124 results about "Acid radical" patented technology

The invention provides a photosensitive resin composition containing an anthracene methyl quaternary ammonium salt photosensitizer and application of the photosensitive resin composition, a structural main body anthracene ring of the photosensitizer is introduced into methylene substituted by a quaternary ammonium group at a position 10 and / or a position 9, and an acid radical or halogen is adopted as an equilibrium anion; compared with a commercially available anthracene photosensitizer, the photosensitizer has excellent fat solubility and good water solubility through introduction of the quaternary ammonium salt on the premise that the photobleaching property is retained, great potential is brought to formula design of the photosensitive composition, and development waste in a later development process can be greatly reduced; the method can be widely applied to the photo-curing fields of dry films, paints, coatings, printing ink, forming materials and the like.

The invention discloses a solar cell and a preparation method thereof, electric equipment and power generation equipment, the solar cell comprises a passivation material, and the passivation material comprises cations and anions; the cations comprise ammonium ions, and the anions comprise acid radical ions; the ammonium ions comprise substituted or unsubstituted alkyl ammonium ions, and the acid radical ions comprise any one of organic acid radical ions and inorganic acid radical ions. The positive ions in the passivation material can enter perovskite crystal lattices to form two-dimensional perovskite to play a role in protecting a light absorption layer, and the electron cloud density on the negative ions is relatively high and can act with excessive lead iodide in the perovskite to stabilize a lead-iodine octahedral framework, so that the passivation material can passivate the defects of a perovskite layer, and the light absorption performance of the light absorption layer is improved. And the photoelectric conversion efficiency and the stability of the solar cell device are improved.

The invention discloses a method for synthesizing a dichloroacetyl compound, which comprises the following steps: tetrachloroethylene and an acid are subjected to an addition reaction at 100-200 DEG C to obtain an adduct, then the adduct is subjected to an acidolysis, hydrolysis or alcoholysis reaction to obtain the dichloroacetyl compound, the acid for the addition reaction is at least one of sulfuric acid, trifluoromethanesulfonic acid, methanesulfonic acid and phosphoric acid, and the acid for the alcoholysis reaction is at least one of sulfuric acid, trifluoromethanesulfonic acid, methanesulfonic acid and phosphoric acid. The molar ratio of the tetrachloroethylene to the acid is 1: (1-10). By controlling the types of acids and increasing the temperature of the addition reaction, the addition reaction of tetrachloroethylene and acids in the absence of a catalyst is realized. Double bonds of tetrachloroethylene and hydrogen protons are subjected to an addition reaction in a strong acid environment to form a cationic intermediate, then the cationic intermediate is combined with acid radical anions to form an adduct, and the adduct intermediate is high in activity, unstable and free of separation and can be directly subjected to a hydrolysis reaction, an acidolysis reaction or an alcoholysis reaction with another substrate (such as water, acid or alcohol) respectively. The synthesis of dichloroacetyl series compounds is realized, and the route has universality and diversity.

A machine learning (ML)-accelerated first-principles prediction method for a hydration structure of an acid radical anion is provided. The prediction method includes the following steps: S1: constructing and optimizing an anion hydration structure M_mH2O; S2: perturbing the optimized anion hydration structure to generate a training dataset; S3: conducting a ML force field training on the training dataset to establish ML models; S4: conducting a molecular dynamics simulation on the ML models, and identifying atomic structures with a force deviation within a preset range as candidate configurations; S5: merging a validated candidate configuration into a training set for a subsequent iteration to further refine and train the ML model until the model converges, thereby generating an accurate deep potential (DP) model; and S6: conducting a ML-accelerated deep potential molecular dynamics simulation on the DP model to ultimately acquire the hydration structure of the acid radical anion.

The invention discloses a chlorine-nitrogen co-coordinated monatomic zirconium adsorbent and application thereof in selective defluorination of high-salinity wastewater, and belongs to the technical field of fluorine-containing wastewater treatment. The preparation method comprises the following steps: self-assembling melamine and cyanuric acid to obtain supramolecules, ball-milling the supramolecules and zirconium chloride, and pyrolyzing twice to obtain the chlorine-nitrogen co-coordinated monatomic zirconium adsorbent. According to the adsorbent, strong electrostatic repulsion is applied to oxygen-containing acid radicals through electronegative nitrogen ligands, and strong coordination is applied to fluorine ions through electropositive zirconium atoms, so that selective capture of low-concentration fluorine ions in high-salinity wastewater is realized. Compared with a traditional adsorbent, the prepared adsorbent has the advantages of being high in fluorine removal capacity, high in salt tolerance and the like, can overcome the defects that a conventional chemical precipitation method, a coagulation method and a flocculation method are large in agent dosage, high in hazardous waste yield, high in treatment cost and the like, and has a wide application prospect.

The invention relates to the technical field of rare earth wastewater treatment, in particular to a rare earth wastewater treatment method which specifically comprises the following steps: (1) reacting rare earth feed liquid with an oxalic acid precipitator to generate oxalic acid rare earth precipitate and hydrochloric acid, and carrying out solid-liquid separation to obtain diluted hydrochloric acid; (2) treating the diluted hydrochloric acid with an alkaline extractant to remove iron / zinc / copper / nickel impurities in the hydrochloric acid so as to obtain pure diluted hydrochloric acid; and (3) in a corresponding rare earth extraction tank, diluted hydrochloric acid reacts with the loaded organic phase in a reverse extraction section, metal ions enter a water phase after exchange to obtain rare earth feed liquid, and the organic phase is combined with acid radical ions to realize regeneration.

A method and device for online continuous production of a high-purity oxide powder. The method comprises: spraying a waste acid solution into a production furnace (1), and roasting same to generate an oxide powder; transferring flue gas generated in the production furnace (1) to a flue gas treatment unit, and conveying a primary oxide powder generated by the production furnace (1) to a secondary reactor to be heated and purified again, so as to obtain hot gas and a secondary oxide powder; and performing gas-solid separation on the hot gas generated in the secondary reactor, and recovering a gas phase obtained by the gas-solid separation into the production furnace (1) to recover acid radical ions. The primary oxide powder generated by the roasting in the production furnace (1) is heated and purified again by means of the secondary reactor, and therefore residual acid radical ions and moisture in the powder are further released, and the quality and performance of the oxide powder is improved, thereby obtaining an oxide powder that is free from moisture and acid radical ions; moreover, a stable and airtight internal production environment required for the production furnace (1) can be well maintained.

The invention relates to the technical field of oral biological materials, in particular to a self-adaptive anti-caries coating as well as a preparation method and application thereof. The coating is prepared from random and block polymers, and is specifically prepared by polymerizing acid radical-containing functional monomers, phenylboronic acid and derivatives thereof. Construction of the coating depends on specific coordination of a functional group and Ca < 2 + > in enamel, and stable anchoring on the tooth surface is achieved. The core action mechanism is to introduce phenylboronic acid groups to endow the coating with pH sensitive characteristics: in a cariogenic acid environment, biofilm formation is synergistically inhibited through a plurality of mechanisms such as physical barrier, electrostatic repulsion and inhibition of mucoprotein-mediated adhesion. According to the application, the Ca < 2 + > anchoring monomer, phenylboronic acid and the derivative thereof are copolymerized, design is carried out aiming at two key links of protein adsorption and bacterial adhesion, multi-mechanism synergy and environment dynamic response are integrated, and an integrated anti-caries effect from early intervention to long-term protection is realized.

The invention provides a photosensitive resin composition containing an acridine methylene quaternary ammonium salt photosensitizer and application of the photosensitive resin composition, quaternary ammonium group substituted methylene is introduced to the ninth position of a structural main body acridine ring of the photosensitizer, and acid radical or halogen is adopted as equilibrium anion. According to the photosensitizer, a quaternary ammonium salt group is introduced to the 9 site of an acridine ring, so that the problems that a traditional 9-phenylacridine photosensitizer is poor in compatibility, prone to crystallization and precipitation, insufficient in water solubility, weak in antistatic performance and the like in a formula are effectively solved. The photosensitive resin composition disclosed by the invention shows excellent dispersion stability, high sensitivity and high resolution, and can be used for remarkably reducing precipitates in a developing process and reducing poor lamination caused by static accumulation. The photosensitive dry film prepared based on the composition is suitable for fine pattern manufacturing in the fields of dry films, paints, coatings, printing ink, forming materials and the like, and has high yield and production efficiency.

This invention relates to a highly efficient scale inhibitor and its preparation method, belonging to the field of water treatment agent technology. The invention synthesizes a branched dehydroabimethamine compound with a branched structure, and utilizes the Michael addition reaction between the secondary amine group and the double bond of the branched dehydroabimethamine compound to graft sulfonic acid and phosphonic acid groups onto the compound, obtaining a scale inhibitor with a dehydroabimethamine structure, a branched structure, sulfonic acid groups, and phosphonic acid groups. The sulfonic acid and phosphonic acid groups in the scale inhibitor have a strong chelating effect with metal ions such as calcium, iron, and magnesium, thereby disrupting scale growth. The sterically hindered dehydroabimethamine structure and branched structure in the scale inhibitor, after adsorbing onto the surface of scale-forming microcrystals in water, form physical spatial barriers between scale particles, thus preventing the microcrystals from approaching and aggregating, thereby preventing them from forming large scale deposits.

The invention belongs to the technical field of perovskite nanocrystals, and particularly relates to a composite material and a preparation method thereof, a photoelectric device and a display device, and the composite material comprises perovskite nanocrystals and acid radical anions of VIB group elements modified on the surfaces of the perovskite nanocrystals. The invention further relates to a preparation method of the composite material, a photoelectric device and a display device. According to the technical scheme provided by the invention, the stability of the perovskite nanocrystal in different environments can be improved.

The embodiment of the present application provides an electrolyte, a secondary battery and an electric device, wherein the electrolyte provided by the embodiment of the present application comprises a sodium salt, an organic solvent and an additive, the additive at least simultaneously comprises a B-O bond, a C=C bond and a C=O bond, wherein B in the B-O bond is in an electron-deficient state, so that the additive is acidic, can complex with an acid radical ion of the sodium salt, thereby improving the dissociation degree of the sodium salt and the migration number of sodium ions, and reducing the bulk phase and electrode interface impedance; and the C=C bond and the C=O bond in the additive can effectively reduce the deposition of transition metals such as Mn of the negative electrode, reduce the impedance, can form a highly stable electrode-electrolyte interface structure, can stabilize the positive and negative electrode interface film, and improve the high-temperature storage and cycle performance of the battery, thereby solving the problems that the electrode / electrolyte interface of the existing sodium ion battery is unstable, and is easy to cause the battery to deform and the performance to decay.

The invention discloses a preparation method of an oxyacid radical modified graphite-based cathode for electro-catalysis hydrogen peroxide synthesis. An oxyacid (sulfuric acid or phosphoric acid) and nitric acid are compounded to form a mixed acid solution, and the graphite-based electrode is subjected to oxyacid radical modification by using the mixed acid solution. The preparation method of the oxygen-containing acid modified graphite-based electrode is simple and low in cost, does not need harsh conditions such as high temperature and the like, and has great industrial and large-scale production potential; the oxygen-containing acid radical modified graphite-based cathode prepared by an acid treatment method is used for reducing oxygen to produce hydrogen peroxide, the yield of the hydrogen peroxide exceeds 21.79 mg.cm <-2 >. H <-1 > and is increased by about 20 times compared with the yield (1.13 mg.cm <-2 >. H <-1 >) of oxygen oxidation by using unmodified original commercial carbon paper, and meanwhile, the highest selectivity of the hydrogen peroxide is up to 97.5%.

A positive photosensitive resin composition for a low-temperature process includes an alkali-soluble phenolic resin, a compound with quinonediazide group, a mixed solvent and at least one additive. The mixed solvent includes a first solvent and a second solvent. The first solvent has a volatilization rate of more than 50 relative to a volatilization rate of butyl acetate of 100, and the second solvent has a boiling point between 150° C. and 200° C. The at least one additive has a molecular weight of 500-5000 and a structural unit as Formula (I), wherein R1 is selected from a group consisting of hydrogen, hydroxyl group, C1-C5 alkyl group, phenyl group, halogen atoms and cyano group, R2 is selected from a group consisting of hydrogen, acid radical, benzene and derivatives thereof, phenols, benzoic acid and derivatives thereof and aromatic heterocycles, and n is 10-80. It is also provided a method for preparing a photoresist film

The application provides a photosensitive resin composition containing an anthracene methyl quaternary ammonium salt photosensitizer and application thereof, the photosensitizer has a quaternary ammonium group substituted methylene introduced at 10 and / or 9 positions of the anthracene ring, and an acid radical or halogen is used as a counter anion; compared with a commercially available anthracene photosensitizer, the photosensitizer has excellent fat solubility and good water solubility by introducing the quaternary ammonium salt on the premise of retaining photobleaching, brings great potential for formula design of the photosensitive composition, and can greatly reduce developing waste in a later developing process; and can be widely applied in the fields of dry films, paints, coatings, inks and molding materials and the like.

The invention discloses a light flame-retardant nano cellulose film as well as a preparation method and application thereof, and belongs to the technical field of lithium ion batteries. The method comprises the following steps: mixing nanocellulose with a flame-retardant element source containing acid radicals, and carrying out hydrogen bond bonding and electrostatic interaction to obtain nanocellulose dispersion liquid rich in flame-retardant acid radicals; an oxidizing agent and a polymer monomer are added into the nanocellulose dispersion liquid rich in flame-retardant acid radicals for a polymerization reaction, and the nanocellulose film is obtained through suction filtration and film forming. The flame-retardant elements in the film are uniformly dispersed in the three-dimensional network structure in a chemical bonding manner, so that the thermal stability and the body flame retardance of the cellulose material can be improved, and the ionic conduction capability of the film can be improved by utilizing the porous structure of the nano cellulose material; when the material is applied to a lithium ion battery as a diaphragm material, the capacity and the rate capability of the battery can be improved, and the safety and the cycling stability of the battery can be remarkably improved.

The invention discloses an iron-silicon magnetic powder core and a preparation method thereof, and belongs to the technical field of soft magnetic materials and powder metallurgy. The preparation method comprises the following steps: fully mixing a phosphoric acid metal ion solution containing phosphoric acid and metal acid phosphate with iron-silicon alloy powder; the mass ratio of the phosphoric acid solution to the metal acid phosphate to the iron-silicon alloy powder is (0.25-1.5): (0.5-3): 100, and the mass ratio of the phosphoric acid solution to the metal acid phosphate to the iron-silicon alloy powder is (0.25-1.5): (0.5-3): 100; and the coated iron-silicon alloy powder is pressed, and the iron-silicon magnetic powder core is prepared. According to the scheme, the iron-silicon alloy powder is added into the weak acid mixed solution of the phosphoric acid and the metal acid phosphate, so that the dosage of the phosphoric acid in the passivation process is reduced, the passivation speed of the iron-silicon alloy powder is slowed down, and a more uniform insulating coating layer can be formed; meanwhile, by adding metal acid phosphate, acid radical ions are provided in the passivation process, and corresponding orthophosphoric acid metal is generated on the outer surface of the iron-silicon alloy powder.

The invention provides a sulfonate photoacid generator and a preparation method and application thereof.The sulfonate photoacid generator has the structure shown in the general formula (I), the photoacid generator does not contain fluorine, the acidity of sulfonic acid generated through photolysis of the photoacid generator is not weaker than that of traditional fluorine-containing photoacid, and the problems that according to an existing sulfonate photoacid generator, acid radicals contain fluorine, and the acid radicals are not prone to being damaged are solved. The sulfonate photoacid generator does not contain the problem of weak acidity of fluorine acid radicals, and can improve the photosensitivity and resolution of the photosensitive composition.

This invention relates to a titanium cyanide quaternary ammonium salt compound, its preparation method, and its application. The titanium cyanide quaternary ammonium salt compound is the compound shown in the formula. The method for preparing the compound shown in the formula includes (1) preparing pyridine phthalocyanine from o-pyridine dinitrile as a starting material, and (2) quaternizing the pyridine phthalocyanine with the corresponding halogenated product to obtain the target compound. Adding the compound shown in the formula during the pigmentation process of zinc halide phthalocyanine crude pigment can not only improve the brightness and contrast of the zinc halide phthalocyanine pigment, but also enhance its dispersibility and storage stability. In the formula, R1~R4 are independently selected from C1~C4. 10 Alkyl groups, fluorine-containing C1~C 10 Alkyl groups, or C1-C groups substituted with 5-6 aryl groups. 10 One of the alkyl groups; X is an acid radical anion with balanced charge.

The invention belongs to the field of catalytic materials, and discloses a preparation method of an alkaline nitrate catalytic material (Fe-NiNH / NF) and application of the alkaline nitrate catalytic material in electrocatalytic oxygen evolution reaction in seawater. The basic nitrate catalyst is innovatively prepared by designing basic nitrate and optimizing a hydrothermal method preparation process, and the catalyst forms a regular nanosheet or nanolayer structure and can uniformly cover a three-dimensional porous substrate of foamed nickel. The sheet structure not only significantly increases the surface area, but also provides more active sites for the reaction, thereby greatly improving the OER catalytic efficiency. Meanwhile, NO3-acid radicals are introduced, and the acid radical ions can effectively regulate and control electron distribution in the structure and have a stabilizing effect on real active species in the catalysis process. In addition, the preparation process provided by the invention realizes relative simplification on the core steps of pretreatment of the foamed nickel, multi-metal basic salt loading by a hydrothermal method, metal synergistic doping hydrothermal reaction and the like, and is suitable for industrial application.

The invention discloses an aluminum-based porous adsorption material for capturing CO2 and a preparation method of the aluminum-based porous adsorption material. The material is prepared by taking an industrial-grade aluminum source and formate as core components and an acid radical assistant as auxiliary materials through step-by-step coordination assembly of premixing the aluminum source and the formate and then adding the assistant, and other metal elements are not introduced. According to the invention, the generation of large grains is inhibited through coordination competition of an acid radical auxiliary agent, a hydrogen confinement pore cavity (3.8) is constructed, the engineering CO2 dynamic adsorption capacity is up to 48.8 cm / g, the CO2 / N2 dynamic selectivity is up to 12.8, the single-tower carbon capture energy consumption is low, the material performance is superior to that of commercially available silica gel and similar commercial MOF materials, and the bottlenecks of poor mass transfer, high cost and slow rate of the traditional material are effectively broken through. The adsorbent is adaptive to CO2 / N2 and CO2 / low-carbon hydrocarbon mixed systems, can be applied to industrial scenes such as flue gas decarburization and natural gas upgrading, and has the advantages of cheap raw materials, simple process and remarkable application potential.

The application discloses an iron electrode coupled anaerobic granular sludge membrane bioreactor, which comprises a reactor body, a granular sludge bed and a clarified liquid are sequentially arranged in the reactor body from bottom to top, an iron negative electrode and a metal mesh positive electrode are oppositely arranged in the clarified liquid, and a water outlet pipe is communicated with the side wall of the reactor body corresponding to the clarified liquid. 2+ , Fe 2+ has a strong flocculation effect, reduces the content of suspended sludge in the clarified liquid, the released divalent iron can connect various anions such as hydroxyl, acid radical, sulfate radical and phosphate radical ion to form large flocculation sludge, reduces soluble protein and polysaccharide and is converted into solidified extracellular polymer, reduces pore size blockage and reduces the formation of high-strength attached sludge cake layer, and therefore irreversible membrane pollution is reduced.

The invention provides a method for inhibiting poisoning of an anode catalyst for PEM electrolyzed water, a modified oxygen evolution catalyst and application, and relates to the technical field of proton exchange membrane electrolyzed water. The method comprises the following steps: mixing and stirring an oxygen evolution catalyst and an auxiliary modifier in a solvent to obtain a mixed solution I; wherein the auxiliary modifier comprises hydrogen peroxide; mixing the mixed solution I with a modifier, and performing reflux heating to obtain a mixed solution II; wherein the modifier comprises any one or a combination of at least two of a reagent containing acid radical ions, thiourea, phosphide or phosphide; and removing the solvent in the mixed solution II to obtain the modified oxygen evolution catalyst. After the surface of the oxygen evolution catalyst is modified, the strong coordination effect of ionomer sulfonic acid sites is inhibited, a dynamic adjustable hydrogen bond network is constructed, efficient gas transmission is promoted, and finally high-working-condition active expression and long-life stable operation of the catalyst are achieved.

The application discloses a device and a control method for delaying capacity attenuation of a full-vanadium redox flow battery, and relates to the technical field of flow batteries. The device and the control method can directly mix the positive and negative electrode side reaction gases of the flow battery to perform a chemical reaction, and the reaction products can be distributed back to the electrolyte storage tank according to the amount of the reactant gas, thereby solving the consumption of the byproduct gas, avoiding the loss of the electrolyte acid radical ions, slowing down the rate of electrolyte valence imbalance, and slowing down the capacity attenuation rate of the battery system.

The present invention belongs to the technical field of solid resource utilization, and relates to a method for recovering iron and aluminum from red mud by acid leaching and recovering acid, which comprises the following steps: (1) strongly acid leaching red mud to obtain red mud residue and an iron-aluminum solution; (2) mixing the red mud residue with demineralized water to obtain acid radical-removed red mud residue and a sodium salt solution; (3) stirring, heating and evaporating the iron-aluminum solution to obtain an iron-aluminum mixed solid and a recovered strong acid solution; (4) adjusting the pH of the iron-aluminum mixed solid to obtain an iron-aluminum hydroxide solid and a sodium salt solution; (5) mixing the iron-aluminum mixed solid with demineralized water to obtain acid radical-removed iron-aluminum mixed solid and a sodium salt solution; (6) adjusting the pH of the acid radical-removed iron-aluminum mixed solid to obtain an iron hydroxide solid and a sodium aluminate solution. The present invention realizes the recovery of iron and aluminum in red mud under the conditions of low acid consumption and low alkali consumption; on the basis of recovering iron and aluminum, strong acid is recovered with less energy consumption; the obtained red mud residue, iron hydroxide and sodium aluminate solution contain less impurities, which is convenient for subsequent processes.

The present application discloses a solar cell and a preparation method therefor, an electric device, and a power generation device. The solar cell comprises a passivation material, and the passivation material comprises cations and anions; the cations comprise ammonium ions, and the anions comprise acid radical ions; and the ammonium ions comprise substituted or unsubstituted hydrocarbyl ammonium ions, and the acid radical ions comprise any one of organic acid radical ions and inorganic acid radical ions. The cations in the passivation material can enter a perovskite lattice to form two-dimensional perovskite, so that the effect of protecting a light absorption layer is achieved; the electron clouds on the anions have high density, and can act with excessive lead iodide in perovskite, so that the lead iodide octahedral framework can be stabilized; and in this way, the passivation material can passivate the defects of a perovskite layer, thereby improving the photoelectric conversion efficiency and stability of the solar cell device.

The invention relates to the technical field of battery electrolytes, and discloses a negative electrode electrolyte, a vanadium-zinc flow battery and a preparation method of the vanadium-zinc flow battery, and the negative electrode electrolyte comprises a vanadium source, a zinc source, co-deposition metal ions, acid radical ions, hydrogen ions and an aqueous solution containing an additive; the codeposition metal ions comprise at least one of In < 3 + >, Sn < 2 + >, Al < 3 + > and Bi < 3 + >; and the concentration of the codeposition metal ions in the negative electrode electrolyte is 0.01-0.5 mol / L. According to the invention, co-deposition metal ions (such as Sn < 2 + > and In < 3 + >) in a specific concentration range are introduced, so that the co-deposition metal ions and zinc are subjected to alloying co-deposition during charging, zinc ions are actively guided from thermodynamic and dynamic levels to form a compact and flat deposition layer instead of randomly grown dendritic crystals, and the performance of the material is improved. The problem of rapid capacity attenuation of the vanadium-zinc flow battery in long-term circulation is effectively solved, and the stability and capacity retention rate of long-term operation of the battery are guaranteed.

The invention discloses an HY catching agent as well as a preparation method and application thereof, and belongs to the technical field of acid waste liquid regeneration. The HY trapping agent comprises the following components in percentage by mass: 0.08%-2.00% of a pH buffer agent, 5.0%-12.0% of an adsorbent, 0.01%-0.08% of an ionic strength regulator, 0.03%-0.10% of an acid radical supplement, 0.01%-0.03% of a chelating agent, 0.05%-0.2% of sulfamate and a proper amount of deionized water. The heavy metal removal rate is larger than or equal to 99%, the acid radical retention rate is larger than or equal to 95%, and the treatment cost is reduced.

The present application relates to the field of vanadium battery, and discloses a method for directly preparing vanadium battery electrolyte from vanadium solution without organic participation, comprising: adjusting the pH of the vanadium solution to 2-3, and adding inorganic reducing agent to convert V(V) in the vanadium solution into V(IV), to obtain pretreated vanadium solution; separating Fe impurities and Al impurities in the pretreated vanadium solution in the form of precipitation, and adsorbing Ti impurities in the pretreated vanadium solution by adsorbent, to obtain impurity-removed vanadium solution containing V(IV); performing electrodialysis treatment on the impurity-removed vanadium solution to concentrate the solution and remove alkali metal impurities in the solution, to obtain post-electrodialysis solution; performing electrolysis and blending on the post-electrodialysis solution, to obtain electrolyte with predetermined acid radical concentration and predetermined vanadium concentration, and V(III) / V(IV)=1:(0.95-1.05). The present application can shorten the process flow and avoid environmental pollution caused by the use of organic matter on the basis of ensuring the performance of the electrolyte.

The invention discloses a phosphorus-modified cerium dioxide catalyst and a preparation method and application thereof.The phosphorus-modified cerium dioxide catalyst comprises cerium dioxide and cerium-phosphorus composite oxide, the cerium-phosphorus composite oxide is composed of cerium ions and acid radical ions, the acid radical ions are PnO3n + 1n + 2-, and n is a positive integer; and a Ce < delta + >-O-P heterogeneous interface formed by connecting a Ce-O bond of the cerium dioxide and a P-O bond of the cerium-phosphorus composite oxide is formed between the cerium dioxide and the cerium-phosphorus composite oxide. The preparation method adopts a precipitation-induction method. According to the present invention, the phosphorus-modified cerium dioxide catalyst with the high catalytic activity can be provided, the methanol conversion rate and the dimethyl carbonate yield can be effectively improved, and under the conditions of 2.4 MPa, 140 DEG C and 2880 h <-1 >, the methanol conversion rate of the phosphorus-modified cerium dioxide catalyst is 41.2%, and the dimethyl carbonate selectivity is 99.8%.