253 results about "Magnesium salt" patented technology

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.

The invention discloses a controlled-release potassium-magnesium fertilizer as well as a preparation method and application thereof, and relates to the technical field of controlled-release fertilizer production. Potassium magnesium crude salt recovered through salt lake carnallite flotation crystallization is used as a core raw material, high-roundness modified potassium magnesium salt composite particles are constructed through extrusion master batch forming, roller wet amplification, centrifugal polishing shaping and micropore filling and sealing, and the controlled-release potassium magnesium fertilizer is prepared through coating. The problems that potash fertilizer particles prepared through traditional extrusion granulation have many edges and corners and are not prone to film coating are solved through a multi-stage granulation process, secondary granulation is conducted through heterogeneous fine powder materials, surface micropores are filled, the surface smoothness of the particles is greatly improved, meanwhile, the influence of potassium ions on film forming is isolated, and the potassium fertilizer has the good application prospect. According to the finally prepared controlled-release potassium-magnesium fertilizer, a nutrient release curve is precisely regulated and controlled through the controlled-release film layer, double-nutrient continuous supply of crops with high potassium and high magnesium requirements is achieved, the potassium and magnesium deficiency symptoms of the crops are reduced, the crop quality is improved, and a core technical support is provided for high-value utilization of salt lake potassium ore resources and green quality improvement of the crops.

The present application relates to thin film magnesium battery zirconium magnesium phosphate solid electrolyte target material, preparation method and thin film magnesium battery, belong to magnesium battery technical field. Including: magnesium salt powder is mixed with diaphosphorus pentoxide and zirconium oxide powder to obtain mixed powder; the mixed powder is put into a closed ball mill tank and mixed with zirconium oxide balls, then a dispersing agent is added and mixed and ball milled; then a binder is added to the ball mill tank and ball milled; the synthesized powder after ball milling is sieved through a 500 mesh sieve, the sieved synthesized powder is poured into a vibrating mold, pressed, and a die pressed blank is formed; the blank is put into a cold isostatic pressing machine and pressed and pressure maintained, to obtain a zirconium magnesium phosphate solid electrolyte target material blank after cold isostatic pressing; the zirconium magnesium phosphate solid electrolyte target material blank is put into an atmosphere sintering furnace or a vacuum sintering furnace, after multi-stage heat preservation, the furnace is naturally cooled to room temperature, to obtain a thin film magnesium battery zirconium magnesium phosphate solid electrolyte target material. The composition of the solid electrolyte target material of the present application is uniform, facilitating thin film deposition.

Provided is dental glass having sufficient antibacterial properties through the inclusion of zinc. This dental glass contains 41-52 mass% of ZnO, 47-51 mass% of P2O5, 7 mass% or less of MgO, and 9 mass% or less of CaO. The fluorine content in the dental glass is preferably 3 mass% or less. The dental glass can be easily produced through a mixing step for mixing a starting material solution containing a zinc salt solution, a phosphate solution, an optional magnesium salt solution, and an optional calcium salt solution to form aggregates in the starting material solution, and a drying step for drying the aggregates to obtain a powder.

The invention relates to the field of activated carbon modification, in particular to high-hydrophobicity activated carbon and a preparation method thereof. According to the technical scheme, the method comprises the following steps: grinding a biomass material, adding a solution containing aluminum salt and / or magnesium salt, carrying out hydrothermal reaction to obtain a hydrothermal precursor, drying, carbonizing under the protection of inert gas to obtain a carbonized precursor, activating to obtain an activated precursor, and finally cleaning and drying to obtain the high-hydrophobicity activated carbon. Wherein in the activation step, water vapor is firstly introduced to carry out an activation reaction on the carbonized precursor, then plasma gas is circularly introduced to further react to obtain an activated precursor, and the plasma gas is acetylene and fluorinated benzene mixed plasma gas. The process is simple, complex equipment is not needed, the whole preparation process is short in period, low in cost and easy to industrialize, and the prepared activated carbon is high in hydrophobicity, good in oil absorbency and large in specific surface area.

The invention discloses a chlorine-free environment-friendly bleaching agent for refined cotton. Comprising the following raw materials in parts by weight: 5-18 parts of peracetic acid, 10-30 parts of hydrogen peroxide, 5-8 parts of a sodium alginate / PEG4000 / modified cellulose nanowhisker compound, 1-5 parts of an organic acid catalyst, 0.05-0.5 part of a dipicolinic acid stabilizer, 0.01-0.1 part of a magnesium salt stabilizer, 2-10 parts of a pH buffer solution and 40-60 parts of deionized water. According to the chlorine-free environment-friendly refined cotton bleaching agent disclosed by the invention, efficient bleaching under mild conditions is realized through precise matching of a composite oxidation system and a multi-element synergistic protection system; meanwhile, the invention provides a preparation method and an application process of the bleaching agent, the bleaching agent is adaptive to the existing production line, and enterprise upgrading cost is reduced.

The invention relates to the technical field of biochar composite materials, in particular to a preparation method of a soil heavy metal remediation material and the material and application thereof. The preparation method comprises the following steps: S1, cleaning a biomass raw material, adding a hot alkali solution, filtering, sequentially washing filter residues with an acid solution and water, drying, crushing and sieving to obtain pretreated biomass; s2, soaking the pretreated biomass raw material in a magnesium salt solution, taking out the pretreated biomass raw material and drying the pretreated biomass raw material after the pretreated biomass raw material is fully infiltrated to obtain magnesium-doped biomass; s3, adding the magnesium-doped biomass into a mixed solution containing ammonium salt and phosphate, and adjusting the pH value for crystallization to obtain a composite material precursor; and S4, carrying out anaerobic calcination on the composite material precursor in an inert atmosphere to obtain the composite material. The soil heavy metal remediation material can perform in-situ solidification on multiple heavy metals such as Pb < 2 + > and Cd < 2 + >, is suitable for remediation of acid soil, can realize long-acting solidification, and effectively inhibits reactivation of heavy metal elements.

This invention provides a high-hygroscopic, water-free composite gel-type calcium and magnesium salt tablet and its preparation method, which is made from the following raw materials in parts by weight: 45-70 parts calcium and magnesium salt, 15-25 parts gum arabic, 3-15 parts mica powder, 2-12 parts polyethylene oxide, 0.5-2 parts sodium nitrite, and 2-30 parts gelatin. This tablet exhibits high hygroscopicity and excellent physical properties.

The application belongs to the technical field of wastewater treatment, and particularly relates to a method for separating inorganic salts in a sodium-magnesium sulfate mixed solution. A magnesium salt with relatively large solubility is added to a feed liquid containing sodium-magnesium sulfate, and magnesium sulfate heptahydrate is precipitated at normal temperature and low temperature, respectively, and sodium salt is precipitated at high temperature in the heating and evaporation process, thereby forming a continuous zero-emission disposal sodium-magnesium sulfate separation process. The process has strong universality, is suitable for an aqueous solution system with a mass ratio of magnesium sulfate to sodium sulfate of 1-4, has zero emission in the process, does not pollute the environment, and is an environmentally friendly new technology for separating sodium-magnesium sulfate.

The invention relates to a biosynthesis method of pyridoxal phosphate or pyridoxine phosphate, and belongs to the technical field of biosynthesis. In order to solve the existing problem of serious environmental pollution, the invention provides a biosynthesis method of pyridoxal phosphate or pyridoxine phosphate, which comprises the following steps: in the presence of polyphosphate, magnesium salt, ATP (adenosine triphosphate), pyridoxal kinase and polyphosphate kinase, performing phosphorylation reaction on pyridoxal or pyridoxine and acid salts thereof, thereby obtaining the pyridoxal phosphate or pyridoxine phosphate. The temperature of the phosphorylation reaction is controlled to be 30-38 DEG C, after the reaction is finished, protein separation is conducted on reaction liquid, mother liquor is separated, the compound pyridoxal phosphate or pyridoxine phosphate shown in the formula I is obtained, and the mother liquor is recycled and reused. According to the method, a large amount of ammonium acetophosphate does not need to be additionally added, operation is simpler, mother liquor can be recycled, a large amount of waste water is prevented from being discharged, environment friendliness is better achieved, and the yield is high.

The application provides a supported catalyst for synthesizing single-walled carbon nanotubes, a preparation method and application thereof. The supported catalyst for synthesizing single-walled carbon nanotubes is prepared by the preparation method, which comprises the following steps: pre-treating a carrier precursor to obtain solution A; dissolving a metal active component in water to obtain solution B; mixing solution A and solution B to obtain solution C; adding a metal complexing agent into solution C and heating and stirring to obtain a uniformly mixed solution, and continuously heating and evaporating water to obtain a gel; drying the gel to obtain a porous material, grinding the porous material into powder, and performing first calcination to obtain a catalyst precursor; and performing second calcination after cooling the catalyst precursor. The carrier precursor is a metal salt or a coupling compound of a metal salt; the metal salt comprises a silicon salt, an aluminum salt, a zirconium salt and a magnesium salt; and the metal active component is selected from iron, cobalt, tungsten, molybdenum and nickel. Single-walled carbon nanotubes with better comprehensive performance can be prepared by using the supported catalyst through a chemical vapor deposition method.

This invention belongs to the field of polymer materials technology, and specifically relates to a high glow wire and high limiting oxygen index flame-retardant ABS material, its preparation method, and its application. The flame-retardant ABS material comprises the following raw materials in the indicated mass percentages: 55%–80% ABS resin, 5%–16% brominated flame retardant, 2%–6% synergistic flame retardant, 2%–10% magnesium salt whiskers, 4%–10% water-washed montmorillonite, and processing aids; the synergistic flame retardant includes zinc stannate. The flame-retardant ABS material of this invention exhibits high glow wire and high limiting oxygen index.

The application discloses a kind of nanoscale magnesium hydroxide flame retardant and its preparation method and application, it is related to flame retardant technical field.The application utilizes magnesium salt and sodium hydroxide as raw material, is prepared nanometer magnesium hydroxide by nucleation, crystallization, then it is dispersed in ethanol, sequentially adding phosphate and amino silane is modified and handled to prepare composite modified nanometer magnesium hydroxide slurry, finally adding borate esterified oligomeric siloxane is reacted, and nanoscale magnesium hydroxide flame retardant is prepared.The application is sequentially modified and handled to nanometer magnesium hydroxide by utilizing phosphate, amino silane and borate esterified oligomeric siloxane, constructs composite interface on the surface of nanometer magnesium hydroxide, to reduce the oil absorption value of nanometer magnesium hydroxide flame retardant, enhances its interface bonding force with resin matrix, improves flame retardant performance.

The application provides a MgAl2O4 carrier and a preparation method and application thereof, and relates to the technical field of catalysts. Urea, a soluble aluminum salt, a soluble magnesium salt, polydiallyldimethylammonium chloride and water are mixed to carry out a hydrothermal reaction to obtain a precipitate; the molar ratio of the urea, aluminum elements in the soluble aluminum salt, magnesium elements in the soluble magnesium salt and the polydiallyldimethylammonium chloride is 4.5:2:1:(1-2); the precipitate is sequentially dried and calcined to obtain the MgAl2O4 carrier. The prepared MgAl2O4 carrier is used as a catalyst carrier in a high-temperature and high-pressure dry reforming reaction of methane and carbon dioxide, and excellent stability is exhibited; under high-temperature and high-pressure conditions of 850 DEG C and 2 MPa, the MgAl2O4 carrier is evaluated for 230 hours, and the morphology of the MgAl2O4 carrier before and after the reaction has no obvious difference, the specific surface area changes little, and excellent mechanical strength and chemical stability are shown.

The invention discloses a preparation method of a boron-based magnesium salt and alcohol / phenol magnesium additive composite magnesium salt electrolyte, and relates to the technical field of magnesium ion batteries, and the preparation method comprises the following steps: S1, in an inert atmosphere or an air environment, dissolving / dispersing a magnesium source in an organic solvent, and stirring to obtain a solution a; s2, adding alcohol or phenol into the solution a, and reacting to obtain a solution b; s3, performing post-treatment on the solution b to obtain alcohol magnesium salt or phenol magnesium salt crystals; and S4, co-dissolving alcohol magnesium salt or phenol magnesium salt and fluorine-containing alkoxy magnesium borate in an ether solvent according to a molar ratio of 1: (3-100) to form the composite magnesium salt electrolyte. According to the magnesium battery using the electrolyte, the cycle life can be prolonged by 20%-100%, the actual service cycle of the battery is prolonged, the coulombic efficiency is improved to 97%-99.5%, irreversible capacity loss in the charging and discharging process is reduced, the energy utilization efficiency is improved, the oxidation potential is improved by 0.2-0.5 V compared with that of a traditional electrolyte, the stability and oxidation resistance of the electrolyte are enhanced, and the service life of the magnesium battery is prolonged. And the working voltage window of the battery is widened.

Sea Bittern, the mother liquor left after recovery of sodium chloride, a waste product of salt industry, is a potential source of magnesium compounds. A process has been developed to produce magnesium chloride (MgC12. 6H20). Sea bittern contains magnesium salt in the form of chloride and sulphate, which is desulphated from calcium chloride to convert magnesium sulphate into magnesium chloride and calcium sulphate which is filtered off and filtrate is concentrated to a specific density resulting in crystalline magnesium chloride hexa hydfate (MgC12. 6H20).

This invention relates to the field of catalyst technology, and in particular to a MgO nanocluster catalyst, its preparation method, and its application. The preparation method of the MgO nanocluster catalyst involves adding magnesium salt and long-chain diol to a solvent, and then adding a surfactant dropwise. Under heating conditions, the MgO nanocluster catalyst forms a catalyst. Due to its size-driven surface effect, the MgO nanocluster catalyst possesses a large number of oxygen vacancies and low-coordination sites, forming strongly basic catalytic active centers. The MgO nanocluster catalyst is applied to the preparation of dipropylene glycol ethers. Using propylene oxide and alcohol as raw materials, a two-stage series reactor packed with the MgO nanocluster catalyst is used for the reaction. The use of the MgO nanocluster catalyst effectively improves the conversion rate of propylene oxide and the selectivity of primary ethers. Its nanocluster structure makes it easy to separate from the product by physical methods, overcoming the difficulties of traditional heterogeneous catalysts and product separation, significantly improving production efficiency, and showing good industrial application prospects.

The invention relates to the field of lubricating oil, in particular to an anti-wear ionic liquid additive, a lubricating oil composition and preparation and application of the lubricating oil composition. The lubricating oil composition is prepared from the following components in parts by mass: 2.2 to 3.8 parts of a magnesium salt detergent, 3 to 4.2 parts of an anti-wear ionic liquid additive, 1.8 to 3 parts of an amine antioxidant, 1 to 1.5 parts of a phenol antioxidant, 4.8 to 5.8 parts of a dispersing agent, 0.8 to 1.5 parts of an anti-rust agent, 0.2 to 0.7 part of a pour point depressant, 0.02 to 0.06 part of a composite anti-foaming agent and 78.0 to 85.5 parts of base oil, wherein the anti-wear ionic liquid additive is prepared by mixing N-trioctyl hexadecyl ammonium and 1-sulfonic acid hexyl succinate. The lubricating oil composition provided by the invention can improve the knocking phenomenon existing in the hydrogen engine.

The invention discloses a method for recovering ammonium fluoride from semiconductor photovoltaic wastewater. The method comprises the following steps: adjusting pH in a pretreatment stage, and adding sodium citrate to complex metal ions; a composite extraction agent composed of diisooctyl phosphate, trialkyl phosphine oxide and methyl trioctyl ammonium chloride is adopted for multi-stage counter-current extraction; sequentially carrying out washing and two-stage gradient ammonia water reverse extraction to improve the selectivity and inhibit silicon-boron co-dissolution; the strip liquor is subjected to calcium and magnesium salt impurity removal, reduced pressure evaporation, graded cooling crystallization and vacuum drying, an ammonium fluoride product with the purity larger than or equal to 94% and the water content smaller than or equal to 0.5% is finally obtained, the extracting agent can be recycled, mother liquor and washing liquor are recycled, and the process is closed, environmentally friendly, economical and suitable for industrial application.

The invention discloses a method for recovering valuable elements in liquid obtained after bauxite wet desulphurization, and relates to the technical field of bauxite resource utilization. Comprising the following steps: carrying out ceramic membrane filtration pretreatment on the bauxite wet desulfurization liquid to remove impurities; the silicon element is recycled in a targeted manner through a compound flocculation-calcination process to obtain the white carbon black; the iron element is recycled through ozone oxidation-ammonium bicarbonate precipitation, and high-purity iron oxide is prepared; separating and purifying an aluminum element through a seed crystal induction-calcination process to obtain metallurgical-grade aluminum oxide; a fluorine-containing precipitant is used for selectively precipitating and recovering magnesium element to obtain a high-quality magnesium salt product; and neutralizing the tail liquid, and discharging after reaching the standard. According to the method, accurate separation and high-valued utilization of four elements of aluminum, iron, silicon and magnesium are realized through a synergistic process of targeted recovery of silicon, gradient separation of iron and aluminum and selective precipitation of magnesium, and the problems of silicon resource waste, low element separation efficiency, insufficient product purity, secondary pollution and the like in a traditional process are thoroughly solved; all-component resource comprehensive utilization of desulfurized liquid resources is achieved.

The invention provides a grease hydrodeoxygenation catalyst and a preparation method and application thereof, the preparation method comprises the following steps: mixing an aluminum-containing inorganic porous material, an acidic solution, an extrusion aid, a magnesium salt and a nickel salt, then carrying out extrusion molding to obtain a carrier precursor, and drying and roasting the carrier precursor to obtain a hydrodeoxygenation composite carrier; by taking the total weight of the carrier as 100%, the content of the magnesium element is 0.5-10%, and the content of the nickel element is 0.3-2%; dipping the hydrodeoxygenation composite carrier with a dipping solution containing active metal, and then drying and roasting to obtain the grease hydrodeoxygenation catalyst. When the hydrodeoxygenation composite carrier is prepared, magnesium salt and nickel salt are combined, and the hydrodeoxygenation composite carrier with a nickel-doped magnesium aluminate spinel structure can be obtained. The hydrodeoxygenation composite carrier has good hydrothermal stability and mechanical strength. The grease hydrodeoxygenation catalyst prepared by loading an active metal component on the hydrodeoxygenation composite carrier is stable in deoxygenation activity and excellent in deoxygenation effect.

This invention discloses a method for synthesizing high-value-added ternary hydrotalcite from coal gangue through resource utilization, comprising the following steps: crushing and calcining coal gangue to obtain yellow-brown calcined coal gangue powder, mixing it with acid, continuously acidifying and stirring at 70-80℃ for 0.5-2.5 hours, centrifuging, and obtaining Al-containing... 3+ Fe 3+ With Mg 2+ The process involves preparing a metal salt solution, mixing it with magnesium salt, shaking, and adding alkali solution dropwise until the pH of the solution reaches 11-12. After crystallization at room temperature for 3 hours, the solution is washed and dried to obtain Mg-Al-Fe ternary hydrotalcite. This invention uses coal gangue, a major solid waste, as a substitute for high-purity chemical reagents as the aluminum, iron, and magnesium sources. Only magnesium salt is required, significantly reducing the cost of raw materials for hydrotalcite synthesis. This effectively avoids the bottleneck problem of high production costs and difficulty in large-scale industrial application of traditional hydrotalcite, while simultaneously realizing the high-value utilization of coal gangue resources.

The invention relates to a nickel-based hydrogenation catalyst and a preparation method and application thereof, and relates to the technical field of catalyst preparation. The preparation method of the nickel-based hydrogenation catalyst comprises the following steps: mixing an aluminum salt and a precipitant in water, and carrying out a neutralization gelling reaction to obtain a precipitate slurry; mixing the precipitation slurry, organic acid magnesium salt and organic acid lanthanum salt, and carrying out aging reaction to obtain modified aluminum oxide powder; mixing the modified aluminum oxide powder, a peptizing agent and an extrusion aid, performing extrusion molding, and performing drying and roasting to obtain a catalyst carrier; nickel salt and organic acid cerium salt are mixed in water to prepare impregnation liquid, the catalyst carrier is impregnated with the impregnation liquid, and the nickel-based hydrogenation catalyst is obtained through drying and roasting. The nickel-based hydrogenation catalyst has good stability and carbon deposition resistance, has good catalyst activity and selectivity, can be applied to preparation of 2-propyl heptanol, and effectively improves the hydrogenation reaction conversion rate and the target product selectivity.

The utility model belongs to the field of anti-scale and anti-corrosion pipelines, and particularly relates to a special anti-scale and anti-corrosion pipeline suitable for a high-concentration calcium magnesium salt ion solution, which comprises an anti-scale and anti-scale water treater, a column body of the anti-scale and anti-scale water treater is movably connected with a male connecting ring, the end part of the male connecting ring is clamped with a female connecting ring, and the female connecting ring is connected with the column body of the anti-scale and anti-scale water treater. A connecting column is fixedly connected to the frame body of the male connecting ring, an adjusting piece is fixedly connected to the end of the connecting column, a connecting rod is fixedly connected to the middle of the adjusting piece, and a fixing frame is fixedly connected to the end of the connecting rod. And when the scale prevention and removal type water treater needs to be obliquely mounted, the adjusting piece can be flexibly adjusted to be in an inclined state so as to adapt to the mounting of the scale prevention and removal type water treater.

The application provides a palygorskite-based magnesium silicate anthraquinone regenerative catalyst and a preparation method thereof, the chemical formula of the anthraquinone regenerative catalyst is Mg4Si6O15(OH)2·6H2O, and the preparation method comprises the following steps: (1) obtaining a palygorskite-based SiO2 precursor through hydrothermal acidification of palygorskite; (2) uniformly mixing the palygorskite-based SiO2 precursor, an ammonium salt, a magnesium salt and ammonia water through ultrasonic mixing; and (3) transferring the mixed solution to a hydrothermal kettle to generate palygorskite-based magnesium silicate through hydrothermal reaction. The application takes palygorskite as a silicon source and a template, has the advantages of wide raw material source, simple preparation process, low production cost, green environmental protection and convenience for industrialized production, etc. The palygorskite-based magnesium silicate prepared by the application can be used as a solid alkali catalyst, and has the advantages of non-toxicity, environmental protection, high catalytic activity, long service life and the like.

The invention relates to the technical field of catalysts, and discloses a ZSM-5 type structure-containing all-silicon molecular sieve catalyst and a preparation method thereof, and a cyclohexanone-oxime gas phase Beckmann rearrangement reaction method, the method comprises the following steps: (1) mixing a silicon source, KOH, an organic alkali and water, and hydrolyzing to obtain a colloid mixture; (2) crystallizing the colloid mixture, and optionally concentrating the obtained crystallization mother liquor to obtain molecular sieve slurry; (3) mixing the molecular sieve slurry with a binder, and pulping to obtain molecular sieve-binder slurry; carrying out spray molding on the molecular sieve-binder slurry, and then roasting; and (4) contacting the product obtained by roasting in the step (3) with an alkaline buffer solution containing ammonium salt, ammonia water, magnesium salt and bromine salt, and then drying. The microsphere type all-silicon-1 molecular sieve catalyst prepared by the method has relatively high cyclohexanone-oxime conversion rate and caprolactam selectivity.

The application discloses a kind of organic metal catalyst based on biguanide-based ligand and its preparation method and application, belong to polymer material field.The organic metal catalyst is by the ligand with biguanide-based structure and magnesium salt coordination and form.The preparation method of the application is simple, condition is mild, the obtained organic metal catalyst is with magnesium as metal center, its toxicity is lower, catalytic activity is high, can successfully catalyze cyclic lactone under solvent or solvent-free condition ring-opening polymerization reaction, and product molecular weight is high, distribution is narrow.

The present application relates to resource recycling and wastewater treatment technical field, disclose a kind of method for lithium precipitation mother liquor coproduction lithium phosphate and ammonium magnesium phosphate.Utilize the method, which includes: (1) lithium precipitation mother liquor is separated by nanofiltration membrane, and nanofiltration permeate is obtained;(2) the nanofiltration permeate and phosphorus source are mixed, and the mixture obtained is adjusted to 11.5-13 by lye pH value, carries out first precipitation reaction, and obtains lithium phosphate and phosphorus-containing wastewater;(3) the phosphorus-containing wastewater, magnesium salt and ammonium salt are mixed, and the mixture obtained is adjusted to 9-10.5 by lye pH value, carries out second precipitation reaction, and obtains ammonium magnesium phosphate.The technical scheme realizes the comprehensive resource utilization and harmlessness of lithium precipitation mother liquor, avoids the scaling of lithium carbonate in membrane system, and guarantees the long-term stable operation of membrane system;And create a feasible reaction environment for ammonium magnesium phosphate precipitation method, solve the problem of failure in high carbonate wastewater due to competitive precipitation.

The application discloses an LDH-based vaccine adjuvant and a preparation method and application thereof, and belongs to the technical field of aluminum adjuvant preparation of vaccines, and the preparation method comprises the following steps: mixing at least one of soluble magnesium salt, soluble zinc salt, soluble manganese salt and soluble calcium salt with soluble aluminum salt, and then performing a co-precipitation reaction with a sodium hydroxide aqueous solution in a colloid mill device, and performing crystallization to obtain LDH nanosheets; dispersing the LDH nanosheets in a PBS solution, adding a hepatitis B surface antigen molecule drug, uniformly mixing, and then performing centrifugation to obtain the LDH-based vaccine adjuvant. The LDH-based vaccine adjuvant can significantly promote the maturation of DC cells and the activation of T cells, and the total IgG level reflects the overall humoral immune response intensity of the body to vaccines or pathogens; the LDH-based vaccine adjuvant forms a "storage library" at an injection site to store antigens and slowly release the antigens, and the purpose of long-time continuous stimulation of the immune system in the body is achieved.

The present application relates to the technical field of new energy magnesium ion battery, and particularly relates to a nitrogen-containing boron-based double salt electrolyte, a preparation process and application thereof, components of the nitrogen-containing boron-based double salt electrolyte include a boron-based magnesium salt without chlorine element, Mg(hftab)2 and a small molecule ether, wherein a molar ratio of the boron-based magnesium salt without chlorine element to Mg(hftab)2 is (4-20):1, and the preparation process includes: uniformly mixing the boron-based magnesium salt without chlorine element and Mg(hftab)2 in a molar ratio of (4-20):1, adding the small molecule ether and stirring until completely dissolved. By implementing the present application, magnesium ion deposition is stabilized and an electrode interface film is improved, thereby breaking through the technical bottleneck of a traditional electrolyte magnesium ion concentration and remarkably improving the cycle life of a magnesium battery.