102 results about "Cyanogen" patented technology

The invention belongs to the technical field of sewage treatment, and particularly relates to a coking phenol-cyanogen sewage treatment system, which comprises a pretreatment stage, a biochemical treatment stage and an advanced treatment stage, a mixing cavity, a flotation cavity, a separation cavity, a scum cavity and a clear water cavity are sequentially formed in the air flotation tank; the scraping plate is movably connected to the upper part of the separation cavity and is used for scraping dross; the recovery valve pipe is arranged below the clear water cavity, and a concentration sensor is arranged in the recovery valve pipe and used for detecting the impurity concentration in the clear water; according to the coking phenol-cyanogen sewage treatment system, the scraping depth of the scraping plate is correspondingly adjusted according to the concentration value of the impurities at the clear water, and the larger the amount of scum in the separation cavity is, the larger the downward moving speed of the corresponding scraping plate is, so that the scum in the separation cavity can be thoroughly and effectively scraped and recycled by the scraping plate.

The utility model discloses a thermal hydrolysis cyanide breaking device, which relates to the technical field of wastewater treatment and comprises a cyanide breaking reactor, a wastewater heat exchanger, a pipeline mixer, a steam mixer, an instrument control valve and the like. After being heated by the wastewater heat exchanger, the wastewater enters a cyanide breaking reactor, and steam enters a steam mixer to heat the wastewater to a specified temperature and then enters the cyanide breaking reactor. The characteristic that the cyanide aqueous solution is easy to hydrolyze is utilized, so that the cyanide aqueous solution is hydrolyzed at the temperature of higher than 140 DEG C to produce sodium formate and ammonia, the toxicity of cyanide is eliminated, high-temperature wastewater discharged from the cyanide breaking reactor enters the wastewater heat exchanger to exchange heat with wastewater to be treated, and heat is recovered; the pressure of the reactor is controlled through a wastewater heat exchanger outlet wastewater outlet pipeline pressure regulating valve. The cyanide wastewater treatment device is reasonable in design, only a small amount of sodium hydroxide is needed for adjusting the pH of wastewater, no chemical agent needs to be added in other procedures, the cyanide wastewater treatment efficiency is improved, and the cost is saved.

The invention provides a method for recycling valuable substances and cyanide in cyanide-containing wastewater, and belongs to the technical field of cyanide-containing wastewater treatment. The method comprises the following steps: firstly, carrying out replacement reaction on a physicochemical material (reducing substance zinc) and a copper-cyanogen complex in the cyanogen-containing wastewater to displace copper, and filtering to obtain filter residues containing zinc and copper, so as to realize copper recovery; in the replacement reaction, the copper-cyanogen complex in the filtrate is converted into a zinc-cyanogen complex with a lower stability constant, and then the zinc in the filtrate is recycled by diaphragm electrolysis. The method specifically comprises the following steps: dividing an electrolytic cell into a cathode region and an anode region by utilizing a membrane material, and enabling electrode reactions to be independently carried out, so that cyanide is prevented from entering the anode region to generate electrochemical oxidation and the decomposition of the cyanide is inhibited, and the cyanide is recycled in a solution for cyclic utilization; and then an alkali-resistant titanium-based coating electrode is used as an anode plate, a porous material is used as a cathode plate, recovery of zinc on the cathode plate is promoted, and recovery of valuable metal zinc and copper and cyclic utilization of cyanide are achieved.

The invention discloses a pretreatment method and system for sulfur-containing and arsenic-containing ore. The method comprises the steps of crushing, alkaline wet ore grinding, strong alkaline pre-oxidation, cyanidation leaching, cyanogen removal treatment and high alkaline flotation. In the pretreatment process, liquid caustic soda is added into an ore grinding system, and oxygen is introduced into a cyanidation serial stirring tank for pre-oxidation treatment, so that the oxidation activation effect of the arsenic-sulfur minerals is remarkably enhanced, and the gold release efficiency and the cyanidation leaching rate are improved. The same group of serially connected stirring tanks is adopted for pre-oxidation and cyanidation leaching, and the first three stirring tanks are used for pre-oxidation and subsequently communicated with the stirring tanks for cyanidation reaction, so that process integration and equipment reuse are realized. Experimental results show that the comprehensive recovery rate of gold can be remarkably increased, the agent consumption can be reduced, and the method has good industrial application value.

The embodiment of the invention relates to the photovoltaic field, and provides a cyanide-free electroplating silver-coated copper conductive material, a preparation method thereof and a crystalline silicon solar cell. The silver-coated copper electrode provided by the embodiment of the invention comprises a copper core and a copper-tin alloy electroplated layer coated on the surface of the copper core, the surface of the pre-plating material is coated with the silver electroplating layer; the surface of the silver-coated copper material is coated with the self-repairing layer; wherein the self-repairing layer comprises a resin film and a pH response type microcapsule, the microcapsule is embedded in the resin film, and the microcapsule is filled with an ammonium molybdate corrosion inhibitor. The copper-silver interface bonding force can be improved through the copper-tin alloy electroplated layer, and the silver layer material does not contain cyanogen and is environmentally friendly; the corrosion inhibitor in the pH response type microcapsule in the self-repairing film layer on the surface of the silver layer is released under a specific pH condition to form a protection film on the silver layer again, so that the self-repairing purpose is achieved, and the dynamic protection effect is achieved.

The invention relates to an efficient copper removal and recycling process for copper-cyanogen complex wastewater, which comprises the following steps: (1) critical acidification-selective crystallization of the copper-cyanogen complex wastewater: directionally recombining a copper-cyanogen complex to generate insoluble CuCN crystals by accurately regulating and controlling the pH value of the wastewater; (2) rotational flow enhanced crystallization: separating CuCN crystals from overflow liquid through a hydrocyclone; (3) gradient activation of a composite vulcanizing agent for deep copper removal: enabling the fine CuCN particles and the dissolved-state low-coordination copper-cyanogen complex to react to generate insoluble CuS crystals by adjusting the pH value and adding the composite vulcanizing agent; and (4) magnetic seed enhanced separation: carrying out magnetic separation by adopting modified magnetic seeds and a low-intensity magnetic separator, separating CuS magnetic flocs from the wastewater, and finally obtaining purified tail liquid. According to the closed-loop process, copper in the copper-cyanogen complex wastewater can be efficiently removed and recovered, the purified tail liquid can be reused for cyanidation leaching operation, the unit consumption of sodium cyanide is remarkably reduced, the leaching rate of gold and silver is increased, and zero discharge of wastewater and full recovery of copper resources are truly achieved.

The invention relates to a lithium ion electrolyte and a battery, and belongs to the technical field of lithium ion batteries. The lithium ion electrolyte comprises a lithium salt, an organic solvent and a first additive, wherein the organic solvent comprises a first solvent, and the first solvent is selected from carbonic ester compounds substituted by hydrogen, C1-C5 alkyl, phenyl and tolyl; the first additive is selected from hydrogen, fluorine and cyano-substituted nitrile fluorobenzene compounds; in percentage by mass, the content of the first additive in the electrolyte is b% and is smaller than or equal to blt; 5. By adopting a specific type of electrolyte solvent and additive combination, the stability of an electrolyte-positive electrode / negative electrode interface can be improved, the high-temperature performance of the LCO-Gr system lithium ion battery under high voltage is remarkably improved, and the high-temperature cycle performance, the standing cycle performance, the high-temperature storage performance and the like are improved.

The invention provides an up-to-standard treatment method for wastewater containing ammonia nitrogen and difficult-to-treat copper-cyanogen, and belongs to the field of wastewater treatment.The wastewater enters a first-stage oxidation reactor at first, the stable structure of a copper-cyanogen complex is destroyed by adding an oxidizing agent, then a copper removal agent and a pH adjusting agent are added into a copper removal reactor, copper ions are precipitated and separated out, and then the wastewater enters a second-stage oxidation reactor; the method comprises the following steps: carrying out oxidation and solid-liquid separation to remove copper sludge, carrying out oxidation and solid-liquid separation on treated overflow liquid and press filtrate after convergence so as to thoroughly remove residual cyanide and organic matters, and finally, conveying purified liquid which is subjected to two-stage oxidation and is subjected to copper cyanide interference removal to a biological reaction system to carry out biochemical reaction. And finally, the effluent reaches the recycling or discharging standard. The method effectively solves the problem of toxicity inhibition of difficult-to-treat wastewater on a biochemical system, realizes step-by-step removal and resource utilization of toxic and harmful substances, ensures stable and up-to-standard reuse or discharge of effluent, and has the advantages of efficient treatment, economy, environmental protection and convenient operation.

The invention discloses a coking phenol-cyanogen wastewater refrigeration system and method, the refrigeration system comprises a wastewater buffer pool, a heat exchanger, a cooling-water machine, a cooling tower and a chilled water buffer pool, and the above structures are connected through pipelines to form a wastewater circulation loop, a chilled water circulation loop and a cooling water circulation loop. The temperature of the coking phenol-cyanogen wastewater is accurately controlled through the synergistic effect of the three circulation loops, the temperature of the wastewater cooled by the heat exchanger can be stably controlled at 25-30 DEG C (the optimum survival interval of microorganisms), the problem of microorganism inactivation caused by the fact that the high-temperature wastewater directly enters a biochemical pool is avoided, and the biochemical treatment efficiency is improved.

The invention belongs to the technical field of coatings, and particularly relates to a waterproof and anticorrosive two-component cyanogen setting composite coating and a preparation method thereof. Comprising the following steps: preparing anti-corrosion functional alcohol ether; a dynamic hydrophobic migration microsphere filler; carrying out hydrophilic modification on isocyanate; and blending prepolymers. In the preparation process of preparing the dynamic hydrophobic migration microspheres and then adding the waterproof and anticorrosive bi-component cyanogen setting composite coating, the composite coating has stable dispersity and can form a uniform phase, and in the process of heating and curing after coating, hydrophobic components can be released to migrate to the surface of the coating, so that the waterproof and anticorrosive bi-component cyanogen setting composite coating is formed. Therefore, a hydrophobic layer is formed on the surface, the waterproof performance of the coating after film formation is improved, substances in the inner layer can react better, and the adhesive force of the coating is enhanced.

The application discloses a kind of hydrolysis-resistant acetylacetamide modified polyvinyl alcohol and preparation method thereof, and the preparation method comprises the following steps: double vinyl ketone and first and alcohol amine compound are reacted to generate N-(hydroxyalkyl) acetylacetamide intermediate;Then trichloro cyanogen and N-(hydroxyalkyl) acetylacetamide intermediate are reacted to generate 3,5-bis[acetylacetamide alkoxyl] monochloro s-triazine;Finally, 3,5-bis[acetylacetamide alkoxyl] monochloro s-triazine is reacted with PVA in polar solvent to generate AAM-PVA.The AAM-PVA prepared in the application can be used as a protective colloid for polyvinyl acetate emulsion polymerization, and the prepared emulsion adhesive has obvious improvement in water resistance, tensile strength and stability;The raw materials of the application are cheap and easy to obtain, the preparation process is simple, the reaction conditions are mild, and there is no waste water and waste gas emission.

The utility model provides a biomass methanol sewage treatment device which comprises the following steps: S1, gasification wastewater, ground flushing water, methanol rectification wastewater, test wastewater and domestic sewage are generated in a biomass methanol production process; carrying out oil removal, two-stage air flotation reaction, deamination reaction, coagulation cyanogen breaking and Fenton pre-oxidation treatment on the gasified wastewater to obtain pretreated gasified wastewater; s2, performing comprehensive treatment on the ground flushing water, the methanol rectification wastewater, the test wastewater, the domestic sewage and the pretreated gasification wastewater. The biomass methanol wastewater treatment system has the beneficial effects that the high-concentration gasified wastewater is pretreated by adopting classified and quality-divided treatment, the pretreated wastewater is biodegradable wastewater, and a comprehensive treatment process which mainly adopts biochemical treatment and is high-grade oxidation security is adopted, so that the treatment cost of the biomass methanol wastewater is reduced, and the effluent is ensured to reach the emission standard of pollutants in the petrochemical industry.

The utility model discloses a low-cost device for treating high-concentration cyanide-containing wastewater, which comprises a first wastewater delivery pump (1), a primary reaction tank (4), a secondary reaction tank (6), a regulating tank (7) and a second wastewater delivery pump (8) which are sequentially connected, the primary reaction tank (4) is connected with a special cyanide breaking device (2) through a pipeline, and the regulating tank (7) is connected with a NaOH solution storage tank (3) through a pipeline. According to the method disclosed by the utility model, the oxidizing agent is prepared by adopting the special cyanide breaking device, the strong oxidizing property of the oxidizing agent is utilized, the cyanide breaking reaction is carried out on the high-concentration cyanide-containing wastewater treatment device, and the wastewater can stably reach the standard without adjusting the pH value of the wastewater on the basis of not changing the original treatment device.

The invention relates to the technical field of building construction, and discloses a cold-bridge-prevention thermal insulation construction method for a wall body of a refrigeration house, which comprises the following steps of: pre-treating a wall surface before construction, then directly spraying cyanogen condensate on the treated wall surface on the cleaned wall surface, and designing and installing wood and T-shaped piles in order to enable the cyanogen condensate to fully permeate into a base layer. Then, a steel row gun is used for installing the wall surface, polyurethane foaming spraying construction is conducted after installation, the thickness of foam sprayed in a single layer is conducted for the first time, an anti-crack fiber net is hung and a transverse cork wood keel is installed when the foam is sprayed to be half of the design thickness, a polyurethane heat preservation layer is sprayed to be the design thickness, and after polyurethane spraying foaming finishing is completed, the position of a door and window opening is located at the position of a door and window opening; and wall surface heat preservation and color steel plate construction are completed. By the adoption of the double-layer spraying cyanogen condensation waterproof vapor-proof layer, effective moisture prevention and air tightness are achieved, the effect of greatly reducing moisture permeation in the refrigeration house is achieved, formation of a cold bridge is avoided, and the energy-saving effect of the refrigeration house is improved.

The application discloses the use of carbon cyanogen - 4 trifluoromethoxy benzyl hydrazone in the prevention and treatment of candida infection, belonging to the technical field of candida infection prevention and treatment. Carbon cyanogen - 4 trifluoromethoxy benzyl hydrazone is used as the only active ingredient for preparing a medicine for preventing or treating diseases caused by candida infection, wherein the candida is candida albicans and / or candida auris; or it is used for preparing a bacteriostatic and / or bactericidal product of candida, wherein the candida is candida albicans and / or candida auris. FCCP shows good inhibition of strain growth, good inhibition of biofilm effect and good mitochondria breaking effect in the antibacterial experiments of various candida (wild type candida albicans, drug resistant candida albicans and drug resistant candida auris). Thus, a new treatment drug for candida albicans and candida auris infection is provided.

The invention relates to the field of polyacrylate photoresists, in particular to a photoresist film-forming resin raw material and a preparation method thereof.The preparation method comprises the steps that cyclopentadiene is dropwise added into a mixed solution of alpha-bromomethyl acrylate and a solvent, the temperature is controlled, a reaction is conducted for 4 h, and 5-bromodicyclohept-2-ene-5-carboxylic acid methyl ester is prepared; the preparation method comprises the following steps: adding alkali into 5-bromo dicycloheptyl-2-ene-5-carboxylic acid methyl ester, and hydrolyzing at 20-30 DEG C for 2 hours to obtain a hydrolysis product; the hydrolysis product is subjected to epoxidation and hydrolysis with hydrogen peroxide under the condition of glacial acetic acid, and 1-bromine-5-hydroxy-3-oxa-tricyclic nonyl-2-ketone is obtained; according to the method, 1-bromo-5-hydroxy-3-oxa-tricyclic nonyl-2-ketone is cyanided by cuprous cyanide to prepare the 1-cyano-5-hydroxy-3-oxa-tricyclic nonyl-2-ketone monomer, and the method has the advantages that the raw materials are convenient and easy to obtain, the route is short, the reaction conditions are relatively mild, the operation safety is relatively high, the total yield is remarkably improved, and the like.

The utility model relates to the technical field of cyanogen-containing waste gas incinerators, in particular to a lining structure of a cyanogen-containing waste gas incinerator. The lining structure of the cyanide-containing waste gas incinerator comprises a furnace wall shell, a heat insulation layer is arranged on the inner side of the furnace wall shell, a wear-resistant fireproof layer is arranged on the inner side of the heat insulation layer, and Y-shaped anchoring nails and C-shaped buckles are connected to the furnace wall shell. According to the structure, through the arrangement of the Y-shaped anchoring nails, the integrity and grabbing force of the lining structure are greatly enhanced, and the thermal shock resistance of the lining is improved; the C-shaped buckles and the corundum mullite anchoring bricks are used in cooperation, the anchoring bricks are embedded in the castable, when the lining is subjected to stress and cracks occur, the cracks are interrupted, and the lining is prevented from falling off.

The invention discloses a preparation method of a photocatalytic silicon-containing 1.1-diaryl compound, which realizes that olefin simultaneously reacts with aromatic cyanide and a silicon-boron compound to generate a silicon arylation product of olefin in the presence of photocatalysis and alkali. And reducing the aromatic cyanogen compound through a photocatalyst to generate aromatic cyanogen anion free radicals and an oxidation state. Then the alkali-silicon-boron complex is subjected to photocatalytic oxidation in an oxidation state, catalytic regeneration and cation free radicals of the alkali-silicon-boron complex are achieved, then silicon-boron bonds in the cation free radicals of the alkali-silicon-boron complex are broken to generate silicon free radicals, and the silicon free radicals and olefin are subjected to addition to generate alkyl free radicals; and finally, coupling the generated alkyl free radical with the aromatic cyanide anion free radical to generate the target olefin silicon arylation product. According to the invention, the aryl group and the silicon free radical are introduced into olefin at the same time, and are used for post-modification application of natural products and drug derivatives, and the method has the value of developing functional compounds which can be used for industrial synthesis and contain silicon groups and aryl groups.

The invention discloses a natural ventilation cooling tower inner wall corrosion prevention method adaptive to an extreme temperature difference environment, and belongs to the technical field of cooling tower corrosion prevention. Comprising the steps that leakage treatment is conducted, specifically, according to cracks, honeycomb-shaped defects and holes in the inner wall of the cooling tower, drilling is conducted by adopting drilling parameters matched with the extreme temperature difference, after a grouting water stop needle is embedded, a corresponding grouting material is injected according to the dry and wet state of a leakage part, after grouting is completed, preset time is observed, and after it is confirmed that no leakage exists, the grouting needle is cut off, and a needle hole is plugged; the exposed ribs on the inner wall of the cooling tower are subjected to rust removal, a cracked and warped concrete protection layer and loose concrete are chiseled away, the concrete missing position is repaired with anti-crack mortar, and the water content of the inner wall is controlled to be smaller than or equal to 8% by flushing a cylinder body for standby application; and anti-corrosion coating is conducted, specifically, the surface of the treated base layer is sequentially coated with cyanogen setting permeable seal primer, cyanogen setting intermediate paint and cyanogen setting waterproof and anti-corrosion finish paint.

The invention belongs to the technical field of organic electroluminescent materials, and provides an electron transport material for an organic electroluminescent device and a preparation method of the electron transport material. The 9-alkyl-9-cyanogen-substituted aryl (or cyanogen-substituted nitrogen-containing heteroaryl) fluorene group with a substituent group enables the molecular structure to be twisted and the intermolecular interaction force to be weakened, cyanogen and pyridine enable the compound to have the electron-withdrawing property, electron transmission is facilitated, compounding of electrons and holes in a light-emitting layer is enhanced, and the light-emitting efficiency is improved. Aryl bridged triazine and pyrimidine six-membered nitrogen heterocycle are used for further improving the transmission performance of electrons, and as an electron transmission layer material of the organic electroluminescent device, the organic electroluminescent device has the characteristics of low driving voltage, high luminous efficiency and long service life.

The utility model discloses a small-diameter cyanuric chloride material pipe, which relates to the technical field of cyanuric chloride production and comprises a material pipe, sealing end plates are arranged at the left end and the right end of the outer surface of the material pipe, and a heat conduction oil pipe is arranged between the two sealing end plates. The outer edges of the two sealing end plates extend out of the heat conduction oil pipe to be provided with connecting edges, limiting end plates are arranged on the outer sides of the outer surfaces of the two sealing end plates, and a heat preservation pipe is arranged between the outer edges of the two limiting end plates. A heat preservation material is arranged between the heat preservation pipe and the heat conduction oil pipe and between the two limiting end plates, a punching partition plate is arranged in the middle of the front side and the rear side between the material pipe and the heat conduction oil pipe, the flow speed of a solution in the pipeline is increased, the temperature of the material pipe is increased, and the temperature of cyanuric chloride materials in the material pipe is increased; the crystallization of cyanuric chloride in the material pipe due to the characteristics of cyanuric chloride is reduced, and the blockage condition of the material pipe is reduced.

The invention discloses a nano-channel based on Pd-Co cyanogen gel nano-enzyme, a preparation method and application of the nano-channel in glucose detection, and belongs to the technical field of biosensors. The nano-channel based on Pd-Co cyanogen glue nano-enzyme is a TiO2 nano-channel (TiNM) with two open ends, the two open ends are a large opening end and a small opening end respectively, metal organic frameworks (MOFs) are grown in situ in the TiNM through a biomimetic mineralization method to immobilize Pd-Co cyanogen glue nano-enzyme molecules, and a metal organic framework composite nano-enzyme structure is formed. Meanwhile, the end face of the small opening end is coated with a pH response polymer to form a gating structure. Glucose generates gluconic acid and hydrogen peroxide under catalysis of Pd-Co cyanogen gel nano-enzyme, the pH change in the channel is triggered, and the pH response polymer is dissolved, so that the gating structure is activated to be opened. The sensor is used for glucose detection, has relatively high selectivity and relatively strong anti-interference capability on glucose, and has good repeatability and operation stability.

The invention relates to the technical field of cyanogen-containing wastewater treatment, and discloses a treatment device for extracting cyanogen-containing wastewater from gold ores, which comprises a treatment box, and also comprises a partition plate fixedly connected to the interior of the treatment box; the mixing mechanism is arranged between the partition plate and the bottom of the treatment box and is used for mixing wastewater between the partition plate and the bottom of the treatment box; the groove is formed in the top of the partition plate, and positioning mechanisms are symmetrically arranged on the side, close to the groove, of the partition plate; the inclined plate is rotationally connected to the top of the partition plate, a sealing assembly is arranged at the end of the inclined plate, an auxiliary shaft is rotationally connected to the inclined plate, and a stirring wheel and an aeration disc are fixedly connected to the auxiliary shaft and used for mixing wastewater between the top of the inclined plate and the treatment box; integrated treatment of wastewater pretreatment, sedimentation and cyanide breaking treatment can be achieved, the occupied space of equipment is small, the energy consumption is small, the wastewater mixing effect is good, and the wastewater treatment efficiency is high.

The invention discloses a wastewater treatment process for removing cyanide in sewage by utilizing a Fenton reaction mechanism, and belongs to the technical field of water treatment. The process comprises the following steps: adjusting the cyanogen-containing wastewater to be alkaline, then adding a modified ferrous catalyst, and carrying out a Fenton reaction. The process provided by the invention aims to effectively remove the cyanide in the sewage, and by optimizing the reaction conditions and using the catalyst, the process provided by the invention can realize that the cyanide removal rate reaches 90% or above, and has good economical efficiency and environmental friendliness. The method is suitable for industrial sewage treatment, and is especially suitable for treatment of cyanide-containing wastewater generated in metal smelting and chemical industries.

The invention provides a method for colorimetrically detecting amphetamine and methyamphetamine in drugs based on furyl probes. The furyl probes in the method are furan-indanone, furan-indene dicyanide and furan-indene cyanide respectively. Wherein before and after amphetamine or methyl amphetamine is added into the probe furan-indanone, the color of the solution is changed from faint yellow to rose red; before and after amphetamine or methyl amphetamine is added into the probe furan-indene dicyanide, the color of the solution is changed from brown yellow to blue; the color of the solution is changed from yellow to orange before and after amphetamine is added into the probe furan-indene cyanogen, and the color of the solution is changed from yellow to green before and after methylamphetamine is added into the probe furan-indene cyanogen. Rapid colorimetric distinguishing of single amphetamine or methyamphetamine and qualitative detection of a mixture of amphetamine and methyamphetamine are achieved. The method has no special limitation in use, can quickly complete qualitative detection without pretreatment of an object to be detected, is simple to operate, economical, practical, high in specificity and sensitivity, stable and repeatable in result, and can be practically applied and popularized.

The invention relates to a preparation method and application of a Prussian blue material, and belongs to the field of new battery materials. The method aims to solve the technical problems that an existing preparation method is long in reaction time and harsh in process condition and has the risk of cyanide generation. A mixed solution prepared from a chelate and a cyanogen source is placed in a microwave reactor, the temperature is raised to 20-180 DEG C at the speed of 1-10 DEG C / min, heat preservation is conducted for 1-60 min, the Prussian blue material is prepared, the chelate is selected from glycine and ethylenediamine tetraacetic acid, and the cyanogen source comprises compounds such as sodium ferrocyanide. The performance of the material is synergistically optimized by adding a sodium source, a reducing agent and a surfactant. According to the preparation method, the process energy consumption is low, the risk of cyanide generation is avoided, the obtained material shows excellent performance in a sodium ion battery, 67.39% of capacity is kept after 400 times of circulation under the current density of 200mA / g, and a rate test shows that the discharge specific capacity of 78.92 mAh / g is still kept at the discharge specific capacity of 800mA / g. According to the invention, efficient and safe preparation of the Prussian blue material and large-scale application of the Prussian blue material in energy storage devices are realized.

The application belongs to the technical field of pharmaceutical chemistry synthesis, and particularly relates to a synthesis method of a fluorofelarana intermediate 2-methyl-4-acetylbenzoic acid. In the application, o-chlorotoluene and acetyl chloride are reacted under the action of anhydrous aluminum chloride to generate 4-chloro-3-methylacetophenone; the 4-chloro-3-methylacetophenone and acetonitrile are catalyzed by Ni to generate 4-acetyl-2-methylbenzonitrile; and then the 4-acetyl-2-methylbenzonitrile is hydrolyzed to generate 2-methyl-4-acetylbenzoic acid. The application has the beneficial effect that acetonitrile is used as a cyanogen to replace halogen, and a highly toxic cyanide is abandoned, so that the whole process is safer and more environmentally friendly, the production of three wastes is reduced, and the synthesis cost of 2-methyl-4-acetylbenzoic acid is greatly reduced.

The invention discloses a synthesis method of limidoterol, and belongs to the technical field of medicine synthesis. The method comprises the following steps: coupling cyclobutanone oxime and a caffeic acid derivative under the catalysis of ferrous acetylacetonate, a chlorobenzene solvent and the protection of nitrogen to obtain a decarboxylated cyanogen alkylation intermediate; oxidizing the intermediate with m-chloroperoxybenzoic acid in dichloromethane in the presence of sodium carbonate to obtain a vicinal diol monoester intermediate; catalyzing by cobalt chloride in methanol, reducing by sodium borohydride, and protecting by Boc2O to obtain a cyclized precursor; cyclizing the precursor in tetrahydrofuran by using sodium hydride to obtain a cyclized intermediate; and performing deprotection to obtain the limiterol. According to the method, dangerous reagents and processes are not used, the safety is high, and no heavy metal residues exist; the cost is low, precious metals are not needed, the post-treatment operation is simple and convenient, a complex purification process is not needed, and the total yield reaches 21%; process conditions are mild, normal pressure and conventional heating modes are adopted, and industrial production is easy to realize.

The invention discloses a preparation method of a pure iodine broadband gap perovskite solar cell based on difluorophthalonitrile passivation, and relates to the technical field of solar cells. According to the cell, the surface of perovskite is treated through difluorophthalonitrile, on one hand, fluorine atoms and cyano groups have strong electronegativity, so that the center of a benzene ring is positively charged, charged iodine defects can be attracted through anion-pi interaction, further diffusion of the iodine defects is prevented, and ion migration is inhibited; on the other hand, fluorine atoms can interact with hydrogen atoms on organic cations in perovskite through hydrogen bonds, organic components are stabilized, and volatilization or decomposition of the organic components is inhibited. And fluorine can also form a hydrophobic protection layer on the surface of the perovskite, so that the environmental stability of the perovskite cell is improved. On the basis, the surface and interface defects of the perovskite are obviously reduced, and ion migration and non-radiative recombination are inhibited, so that the photoelectric conversion efficiency of the perovskite solar cell is improved, and the hysteresis effect of the device is reduced.

The invention discloses a cyanogen removal agent and a preparation method thereof, and relates to the technical field of industrial water treatment.The cyanogen removal agent is prepared from polydiallyldimethylammonium chloride, polyhydric alcohol and polyacrylamide, and the preparation method comprises the steps that polyhydric alcohol is added into water and stirred through a stirrer, then polydiallyldimethylammonium chloride is added, stirring continues to be carried out, and the polydiallyldimethylammonium chloride is obtained; finally, adding polyacrylamide, and stirring until the mixture is uniformly mixed, so as to obtain a cyanogen removal agent water solution after the mixture is stable; compared with the prior art, the invention has multiple effects of cyanogen removal, coagulation, suspended matter removal and the like, and the formed cyanide precipitate cannot be reversed; the dosage of chemicals is small, and the sludge amount is low; the operation is convenient and simple, the raw water treatment flow does not need to be changed, large equipment and harsh reaction conditions do not need to be additionally arranged, and complex debugging is not needed.