709 results about "Magnesium salt" patented technology

The invention belongs to the technical field of organic pollution treatment, and relates to a biochar-LDH-nZVI-GO composite material for organic pollution remediation and a preparation method and application thereof.The preparation method comprises the steps that graphene oxide is ultrasonically dispersed in deionized water, magnesium salt and aluminum salt are added to form uniform suspension liquid, then the uniform suspension liquid is mixed with biochar suspension liquid, and the biochar-nZVI-GO composite material is obtained; carrying out pH (Potential of Hydrogen) regulation and a hydrothermal crystallization reaction, so as to prepare a biochar-Mg / Al-LDH-GO compound; and dispersing the compound in an organic solvent, sequentially adding FeSO4. 7H2O and a NaBH4 solution in an inert atmosphere to carry out a reduction reaction, and finally washing and drying to obtain the biochar-LDH-nZVI-GO composite material. The material shows high-efficiency removal capacity on various organic pollutants such as trichloroethylene, chlorobenzene and polychlorinated biphenyl, is suitable for high-efficiency green remediation of organic pollutants in soil and water, and has good popularization and application prospects.

The invention discloses an efficient wet desulfurization synergist and a preparation method thereof, and relates to the technical field of flue gas desulfurization. The efficient wet desulphurization synergist comprises the following raw materials in parts by weight: 10-20 parts of sodium formate, 5-10 parts of citric acid, 20-30 parts of binary acid, 5-6 parts of a surfactant, 15-20 parts of magnesium salt, 12-18 parts of sodium salt and 2-5 parts of a pH buffer agent. The preparation method comprises the following steps: reacting cyanuric chloride with lauryl amine to generate a monosubstituted compound; then reacting with L-asparaginic acid to generate a disubstituted compound; reacting with diethylenetriamine to generate a bis-triazine ring compound; and finally, reacting with sodium 2-chloroethanesulfonate to generate the surfactant. The high-efficiency wet desulphurization synergist prepared by the invention has a desulphurization effect.

The invention relates to the technical field of metal amino acid chelate preparation, and discloses high-bioavailability magnesium glycinate and a preparation method thereof.The method comprises the steps that a glycine solution and a magnesium salt solution are mixed, the initial pH value is adjusted to be within the alkaline range, and a low-polarity organic phase is added to construct a two-phase solvent system; dynamically adjusting the pH value of the reaction system by stages, and sequentially inducing amino and carboxyl of glycine to chelate magnesium ions step by step to form a chelate; and blending the chelated product with a chitosan-sodium alginate composite carrier, and carrying out spray drying to obtain magnesium glycinate particles. The molar ratio of magnesium ions to glycine in the chelating structure of magnesium glycinate is 1: 3. Through the synergistic effect of dynamic pH regulation and a two-phase solvent system, directional synthesis of the magnesium glycinate 1: 3 high-coordination chelate is achieved, the bioavailability and the targeted slow release performance are remarkably improved by combining a composite carrier nano embedding technology, and meanwhile, the process is efficient and environmentally friendly.

The present invention relates to a crop nutrition and fortifying composition comprising: i. Elemental sulfur; ii. One or more water insoluble or water soluble magnesium salts or derivatives or mixtures thereof; iii. One or more water-insoluble or water-soluble potash fertilizers or salts or derivatives or mixtures thereof; iv. One or more water insoluble or water soluble iron salts or derivatives or mixtures thereof; v. One or more water insoluble or water soluble zinc salts or derivatives or mixtures thereof; vi. One or more water-insoluble or water-soluble boron salts or derivatives or mixtures thereof; vii. At least one trace element selected from the group consisting of water-insoluble or water-soluble vanadium salts or derivatives or mixtures thereof and water-insoluble or water-soluble selenium salts or derivatives or mixtures thereof; and viii. One or more excipients wherein the composition comprises microparticles having a size in the range of 0.1 to 50 microns, and wherein the total content of the water-soluble salts, derivatives or mixtures in the composition does not exceed 80% of the total weight of the composition. The invention also relates to a method for preparing the crop nutrition and fortifying composition and a method for treating a plant, a seed, a crop, plant propagation material, a locus, parts thereof or soil with the crop nutrition and fortifying composition.

The invention discloses a lanthanum-doped CuMgAl catalyst as well as a preparation method and application thereof, and belongs to the technical field of catalysts. The preparation method of the lanthanum-doped CuMgAl catalyst comprises the following steps: adding a copper salt, a magnesium salt, an aluminum salt and a lanthanum salt into water to obtain a first solution; adding a precipitator into water to obtain a second solution; adding the second solution into the first solution to adjust the pH value to 10.5 to obtain a mixed solution, stirring the mixed solution to generate a co-precipitation reaction, after the reaction is completed, carrying out aging treatment to promote growth and structure ordering of layered double hydroxide crystals, and then carrying out calcination treatment to convert a layered double hydroxide precursor into an oxide, thereby obtaining the layered double hydroxide. And the lanthanum-doped CuMgAl catalyst is obtained. The lanthanum-doped CuMgAl catalyst prepared by the preparation method disclosed by the invention has excellent activity and stability.

The invention relates to a preparation method of a rice leavening with a scalp care effect and a product and application thereof, the preparation method comprises the following steps: mixing a rice raw material, a plant raw material, water, a magnesium salt, a sodium salt and Tween, sterilizing to obtain a fermentation medium, inoculating a compound microbial agent into the fermentation medium, and fermenting to obtain the rice leavening with the scalp care effect. After the fermentation liquid is finished, sterilizing and filtering to obtain a rice leavening; wherein the compound microbial agent comprises a first microbial strain and a second microbial strain; the strains in the first microbial strain comprise a combination of streptococcus thermophilus, bifidobacterium breve and a plant lactobacillus YK-L002 strain; and the second microbial strain comprises a trichosporon YK-S004 strain. According to the invention, specific strains are subjected to compounding and combined fermentation, and the fermentation product filtrate obtained after fermentation treatment of four bacteria has excellent hair care and nourishing effects, and can effectively condition the scalp micro-ecological environment and nourish the hair quality.

The present application provides an electrolytic solution for magnesium batteries, a method for preparing the same, and a magnesium battery, comprising a non-aqueous solvent and an electrolyte salt, wherein the non-aqueous solvent is selected from one or more of imidazole ionic liquids, pyrrole ionic liquids, piperidine ionic liquids, ether compounds, ester compounds, pyridine compounds, nitrile compounds, sulfone compounds, or ketone compounds; the electrolyte salt has a chemical formula [MgmLinXo(HMDS)2m+m−oRp]·Mq. The electrolytic solution for magnesium batteries provided by the present application is endowed with good stability, strong water resistance and impurity resistance, and excellent electrochemical performance under the mutual synergistic effect among the components, and excellent electrochemical performance under the mutual synergistic effect among the components, and at the same time, the electrolytic solution can promote reversible deposition-dissolution of magnesium, reduce the over-potential, inhibit formation of a passivation layer of magnesium salts on the surface of the anode, and increase the charging-discharging specific capacity and cycling stability of the magnesium battery.

The invention discloses a mine water fluorine removal agent and a preparation method and application thereof, and belongs to the technical field of wastewater treatment.The preparation method of the fluorine removal agent comprises the following steps that aluminum salt, calcium salt, magnesium salt and ferric salt are added into water to be stirred, then a chelating agent, a hydroxy carboxylic acid compound and a dispersing agent are added, the mixture is heated to 40-60 DEG C to be stirred and dispersed, and heat preservation is conducted. The preparation method gets rid of the constraint of traditional calcium salt, introduces the chelating agent, the hydroxy carboxylic acid compound and the dispersing agent on the basis of controlling the compatibility of the materials and the synthesis reaction process, and utilizes the excellent fluorine ion adsorption performance and flocculation settling performance of the aluminum-calcium-magnesium-iron-based quaternary metal material to improve the fluorine ion adsorption performance of the aluminum-calcium-magnesium-iron-based quaternary metal material. Quaternary metals are assembled into a long-chain porous structure through chelation, the specific surface area and the pore volume are further increased, the contact area with fluorine ions in mine water is increased, and the porous structure adsorbs complexing groups to achieve the purposes of rapid coordination, strong adsorption, precise chelation, flocculating settling and efficient removal of fluoride in mine water.

The invention belongs to the technical field of inorganic flame retardants, and discloses a nano hexagonal flaky magnesium hydroxide flame retardant and a preparation method thereof. Comprising the following steps: respectively preparing a soluble magnesium salt solution and a precipitant aqueous solution, respectively carrying out preheating treatment, respectively and continuously conveying and mixing to obtain a mixed solution, carrying out ultrasonic treatment and reaction to obtain magnesium hydroxide nano slurry, and carrying out ultrasonic dispersion, filtration and drying to obtain the nano hexagonal flaky magnesium hydroxide. Controllable preparation of the nanoscale hexagonal magnesium hydroxide flame retardant is achieved for the first time, compared with an ultrasonic intermittent method, the nanoscale hexagonal magnesium hydroxide flame retardant has the advantages of being short in reaction period, high in reaction efficiency and uniform in reactant mixing, the preparation period is remarkably shortened to 3 hours, particle size distribution is optimized to be narrow amplitude, PDI is 0.300-0.999, generated magnesium hydroxide particles are in a regular nanometer hexagonal sheet shape, the particle size distribution is optimized to be small, and the particle size distribution is uniform. The dispersity and compatibility of the polymer in a polymer matrix are greatly improved, and excellent cost benefits and market competitiveness are shown in industrial production.

The invention discloses a method for realizing pollution reduction and carbon reduction by phosphogypsum recycling. The method comprises the following steps: (1) washing phosphogypsum with water to remove soluble impurities, neutralizing residual acid, and calcining and activating; (2) pretreatment of the landfill leachate: magnesium salt and phosphate are added, the pH of the landfill leachate is adjusted, and free ammonia NH3 is released through low-temperature heating; (3) the pretreated landfill leachate is sprayed to capture CO2 in the flue gas, and a (NH4) 2CO3 solution is obtained; (4) fully mixing a (NH4) 2CO3 solution with the pretreated ardealite, and controlling the reaction conditions in a closed reactor, so that the ardealite and (NH4) 2CO3 are subjected to a heterogeneous reaction to generate CaCO3 and (NH4) 2SO4; and (5) product purification: carrying out solid-liquid separation on the mixed solution by adopting a multi-stage crystallization process to obtain a building material, and carrying out gradient cooling and recrystallization purification on the filtrate to obtain the nitrogen fertilizer. According to the method, recycling of the landfill leachate and the ardealite is achieved, and CO2 in the flue gas is efficiently removed.

The invention belongs to the technical field of magnesium ion batteries, and particularly relates to a magnesium ion battery electrolyte, a preparation method thereof and a magnesium ion battery. The invention provides a magnesium ion battery electrolyte. The magnesium ion battery electrolyte comprises a magnesium salt electrolyte, an amine organic solvent and an imidazole organic solvent. According to the magnesium ion electrolyte, the imidazole and amine organic solvents are used as the mixed cosolvent of the magnesium ion electrolyte, so that the electrolyte magnesium salt can be effectively dissolved, and the problems of decomposition and passivation of the electrolyte solvent and corrosion of a magnesium metal negative electrode can be effectively solved; the amine and imidazole co-soluble magnesium ion electrolyte provided by the invention can realize reversible deposition and dissolution of a magnesium metal negative electrode under the condition of a wide temperature range of-30 to 80 DEG C, and can be applied to a rechargeable magnesium battery.

The invention relates to the technical field of low-carbon cement-based materials, in particular to a method for preparing a high-carbon-sequestration admixture through acid-magnesium salt synergistic modification of steel slag and application of the high-carbon-sequestration admixture. The method comprises the following steps: (1) adding steel slag powder and a water-soluble magnesium salt into water, then adding an organic weak acid, and carrying out a reaction under a stirring condition to obtain a pretreated steel slag suspension; and (2) introducing carbon dioxide gas into the pretreated steel slag suspension, and carrying out carbonization reaction under a stirring condition to obtain a carbonized steel slag suspension. And carrying out solid-liquid separation on the mixture, and drying the obtained solid product to obtain the high-carbon-sequestration admixture. The method provided by the invention not only can effectively improve the carbon sequestration amount of the steel slag, but also can improve the mechanical properties of the concrete / cement-based material doped with the steel slag.

The present invention relates to a crop nutrition and fortifying composition comprising an effective amount of the following ingredients: elemental sulfur; one or more magnesium salt derivatives or mixtures thereof; one or more potash fertilizers or salts or derivatives or mixtures thereof; one or more iron salts or derivatives or mixtures thereof; one or more zinc salts or derivatives or mixtures thereof; and one or more excipients. The composition comprises particles having a particle size ranging from 0.1 to 50 [mu] m wherein the elemental sulfur content is from 5% to 90% by weight; the content of the element magnesium is 0.1%-40% (weight percentage); the content of the element potassium is 0.1%-40% (weight percentage); the content of the element iron is 0.1%-45% (weight percentage); and the content of the element zinc is 0.1-45% of the total weight of the composition. The invention also relates to a method for preparing the crop nutrition and fortifying composition, and a method for treating a plant, a seed, a crop, plant propagation material, a locus, parts thereof or soil using the crop nutrition and fortifying composition.

Provided are a wide-temperature-range solid-state electrolyte, a preparation method thereof and use thereof in solid-state lithium metal batteries. The preparation method includes: dissolving a lithium salt and a magnesium salt in a solvent to obtain a mixed salt solution; and mixing the mixed salt solution with an ammonia fluoride solution, subjecting a resulting mixture to reaction, and subjecting a resulting reaction product to centrifugation, washing, and drying in sequence to obtain magnesium-doped lithium fluoride nanoparticles; and mixing the magnesium-doped lithium fluoride nanoparticles, a liquid plasticizer, a polymer monomer and a thermal initiator to obtain a liquid precursor, and subjecting the liquid precursor to curing to obtain the wide-temperature-range solid-state electrolyte, where the polymer monomer is a mixture of ethoxylated trimethylolpropane triacrylate and hexafluorobutyl methacrylate.

The present application provides a kind of variable color 3D printing material based on inulin complex, the variable color 3D printing material includes inulin, calcium salt, magnesium salt and zinc salt.The variable color 3D printing material of the present application significantly improves the gelation performance of pure inulin, greatly shortens its gelation time, significantly improves the 3D printing formability, printing precision and water holding capacity of pure inulin gel, has rich variable color and color stability.

The invention discloses a method for increasing the phase transition temperature of Al2O3 aerogel through grain boundary pinning and nano-structure strengthening, which comprises the following steps: co-hydrolyzing an aluminum source, yttrium salt, a silicon source and magnesium salt to form sol through the coordination of double mechanisms of grain boundary pinning and nano-domain isolation, and carrying out gradient heating aging, mixed medium supercritical drying and two-stage sintering to obtain the phase transition temperature of the Al2O3 aerogel. The gamma-alpha phase transition temperature of the Al2O3 aerogel is greater than or equal to 1300 DEG C. The specific surface area of the aerogel after heat treatment at 1300 DEG C is larger than 100 m / g, the process cost is controllable, and the aerogel is suitable for industrial production and can be applied to extreme environments such as a spacecraft thermal protection system and a high-temperature industrial furnace lining.

The invention relates to a crop nutrition and fortification composition comprising: elemental sulphur in a range of 1% to 90% by weight; one or more water insoluble or water soluble iron salts or derivatives or mixtures thereof, wherein elemental iron content is in the range of 0.1% to 50% by weight; one or more water insoluble or water soluble zinc salts or derivatives or mixtures thereof, wherein elemental zinc content is in the range of 0.1% to 55% by weight; one or more water insoluble or water soluble magnesium salts or derivatives or mixtures thereof, wherein elemental Magnesium content is in the range of 0.5% to 50% by weight; one or more water insoluble or water soluble boron salts or derivatives or mixtures thereof, wherein elemental boron content is in the range of 0.01% to 25% by weight; one or more water insoluble or water soluble manganese salts or derivatives or mixtures thereof, wherein elemental manganese content is in the range of 0.1% to 40% by weight; one or more water insoluble or water soluble copper salts or derivatives or mixtures thereof, wherein elemental copper content is in the range of 0.1% to 40% by weight; and, one or more surfactants in the range of 0.1 to 40% by weight. The composition is in the form of water dispersible granules and liquid suspension, wherein the compositions have a particle size of range of 100 nanometers to 5 microns and has an average particle size diameter distribution of less than 1000 nanometers and wherein the total content of the water soluble salts, derivatives or mixtures in the composition does not exceed 80% by the weight of the total composition. The invention also relates to a process of preparing the crop nutrition and fortification composition and to a method of treating the plants, seeds, crops, plant propagation material, locus, or parts thereof or soil with the crop nutrition and fortification composition.

The invention provides an EICP-based sandy soil curing agent, a sandy soil curing method and application thereof, and relates to the technical field of rock and soil reinforcement. The sandy soil curing agent comprises a urease solution, a cementing fluid and a hydrophobic polymer, wherein the urease solution is prepared by salting out a urease crude extract and then carrying out solid-liquid separation; the cementing liquid comprises calcium salt, magnesium salt and urea. The curing agent is convenient to use, the solidified soil body is stable in structure, and the curing agent has excellent disintegration resistance. The invention further provides a sandy soil curing method and application of the sandy soil curing agent or the sandy soil curing method.

A method of manufacturing a nanocomposite is described. The method may include combining a magnesium salt, an aluminum salt, and a metavanadate salt in stoichiometric proportions within 5 mol. % in an aqueous solvent including menthol or dextrose, to obtain a first mixture, heating the first mixture to remove at least 99.5 wt. % of the aqueous solvent to obtain a first solid, grinding the first solid into a first powder, calcining the first powder at a temperature of about 600° C. to 800° C. for a time of about 2 to 4 hours to obtain a second solid, grinding the second solid and urea, to form the nanocomposite, into a second powder, heating the second powder at a temperature of about 550° C. to 650° C. for a time of about 15 to 90 minutes to obtain the nanocomposite, including graphitic C3N4, V2O5, and MgAl2O4.

The invention discloses an oral sleep-aiding composition containing ergothioneine and a preparation method of the oral sleep-aiding composition, and relates to the technical field of sleep-aiding compositions. The oral sleep-aiding composition containing the ergothioneine is prepared from the following components in parts by mass: 0.01 to 3 parts of the ergothioneine, 0.1 to 10 parts of melatonin, 10 to 40 parts of glycine, 2 to 15 parts of magnesium salt, 30 to 70 parts of a diluent, 1 to 10 parts of an adhesive, 0.5 to 5 parts of a lubricant, 2 to 10 parts of a disintegrating agent and 0.1 to 0.5 part of an antioxidant preservative. Through the synergistic compatibility of ergothioneine, melatonin, glycine and magnesium salt, a multi-dimensional action network of oxidation resistance, neuromodulation and receptor inhibition is formed, the limitation of single-component sleep aiding is broken through, and the sleeping efficiency and the sleep maintenance capability are remarkably improved. Based on the scientific proportion of endogenous substances (ergothioneine and glycine), the metabolic burden of traditional sleep-aiding components is avoided, and in combination with the design of a sustained-release preparation, the dose-dependent side effects are reduced, and the safety of long-term taking is improved.

The utility model relates to a device for recovering magnesium salt tablets from industrial magnesium salt-containing wastewater, which is characterized in that magnesium salt in industrial waste acid is recovered by adopting an evaporation mode, after the magnesium salt-containing wastewater is filtered and precipitated, a supernatant solution enters an evaporation system to be evaporated and concentrated, a concentrated solution is recovered, cooling and flaking are carried out, and flaked magnesium salt is collected. The evaporation system comprises an evaporator and a condenser. The evaporation system increases the evaporation speed by enhancing evaporation; through the characteristic of normal-pressure evaporation, the problems that the boiling point is increased due to the fact that the solubility of the solution is increased, and energy consumption is increased due to the fact that the requirement for the quality of a heat source is improved in a traditional boiling evaporation process link and the evaporation system works unstably are solved. Compared with the prior art, the energy utilization efficiency is improved, the energy consumption is reduced, the operation stability of the system is improved, and the risk that the evaporator is scaled and blocked is avoided.

The invention discloses a composition containing magnesium salt and probiotics and application of the composition. The invention belongs to the technical field of dietary nutrition supplements. Wherein the composition further comprises a metagen component and a polysaccharide component, and the composition can be used for relieving flatulence, stomachache, diarrhea, constipation, irritable bowel syndrome, inflammatory bowel disease and other intestinal tracts.

The invention provides magnesium oxide coated aluminum nitride high-thermal-conductivity spherical powder and a preparation method thereof, and belongs to the field of coated aluminum nitride high-thermal-conductivity spherical powder. The preparation method comprises the following steps: preparing modified aluminum nitride powder, preparing magnesium salt nano micro-precipitation sol, performing spray granulation and calcining. The step of preparing the modified aluminum nitride powder comprises the following steps: carrying out ball milling treatment on aluminum nitride, absolute ethyl alcohol, yttrium oxide, lanthanum oxide and a modified aluminum nitride powder additive, and washing and drying to obtain the modified aluminum nitride powder; the modified aluminum nitride powder admixture is a mixture of phosphoric acid, aluminum dihydrogen phosphate, gamma-aminopropyltriethoxysilane and polyoxyethylene stearate; according to the magnesium oxide coated aluminum nitride high-thermal-conductivity spherical powder prepared by the preparation method disclosed by the invention, on the premise of ensuring the thermal conductivity, the hydrolysis resistance is improved, the surface density is enhanced, and the stability is improved.

A particulate mesoporous nanocomposite having the general formula ZrO2·Mg6MnO8, wherein the nanocomposite comprises a monoclinic zirconium dioxide (ZrO2) crystalline phase, a tetragonal ZrO2 crystalline phase, and a cubic magnesium manganese oxide (Mg6MnO8) crystalline phase. The nanocomposite may be obtained by a method comprising: forming an aqueous mixture by adding an aqueous solution of a chelating agent into an aqueous solution of a magnesium salt, a manganese salt and a zirconium salt; adding a polyol in the aqueous mixture to form a gel; heating the gel under stirring at a temperature of about 200° C. to about 400° C. for a sufficient duration to form a dry powder; and, calcining the dry powder at a temperature of about 700° C. to about 1000° C. to form the nanocomposite material.

The invention discloses a magnesium oxide thermochemical heat storage material and a preparation method thereof.The preparation method comprises the following steps that S1, magnesium salt and carbonate are weighed and added into deionized water to be dissolved, and a magnesium salt solution and a carbonate solution are formed; s2, adding the magnesium salt solution into the magnesium carbonate solution, controlling the reaction temperature to be 30-55 DEG C and the reaction time to be 3-5 hours, and filtering after the reaction; s3, drying the sample obtained in the step S2; s4, putting the dried sample into a high-temperature furnace in which the carbon dioxide or air atmosphere is controlled, and calcining to obtain the magnesium oxide thermochemical heat storage material; wherein the microstructure of the magnesium oxide thermochemical heat storage material is a coralline structure composed of nanoparticles. By accurately controlling the reaction process and the calcining atmosphere, the heat storage material with a special nanoscale structure is prepared, and the heat storage capacity of the magnesium oxide heat storage material is improved.

The invention discloses a rechargeable magnesium battery inorganic magnesium salt electrolyte and a preparation method and application thereof, and belongs to the technical field of new energy battery preparation. The inorganic magnesium salt electrolyte of the rechargeable magnesium battery comprises an electrolyte salt inorganic magnesium salt, an organic ether solvent and an electrolyte additive organic phosphorus molecule. The organic phosphorus molecules with high dielectric constant are introduced into the inorganic magnesium salt electrolyte, the solvation structure of magnesium ions in the electrolyte and the dissolvability of the electrolyte are optimized and regulated, a stable magnesium ion solid electrolyte conducting layer is formed on the surface of magnesium metal, the conductivity of the magnesium ions is improved, and the service life of the electrolyte is prolonged. And the side reaction between the magnesium negative electrode and the electrolyte is reduced. Meanwhile, the electrochemical polarization energy barrier of the electrolyte is reduced, and the reversibility and oxidation stability of the rechargeable magnesium battery are improved. The electrolyte can be prepared only by adding the single inorganic magnesium salt and the organophosphorus additive into the ether solvent and stirring, additional additives and dewatering agents are not needed, the preparation method is simple, and large-scale production is easy.

The invention relates to a magnesium salt modified charcoal soil conditioner and a preparation method thereof, and belongs to the technical field of soil improvement. The invention provides a preparation method of a magnesium salt modified charcoal soil conditioner. The preparation method comprises the following steps: (1) preparing a reactant from crop straws and a magnesium chloride solution; (2) preparing a modified reactant from the reactant and a sodium hydroxide solution, and cracking to obtain magnesium salt modified biochar; and (3) mixing magnesium oxide with the magnesium salt modified biochar to obtain the magnesium salt modified biochar soil conditioner. The magnesium salt modified biochar soil conditioner prepared according to the method disclosed by the invention can remarkably improve nitrogen and phosphorus nutrient indexes such as quick-acting phosphorus, ammonia nitrogen and quick-acting nitrogen in soil, can effectively improve acid soil, and also can improve the growth traits and yield of crops.

The invention discloses a flue gas desulfurization composite synergist and a preparation method thereof, and relates to the technical field of flue gas desulfurization. The desulfurization composite synergist is prepared from the following raw materials in parts by weight: 5 to 10 parts of citric acid, 20 to 30 parts of binary acid, 15 to 20 parts of sodium formate, 15 to 20 parts of sodium salt, 12 to 18 parts of magnesium salt, 2 to 4 parts of surfactant, 2 to 4 parts of pH buffering agent and 5 to 10 parts of calcium oxide. The preparation method comprises the following steps: carrying out a ring-opening reaction on 3-(2-aminoethylamine) propyl methyl dimethoxy silane and glucolactone to obtain an intermediate 1, and then carrying out a two-step quaternization reaction to synthesize the novel surfactant. The prepared desulfurization composite synergist has a good desulfurization effect and is suitable for limestone-gypsum wet flue gas desulfurization.

The invention belongs to the technical field of preparation of electrocatalytic oxygen evolution catalysts, and particularly discloses a doping regulation type ruthenium-iridium-based electrocatalytic oxygen evolution catalyst and a preparation method thereof.The preparation method comprises the following steps that S1, ruthenium salt, iridium salt and doped metal salt are dispersed in a solvent, the doped metal salt is selected from one or more of yttrium salt, strontium salt, potassium salt, calcium salt, magnesium salt, scandium salt, gallium salt and aluminum salt; s2, preparing a precursor mixture; s3, performing heat treatment to obtain a solid product; and S4, washing and drying to obtain the metal element doped ruthenium-iridium-based electro-catalytic oxygen evolution catalyst. According to the doping regulation type ruthenium-iridium-based electro-catalysis oxygen evolution catalyst and the preparation method thereof, the process is simple, the universality is high, doping of multiple elements can be achieved only by replacing the doped metal salt, and the obtained catalyst has excellent acidic water electrolysis oxygen evolution activity and long circulation stability; and excessive phase splitting of the Y element and excessive lattice distortion of other elements can be avoided.