50 results about "Cyanide ion" patented technology

The invention provides a gold leaching agent for treating high-carbon gold-bearing minerals and a gold leaching process, and belongs to the technical field of hydrometallurgy. According to the gold leaching agent, guanidinium thiocyanate is used as an agent main body, a hydroximic acid compound is used as a complexing synergist, and soluble inorganic salt of ferric iron is used as a competitive adsorbent. In a leaching system, guanidine thiocyanate can be decomposed to generate guanidine, sodium sulfide, sodium thiocyanate and water. Thiourea anions are converted into cyanamide under the alkaline condition, then cyanamide is slowly released and decomposed into cyanide ions, the cyanide ions are complexed with gold ions, and gold leaching is achieved. Namely, guanidinium thiocyanate has the effect of releasing the cyanide ions step by step, and slow release of the cyanide ions is realized. The gold leaching agent system does not contain cyanide (sodium cyanide, potassium cyanide and the like) and is a clean and environment-friendly agent system, and efficient leaching of gold in high-carbon gold-bearing minerals can be achieved through the synergistic effect of all functional agent components.

The invention provides a low-cyanide gold leaching agent system and a dump leaching process thereof, and belongs to the technical field of hydrometallurgy. According to the method, a synergistic process of'interface activation, cyanide etching and iron precipitation inhibition 'is constructed by designing a low-cyanide gold leaching agent system. The amino acid auxiliary leaching agent adsorbs the gold surface to weaken lattice energy, so that the etching efficiency of trace cyanide ions is improved; mercapto-containing malic acid is used as a chelating agent, specific mercapto in molecules of the mercapto-containing malic acid and iron ions form an ultrahigh-stability water-soluble complex, generation of ferric hydroxide precipitates is thoroughly blocked, ferrous ions stabilized by the chelating agent are subjected to in-situ oxidation through dissolved oxygen and efficiently regenerated into potassium ferricyanide, and accumulation of free cyanogens in a solution system is eliminated; meanwhile, a chelating agent-iron complex forms a self-buffering pair, the pH of the dump leaching solution is accurately controlled, and secondary precipitation caused by local alkalization is prevented. According to the process, under the synergistic effect that the core chelating agent guarantees permeation stability and the leaching aid accelerates gold dissolution, the heap leaching period is compressed to 45 days.

The invention discloses a method for preparing a Prussian blue compound through a lateral growth mechanism, and belongs to the technical field of material preparation. On the premise of not changing the overall frame structure of the existing Prussian blue, the low-potential Prussian blue compound FeR [Fe (CN) 6] with different nickel substitution amounts is obtained by adjusting the types and contents of transition metal elements and substituting atoms bridged with cyanide ions. According to the present invention, by using the anisotropy of the compound, the formation of the cubic phase crystal structure through the lateral growth mechanism is clarified from the atomic level, the preparation of the Prussian blue compound can be completed within a short time through the thermodynamic and dynamic condition setting, and the method has characteristics of no toxicity, no harm, no excess impurity generation, and increase of the synthesis yield;

The invention discloses a treatment method of fruit and vegetable beverage production wastewater, and belongs to the field of water treatment.The treatment method comprises the steps that S0, cyanide-containing ions in raw water are oxidized to remove the cyanide-containing ions in the raw water, and cyanide-free water is formed; the method comprises the following steps: S1, extruding cyanide-free water by a screw extruder, and carrying out solid-liquid separation to form by-product pomace and filtrate; s2, the filtrate enters an alkali neutralization container to be neutralized until the pH is 6.5-7.5; s4, treating the neutralized solution in an EGSB (expanded granular sludge bed) reactor to form first treated water; s5, the first treated water enters an MEC device to be treated, and then second treated water is formed; s6, the second treated water enters an acidification container to be acidified until the pH value is 2.5-3.5, and acidizing fluid is formed; s7, performing electro-Fenton reaction treatment on the acidizing fluid to form Fenton water; and S8, Fenton water precipitation solid-liquid separation, wherein the clear liquid is discharged as up-to-standard discharge water. The method is specially suitable for treating wastewater generated in the apple juice production process of an apple juice production enterprise.

The invention relates to the technical field of wastewater treatment, in particular to a nereistoxin pesticide wastewater treatment process which comprises the following steps: sequentially feeding nereistoxin agricultural wastewater into a filter tank, a pH regulating tank, a Fenton oxidation tank, a flocculation tank, an electrocatalytic oxidation tank, a pre-anoxic tank, a CASS tank and a disinfection tank for treatment. Wherein the concentration of hydrogen peroxide is dynamically controlled in the Fenton oxidation pond. The invention aims to avoid the problem that cyanide ions in the nereistoxin pesticide wastewater are not reacted thoroughly and a large amount of harmful gas ammonia is released, improve the capability of removing nereistoxin in agricultural wastewater treatment, and improve the biodegradability of the nereistoxin pesticide wastewater at the same time.

This application relates to a flow battery system and a recovery method thereof. The method is used to control the flow battery system to perform N recovery cycles. When the electrolyte needs to be recovered for the i-th cycle, the method includes: closing the valves between the working battery stack and the positive and negative electrolyte storage tanks; starting the recovery battery stack charging and opening the valves between the positive electrolyte storage tank, the positive storage tank, and the recovery battery stack, allowing the positive electrolyte to circulate in the positive electrolyte storage tank and the negative electrode of the recovery battery stack, and the negative electrolyte to circulate in the negative electrolyte storage tank and the positive electrode of the recovery battery stack; wherein, hydroxide ions in the negative electrolyte are converted into oxygen and water on the positive electrode side of the recovery battery stack, and cations are transported across the membrane to the negative electrode side of the recovery battery stack in the form of hydrated ions, converting ferricyanide ions in the positive electrolyte into ferrous cyanide ions; hydroxide ions and ferricyanide ions are accumulated products during the operation of the working battery stack.

The present invention discloses a method for treating wastewater produced in the production of fruit and vegetable beverages, belonging to the field of water treatment, including: S0, removing cyanide ions in the raw water by oxidizing the cyanide ions in the raw water to form cyanide-free water; S1, the cyanide-free water is extruded by a screw extruder, and after solid-liquid separation, a by-product fruit residue and a filtrate are formed; S2, the filtrate enters an alkali neutralization container and is neutralized to a pH of 6.5 to 7.5; S4, the neutralized liquid enters an EGSB reactor for treatment to form a first treated water; S5, the first treated water enters an MEC device for treatment to form a second treated water; S6, the second treated water enters an acidification container and is acidified to a pH of 2.5 to 3.5 to form an acidified liquid; S7, the acidified liquid enters an electro-Fenton reaction for treatment to form Fenton water; S8, the Fenton water is precipitated for solid-liquid separation, and the clear liquid is discharged as up-to-standard discharged water. The present invention is specifically applicable to the treatment of wastewater generated in the production process of apple juice by apple juice production enterprises.

A method of making a poly (ether-carbonate) polyol comprises a polymerization stage comprising polymerizing carbon dioxide and at least one alkylene oxide with a starter in the presence of a double metal cyanide polymerization catalyst and a catalyst promoter free of halogen anions and cyanide ions. The catalyst promoter is separated from the double metal cyanide polymerization catalyst.

The invention relates to the technical field of flow batteries, in particular to a Fe-free Prussian blue analogue, a preparation method thereof and a solid energy storage material. The chemical composition of the Fe-free prussian blue analogue is Va [M (CN) b] c, wherein V exists in a form of one or a mixture of more than two of V < 2 + >, V < 3 + >, VO < 2 + > or VO < 2 + >; wherein M is one or two of Co and Ni, when M is a mixture of Co and Ni, the molar ratio of Co to Ni is (3: 1)-(1: 3), and the molar ratio of M to V is (1: 2)-(1: 5); trivalent cobalt is partially reduced, the molar weight ratio of trivalent nickel to divalent nickel is less than or equal to 0.3: 1, and V, M and cyanide ions form a three-dimensional network crystal through coordinate bonds. The Fe-free Prussian blue analogue is prepared from hexacyanocobaltate and / or tetracyanonickelate through a direct coordination method with a vanadium ion salt solution after valence regulation, and the technical problems that an existing solid energy storage material is poor in reversibility, low in voltage efficiency and the like can be solved.

The invention discloses a sample treating fluid, a vitamin B12 detection sample pretreatment method, a detection kit, a detection method and application thereof, and particularly discloses the sample treating fluid which comprises strong base and sodium dodecyl sarcosinate. According to the sample treatment liquid, VB12 can be completely dissociated, and a relatively stable state can be kept. The invention further provides a detection sample pretreatment method of the vitamin B12. The detection sample pretreatment method comprises the step of mixing the sample treatment liquid with a to-be-detected sample for reaction. According to the sample treatment liquid provided by the invention, VB12 can still be dissociated from binding protein under the condition that highly toxic cyanide or a complex containing cyanide ions and unstable in dissociation is not adopted, and the VB12 can be kept in a relatively stable state to participate in subsequent reaction.

This invention proposes a method for improving the quality of pyrite concentrate powder recovered from cyanide tailings, belonging to the field of slag resource utilization technology. The method includes: mixing raw cyanide tailings ore with water to form a cyanide tailings slurry; filtering the slurry through a fixed mesh screen to remove sand and gravel impurities; and conveying the slurry to an activation tank; adding concentrated sulfuric acid to the activation tank to convert cyanide ions into hydrogen cyanide gas, followed by the addition of alkali solution, a collector, and pine oil to obtain a slurry; agitating and aerating the slurry, causing FeS2-containing slurry particles to float to the surface and be scraped off; continuing agitation and aeration to enrich and purify the FeS2-containing slurry particles; further enrichment and purification followed by scraping off the FeS2 slurry particles to recover the FeS2 slurry particles, yielding concentrate and tailings slurries respectively; the concentrate and tailings slurries undergo solid-liquid separation under the action of a slurry pump, followed by pressure filtration; the filtrate is collected and discharged into a workshop circulating water tank for reuse; after unloading, the concentrate and tailings are collected separately. This invention produces high-quality pyrite concentrate powder with an FeS2 content of approximately 90%.

The invention relates to the technical field of nano catalysts, in particular to a preparation method of an electrostatic confinement diatomic flexible membrane electrode, which comprises the following steps: S1, preparing an integrated flexible substrate material, and carrying out oxidation treatment for later use; s2, the surface of the oxidized substrate material is subjected to functionalization treatment, and an organic adsorption layer is electroplated on the surface of the substrate through cyclic voltammetry and used for anchoring a double-atomic cluster; s3, preparing a solution containing double atomic clusters, and enabling the double atomic clusters to be uniformly adsorbed on the surface of the functionalized substrate by utilizing electrostatic interaction; and S4, drying the substrate adsorbing the double-atom cluster, and carrying out calcination pyrolysis treatment in a protective atmosphere to prepare the double-atom flexible membrane electrode. According to the invention, through anion and cation adsorption, double atomic clusters are formed by utilizing positive and negative charge attraction of porphyrin iron and cobalt cyanide ions, and the double atomic clusters are embedded into a polypyrrole modified SWCNT film, so that multistage structure integration of active sites, a conductive substrate and a mass transfer channel is realized.

The invention discloses a method for measuring the content of cyanide in sodium nitroprusside by potentiometric titration, which comprises the following steps: taking a cyanide ion selective electrode as an indicator electrode, adding disodium ethylene diamine tetraacetate into a solution to be measured, and measuring the content of cyanide in sodium nitroprusside under an alkaline condition. The method is easy to operate, high in safety, high in sensitivity, good in precision and high in accuracy, and the content of cyanide in sodium nitroprusside and related preparations of sodium nitroprusside can be rapidly and accurately measured.

The invention relates to the technical field of water repair catalytic materials, in particular to a Prussian blue analogue catalytic material as well as a preparation method and application thereof. The Cu-Co double-site Prussian blue analogue catalytic material rich in oxygen vacancy is successfully synthesized through a simple thermal polymerization process, the catalytic material has high reaction activity and high electron mobility, and the preparation process is simple and convenient. And carrying out heat treatment on the precursor in a protective atmosphere to form a three-dimensional crystal network which has oxygen defects and uses cyanide ions as a bridge to connect transition metal ions and copper ions. In the efficient activation process of the PMS, the oxygen vacancy defect can capture oxygen atoms from the PMS in a high-selectivity mode, the internal conductivity and the electron transfer rate are remarkably improved, oriented electron transfer is achieved, and therefore further conversion of the high-salt organic wastewater is promoted.

The present invention relates to a process for synthesizing an active material of the Prussian Blue type analogous to the general formula (I) AwM1xM2y(CN)6(I), comprising at least the step of bringing together, in an aqueous medium, under stirring and in an inert atmosphere, at least one cyanide ion source selected from compounds of formula (II) ACN or (III) AaM1(CN)b with an effective amount of at least one salt of formula (IV) M2v(X)k. It further relates to an electrode ink obtained directly in the reaction medium of this process. Figure: none

The invention relates to the technical field of chemical analysis and detection, and discloses a synthesis method and application of a fluorescent probe for detecting cyanide ions, and the synthesis method comprises the following steps: A, reacting a derivative of R1 with a compound with a reactive group to form a connecting unit X; and B, carrying out a cross-linking reaction on the obtained intermediate product and a cyanide ion reaction group R2 to form a final product of the fluorescent probe, and C, purifying the synthesized fluorescent probe. By optimizing the synthesis method of the fluorescent probe and utilizing the characteristics of simple chemical reaction steps, wide adjustable range of reaction conditions and selection of a reaction solvent, the synthesis method has relatively high operability and industrial production potential. In addition, after synthesis, purification is carried out through recrystallization, liquid chromatography or thin-layer chromatography, and the purity and quality of the product are further improved. The simple and effective synthesis strategy not only reduces the production cost, but also improves the market competitiveness of the fluorescent probe.

The invention relates to the field of fine chemical engineering, and particularly discloses a color stabilizer composition for polyamide and application thereof.The color stabilizer composition comprises a component A and a component B according to the mass ratio of (0.5-3): (3-10), the component A comprises a hindered amine light stabilizer and an ultraviolet light absorber, and the component B comprises a monodentate ligand compound and multivalent metal salt; wherein a monodentate ligand in the monodentate ligand compound is selected from one or more of acetonitrile, pyridine, triphenylphosphine or negatively charged iodide ions, bromide ions, sulfur ions, thiocyanate ions, chloride ions, nitrate ions, hydroxyl ions, isothiocyanate ions, cyanide ions and nitrite ions, and the negatively charged ions appear in the form of a metal ion compound; the invention also discloses an application of the color stabilizer composition in preparation of polyamide products. The color stability of the polyamide material is improved, the quality and performance of the material are improved, and the service life of the material is prolonged.

The invention discloses a photoinduced EDA-based aryl nitrile compound synthesis method, which comprises: in an air atmosphere, dissolving electron-rich methoxy aromatic hydrocarbon, 1, 4-dicyanobenzene and an inorganic alkali in a solvent to form a homogeneous reaction system; a light source containing ultraviolet light with the wavelength ranging from 200 nm to 780 nm is adopted to irradiate the homogeneous reaction system so as to excite the electron-rich methoxy aromatic hydrocarbon and the 1, 4-dicyanobenzene to form an EDA compound; generating an aryl cation free radical intermediate through light-induced single electron transfer, and triggering 1, 4-dicyanobenzene to release cyanide ions; and carrying out nucleophilic substitution reaction on the aryl cation free radical and cyanide ions to break a C (sp2)-O bond and construct a C-N bond to generate the aryl nitrile compound. And efficient and green synthesis of the aryl nitrile compound can be realized.

A corrosion control method and device for changing the condensate stripping tower overhead reflux system, the method comprising the following steps: 1) setting a cyanide ion control content index for the condensate to be refluxed into the ammonia stripping tower overhead, and monitoring the content of cyanide ions in the subsequent reflux condensate; 2) when the cyanide ion content exceeds the control content index, inject polysulfide into the condensate to be stripped. The method finds out the corrosion reason from the perspective of corrosion aggravation, establishes a cyanide ion control index, and when the cyanide ion control index exceeds the standard, the content of cyanide ions in the condensate is consumed by polysulfide. The reduction of cyanide ions can slow down the corrosion efficiency of ammonium carbamate, control the corrosion of the stripping device during the stripping of the condensate, and effectively control the corrosion from the root cause, reducing the risk of unplanned shutdown and subsequent inspection and maintenance costs.

The present disclosure relates to a polydiacetylene-based compound for detecting cyanide ions, a composition including the same, and a chemical sensor, and more particularly, to a polydiacetylene-based compound, which is a polymer of a self-assembly of diacetylene monomers represented by the following Chemical Formulas 1 and 2, a composition including the same, and a chemical sensor.(Chemical Formulas 1 and 2 are as defined in claim 1.)

The invention relates to the technical field of harmless treatment of gold ore cyanidation tailings, in particular to an environment-friendly harmless treatment device for gold ore cyanidation tailings. The medicament feeding mechanism is positioned at the top of the reaction box; the data acquisition mechanism is positioned at the top of the reaction box; and the mixing mechanism is positioned in the reaction box. The reaction box is used for harmless treatment of gold ore cyanidation tailings, a cyanide ion concentration sensor, a pH value sensor and a heavy metal concentration sensor capture core parameters such as cyanide ion concentration, pH value, dissolved oxygen and heavy metal concentration in real time, and data can be directly fed back to the PLC. Data collected by the PLC are respectively displayed at the cyanide ion concentration value display end, the PH value display end and the heavy metal concentration value display end, the PLC can compare the data collected information with a preset threshold value and then control the dosing pump to discharge, and the dosing pump pumps chemicals in the chemical tower into the reaction box through the first connecting pipe and the second connecting pipe.

To provide a method of treating dust collection wastewater, capable of obtaining treated water of a low cyan residual rate including a cyan component present in a thiocyanate ion that can be formed and the total cyanide concentration.SOLUTION: The method of treating dust collection wastewater includes: adding hydrogen peroxide to dust collection wastewater containing suspended matters, cyanide ions, and reductive sulfur components, obtained by subjecting exhaust to a wet dust collection treatment; causing hydrogen peroxide to react in the dust collection wastewater; adding hydrogen peroxide to apply a solid / liquid separation treatment to the dust collection wastewater having reacted with the same, in a solid / liquid separation facility; and supplying a portion of a separated liquid removed of the suspended matters present in the dust collection wastewater in the solid / liquid separation facility to the wet dust collection treatment using a circulation facility, as washing water. In the present method, the concentration of hydrogen peroxide added to the dust collection wastewater is 1.2 times or more as much as the total cyan concentration (mg-CN / L) in the dust collection wastewater, and the oxidation-reduction potential of the dust collection wastewater immediately after the addition of hydrogen peroxide is 200+59×(7-measured value of pH) mV or higher. Hydrogen peroxide is reacted in the dust collection wastewater in the presence of copper in a concentration of 1 mg-Cu / L or higher.SELECTED DRAWING: None

The present invention provides a composite cathode material, a preparation method thereof and an application. The preparation method includes: mixing a phosphorus source, a lithium source and Li x M y N z and calcining to obtain the composite cathode material; wherein, 0 ≤ x < 2, 0.8 ≤ y ≤ 2, 0.5 < z < 0.8; M is a metal ion, N is a ligand ion containing a cyanide ion, and the mixture formed after mixing is acidic. In the present invention, the phosphorus source, the lithium source and L ix M y N z are mixed and calcined. The carbide decomposed by L ix M y N z reacts with the phosphorus source to generate elemental carbon, thereby realizing the atomic-level mixing of M element, C element and Li element, and thus forming a carbon-coated composite cathode material. The process of the present invention is simple, can achieve uniform carbon coating and form a conductive network inside the particles, and effectively improves the electrochemical performance of the composite cathode material.

The present invention provides use of a substance with a Prussian blue structure in the prevention and treatment of pulmonary fibrosis. The Prussian blue structure is a face-centered cubic unit cell comprising X ions, M ions, and cyanide ions. A space group is usually called Fm3m. In the Prussian blue structure, the X ions are connected to nitrogen atoms of cyanide, the M ions are connected by carbon atoms of cyanide, the carbon atoms are alternately coordinated to form a cubic unit cell, and the open framework structure of the Prussian blue has some gap sites and vacancies where A cations can be inserted.

This invention belongs to the field of gold extraction agent technology, specifically relating to a method for preparing a gold extraction agent. The invention provides a method for preparing a gold extraction agent, comprising the following steps: mixing sodium cyanate and iron powder, and carrying out a melt catalytic reaction to obtain the gold extraction agent. This invention uses iron powder as a catalyst, which can effectively promote the polymerization reaction of sodium cyanate. During the catalytic polymerization process, iron atoms can break the carbon-nitrogen triple bond in sodium cyanate into a carbon-nitrogen double bond, with one end of the carbon-nitrogen double bond linked to a sodium atom. The obtained gold extraction agent does not contain free cyanide ions and is therefore non-toxic. In application, the sodium in the obtained gold extraction agent can displace gold in gold ore, thus playing a role in gold refining. Test results from the embodiments show that the gold extraction efficiency of the gold extraction agent provided by this invention is comparable to that of sodium cyanide, and it is safe, environmentally friendly, and non-toxic.

A device for treating complex cyanide ions through an ozone method relates to the technical field of chemical equipment and comprises a device shell, a water inlet pipe and a water outlet pipe, the water inlet pipe and the water outlet pipe are arranged on the two sides of the device shell respectively, a retaining wall is arranged in the device shell, a primary filtering cavity is formed between the retaining wall and the side wall of the device shell, and an upper baffle and a lower baffle are arranged on one side of the retaining wall. The lower baffles and the upper baffles are staggered to form a serpentine channel; one upper baffle and one lower baffle are arranged on the inner walls of the two sides of the device shell to define a secondary filtering cavity, an ozone inlet pipe is arranged in a channel between every two adjacent secondary filtering cavities, one end of each ozone inlet pipe penetrates through the device shell to be connected with an ozone generator, the other end of each ozone inlet pipe is connected with an ozone spray gun, and a nozzle of each ozone spray gun faces the interior of the corresponding secondary filtering cavity. The device for treating the complex cyanide ions by the ozone method is high in treatment speed, high in treatment efficiency and simple and convenient to operate, ozone is used as an oxidizing agent, secondary pollution is avoided, and the effect of environmental protection is achieved while the cyanide ions are removed.

This invention provides a low-cost method for treating water containing cyanide ions. [Solution] A method for treating water to be treated, comprising step (a) of mixing water to be treated containing cyanide ions with hypochlorite, wherein in step (a), the pH of the mixed liquid is maintained at 8.0 or higher and the oxidation-reduction potential at +800mV or higher.

The utility model relates to the technical field of reactors, in particular to a reactor for removing free cyanide ions and copper ions in cuprous cyanide wastewater, which comprises a reactor and a blanking barrel, the blanking barrel is rotatably mounted in the reactor, a driving mechanism is arranged at the top of the reactor, a connecting block is fixedly mounted at the bottom of the blanking barrel, and the connecting block is connected with the driving mechanism. A material guide plate is rotationally mounted at the bottom of the connecting block, and a discharging mechanism is arranged on one side of the connecting block; the driving mechanism is used for rotating the discharging barrel so that the discharging barrel can drive the material guide plate to rotate. The discharging mechanism is used for rotating the material guide plate so that the angle of the material guide plate can be adjusted, the driving mechanism is matched with the discharging mechanism, the driving mechanism is arranged so that the discharging barrel can drive the material guide plate to rotate and adjust, sodium hypochlorite is dispersed more uniformly, the discharging mechanism is arranged so that the angle of the material guide plate can be adjusted, and the discharging efficiency is improved. And sodium sulfide is prevented from adhering to the surface of the guide plate to affect subsequent use.

This application discloses a method for extracting rubidium and cesium and separating potassium and sodium from metal ion wastewater, relating to the field of liquid waste resource recovery technology in the metallurgical industry. This invention utilizes an integrated process of gradient precipitation-pyrolysis-water leaching-multi-stage crystallization, including rubidium and cesium precipitation, pyrolysis, water leaching, secondary precipitation, crystallization, and recrystallization, to separate and extract the main components such as potassium, sodium, rubidium, and cesium from the washing liquid into products such as potassium chloride, sodium chloride, and mixed rubidium and cesium precipitates. This achieves the reduction, resource recovery, and harmless utilization of multi-metal ion wastewater. This technology enables highly selective enrichment of rubidium and cesium, combines pyrolysis to decompose cyanide ions for harmless treatment, and utilizes the difference in potassium and sodium solubility to achieve efficient separation through multi-stage crystallization. It offers advantages such as high product value, good economic benefits, and ease of industrialization, opening up new avenues for the resource utilization of metal ion wastewater.

The invention belongs to the technical field of battery materials, and particularly relates to a Prussian blue positive electrode material and a preparation method thereof. According to the present invention, the low freezing point characteristic of the alcohol solvent is utilized, and the difference between the alcohol-water hydrogen bond acting force and the water-water hydrogen bond acting force is adopted to gradually release the ferrous iron and the ferrous cyanide ions so as to reduce the precipitation rate; the low dielectric constant of the alcohol solvent is utilized, the crystal size is limited at low temperature, nanoscale Prussian blue is formed, the surface area of the nanoscale Prussian blue is increased, and therefore the nanoscale Prussian blue has more contact and ion migration channels with electrolyte. According to the present invention, by using the solubility difference of the alcohol solvent and the water on the reactants, the binding of the reactant particles is performed at the low rate, such that the slow Prussian blue nucleation and growth are achieved, and the Fe (CN) 6 vacancy number is reduced; by utilizing the difference of binding energy between an alcohol solvent and water and coordination metal ions, the introduction of coordination water is reduced in the binding process of ferrous and ferrous cyanide ions, so that the material can have more sodium storage sites in the charge-discharge process, and the capacity is improved.