in one step, the Na < + > adsorption capacity and the adsorbent recycling performance are greatly improved, the synthesis method is simple, and synthesis of the crown ether functionalized COFs is greener, more convenient and more economical.

The invention discloses fluoride-salt-free and nitrate-free high-temperature acid-resistant translucent glaze for steel plate enamel as well as a preparation method and application of the translucent glaze, and belongs to the technical field of enamel. The semitransparent glaze is prepared from quartz, anhydrous borax, titanium dioxide, trisodium phosphate, potassium carbonate, lithium carbonate, aluminum oxide, zinc oxide and sodium carbonate according to a specific mass ratio. The preparation method comprises the steps of raw material mixing, high-temperature melting under a pure oxygen condition, wiredrawing detection, quenching and the like. The semitransparent glaze is completely free of fluoride salt and nitrate, the problems of fluoride emission and environmental protection equipment blockage are avoided from the source, the fluorine content of the product is not detected through detection, the product meets the requirements of European Union REACH regulations, meanwhile, the product has good porcelain surface, luster and firing adaptability, is suitable for a steel plate matrix, has the firing temperature of 840-880 DEG C and the firing time of 820-830 minutes, and is suitable for a steel plate. The method can be used for producing green and environment-friendly enamel products.

The invention discloses a sliding plate brick and a preparation method thereof, and relates to the technical field of sliding plate bricks. The sliding plate brick comprises the following raw materials in parts by weight: 30-50 parts of tabular corundum, 20-30 parts of white corundum, 8-12 parts of graphite, 2-5 parts of carbon black, 3-5 parts of metal aluminum powder, 4-6 parts of a binder and 2-4 parts of silicon carbide. The preparation method comprises the following steps: reacting hydroxyl in sodium alginate with chlorine atoms in 4-chlorophenylboronic acid under the action of potassium carbonate to generate boric acid modified sodium alginate; boric acid bonds in the boric acid modified sodium alginate react with hydroxyl groups in tannic acid to generate tannic acid composite sodium alginate; hydroxyl in the tannic acid composite sodium alginate reacts with silicon hydroxyl in the triphenyl hydroxysilane under the action of phosphoric acid to generate the binder. The prepared sliding plate brick has good compression strength and high-temperature fracture resistance.

The invention discloses a fluoride-salt-free and nitrate-free cast iron enamel zirconium white glaze as well as a preparation method and application thereof, and belongs to the technical field of enamel. The zirconium white glaze is prepared from quartz, borax pentahydrate, magnesium carbonate, potassium carbonate, potassium feldspar, zinc oxide, aluminum hydroxide, calcium carbonate, zirconium silicate, sodium tripolyphosphate and lithium carbonate according to a specific mass ratio. The preparation method comprises the steps of raw material mixing, high-temperature melting under a pure oxygen condition, wiredrawing detection, quenching and the like. The zirconium white glaze is completely free of fluoride salt and nitrate, the problems of fluoride emission and environmental protection equipment blockage are avoided from the source, the fluorine content of the product is not detected through detection, the product meets the requirements of European Union REACH regulations, and meanwhile, the zirconium white glaze has good porcelain surface, luster and firing adaptability, is suitable for cast iron matrixes, has the firing temperature of 740-760 DEG C and the firing time of 87-87 hours, and can be widely applied to cast iron substrates. The method can be used for producing green and environment-friendly enamel products.

The invention belongs to the technical field of coal combustion, and particularly relates to an environment-friendly rare earth catalyst as well as a preparation method and application thereof in promoting coal combustion. The catalyst is prepared from composite rare earth oxide, calcium oxide, potassium carbonate, ferrous sulfate, kaolin, diatomite and a multi-component composite assistant component in a specific proportion through the steps of slurry ultrasonic activation, rare earth coating, assistant step-by-step doping, microwave drying, protective atmosphere roasting and the like. The catalyst is unique in structure and good in dispersity, the coal combustion efficiency can be remarkably improved, the burnout temperature and the carbon content of fly ash are reduced, emission of flue gas pollutants such as CO, NOx and SO2 is effectively reduced, and the catalyst is suitable for the fields of energy conservation, carbon reduction and environment-friendly treatment of coal-fired power plants and industrial boilers.

The invention discloses nano-engineered microalgae for photoimmunotherapy of melanoma and a preparation method of the nano-engineered microalgae. The preparation method comprises the following steps: S1, respectively putting tannic acid, potassium carbonate, sodium citrate and HAuCl4. 3H2O into water to prepare a tannic acid solution with the concentration of 4.3 mg / mL, a potassium carbonate solution with the concentration of 20.7 mg / mL, a sodium citrate reduction solution with the concentration of 0.7 mg / mL and a HAuCl4 solution with the concentration of 10.0 mg / mL; s2, dissolving a tannic acid solution and a potassium carbonate solution in the sodium citrate reduction solution to obtain a mixed solution; s3, the mixed solution is heated under stirring, a HAuCl4 solution is dropwise added, stirring continues, and AuNP is obtained; and S4, mixing the AuNP obtained in the step S3 with the microalgae PCC 7942, standing, incubating, and centrifugally washing, so as to obtain the nano-engineered microalgae PCC-coated AuNP. The functionalized microalgae drug delivery system (PCC-coated AuNP) prepared by the invention has the performance of respectively generating O2 and H2 through photosynthesis and photocatalytic reaction under the irradiation of 635 nm red light.

The invention discloses fluoride-salt-free and nitrate-free low-temperature pearlescent glaze for steel plate enamel as well as a preparation method and application of the pearlescent glaze, and belongs to the technical field of enamel. The pearlescent glaze is prepared from quartz, anhydrous borax, titanium dioxide, magnesium carbonate, sodium tripolyphosphate, potassium carbonate, lithium carbonate, potassium feldspar, zinc oxide and V-26 according to a specific mass ratio. The preparation method comprises the steps of raw material mixing, high-temperature melting under a pure oxygen condition, wiredrawing detection, quenching and the like. The pearlescent glaze is completely free of fluoride salt and nitrate, the problems of fluoride emission and environmental protection equipment blockage are avoided from the source, the fluorine content of the product is not detected through detection, the product meets the requirements of European Union REACH regulations, meanwhile, the pearlescent glaze has good porcelain surface, luster and low-temperature firing adaptability, is suitable for a steel plate matrix, has the firing temperature of 760-800 DEG C and the firing time of 10-20 minutes, and is suitable for a steel plate. The method can be used for producing green and environment-friendly enamel products.

The invention discloses fluoride-salt-free and nitrate-free low-temperature acid-resistant translucent glaze for steel plate enamel as well as a preparation method and application of the translucent glaze, and belongs to the technical field of enamel. The semitransparent glaze is prepared from quartz, anhydrous borax, titanium dioxide, trisodium phosphate, potassium carbonate, lithium carbonate, aluminum oxide, zinc oxide and sodium carbonate according to a specific mass ratio. The preparation method comprises the steps of raw material mixing, high-temperature melting under a pure oxygen condition, wiredrawing detection, quenching and the like. The semitransparent glaze is completely free of fluoride salt and nitrate, the problems of fluoride emission and environmental protection equipment blockage are avoided from the source, the fluorine content of the product is not detected through detection, the product meets the requirements of European Union REACH regulations, meanwhile, the product has good porcelain surface, luster and low-temperature firing adaptability, and is suitable for steel plate substrates, the firing temperature is 760-800 DEG C, and the firing time is 2-3 hours. The method can be used for producing green and environment-friendly enamel products.

The invention relates to the technical field of coatings, in particular to a low-temperature curing type fluorocarbon coating for an aluminum alloy and a preparation method of the low-temperature curing type fluorocarbon coating. The preparation method comprises the following steps: adding eugenol, potassium carbonate and decafluorobiphenyl to obtain modified biphenyl; and adding m-chloroperoxybenzoic acid to prepare the reinforcing agent. And performing surface modification on the linear silicon dioxide filler, the flaky silicon dioxide filler and the dendritic silicon dioxide filler by using gamma-epoxypropoxy propyl trimethoxy silane to obtain the epoxy modified wear-resistant filler. The preparation method comprises the following steps: adding epoxy resin and the epoxy modified wear-resistant filler into xylene, ultrasonically stirring, adding fluorocarbon resin, a reinforcing agent and a curing agent, and continuously ultrasonically stirring to obtain the fluorocarbon coating. The fluorocarbon coating prepared by the invention has good adhesion performance, wear resistance and mechanical strength, so that the fluorocarbon coating has a wide application prospect in the technical field of coatings.

The invention relates to the technical field of heat storage materials, in particular to a simulation method for strengthening the heat storage performance of molten salt by using nano-particle oxygen vacancy defects. The method comprises the following steps: constructing a unit cell structure of silicon dioxide, determining a nanoparticle model containing a surface oxygen vacancy defect based on the unit cell structure of silicon dioxide, and constructing a final silicon dioxide-potassium carbonate nanofluid model based on the nanoparticle model containing the surface oxygen vacancy defect; performing molecular dynamics simulation based on the final silicon dioxide-potassium carbonate nanofluid model to obtain molecular dynamics simulation data; based on molecular dynamics simulation data, the final heat storage performance parameters of the silicon dioxide-potassium carbonate nanofluid model are determined, and by means of the setting mode, results obtained through simulation discover that the heat storage performance of the molten salt can be effectively improved through nano-particle oxygen vacancy defects.

The invention discloses a lignin-based hydrogel water-retaining agent as well as a preparation method and application thereof, and belongs to the technical field of soil water retention improvement. The preparation method provided by the invention comprises the following steps: dissolving lignin under an alkaline condition to form a uniform solution; adding a polymerization reaction monomer into the uniform solution, stirring and mixing, sequentially adding an initiator, an accelerant, a cross-linking agent and a regulator, and stirring and reacting to obtain a reaction solution; the regulator is selected from one or more of clay, zeolite, ammonium bicarbonate, potassium carbonate or calcium superphosphate; injecting the obtained reaction liquid into a mold, and performing ultrasonic treatment to form hydrogel; the hydrogel is cleaned and aged, and the hydrogel is obtained. The preparation method is simple, environmentally friendly, low in energy consumption, short in process, wide in raw material source, low in cost and suitable for industrial production, and the obtained lignin-based hydrogel water-retaining agent is free of toxicity and pollution and has excellent water absorption performance and biodegradability.

The invention relates to a specific PET molecular probe of a targeted KRASG12D mutant as well as a preparation method and application of the specific PET molecular probe. Pyridopyrimidine compounds and R5 are subjected to cooling reaction under the action of N, N-diisopropylethylamine to generate a compound 2; the compound 2 and (2-fluorotetrahydro-1H-pyrrolizine-7A (5H)-yl) methanol are subjected to a heating reaction under the action of N, N-diisopropylethylamine, and a compound 3 is generated; carrying out heating reaction on the compound 3 and biphenyl boronic acid pinacol ester under the action of N, N-diisopropylethylamine and tetrakis (triphenylphosphine) palladium to generate a compound 4; carrying out heating reaction on the compound 4 and 1, 2-bis (tolyloxy) alkane under the action of potassium carbonate to generate a compound 5; the compound 5, radioisotope < 18 > F and an anion complexing agent are subjected to a heating reaction under the action of potassium carbonate to generate the trisubstituted pyridopyrimidine < 18 > F labeled PET molecular probe. Compared with the prior art, the kit has a positioning diagnosis effect on KRASG12D mutant tumors, and image typing of mutant and non-mutant tumors and pathological evaluation after tumor treatment are realized at the same time.

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 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 relates to a resourceful treatment method for a bauxite ore washing tail mud reservoir, which comprises the following specific steps: 1, carrying out cyclone classification on tail mud in the tail mud reservoir, and separating out coarse particles with A / S greater than or equal to Y and A / Slt; and Y fine particles. And 2, carrying out flotation treatment on the coarse particles. And potassium carbonate is added as a dispersing agent and a pH value adjusting agent, the pH value of the ore pulp is adjusted to 8.0-10.5, then sodium oleate is added as a collecting agent, and finally bauxite concentrate and flotation tailings are obtained. And 3, dehydrating the fine particles to obtain dehydrated tail mud with the water content of less than or equal to 20%. And 4, adding the flotation tailings and the dehydrated tail mud into a curing agent or a soil conditioner to form cultivable soil which is used for ecological restoration of the stony desertification area. Potassium carbonate is used for replacing sodium carbonate to reinforce flotation, so that tailings can be used as potassium-rich cultivation soil; the dam break risk can be eliminated after the tail mud is dehydrated; tailings and fine particles are compounded to form cultivation soil to treat stony desertification, silicon fertilizer is synchronously produced, the annual income is larger than or equal to 0.3 million yuan, and safe, resource and ecological cooperative treatment is achieved.

The invention provides a preparation method of biomass-derived porous carbon with ionic adsorption potential, which comprises the following steps: adding disodium ethylene diamine tetraacetate and ferrous chloride into water, and uniformly mixing to obtain EDTA-Fe; the preparation method comprises the following steps: sequentially adding an acetic acid-sodium acetate buffer solution and a biomass material into EDTA-Fe, uniformly mixing, adding aluminum chloride, carrying out a hydrothermal reaction to obtain a primary product, cleaning the primary product, and drying to obtain biomass hydrothermal carbon; the preparation method comprises the following steps: soaking biomass hydrothermal carbon in a saturated solution of potassium carbonate, then carrying out solid-liquid separation, firstly drying a solid obtained by separation, then calcining in a nitrogen atmosphere, and cleaning to obtain the biomass derived porous carbon. The biomass hydrothermal carbon prepared by the method has regular and controllable morphology, abundant surface functional groups and a stable carbon skeleton structure, and shows excellent electrochemical performance.

The invention provides a method for determining boron element in iron ore, which comprises the following steps: weighing 0.2 g of sample, uniformly mixing with a flux, heating to red at 700-800 DEG C, cooling, adding sodium peroxide for secondary melting, dissolving in water, and transferring to a beaker; adding ethanol to boil, fixing the volume to 500mL, filtering and taking 100mL, adjusting the pH value, adding hydrogen peroxide to slightly boil, cooling, adding barium carbonate to boil, diluting and filtering, and taking 25mL for color development determination. According to the method, sodium carbonate and / or potassium carbonate and sodium peroxide are adopted to form a composite flux, an iron ore sample is completely decomposed through secondary melting and step-by-step dissolution, and the sample decomposition efficiency is improved; the method is stable in recovery rate, is superior to a conventional method in precision, can accurately measure the boron content in the iron ore, meets the technical requirements on boron element detection in the fields of ferrous metallurgy, geological exploration and the like, provides an efficient and reliable detection means for boron content analysis, and ensures the accuracy and reproducibility of a detection result.

Fabricating a composite for direct air capture of carbon dioxide includes soaking an activated carbon material in an aqueous solution that includes potassium carbonate to yield an infused activated carbon material, removing the infused activated carbon material from the aqueous solution, drying the infused activated carbon material to yield a dried activated carbon material, and equilibrating the dried activated carbon material in air for a length of time, thereby increasing the porosity of the dried activated carbon material to yield the composite for direct air capture of carbon dioxide.

The invention relates to the technical field of adhesives, in particular to a solvent-free two-component polyurethane adhesive which is composed of a component A and a component B, the component A is prepared from the following raw materials: microalgae grease, hydrogen peroxide, formic acid, a nickel-based catalyst, bio-based furan diamine, a bio-based maleimide derivative, dimethyl carbonate, an ionic liquid catalyst, vanillin, lipase and furfuryl alcohol; the raw materials of the group B comprise nano cellulose, vanillin, polyethyleneimine, a bio-based material, potassium carbonate, a self-repairing agent and an antibacterial agent. The preparation method of the adhesive comprises the following steps: S1, preparing microalgae oil-based polyol; s2, preparing dynamic crosslinking type isocyanate; s3, synthesizing a dynamic prepolymer of the component A; s4, modifying the nano cellulose; s5, the bio-based HDI and vanillin are mixed and then react at 60 DEG C, potassium carbonate is added for catalysis, and the closed curing agent is obtained; and S6, preparing a component B curing agent. The problems that the main raw materials of the double-component polyurethane adhesive are non-renewable and are not beneficial to environmental protection during application are well solved.

The invention relates to the technical field of concrete materials, and discloses modified epoxy resin and a preparation method thereof, a composition for an epoxy resin grouting material, the epoxy resin grouting material and a preparation method and application of the epoxy resin grouting material. The method for preparing the modified epoxy resin comprises the following steps: heating a polyhydroxy compound and epoxy resin at 80-100 DEG C in a nitrogen atmosphere in the presence of a catalyst to obtain the modified epoxy resin, the molar ratio of the polyhydroxy compound to the epoxy resin to the catalyst is 1: (1-2): (0.05-0.1); the epoxy resin is bisphenol A epoxy resin; the catalyst is selected from any one of sodium hydroxide, potassium carbonate and dimethylaniline; the multi-hydroxyl compound is selected from at least one of glycerol, ethylene glycol, propylene glycol, glucose and butanediol. The epoxy resin grouting material provided by the invention has more excellent toughness and lower viscosity, and has good bonding strength and bonding durability with a concrete matrix.

The invention belongs to the field of microbial fertilizers, and particularly relates to a compound fertilizer with a microbial coating layer structure and a preparation process of the compound fertilizer. Comprising the following steps: preparing a microbial nutrient adhesive; preparing a quantum dot complex microbial inoculant; and carrying out microbial coating on the nitrogen-phosphorus-potassium fertilizer. Carboxylated active stone powder and konjac glucomannan are mixed and subjected to ultrasonic treatment, potassium carbonate is added, konjac glucomannan is induced to form irreversible gel, and then a shellac solution formed by compounding dewaxed shellac and triethyl citrate is added and compounded with a microbial nutrient adhesive. A mineral skeleton-polysaccharide network-resin enhanced system structure is formed, the strength of the subsequently prepared compound fertilizer with a microbial coating structure is synergistically enhanced, the storage stability of compound microbial bacteria is increased, and the quantity of the compound microbial inoculants is effectively preserved after fertilization, so that soil remediation is promoted, and the soil remediation effect is improved. The disease resistance and the nutrient absorption capability of crops are enhanced, and the growth capability and the quality of the crops are improved.

The invention relates to a microcrystalline plate produced on the basis of hazardous waste incineration ash, which comprises fly ash, bottom slag, silica sand, anhydrous sodium carbonate, sodium nitrate, anhydrous potassium carbonate, sodium fluosilicate, stannic oxide, nickel oxide, cobalt oxide, anhydrous borax, cerium dioxide, manganese dioxide and lanthanum oxide, an all-electric melting glass kiln is adopted for vitrification, a crystallization process adopts a one-step method for crystallization, and the crystallization process adopts a one-step method for crystallization. The fly ash and the bottom slag are obtained by incinerating medical wastes belonging to hazardous wastes in a rotary kiln, and are belonging to hazardous wastes; the method not only helps to solve the problem of disposal of the medical waste incineration ash, but also can promote development of the green building material industry, and conforms to the strategic target of sustainable development.

The invention relates to a method for efficiently degrading phenolic acid autotoxic substances in continuous cropping of crops by using biochar immobilized laccase. Pyrolyzing the tobacco stem and straw powder in a muffle furnace to obtain tobacco stem and straw biochar BC; the preparation method comprises the following steps: soaking BC and potassium carbonate in a mass ratio of 1: 4 for 2-4 hours, drying, pyrolyzing in a muffle furnace after drying, air-cooling to room temperature, washing with deionized water, drying and sieving to obtain potassium carbonate modified tobacco stem and straw biochar CBC; dispersing CBC in an HNO3 solution, mixing for 3-5 hours at the speed of 300rpm and the temperature of 30 DEG C, washing with deionized water until the pH value is 7, drying overnight, and storing at room temperature to obtain functionalized CBC; placing the functionalized CBC in a 50mM phosphate buffer solution for 20-30 hours, adding 1.0% w / v glutaraldehyde with the same volume as the functionalized CBC, oscillating at room temperature, washing with redundant glutaraldehyde deionized water, and drying overnight to obtain glutaraldehyde-containing CBC; and carrying out enzyme immobilization on the glutaraldehyde-containing CBC and a 5-10U / mL laccase solution according to a solid-to-liquid ratio of 1g: 10mL at 25-30 DEG C to obtain the immobilized laccase. Autotoxic substances are effectively degraded, the yield and quality of peppers are improved, and ecological restoration of soil is promoted.

The invention discloses a water treatment filtering material and a preparation method thereof, and relates to the technical field of water treatment. When the water treatment filtering material is prepared, polyacrylonitrile reacts with sodium azide to prepare graft modified polyacrylonitrile; alkali lignin is subjected to chloroethylation, and chlorinated modified lignin is prepared; the preparation method comprises the following steps: hydrolyzing tetrabutyl titanate, doping nickel and iron elements, and growing on a graphene nanosheet in situ to prepare modified titanium dioxide loaded graphene; modifying the graphene loaded with the modified titanium dioxide by using a silane coupling agent to prepare modified graphene; reacting the casting membrane base solution with the modified graphene and potassium carbonate to prepare a casting membrane solution A; reacting the membrane casting base solution with chlorinated modified lignin and polyethyleneimine to prepare a membrane casting solution B; and mixing the membrane casting solution A and the membrane casting solution B, and scraping into a membrane to prepare the water treatment filtering material. The water treatment filtering material prepared by the invention has the advantages of hydrophilicity, oil stain resistance, self-cleaning property, antibacterial property and good filtering property.

The present invention relates to the technical field of drug synthesis, and specifically discloses a method for synthesizing thiamethoxam. The method comprises: a. Reacting 3-methyl-4-nitroimino-1,3,5-oxadiazine with an organic strong base in an organic solvent to form an oxadiazine salt. When the mass content of oxadiazine is lower than 0.5%, an oxadiazine salt reaction solution is obtained; b. Adjusting the pH value of the oxadiazine salt reaction solution to neutral, then adding 2-chloro-5-(chloromethyl)thiazole, and reacting at 50-60°C until the mass content of oxadiazine salt is lower than 0.5% to obtain a thiamethoxam salt reaction solution; c. Adding water to the thiamethoxam salt reaction solution, washing away impurities, cooling, and centrifuging to obtain thiamethoxam. The thiamethoxam synthesis method provided by the present invention no longer uses potassium carbonate, reduces the production cost, reduces the water consumption during product purification, is environmentally friendly, and at the same time avoids the decomposition of 2-chloro-5-(chloromethyl)thiazole under alkaline conditions, improving the reaction yield.

The present invention discloses a method for synthesizing azoxystrobin, which includes: in a water-oil system of an organic solvent and an aqueous solution of trimethylamine, the compound shown in Formula I reacts with 2-cyanophenol to obtain azoxystrobin; wherein, the molar ratio of the compound shown in Formula I to trimethylamine is 1:(0.96-2). The synthesis method of the present invention has higher reaction efficiency, does not generate CO2, avoids the risk of entrainment and overflow of materials, reduces side reactions, reduces solid waste emissions, and is green and environmentally friendly. The present invention does not need to use solid sodium carbonate or potassium carbonate, and the material reaction system is an oil-water reaction system, so the reaction efficiency is greatly improved, and the yield can also be maintained above 95%. It can take into account both efficiency (timeliness) and yield, and is easy to realize continuous reaction, providing technical support for intelligent and unmanned production; and trimethylamine can be recycled, reducing the use of one raw material, and thus does not require cumbersome treatment of mixed salts and their wastewater, and the energy consumption is significantly reduced.