150 results about "Sodium bromide" patented technology

The invention provides a preparation method of an acid-resistant and chlorine-corrosion-resistant porous composite electrode and a device constructed on the basis of the electrode and used for preparing hydrogen and chlorine by electrolyzing a sodium chloride solution, two cavities are provided, an acid or neutral saturated sodium chloride solution is filled in the cavities, the cavities are separated by a proton exchange membrane or a diaphragm, and the proton exchange membrane or the diaphragm is filled in the cavities. And in the electrolysis process, the cathode generates high-purity hydrogen, the anode generates high-purity chlorine, the chlorine is absorbed by sodium hydroxide in the gas collection bottle and generates sodium hypochlorite, or the chlorine is introduced into a sodium bromide / sodium iodide solution to replace bromine / iodine elementary substances, and the chlorine is discharged from the gas collection bottle. The sodium hypochlorite solution and the bromine / iodine water are used for disinfection and sterilization experiments. The corrosion-resistant porous composite electrode for electrolysis of an acidic or neutral saturated sodium chloride solution is prepared, the electrolysis voltage of the corrosion-resistant porous composite electrode is further reduced by loading a cathode / anode catalyst, and an acidic or neutral saturated sodium chloride solution electrolysis device constructed based on the electrode can be used for preparing high-purity hydrogen and chlorine.

The invention relates to a method for extracting bromine from a bromine-containing water sample through electrooxidation, in particular to a method for extracting bromine from brine containing various impurity ions, especially high-concentration Cl <-> ions and low-concentration Br <-> ions, which is mainly used for reducing the interference of the Cl <-> ions and improving the recovery rate of the Br <-> ions by selecting a proper oxidation potential. The process is used for optimally selecting the oxidation potential of bromine ions so as to achieve high-recovery-rate bromine extraction, and comprises the following steps: 1) adjusting the pH value of a bromine-containing water sample to be acidic; 2) carrying out electrochemical oxidation on the bromine-containing water sample subjected to acid adjustment to convert bromine ions into bromine gas; and 3) blowing the generated bromine gas to the absorption device through the aeration device. The hydrogen bromide solution is introduced to adjust the pH of the absorption product solution to be acidic, so that bromate is converted into bromide, and finally, a high-quality sodium bromide product can be obtained.

The invention provides a synthesis method of a bromide ion adsorbent for salt lake bromine extraction, and belongs to the technical field of adsorbent preparation, a mixed solution of strontium chloride and manganese chloride and a mixed solution of sodium phosphate and sodium hydroxide are subjected to precipitation reaction to obtain A-Sr4Mn6 (PO4) 6 (OH) 2; the preparation method comprises the following steps: reacting A-Sr4Mn6 (PO4) 6 (OH) 2 with a sodium bromide solution to obtain B-Sr4Mn6 (PO4) 6Br2; and reacting the B-Sr4Mn6 (PO4) 6Br2 with a sodium hydroxide solution to obtain Sr4Mn6 (PO4) 6 (OH) 2, namely the bromide ion adsorbent. The prepared adsorbent can selectively adsorb bromide ions from high-salt brine, and has the advantages of high adsorption capacity, high selectivity, high recyclability and the like; in brine with extremely high chloride ion concentration, low-concentration bromide ions can be selectively adsorbed without being influenced by high-concentration chloride ions; in a high-salt water body, the adsorption capacity on bromide ions is higher; the selective adsorption separation of the chloride ions and the bromide ions is realized.

The invention discloses a method for extracting micro-plastics in soil of a refuse landfill. The method comprises the following steps: pretreating a refuse landfill soil sample to obtain sample soil; the sample soil and an extracting agent are fully mixed and oscillated and then stand for layering, first supernate is obtained, the extracting agent is added at least twice, the types of the extracting agent added each time are different, and the extracting agent added each time is one of saturated sodium chloride, saturated sodium bromide and saturated sodium iodide; the first supernate is extracted and fully mixed with a digesting agent, the mixture is shaken and then stands for layering again, second supernate is obtained, and the digesting agent is at least one of 30% hydrogen peroxide, a Fenton reagent, pepsin and trypsin; and filtering the second supernatant to obtain the micro-plastic. Therefore, the extraction method provided by the embodiment of the invention has multiple technical effects of high efficiency, deep digestion, accurate filtration, wide applicability, environmental friendliness and the like.

The invention relates to the technical field of sewage treatment, and discloses a photocatalytic material and a preparation method and application thereof.The method comprises the following steps that bismuth nitrate pentahydrate and sodium bromide are added into a mannitol solution according to the molar ratio of 1: 1.5, and ultrasonic dispersion is conducted to form turbid liquid; adding arginine into the turbid liquid, wherein the molar ratio of the arginine to the bismuth nitrate pentahydrate is (0-2.5): 1; adjusting the pH value of the turbid liquid and stirring to obtain a precipitate; the precipitate is filtered, washed and dried, and the photocatalytic material nVBi-(110) BiOBr is obtained.By means of the photocatalytic material, the removal rate of hexavalent chromium in alkaline wastewater with the pH being 7-10 can still exceed 90% within a short time, the photocatalytic material shows excellent stability and reaction activity, the technical problem that hexavalent chromium is difficult to remove efficiently in the alkaline environment is successfully solved, and the photocatalytic material has good application prospects. The method has important environmental application value and popularization potential.

The invention discloses a preparation method of a fucoidan oligomer, which realizes efficient degradation of fucoidan under specific conditions by strictly controlling the addition amount of TEMPO, sodium bromide and sodium hypochlorite. Specifically, the ratio of the addition amount of TEMPO to the mass of fucoidan sulfate is 0.5-5%, the ratio of sodium bromide to fucoidan sulfate is 5-40%, the use amount ratio of fucoidan sulfate to sodium hypochlorite is 1 g: (0.1-10) mmoL, strong acid or enzyme preparations do not need to be added, and auxiliary means such as microwaves or ultrasound are not depended on, so that the preparation process is simple, and the preparation cost is low. The oligomer with the average molecular weight lower than 80 kDa can be obtained within one hour, the oligomer with the average molecular weight about 20 kDa can be obtained within four hours, and meanwhile the content of sulfate groups is kept to be about 25%. The functional groups of the fucoidan are hardly damaged, and the prepared oligomer has a remarkable effect in the aspect of in-vitro anticoagulant activity.

The invention discloses a preparation process of 2-bromoheptafluoropropane, which takes heptafluoropropane as a raw material to carry out bromination reaction, specifically, hydrogen on a No.2 carbon atom is substituted by bromine to generate 2-bromoheptafluoropropane, and hydrogen bromide is generated at the same time. And hydrogen bromide is absorbed by water and then is treated by liquid caustic soda to generate sodium bromide.

The invention provides a method for synthesizing 2-bromoethanol through selective electrooxidation of ethylene by taking a sodium bromide solution as a bromine source mediation, which comprises the following steps: reacting ethylene gas as a raw material with a reaction system taking hydrophobic carbon paper as a working electrode, and carrying out constant-potential electrochemical selective oxidation to obtain a corresponding alcohol compound at the reaction potential of 0.5-1.3 V. According to the method, high-efficiency and high-selectivity synthesis of 2-bromoethanol can be realized in a relatively wide potential range, and the method takes a cheap, easily available and efficient carbon material as an electrode, is green and safe, takes sodium bromide as a bromine source and water as a hydrogen source, does not need an additional hydrogen source, is mild in reaction condition, does not need heating, is simple and convenient to operate, and is easy to recover a catalyst.

This invention provides a method for synthesizing a sulfonylpyrazole intermediate, belonging to the field of herbicide intermediate preparation technology. The method includes a condensation reaction of glyoxylic acid and hydroxylamine to generate 2-(hydroxyimino)acetic acid, followed by a chlorobromination reaction of the 2-(hydroxyimino)acetic acid to generate a chlorobromination intermediate. The chlorobromination intermediate then reacts with isobutylene to generate a sulfonylpyrazole intermediate. The key feature is that the chlorobromination reaction is carried out in the presence of sodium bromide and chlorine. This invention can maintain a stable reaction environment while improving the yield and purity of the intermediate product.

The application relates to the technical field of crystallization, in particular to a sodium bromide production device and a production method thereof. The device comprises a base, the upper end surface of the base is fixedly connected with a shell, a crystallization mechanism comprises a crystallization box fixedly connected with the upper half portion in the shell, a cross partition plate is fixedly connected in the crystallization box, the cross partition plate divides the crystallization box into multiple crystallization zones with the same volume, one vibration guiding assembly, two resonance assemblies and one liquid level detector are arranged in each crystallization zone, and a flip cover is hingedly connected with the upper end surface of the crystallization box. Through the cross partition plate, the vibration guiding assembly and the resonance assembly in the crystallization mechanism, the sodium bromide waiting for crystallization in the crystallization box can be subjected to partitioned and uniform crystallization, the vibration wave can be transmitted to the detector by the vibration guiding assembly to master the crystallization condition, the uniformity and the quality of the sodium bromide crystallization can be improved, and the uniformity and the efficiency of the crystallization process can be effectively improved.

This invention relates to a method for treating sodium bromide wastewater during the production of photoinitiators. The method includes vacuum distilling the sodium bromide wastewater in the presence of an adsorbent until sodium bromide precipitates, adding sulfuric acid and mixing, filtering, and adding hydrogen peroxide to the filtrate to react and obtain bromine. The bromine is then collected by distillation and separation. The method described in this invention can recover bromine from the wastewater during the preparation of photoinitiators and convert it into bromine, thereby achieving the recycling of bromine, reducing process costs and the pressure of treating waste gas, wastewater, and solid waste.

The invention belongs to the technical field of dibromohydantoin production, and particularly provides a dibromohydantoin synthesis method which comprises the following steps: S1, preparing a raw material aqueous solution, namely respectively mixing dimethyl hydantoin, sodium bromide and liquid caustic soda NaOH with deionized water to form a dimethyl hydantoin aqueous solution, a sodium bromide aqueous solution and a liquid caustic soda NaOH aqueous solution; s2, premixing the raw material aqueous solution, namely mixing the aqueous solution of dimethyl hydantoin, sodium bromide and caustic soda liquid NaOH prepared in S1 to obtain a premix; s3, electrochemical in-situ bromination reaction: introducing the premix into a micro-channel reactor provided with an electrolysis electrode, and applying current to the premix to obtain a dibromohydantoin initial solution; and S4, crystallizing, separating and drying the product, carrying out cooling crystallization through a three-stage stepped cooling method to obtain a dibromohydantoin crystal, carrying out centrifugal separation to obtain a dibromohydantoin wet product, and then drying to obtain a dibromohydantoin finished product. The method can improve the generation stability and the product quality of the dibromohydantoin.

The application provides a composite iron phosphate and a preparation method and application thereof, and the preparation method comprises the following steps: (1) mixing nanocellulose, glacial acetic acid, acetic anhydride, perchloric acid and an organic solvent to obtain acetylated nanocellulose through reaction; (2) mixing nanocellulose, TEMPO and sodium bromide with water, adding sodium hypochlorite solution to obtain oxidized nanocellulose through reaction; (3) mixing the oxidized nanocellulose and the acetylated nanocellulose with an acidic aqueous solution, then mixing with an oily solvent to obtain a water-in-oil emulsion; (4) mixing an iron source, a phosphorus source and the water-in-oil emulsion, and then obtaining the composite iron phosphate through sintering treatment after reaction. The application utilizes the different hydrophilic / hydrophobic difference of acetylated and oxidized nanocellulose to induce the generation of a spherical shell-shaped iron phosphate filled with rod-shaped structures, the nanocellulose forms carbon in situ after high-temperature calcination, and the uniform distribution of the carbon layer is realized, and the conductivity is further improved.

The invention discloses a gradient digestion, extraction and detection method for microplastics in plant tissues, and belongs to the technical field of plant pollutant detection. The core of the method is that a hydrogen peroxide-based primary digestion solution, a cellulase and pectinase compounded tissue digestion solution and a residual digestion solution composed of a Fenton reagent and sodium bromide are sequentially adopted to perform three-stage digestion on a plant sample under a mild acidic condition so as to thoroughly remove organic matters and completely retain micro-plastics. After digestion, micro-plastics are extracted through filtration, ultrasonic enrichment and concentration, and finally accurate qualitation and quantification are carried out through thermal cracking-gas chromatography / mass spectrometry. The invention synchronously protects the special digestion solution composition and the kit for realizing the method. According to the scheme, the contradiction between incomplete removal of organic matters and damage of a micro-plastic structure in a traditional digestion technology is effectively solved, the unification of efficient impurity removal (gt, 90%) and high recovery rate (greater than or equal to 85%) is realized, and the accuracy and reliability of detection are remarkably improved.

The utility model discloses a kind of sodium bromide solution decoloring filter devices, belong to sodium bromide solution production technical field, its technical key points include preparation assembly, jacking assembly, filtering assembly, lifting assembly and deflection component.The utility model, when preparing sodium bromide solution, under normal circumstances, can directly inject solution into funnel, and input activated carbon powder, to complete the decoloring treatment of solution, solution can then be filtered by filtering assembly below funnel, to complete preparation, and in special circumstances, when there is precipitate in solution, decoloring treatment can be carried out only after filtering precipitate, filtering assembly can be moved to the upper side of preparation barrel by moving deflection component and lifting assembly at this time, so that the precipitate can be filtered by filtering assembly, and the above operation is repeated, i.e., the preparation of sodium bromide solution can be completed.

The reaction of sodium hypochlorite with sodium bromide is slow, and commonly only part of the bromide is converted to hypobromite. Methods to accelerate the reaction by adding a regulated amount of acid to a solution comprising bleach and bromide are provided, whereby the yield of hypobromite can be increased. The amount of acid added can be predetermined based on the content of a base in the bleach, and acid can be added to neutralize the base. The amount of acid added can be based on a measured parameter of the reaction that is indicative of reaction kinetics. For example, the amount of acid can be actively controlled by measuring pH, absorbance of visible or near Ultraviolet light, or temperature of the reacting solution and adjusting acid.

The invention discloses a method for preparing a nanoscale cellulose material from soybean shells, and relates to the technical field of nano modification. The method comprises the following steps: crushing degreased and impurity-removed soybean shells, and extracting with a 70-90wt% ethanol aqueous solution at 60 + / -5 DEG C for 2-4 hours to obtain a mixed solution; stirring with 2-6wt% of sodium hydroxide or potassium carbonate solution at the speed of 60-80rpm and the temperature of 80-95 DEG C for 1-4 hours to obtain coarse cellulose slurry; treating with a 1-3wt% sodium hypochlorite solution at the temperature of 60-80 DEG C for 0.5-2 hours to obtain a treatment solution; the preparation method comprises the following steps: preparing a slurry, drying at a low temperature of 30-40 DEG C for 12-24 hours, re-suspending until the slurry is 5-10 wt%, adding 0.1-0.3 time of TEMPO, 0.2-0.4 time of sodium bromide and 0.05-0.1 time of 2-4 wt% amino trimethylene phosphonic acid, reacting for 2-6 hours at a pH value of 9-11 and a temperature of 60-80 DEG C, performing ultrasonic-assisted treatment, centrifuging, and homogenizing to obtain modified cellulose; and performing membrane dialysis and freeze-drying to obtain powder. The method is low in raw material cost and green in process, the nano cellulose with the diameter of 20-50 nm, the high crystallinity of 60-80% and the thermal stability of 300-350 DEG C is obtained, and the method is suitable for the fields of composite material reinforcement and the like.

The invention relates to a preparation method of a nano silver halide emulsion, which comprises the following steps: S1, fully dissolving deionized water, sodium bromide, a nucleating aid, a stabilizer and gelatin in a container with disc type stirring, and uniformly mixing to prepare a primary glue solution; uniformly mixing silver nitrate with deionized water to prepare a silver nitrate solution; uniformly mixing sodium bromide, potassium iodide and deionized water to prepare a halogen solution; s2, at a certain temperature, injecting a prepared silver nitrate solution and a halogen solution into the primary glue solution at the same time to obtain a mother solution containing nano silver halide; and S3, desalting the mother liquor containing the nano silver halide, supplementing glue, and sensitizing to obtain the nano silver halide emulsion. The nucleating aid and the stabilizer are added into the gelatin aqueous solution, the prepared nano silver halide particles are uniform, stable in storage and free of aggregation, and the emulsion can be desalted at normal temperature, is low in energy consumption and high in production efficiency, and is beneficial to continuous production.

This invention relates to the field of terephthalic acid oxidation residue treatment technology, specifically a method for treating terephthalic acid oxidation residue. A method for treating terephthalic acid oxidation residue includes the following steps: S1. Pretreatment; S2. Separation; S3. Evaporation and concentration; S4. Incineration; S5. Ash dissolution; S6. Filtration; S7. Recovery of sodium carbonate and sodium bromide; S8. Recovery of cobalt-manganese catalyst; S9. Solid waste treatment; S10. Recycling of cobalt-manganese catalyst; S11. Recovery and reuse of sodium carbonate. This application achieves the recovery of sodium carbonate, sodium bromide, and cobalt-manganese compounds from the residue, as well as the recycling of sodium carbonate and cobalt-manganese compounds. The evaporation condensate is recycled during the treatment process, resulting in no waste discharge. The process is water-saving, energy-saving, and environmentally friendly.

The invention relates to the technical field of preparation of tert-butyl carbamate, in particular to a preparation method of (R)-(1-([1, 1 '-biphenyl]-4-yl)-3-oxopropane-2-yl) tert-butyl carbamate. Comprising the following steps: S1, taking a four-mouth bottle, adding 1780 g of dichloromethane, 165 g of (R)-tert-butyl (1-([1, 1 '-biphenyl]-4-yl)-3-hydroxypropane-2-yl) carbamate, 1.6 g of TEMPO and 2 g of tetrabutylammonium bromide into the four-mouth bottle, and stirring the four-mouth bottle, the dichloromethane, the (R)-tert-butyl (1-([1, 1'-biphenyl]-4-yl)-3-hydroxypropane-2-yl) carbamate, the TEMPO and the tetrabutylammonium bromide; s2, 33.5 g of a sodium bromide solution and 146 g of clear water of a phosphoric acid mixed salt solution are added into the four-opening bottle after stirring in the step S1, and liquid in the four-opening bottle is cooled to a specified temperature; s3, sodium hypochlorite with the available chlorine content being 9-10% is dropwise added into the four-opening bottle cooled in the S2; and S4, after dripping in the step S3 is completed, preserving the heat of the liquid in the four-mouth bottle, and adding 385 g of a sodium thiosulfate solution into the bottle for quenching reaction. And S5, sampling and detecting. The pH value buffering agent of a phosphate system, namely a sodium dihydrogen phosphate-disodium hydrogen phosphate composite salt system, is used, and the yield is 90-96%.

The invention provides a method for synchronously extracting and quantifying micro-plastics and tire abrasives in sludge and application of the method, and belongs to the technical field of residual sludge pollution monitoring. The method comprises the following steps: firstly, freeze-drying and grinding the excess sludge, pre-oxidizing by using a hydrogen peroxide solution to destroy aggregates formed among MPs and TWP, clay, sand and other substances, and then heating to remove the hydrogen peroxide solution; and the residual hydrogen peroxide solution in the pre-oxidation process is prevented from being continuously decomposed in the subsequent density separation process to generate bubbles for jacking impurities to float upwards. A saturated sodium bromide solution and a saturated sodium iodide solution are adopted as flotation reagents for primary density separation and secondary density separation correspondingly, it is guaranteed that MPs and TWP with different densities are separated, impurities are removed through Fenton oxidation digestion, and interference on recognition of specific thermal cracking products of MPs and TWP is reduced. The method provided by the invention can quickly and accurately evaluate the mass concentration pollution status of MPs and TWP in the excess sludge.

The invention discloses a hydrogen-bond-rich bionic artificial alpha-amino-acid-based anthraquinone derivative and a preparation method and application thereof in an aqueous flow battery, and relates to the technical field of electrochemical energy storage. 1, 5-DHAQ and a methanol solution are added into a flask, KOH is added, NaS2O4 is added into the mixture in an ice-water bath, a formaldehyde solution is added after color change, an H2O2 aqueous solution is added after 12 h, hydrochloric acid is used for acidification, and the hydrogen-bond-rich bionic artificial alpha-amino-acid-based anthraquinone derivative is obtained. Washing and drying the precipitate; the preparation method comprises the following steps: adding 2, 4, 6-trichlorotriazine into DMF (Dimethyl Formamide), stirring to generate a white solid, adding dichloromethane and sodium bromide, stirring, adding 1, 5-dihydroxy-2, 6-bis (hydroxymethyl) anthracene-9, 10-diketone, washing with a Na2CO3 solution, washing with HCl, drying, adding 2, 6-bis (bromomethyl)-1, 5-dihydroxyanthracene-9, 10-diketone and cysteine into KOH, stirring at 60 DEG C overnight, and pickling to obtain Cys-DHAQ.

The application discloses a process method for preparing high-quality sodium bromide from bromine-containing brine without chlorine, and belongs to the technical field of chemical production. The process method uses ozone as an oxidant to oxidize bromine-containing brine, and simultaneously uses a gaseous membrane method to prepare sodium bromide. The process method is green, safe and efficient, and can greatly improve the safety of the production process without using chlorine as an oxidant. The bromine extraction mother liquor is environmentally friendly and does not contain residual chlorine. The obtained industrial sodium bromide product does not contain chlorine ions, the main content of sodium bromide is greater than 99%, and the quality is better than the indexes specified in the industry standard HG / T 3809-2006.

The present invention provides a hydroxyethyl disulfide, a preparation method and an application thereof, belonging to the technical field of organic synthesis. That is, a method for directly synthesizing hydroxyethyl disulfide by electrocatalysis. The hydroxyethyl disulfide derivative is synthesized from readily available basic raw materials such as substituted ethylene oxide and sodium bromide. Compared with the traditional method for constructing asymmetric disulfides, the raw materials of this method are safe and non-toxic, use electricity as the energy source, have green, mild and efficient reaction conditions, and use benzyl acetyl disulfide as the sulfur source, avoiding the stench of traditional sulfides and providing a new way for the synthesis of asymmetric disulfides. The hydroxyethyl disulfide prepared by the present invention has certain anti-cancer cell proliferation activity, and has a good yield in gram-scale reactions, and has potential application prospects in industrial production.

The present invention relates to the technical field of foaming agents, and discloses a foaming agent and its preparation method and application. The present invention reacts polyethylene glycol and 4,4'-N-benzylaniline dicarboxylic acid, and then reacts with 2-bromoethyl sodium sulfonate to obtain a foaming agent. The foaming agent of the present invention uses the polyether segment of polyethylene glycol as the main chain, and a large number of sulfonate groups are introduced into the side chain, showing a strong surface activity performance. At different mass concentrations, it has a very high foam volume and half-life, and the foaming performance is very good. And in oil field well water with different mineralization degrees, the foam volume and half-life are also very high, the salt resistance is excellent, and the high temperature resistance is good.

The invention relates to the technical field of crystallization, in particular to a sodium bromide production device and method. The sodium bromide production device comprises a base, and the upper end face of the base is fixedly connected with a shell; the crystallization mechanism comprises a crystallization box fixedly connected to the upper half part in the shell, a cross-shaped partition plate is fixedly connected to the interior of the crystallization box, and the interior of the crystallization box is divided into a plurality of crystallization areas with the same volume by the cross-shaped partition plate; a vibration guide assembly, two resonance assemblies and a liquid level detector are arranged in each crystallization area, and the upper end face of the crystallization box is connected with a turning cover through a hinge; through a cross-shaped partition plate, a vibration guide assembly and a resonance assembly in the crystallization mechanism, sodium bromide to be crystallized in the crystallization box can be subjected to partition crystallization and uniform crystallization, and the vibration guide assembly can transmit vibration waves to a detector to master the crystallization condition, so that the crystallization uniformity and quality of the sodium bromide can be improved, and the crystallization efficiency is improved. And the uniformity and efficiency of the crystallization process are effectively improved.

Adding acid to a solution containing bleach and soluble bromide salt accelerates the reaction producing sodium hypobromite which has a pronounced yellow color. The amount of acid needed to provide complete reaction can be controlled by measuring light absorbed by the solution. Add acid until Absorbance stops increasing, indicating complete conversion of NaBr to NaOBr. The amount of acid added can also be controlled by measuring pH before and after adding NaBr to diluted bleach. When enough acid has been added to fully neutralize sodium hydroxide in the bleach and provide nearly 100% conversion, the difference between the two pH values becomes positive and continuous to increase, whereby acid feed can be controlled to make pH change equal to or greater than a predetermined positive value.

The invention relates to a strong coordination type electrolyte with simple components, and belongs to the technical field of zinc-iodine battery electrolyte additives, and the electrolyte only contains zinc sulfate, an additive and water; the additive comprises any one of tetramethyl guanidine hydrochloride, betaine hydrochloride, sodium bromide, trimethyl ammonium bromide and trimethyl sulfoxide bromide. According to the electrolyte, hydrolysis failure of the electrolyte is inhibited by means of a strong coordination mode and efficient complexing I < + >, only a low-concentration single additive component is needed, and the electrolyte also keeps the advantage of high ionic conductivity of a water-based electrolyte and can accelerate substance transmission in a thick electrode, so that relatively high coulombic efficiency and cycling stability are realized under high iodine surface loading capacity; the invention also provides an ampere-hour level four-electron zinc-iodine soft package battery with high surface capacity, which can break through the performance bottleneck of the existing zinc-iodine battery in the aspect of practical application.

The invention belongs to the technical field of terahertz (THz) wave absorbing materials, and particularly provides a transparent flexible terahertz absorbing material based on ionic conduction loss and a preparation method thereof, which are used for meeting electromagnetic interference suppression requirements in high-transmittance scenes such as aviation optical windows, radomes and sensors. The transparent flexible terahertz absorbing material is composed of an upper anti-reflection layer, a lower anti-reflection layer and polymer-based hydrogel sealed between the upper anti-reflection layer and the lower anti-reflection layer, and the polymer-based hydrogel takes polyacrylamide (PAM) as a framework and water as a filling medium; the filling medium contains salt ions, and the salt ions are one or more of lithium chloride, sodium chloride, potassium chloride, cesium chloride, sodium fluoride, sodium bromide and sodium iodide; the transparent flexible terahertz absorber has the advantages of high wave absorbing performance, excellent flexibility and high transparency.

The invention discloses a preparation method of p-bromoanisole, and relates to the technical field of preparation of p-bromoanisole, and the preparation method comprises the following steps: S1, preparing anisole; s2, preparing a sodium bromide solution; s3, material preparation: extracting anisole in S1, and performing synthesis preparation on the sodium bromide solution, hydrochloric acid and hydrogen peroxide in S2; 4, material synthesis: anisole, the sodium bromide solution and hydrochloric acid in the step 3 are put into a reaction kettle, hydrogen peroxide is dropwise added after cooling, standing is performed after the reaction is finished, liquid separation is performed, and a lower-layer crude product is obtained after liquid separation; s5, distillation: putting the crude product in S4 into a reaction kettle for separation and distillation to obtain the product p-bromoanisole. According to the method, the anisole, the sodium bromide solution and the hydrochloric acid are put into the reaction kettle, the hydrogen peroxide is dropwise added after cooling, the high-content and high-yield p-bromoanisole product is obtained after preparation, the waste rate of raw materials consumed for preparation is low, the obtained p-bromoanisole is high in quality, the operation process is simple, and the environmental protection performance is high.