50 results about "Sodium bromide" patented technology

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.

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 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 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.

This invention provides a method for preparing tetrabutylphosphine acetate and simultaneously producing sodium bromide, belonging to the field of organophosphine salt preparation and electrodialysis separation technology. The method provided by this invention uses sodium acetate and tetrabutylphosphine bromide as raw materials, and prepares tetrabutylphosphine acetate and simultaneously produces sodium bromide via displacement electrodialysis. This achieves efficient ion exchange between tetrabutylphosphine bromide and sodium acetate, and simultaneous recovery of sodium bromide. The preparation method is simple, avoids the use of large amounts of chemical reagents, and reduces environmental pollution.

This invention belongs to the field of catalysis technology, specifically relating to a method for preparing cyclopentane derivatives from furan compounds. The method includes the following steps: mixing a furan compound, a copper-based catalyst, a halogen modifier, and a first solvent, and reacting them under a hydrogen atmosphere; the halogen modifier is at least one selected from sodium chloride, sodium bromide, potassium chloride, potassium bromide, chlorobenzene, and bromobenzene. This invention, by adding a halogen modifier to the catalytic system, introduces halogen components onto the surface of the copper-based catalyst to construct Cu-halogen active centers, achieving highly selective rearrangement of furan compounds into cyclopentane derivatives under relatively mild conditions, while significantly suppressing condensation side reactions, improving carbon utilization efficiency, and reducing dependence on the type of support.

The invention belongs to the technical field of sewage treatment, and particularly relates to a medical sewage treatment method for synergistically removing new pollutants and pathogenic microorganisms, which comprises the following steps: S1, pretreatment: putting an inorganic flocculant into medical sewage to promote the aggregation and precipitation of suspended particles and colloids in the medical sewage; s2, oxidation treatment: a composite agent is put into the pretreated medical sewage, a direct-current electric field is applied at the same time, the composite agent comprises potassium monopersulfate composite salt, sulfamic acid, sodium chloride, sodium bromide, a surfactant, a pH buffer agent, a composite corrosion inhibitor, an anti-blocking agent and anhydrous sodium sulfate, strong-oxidizing components are generated after the composite agent is dissolved, and the strong-oxidizing components are added into the pretreated medical sewage; organic matters are mineralized and decomposed, and pathogens are killed; s3, biochemical treatment: carrying out biochemical treatment on the medical sewage subjected to oxidation treatment to remove ammonia nitrogen and small molecular organic matters. According to the invention, various new pollutants can be effectively decomposed, pathogenic microorganisms are inactivated, and the treatment effect is improved.

The application discloses a graphene dispersion liquid and a preparation method and application thereof, and belongs to the technical field of PCBs.The graphene dispersion liquid provided by the application comprises modified graphene and a dispersing agent; the pH of the graphene dispersion liquid is 2-6; the modified graphene is TSiPD modified graphene; and the dispersing agent is a mixed aqueous solution of sodium bromide and sodium hypochlorite.The graphene dispersion liquid provided by the application can be used for hole metallization of PCBs, and can significantly improve the uniformity of the conductivity in the holes and the adhesion strength between the graphene and the hole walls.The application further provides a preparation method and application of the graphene dispersion liquid.

This invention discloses a high-efficiency sodium bromide recovery process for PTA wastewater, belonging to the technical field of wastewater treatment and bromine resource recovery and utilization in the production of purified terephthalic acid. The process includes the following steps: Pretreatment softening: A stream of bromine-containing wastewater generated during the production of purified terephthalic acid is provided. The bromine-containing wastewater is introduced into a chelating resin unit at a volume hourly space velocity (VHSV) to remove calcium and magnesium ions from the bromine-containing wastewater, resulting in softened water. Through a re-filtration enhanced salt separation step, the physical washing effect of the dialysis water is utilized to effectively wash the retained bromide ions into the product water side, overcoming the Donnan effect at high concentrations. Through an acidification and decarbonation step, the wastewater is transformed from a complex ternary system of carbonates, bromides, and sulfates into a simple binary system of sulfates and bromides, eliminating the interference of carbonate ions on the membrane system.

The application is suitable for the technical field of inorganic substance preparation method, and provides a preparation method of bromine, which comprises the following steps: step one: a certain amount of sodium bromide and hydrobromic acid are added into a mother liquor pool and stirred to obtain a mother liquor; step two: a predetermined amount of stearic acid and polyvinylpyrrolidone are added; step three: preheating is carried out, and then the preheating is fed into an absorption tower; step four: the liquid at the bottom of the absorption tower flows into the upper part of a bromine evaporation tower, and is heated by steam in the bromine evaporation tower; water vapor and chlorine gas are introduced from the bottom of the bromine evaporation tower, and bromine steam enters the absorption tower; step five: the distillation acid liquid generated by the bromine evaporation tower flows into a preheater to be preheated; bromine steam flows out from the upper part of the bromine evaporation tower to obtain a bromine and water mixture; step six: the bromine and water mixture flows into a bromine water separation bottle to be separated, and bromine products are obtained, thereby, the bromine source is hydrogen bromide and sodium bromide; the stearic acid can effectively reduce the surface tension, so that the reaction is more uniform, and the system is stable.

This invention discloses a sodium bromide feeding system and method for ton bags, relating to the field of bromine production technology. The system and method include a sodium bromide silo equipped with an electric hoist and a screw conveyor assembly fixedly connected to its lower end. It also includes a fixed feed cylinder located inside the sodium bromide silo near its lower end to limit the size of the ton bag's outlet and reduce dust generation. This invention uses multiple cutting blades forming a conical structure at the upper end of the fixed feed cylinder to cut open the bottom of the ton bag, creating an outlet. The cutting blades continue until all the blades are inside the ton bag. At this point, the fixed feed cylinder is positioned at the outlet, fixing the outlet size and allowing the sodium bromide to fall evenly, reducing dust generation. Simultaneously, the first and second cutting blades reciprocate to chop and break up any clumps of deliquescent sodium bromide and disrupt the arched support structure formed by the sodium bromide, reducing bridging and blockage.

The utility model relates to the technical field of gas field water treatment and bromine extraction devices, and particularly discloses a gas field water bromine extraction device which comprises an electrooxidation unit, a bromine storage tank, a blow-off tower, a chlorine washing tower, an absorption unit with an injection port, an evaporation centrifugal unit and a demisting tower connected with the absorption unit and the blow-off tower respectively, the electrooxidation unit is externally connected with a raw water tank; the demisting tower and the electrooxidation unit are respectively connected with the raw water tank. According to the device disclosed by the utility model, chlorine oxidation is replaced by electrooxidation, so that a hazardous chemical substance C l2 is prevented from being used in the oxidation process, and meanwhile, the product can be a derivative such as sodium bromide.

This invention relates to the field of compound synthesis technology, specifically disclosing a method for synthesizing 2-bromophenanthrene. The method includes the following steps: adding phenanthrene to a solvent, then adding sodium hydroxide and sodium bromide to the solvent, followed by dropwise addition of an aqueous solution of sodium hypobromite, stirring the reaction mixture to obtain the product 2-bromophenanthrene. The synthesis method provided by this invention is low-cost and has a high yield.

The invention provides a high-performance environment-friendly alcohol-based fuel. The fuel is prepared from, by weight, 80-90 parts of methanol, 2-8 parts of ethanol, 3-5 parts of tert-butanol, 0.01-0.08 part of sodium bromide, 1-2 parts of glycerin and 2-5 parts of xylene. The burning calorific value of the high-performance environment-friendly alcohol-based fuel can exceed 9000 Kcal / kg, which can meet the temperature requirement of boiler burners and large drying hearths. The fuel has a wide raw material source and a low price, and emits a small amount of harmful gas and causes little environmental pollution after burning, which achieves the purposes of energy saving and emission reduction.

The invention relates to the field of environmental protection, in particular to a Cu-doped BiOBr-based composite material and a preparation method thereof. The preparation method comprises the following steps: mixing polyvinylpyrrolidone with multi-walled carbon nanotubes, and adding deionized water to prepare a dispersion liquid A; adding sodium bromide and ascorbic acid into the dispersion liquid A to obtain dispersion liquid B; adding bismuth nitrate and copper nitrate into the dispersion liquid B, stirring, and carrying out hydrothermal reaction to obtain dispersion liquid C; performing centrifugal washing and vacuum freeze drying to prepare the multi-walled carbon nanotube / Cu doped BiOBr; adding deionized water, and performing ultrasonic treatment to obtain dispersion liquid D; coating the dispersion liquid D on the upper surface of a bamboo fiber membrane to prepare a composite membrane E; then coating the lower surface of the bamboo fiber membrane with a polyvinyl alcohol aqueous solution, laminating the surface with the upper surface of a blank bamboo fiber membrane with the same size, and drying to obtain the Cu-doped BiOBr composite material, which has potential application prospects in the fields of catalysis, wastewater treatment, environmental functional materials and the like.

The invention discloses a method for efficiently preparing oxidized starch, and belongs to the technical field of oxidized starch preparation, and the method comprises the following steps: preparing polyethylene glycol coated magnetic particles, adsorbing calcium, carrying out acylating chlorination, compounding, loading and carrying out oxidation reaction. The step of adsorbing calcium comprises the following steps: mixing polyethylene glycol coated magnetic particles, calcium chloride and absolute ethyl alcohol, stirring and centrifuging at normal temperature, and taking precipitates as the magnetic particles after adsorbing calcium; the loading comprises the following steps: mixing the composite oxidized starch with deionized water, stirring at 80-85 DEG C, cooling to room temperature, adding the calcium-adsorbed magnetic particles, stirring, adding sodium bromide, stirring, centrifuging, taking precipitate, washing and drying to obtain the loaded TEMPO. According to the method, the yield of the prepared oxidized starch can be improved while the oxidized starch is efficiently prepared, and the problem that TEMPO is difficult to recycle during preparation can be solved.

The invention discloses a small-size ruthenium dioxide nano material and a preparation method and application thereof, and particularly relates to the technical field of electro-catalytic materials.The preparation method comprises the following steps that a titanium sheet is placed in an oxalic acid solution to be etched, cleaned and dried to serve as a substrate; the preparation method comprises the following steps: adding sodium bromide as a size regulating agent into a ruthenium dioxide precursor solution, and mixing, drying and calcining to obtain the ruthenium dioxide nanocrystal of which the particle size is obviously reduced. The preparation process of the material is simple, the used sodium bromide is low in price, and the method does not need complex equipment or post-treatment steps; the prepared catalyst has a higher specific surface area and more active sites, shows excellent catalytic activity and stability in an acidic electro-catalytic oxygen evolution reaction, and has a great application prospect.

The invention provides a green and efficient preparation method of an anthelmintic albendazole sulfoxide, which is characterized in that water is used as a green oxygen source, an anodic oxidation reaction is driven by electric energy at room temperature, albendazole sulfoxide is synthesized with high selectivity, and sulfone by-products generated by excessive oxidation are effectively avoided. According to the method, albendazole, cheap electrolyte sodium bromide, dimethyl sulfoxide and water are mixed into homogeneous reaction liquid, inert gas protection is not needed, and the homogeneous reaction liquid is introduced into an electrochemical microchannel continuous reactor to achieve oxidation. Compared with a traditional hydrogen peroxide oxidation method and a low-temperature chemical oxidation method, the method does not need to use a stoichiometric oxidizing agent, is mild in reaction condition, effectively avoids related safety and environmental risks, meets the requirements of green and sustainable development, and has a good industrial application prospect.

A method for producing and purifying sodium bromide using the coke from waste circuit boards pyrolysis residues as reducing agent, belonging to the field of purifying sodium bromide and high-value utilization, and more particularly, relating to a method for reducing and purifying crude bromine salt obtained from waste circuit boards smelting ash by using the coke in waste circuit boards pyrolysis residues. The main steps are as follows: carbonization conversion, water dissolution, filtration, and concentrated crystallization under vacuum heating. The pure sodium bromide was obtained by reducing crude bromine salt enriched from waste circuit board smelting ash by using the coke in waste circuit boards pyrolysis residues, realizing the resource coupling and high-value utilization of the two wastes, avoiding the secondary pollution in the process of recycling the waste circuit boards. It has the characteristics of simple operation, high resource utilization rate and no tail liquid discharge.

The invention discloses a method for extracting and converting bromine ions dissolved in a water body and detecting stable bromine isotopes, and belongs to the field of isotope detection methods. The method comprises the following steps: oxidizing bromide ions in a water body by using acidic sodium dichromate based on the oxidation-reduction characteristic of the bromide ions in the water body to obtain bromine gas, reacting the bromine gas with an alkaline solution to obtain sodium bromide, adding silver ions into the solution to generate silver bromide precipitates, drying the precipitates, quantitatively putting the precipitates into a jaw headspace bottle in a dark environment, and adding methyl iodide; reacting under optimized conditions to generate methyl bromide gas; a gas isotope mass spectrometer and a gas chromatograph which are provided with receiving cups with the mass numbers of 94 and 96 are used in a combined mode, interference of impurity gas is eliminated through modified Isolink II equipment, after bromomethane mixed gas is separated through a chromatographic column, the impurity gas is emptied, bromomethane enters the mass spectrometer, and the bromine isotope ratio is accurately measured. The method can be used for evaluating and researching sources, causes and formation hydrogeochemical and physical processes of oil field water, underground brine, salt water and the like.

The application provides a purification method of a chromium-containing mixed salt, the mixed salt comprising sodium carbonate, sodium bromide and a heavy metal chromium compound, in the method, a high-purity sodium bromide aqueous solution is prepared from the mixed salt and chromium salt is recovered, and the method comprises the following steps: preparing a crude sodium bromide solution, preparing a chromium removal agent by using a barium compound or a calcium compound, removing chromium from the crude sodium bromide solution by using the chromium removal agent and collecting a filtrate A; and treating the filtrate A to obtain a high-purity sodium bromide aqueous solution. In the method, the sodium carbonate in the crude sodium bromide solution is all converted into sodium bromide; by using the method, the chromium in the sodium bromide is removed and converted into barium chromate or calcium chromate products; the obtained sodium bromide no longer contains the heavy metal chromium and can be directly used for preparing high-purity sodium bromide or preparing a sodium bromide aqueous solution.

The application discloses a preparation method of pyraclostrobin and belongs to the technical field of pesticide synthesis. In order to solve the problems of low bromine atom utilization rate and generation of more low-concentration acid-containing wastewater in the production process of pyraclostrobin, the method is provided, which uses sodium bromide as a bromine source, controls the rate of the conversion of the sodium bromide aqueous solution into bromine and sodium chloride, and then realizes bromination in situ. After the reaction is completed, a series of post-treatments are performed to obtain o-nitrobenzyl bromide. Then, etherification and purification treatments are performed to obtain pyrazole benzyl ether (an important intermediate). Finally, reduction, acylation and methylation are performed by using mature technology, and pyraclostrobin is obtained. The sodium bromide can be directly purchased or recycled by simple recovery treatment of the waste liquid formed by the process and directly reused in the process. The method not only provides a new synthesis route for the preparation of pyraclostrobin, but also reduces the raw material cost and improves the bromine atom utilization rate under the premise of realizing the preparation of pyraclostrobin.

This application belongs to the field of wastewater energy and resource utilization technology, and particularly relates to a high-efficiency PTA wastewater treatment system. The system has a single-layer sleeve in the first-stage evaporator and double-layer sleeves in the second and third-stage evaporators. The concentrated liquid is then sent to an incinerator. The high-temperature flue gas generated by combustion, after dust removal, is sent to the outside of the single-layer sleeve of the first-stage evaporator. The single-layer sleeve contains PTA wastewater. The space between the double-layer sleeves in the second and third-stage evaporators contains PTA wastewater concentrated in the previous stage evaporator. High-temperature flue gas from the previous stage evaporator flows outside the double-layer sleeves, while steam generated in the previous stage evaporator flows in the innermost layer of the double-layer sleeves. The ash from combustion is sent to a dissolving tank for dissolution. The filtered filtrate is sent to a first-stage crystallizer for evaporation and crystallization, where sodium carbonate crystals are precipitated and recovered. The remaining mother liquor is sent to a second-stage crystallizer for cooling and crystallization, where sodium bromide crystals are precipitated and recovered. The remaining mother liquor is returned to the first-stage crystallizer. This application achieves energy and resource utilization of wastewater with high efficiency.

The present application relates to the field of food processing and packaging technology, and more particularly to a deoxidizer, and more particularly to an iron-based deoxidizer capable of deoxidation, dehumidification and drying, and a preparation method and application thereof. The present application provides an iron-based deoxidizer, a preparation method and application thereof. The preparation raw materials of the iron-based deoxidizer include 60-80 wt.% of iron powder, 3-30 wt.% of anhydrous sodium sulfate, 0.2-10.0 wt.% of sodium bromide, 0.1-3.0 wt.% of activated carbon and 1.0-5.0 wt.% of glycerol aqueous solution. The iron-based deoxidizer can not only effectively remove oxygen but also dehumidify and dry the external environment, which is conducive to its popularization and application in the field of food or medicine (such as nuts, roasted seeds and nuts and puffed food and medicine) that needs to be dried.

The invention discloses a preparation method of bromodiphenylmethane, and belongs to the technical field of organic synthesis.The preparation method comprises the steps that methylbenzene, hydrobromic acid and benzhydrol are mixed, then sodium bromide is added, then heating reflux reaction, standing liquid separation and refined petroleum ether treatment are conducted, cooling crystallization is conducted, and bromodiphenylmethane is obtained. The invention provides a preparation method of diphenylbromomethane, which is stable in process, safe to operate, environment-friendly and economical in cost. The method successfully solves the common problems of poor atom economy, low reaction selectivity, complicated post-treatment, difficulty in product purification and the like in the traditional bromination process by optimizing the raw material ratio and synergistic effect, accurately controlling the reaction process and adopting an original efficient purification process. The whole process from reaction to purification is optimized, and the method is particularly suitable for industrial production and has remarkable comprehensive benefits.

The application provides a preparation method of 1-bromoethyl acetate and belongs to the technical field of organic synthesis. In the application, ethylene acetate and sodium bromide are used as raw materials, and the reaction is carried out at a certain temperature in the presence of an oxidant and a catalyst. After the reaction is completed, the 1-bromoethyl acetate is obtained through post-treatment. In the application, sodium bromide is used as a bromine source, which is widely available and low in price. Meanwhile, the use of corrosive Lewis acid catalyst is avoided, which meets the development direction of green chemistry. The reaction of the application can be smoothly carried out at normal temperature and pressure, and is suitable for industrial amplification production. The application provides a preparation method of 1-bromoethyl acetate, which is simple in operation, mild in reaction condition, good in selectivity, high in yield, low in three wastes and low in cost.