42 results about "Bromate salt" patented technology

The invention provides Chryseobacterium P6 for degrading unsymmetrical dimethylhydrazine and a degradation method of the Chryseobacterium P6, the strain is obtained by separating from activated sludge which is domesticated by the unsymmetrical dimethylhydrazine for a long time, and the strain is identified as Bacteroidetes door and Chryseobacterium by 16SrDNA (Deoxyribose Nucleic Acid) gene sequence analysis. After being amplified and cultured for 12 hours by an LB culture medium, the strain can show remarkable degradation activity on unsymmetrical dimethylhydrazine under the conditions that the pH is 7.0 and the temperature is 32 DEG C, and the degradation rate within 48 hours can reach 95% or above. The method is suitable for in-situ remediation of industrial wastewater, polluted soil and waste without additionally adjusting the pH value or adding an oxidizing agent; rapid propagation of the strain can be realized by using a conventional culture medium (such as an LB culture medium), complex equipment or energy input is not needed in the degradation process, and the unit treatment cost is reduced by more than 60% compared with that of a chemical oxidation method; no heavy metal catalyst, high-concentration oxidant or adsorbent is used in the whole process, and secondary pollution risks of bromate, regenerated waste liquid and the like are completely eradicated.

The invention discloses a method for synchronously removing bromate and new pollutants in water by using a far ultraviolet light / bromate process. The method comprises the following steps: radiating a water body containing the bromate and the new pollutants by using far ultraviolet light; the bromate can be efficiently degraded by utilizing an far ultraviolet light source with a high molar absorption coefficient, so that new pollutants can be further degraded by generated oxidizing free radicals and reducing species, and the bromate and the new pollutants can be synchronously and efficiently removed. Under the condition of 800 mJ cm <-2 >, the degradation rate of bromate can reach 54%; under the condition of 200 mJ cm <-2 >, the removal rate of new pollutants can reach 90% or above; according to the method, collaborative purification of the two pollutants is achieved, compared with removal of new pollutants by independently using far ultraviolet light, the far ultraviolet light / bromate technology is higher in new pollutant removal efficiency, and the method has the advantages of being efficient, environmentally friendly and free of chemicals; according to the method, the bromate-containing water body generated after ozone or ultraviolet / chlorine disinfection of a water plant can be utilized in situ, so that the water treatment cost can be saved.

The invention discloses a preparation method of 2-bromo-1, 1, 1, 3, 3, 3-hexafluoropropane, and belongs to the technical field of synthesis of fluorine-containing intermediates. According to the preparation method, perfluoro-2-methyl-2-pentene and hypobromite are used as raw materials, 2-bromo-1, 1, 1, 3, 3, 3-hexafluoropropane is prepared under the action of an aprotic polar solvent under the low-temperature condition, the preparation method is low in cost and easy to obtain, the steps are simple and convenient, the reaction conditions are mild and rapid, and the method is suitable for industrial production. And a stable and reliable intermediate source is provided for downstream fields of fluorine-containing medicines, electronic chemicals and the like.

The invention discloses adding equipment for bromate electrolyte, and particularly relates to the field of electrolysis equipment.The adding equipment comprises a base, a driving mechanism and a gantry mounting frame are fixedly mounted at the upper end of the base, and the gantry mounting frame is located at the right end of the driving mechanism; a mounting plate is fixedly mounted at the right end of the driving mechanism, the right end of the mounting plate penetrates through the gantry mounting frame and extends to the right side of the gantry mounting frame, and an electrolyte storage box is fixedly mounted on the lower end face of the mounting plate and located on the right side of the gantry mounting frame; the middle position of the lower end of the electrolyte storage box is fixedly provided with and communicates with a liquid outlet pipe, and the liquid outlet pipe is fixedly provided with a switch valve. The problem that it is difficult for electrolyte adding equipment to be added into electrolytic cells of different specifications and sizes is solved, the automatic cleaning function is achieved, and more convenience is achieved.

The application provides a preparation method of low-impurity vonerogefumate. The application provides a method for removing impurities A-E in the preparation of vonerogefumate, wherein vonerogefumate is reacted with hydrobromic acid to obtain vonerogefumate hydrobromide, and the method specifically comprises the following steps: (1) dissolving vonerogefumate and hydrobromic acid in a solvent; (2) cooling or directly precipitating a solid; and (3) separating to obtain vonerogefumate hydrobromide. The method can remove impurities A-E which are difficult to remove by a recrystallization refining method, and the method has good selectivity for impurities A-E. The application provides an impurity D, a preparation method thereof and application of the impurity D as an impurity control sample of vonerogefumate.

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 application discloses a kind of dual-wavelength ultraviolet light synergistic ozone micro-nano bubble treatment methyl orange wastewater method, belong to wastewater treatment technical field.The method is first to the micro-nano bubble generator is carried out organic solvent ultrasonic cleaning, deionized water flushing and drying pretreatment, then preparation ozone micro-nano bubble water, finally under the condition of stirring ozone micro-nano bubble water is mixed with methyl orange solution, through UV-222 and UV-254 dual-wavelength ultraviolet lamp irradiation realizes methyl orange degradation.The application combines the synergistic effect of ozone micro-nano bubble and dual-wavelength ultraviolet light, strengthens hydroxyl radical generation and organic matter photolysis, improves methyl orange decolorization and mineralization efficiency, can also photolyze debromination to avoid bromate byproduct, whole process does not need to add reagent, no sludge is generated, equipment system is simple and easy to control, applicable to the treatment of methyl orange azo dye wastewater, with good engineering application value.

The present invention relates to a process for the industrial-scale production of 5-{2-[benzyl-(1-(4-hydroxyphenyl)-1-methylethyl)amino]-1-hydroxyethyl}benzene-1,3-diol hemifumarate, a salt consisting of two molecules of 5-{2-[benzyl-(1-(4-hydroxyphenyl)-1-methylethyl)amino]-1-hydroxyethyl}benzene-1,3-diol and one molecule of fumaric acid, and having the following formula: 5-{2-[benzyl-(1-(4-hydroxyphenyl)-1-methylethyl)amino]-1-hydroxyethyl}benzene-1,3-diol hemifumarate is a useful intermediate in the synthesis of 5-[(1RS)-2-[(1RS)-2-(4-hydroxyphenyl)-1-methylethyl]-amino-1-hydroxyethyl]benzene-1,3-diol hydrobromide, which is used in the pharmaceutical field under the is known by the common name fenoterol hydrobromide.

The present invention provides 1,4-dimethylpiperazine and a preparation method thereof. The preparation method comprises the following steps: (1) reacting N-methyl ethylamine salt to obtain a reactant; (2) purifying the reactant to obtain the 1,4-dimethylpiperazine; the N-methyl ethylamine salt is 2-chloro-N-methyl ethylamine hydrochloride or 2-bromo-N-methyl ethylamine bromate; the process for preparing 1,4-dimethylpiperazine provided by the present invention has high reaction activity, high stability, high selectivity, simple reaction steps, mild reaction conditions, low requirements for reaction equipment, low potential safety hazards in production, and the purity of the 1,4-dimethylpiperazine prepared by the preparation method provided by the present invention can reach 99.5%.

The present invention relates to the field of thiabendazole preparation, specifically an improved thiabendazole preparation method. Comprise the following steps: S1 methylglyoxal is added to a container, the temperature is raised to 30-35 DEG C to melt, a catalyst is added, stirred evenly, air is blown in, and then o-phenylenediamine and acetic acid are added in batches, and the temperature is raised to 50-60 DEG C after adding, and the reaction is carried out for 2-5h to obtain a reaction solution containing 2-acetylbenzimidazole; S2 The reaction solution obtained in step S1 is added with liquid bromine, reacted, and after the reaction is completed, cooled, filtered, washed, and dried to obtain 2-dibromoacetylbenzimidazole hydrobromide; S3 The 2-dibromoacetylbenzimidazole hydrobromide obtained in step S2 is added to ethyl acetate, and then formamide and phosphorus pentasulfide are added for ring-closure reaction to obtain a closed-loop reaction liquid; S4 The thiabendazole in the closed-loop reaction liquid obtained in step 3 is purified to obtain a thiabendazole product. The process is simple, the prepared product has high purity, and the purity is 99.3%, and it is expected to be industrialized as soon as possible.

The application relates to a large-size rare earth doped phenethylamine lead bromide perovskite monocrystal preparation method and perovskite monocrystal, and solves the technical problems that the preparation of the existing large-size rare earth doped two-dimensional perovskite monocrystal needs higher nucleation supersaturation, the preparation period is long, and part of the rare earth bromide is extremely easy to absorb moisture, thereby reducing the crystal quality. The large-size rare earth doped phenethylamine lead bromide perovskite monocrystal preparation method and perovskite monocrystal comprise the following steps: 1) weighing; phenethylamine hydrobromide, lead bromide and rare earth metal bromide are weighed and placed in a glass bottle; 2) obtaining a precursor solution; 3) obtaining a millimeter-level size crystal; 4) screening a seed crystal; and 5) seed crystal growth. In step 4), the open container B is placed at a preset temperature until the seed crystal continues to grow into a rare earth doped phenethylamine lead bromide perovskite monocrystal with a predetermined size, and the size can reach a centimeter level, which has an important supporting role in promoting the performance research of the rare earth doped two-dimensional perovskite monocrystal.

A method for removing recalcitrant contaminants uses an oxygen-nanobubble advanced oxidation process. Oxygen-nanobubble based advanced oxidation mineralized 1,4 dioxane in an aqueous solution, thereby removing practically all of the 1,4 dioxane. An added advantage is that the process does not form bromate. Also disclosed is an ozone-oxygen nanobubble based advanced oxidation process that removes recalcitrant contaminants. Ozone-oxygen nanobubble based advanced oxidation significantly increased the mass transfer rate compared to that of the micro-bubble technology.

The invention discloses an ozone mixing water purification device, and relates to the technical field of ozone water purification, the ozone mixing water purification device comprises a ground and an ozone contact pool, the ozone contact pool is fixedly provided with an electrolysis box, the ground is provided with a placing pool, a gas injection assembly is arranged between the placing pool and the ozone contact pool, an electrolysis assembly is arranged in the electrolysis box, and the ozone contact pool is provided with a water inlet and a water outlet. And the gas injection assembly is used for electrolyzing generated bromate in the water body and comprises a servo motor fixedly mounted on the placement pool, and a rotating shaft is fixedly mounted at the driving end of the servo motor. The device has the advantages that through cooperation of the air supply assembly and the pulse mechanism, the purification effect on the water body can be improved, meanwhile, the concentration of bromate in the water body can be reduced, meanwhile, through cooperation of the detector and the electrolysis assembly, electrolysis treatment can be conducted on the water body when it is detected that the concentration of bromate in the purified water body exceeds the standard, and the water body purification effect is improved. At the moment, the quality of the water body purified by the device can be improved.

The present invention relates to a synthesis process of 2-bromo-5-methoxybenzoic acid represented by formula (1). The method comprises carrying out a bromination reaction on 3-methoxybenzoic acid at the C-2 position in an organic acid solution in the presence of an alkali metal bromide and a bromate to synthesize the 2-bromo-5-methoxybenzoic acid compound. The method has high selectivity, simple post-treatment, high yield and purity of the product, opens up a new synthetic route and method for synthesizing 2-bromo-5-methoxybenzoic acid, and has good application potential and research value.

The invention discloses a method for removing bromate by using a microbial fuel cell, which belongs to the technical field of water treatment, and specifically comprises the following steps: 1, using anaerobic sludge of an anaerobic tank of a sewage treatment plant as inoculation sludge in a non-biological cathode MFC (Microbial Fuel Cell) reactor to obtain anode electrogenesis bacteria; 2, adding the anode electrogenesis bacteria in the step 1 into an anode of a biological cathode MFC reactor, adding supernate of pretreated sludge obtained after anaerobic fermentation treatment of the sludge to serve as an anode substrate, mixing denitrifying bacteria with sterile water, and centrifuging to obtain turbid liquid of cathode inoculation bacteria liquid; mixing the inoculated bacteria liquid with PBS containing BrO3 <->, adding the mixture into a cathode of a biological cathode MFC reactor, successfully starting the cell, and enriching BrO3 <-> reducing bacteria on the cathode; and 3, the bromate can be removed in the biological cathode MFC reactor. According to the method, the bromate ions are removed by using a biological reduction removal method, so that the method is economical and environment-friendly, secondary pollution is avoided, and no waste liquid is generated.

The invention discloses a multifunctional hair cosmetic active raw material as well as a preparation method and application thereof. The active raw material is cystine dimaleate amide. The disulfide bond-containing molecule with a symmetric maleic acid structure is used as a sulfydryl reconnection reagent, so that a traditional oxidized sulfydryl reconnection reagent represented by hydrogen peroxide, bromate, iodate and the like is avoided, the content of the disulfide bond in hair is maintained while the hair is shaped, and particularly, after multiple times of perming, the hair is more comfortable to use. Compared with the prior art that a large amount of disulfide bonds are consumed after perming, the supplement and the shaping method are used for perming, so that the hair can be effectively and repeatedly permed according to the willingness of consumers, and the hair styles can be changed for multiple times.

The invention relates to a benzofuranone compound salt form and / or crystal form with a structure shown in a formula I as well as a preparation method and application of the benzofuranone compound salt form and / or crystal form. The invention provides a pharmaceutically acceptable salt of a benzofuranone compound as shown in a formula I. The pharmaceutically acceptable salt is one of hydrochloride, sulfate, phosphate, hydrobromide, maleate, tartrate, fumarate, citrate, p-toluenesulfonate, benzene sulfonate, mesylate, succinate, acetate and lactate. The salt formed by the compound shown in the formula I has a structure shown in a formula II, and n is selected from 1 or 2. The dynamic solubility is better, the stability is better, the absorption of the medicine, the stability of the medicine effect and the storage stability are facilitated, and the pharmaceutical prospect is better.

The invention belongs to the technical field of electrochemical wastewater treatment, and relates to a Sm diatomic electrocatalyst, a preparation method thereof and a method for treating oxysalt wastewater. The catalyst takes nitrogen-doped carbon as a carrier, and Sm-Sm diatomic sites are anchored in a carbon skeleton in an atomic scale manner through Sm-N coordination. The preparation method comprises the following steps: self-assembling Sm2O3 and a nitrogen-containing organic matter in a buffer solution to obtain a precursor, carrying out high-temperature carbonization in an inert atmosphere, and then carrying out acid etching to remove redundant oxides so as to obtain the high-density Sm diatomic site. The catalyst is loaded on a conductive substrate as a cathode, and negative potential is applied to an aqueous solution containing nitrate, bromate and / or perchlorate, so that the nitrate can be efficiently reduced into nitrogen, the bromate and the perchlorate are reduced into corresponding halide ions, and the catalyst is prepared. The catalyst has the advantages of hydrogen evolution reaction inhibition, high oxysalt removal rate, good target product selectivity, excellent stability and the like.

The invention relates to an industrial large-scale preparation method of 5-{2-[benzyl-(1-(4-hydroxyphenyl)-1-methylethyl) amino]-1-hydroxyethyl} benzene-1, 3-diol hemifumarate, the salt is composed of two molecules of 5-{2-[benzyl-(1-(4-hydroxyphenyl)-1-methylethyl) amino]-1-hydroxyethyl} benzene-1, 3-diol and one molecule of fumaric acid, and the two molecules of fumaric acid are different from each other. The compound has the following structural formulas (2) and (1). The 5-{2-[benzyl-(1-(4-hydroxyphenyl)-1-methylethyl) amino]-1-hydroxyethyl} benzene-1, 3-diol hemifumarate is a useful intermediate for synthesizing 5-[(1RS)-2-[(1RS)-2-(4-hydroxyphenyl)-1-methylethyl) amino]-1-hydroxyethyl] benzene-1, 3-diol hydrobromide, and the common name of fenoterol hydrobromide in the pharmaceutical field is known by people.

A composition for producing a biocide is provided. The composition comprises an ammonium salt, aqueous ammonia and sodium bicarbonate. The composition can be mixed with a hypochlorite oxidant to form a biocide. Previously known compositions included only an ammonium salt and optionally a base. The present composition is more economically favorable and has a more optimum pH relative to previously known compositions comprising an ammonium salt of a strong acid (hydrobromic, hydrochloric or sulfuric) or comprising ammonium carbamate and sodium hydroxide. Preparation of the biocide can be monitored with a control parameter. A new control parameter, the ratio ORP / pH, is introduced.

The application relates to a benzofuranone compound salt type and / or crystal type with a structure of formula I and a preparation method and application thereof. The application provides a pharmaceutically acceptable salt of a benzofuranone compound shown in formula I, wherein the pharmaceutically acceptable salt is one of hydrochloride, sulfate, phosphate, hydrobromide, maleate, tartrate, fumarate, citrate, p-toluenesulfonate, benzenesulfonate, methanesulfonate, succinate, acetate and lactate; the salt formed by the compound of formula I has a structure as shown in formula II, and n is selected from 1 or 2. The dynamic solubility is better, the stability is better, the drug absorption is facilitated, the drug efficacy is stable, the storage stability is good, and the application prospect is better.

The application belongs to the technical field of medicine synthesis process, and particularly relates to a preparation method of high-yield and high-purity buspirone hydrochloride. The application takes 8-(2-pyrimidyl)-8-azido-5-5-azospiro[4.5]decane hydrobromide (referred to as pyrimidine piperazine quaternary ammonium salt) and 3,3-tetramethylene glutarimide as raw materials, takes a mixed solvent of toluene, normal pentanol and / or normal hexanol as a solvent, does not need to add a phase transfer catalyst, and can generate buspirone in the presence of sodium carbonate. After acid adjustment and extraction, toluene is removed in the reverse phase, the water phase is adjusted to be alkaline, toluene is extracted, hydrogen chloride ethanol solution is added, and buspirone hydrochloride solid is directly precipitated. The preparation process has a good removal effect on impurities, the obtained buspirone hydrochloride has high purity, high process yield, good atomic economy and small three-waste output.

The application discloses a pipeline direct drinking water secondary pollution treatment method and a pipeline direct drinking water system. The treatment method comprises the following steps: setting a first working mode and a second working mode according to the water use frequency of users in a target area; in the first working mode, a circulating driving device is started for a first preset time length every first preset period, and a circulating treatment device performs ozone sterilization for a second preset time length and ultraviolet sterilization for a third preset time length every first preset period; and in the second working mode, the circulating driving device is closed. The treatment method solves the problems of excessive microorganisms in water caused by pipeline secondary pollution, excessive bromate caused by excessive ozone, and high cost caused by the continuous opening of the circulating driving device at a low cost by controlling the ozone sterilization time length, the ultraviolet sterilization time length, and the water circulation time length of the circulating driving device in the first working mode.

Disclosed herein is a method of extracting metal from a metal sulfide containing material comprising the steps of: a) providing an aqueous acidic oxidant mixture comprising water, an acid, an oxidising means, and a halide ion source, wherein the aqueous acidic oxidant mixture has a pH of less than 7; wherein the oxidising means comprises hydrogen peroxide, ozone, oxygen, chlorine, bromine, iodine, hypochlorous acid, hypobromous acid, hypoiodous acid, a hypochlorite salt, a hypobromite salt, a hypoiodite salt, a percarbonate salt, a persulfate salt, a permanganate salt, an anode connected to a power source, or combinations thereof; b) contacting the aqueous acidic oxidant mixture with the metal sulfide containing material to extract the metal from the metal sulfide containing material and form a metal halide solution; wherein the metal comprises copper, nickel, lead, zinc, or combinations thereof.

The invention provides a synthesis method of an ether compound, which is characterized in that a compound as shown in a formula (1) is used as a raw material and reacts in an organic solvent under the action of triethylamine hydrobromide (Et3N.HBr) to generate the ether compound as shown in the formula (1). According to the method provided by the invention, the Et3N.HBr which is low in price, easy to obtain and commercialized is adopted as the accelerant, and direct cross etherification between two alcohol molecules is realized under a mild reaction condition. According to the method, water is used as a unique by-product, so that toxic wastes and a large amount of inorganic salt wastes generated in the prior art are fundamentally avoided; meanwhile, the method has wide substrate applicability, can be efficiently compatible with various complex enol substrates including alkali-sensitive groups, acid-sensitive groups and secondary alcohol and tertiary alcohol structures, is simple and convenient to operate, does not need special equipment, and provides an efficient, economic, environment-friendly and easy-to-scale new way for synthesis of ether compounds.

This invention belongs to the field of water treatment technology, specifically an electrocatalytic filter membrane for removing bromate from water, its preparation method, apparatus, and application. S1: Carbon nanotube sponge is cut or selected as the substrate, with a size of 20×20×1mm. Simultaneously, aminophthalocyanine copper (purity ≥95%), binder (Nafion 117 solution, concentration 5wt%), and organic solvent N,N-dimethylformamide (DMF, purity ≥99.8%) are prepared. S2: The aminophthalocyanine copper powder and Nafion 117 solution are mixed in DMF solvent using an ultrasonic device at room temperature to form a uniform conductive ink. The electrocatalytic filter membrane prepared by this method has a copper loading of 1.0~3.0 wt%, and the bromate removal rate reaches over 96%. In application, the current density of the electrocatalytic filter membrane is 2~5 mA / cm². 2 Energy consumption is as low as 0.75 kWh / g BrO3. ‑ It operates stably for 120 hours and is suitable for water bodies with bromate concentrations of 0.2~5.0 mg / L. The direct reduction mechanism avoids the problem of organic matter quenching and solves the technical problem of "high energy consumption and poor stability of electrocatalytic materials in reducing bromate".

The invention belongs to the technical field of water treatment, and particularly relates to an electro-catalysis filter membrane for removing bromate in water, a preparation method, a device and application, the electro-catalysis filter membrane comprises the following steps: S1, cutting or selecting a carbon nanotube sponge as a substrate with the size of 20 * 20 * 1mm, and simultaneously preparing amino copper phthalocyanine (the purity is greater than or equal to 95%), an adhesive (Nafion 117 solution with the concentration of 5wt%) and an organic solvent N, N-dimethylformamide (DMF with the purity of greater than or equal to 99.8%); s2, mixing the amino phthalocyanine copper powder and a Nafion 117 solution in a DMF solvent, and mixing at room temperature by using ultrasonic equipment to form uniform conductive ink; the copper load of the electro-catalytic filter membrane prepared by the preparation method is 1.0-3.0 wt%, the bromate removal rate is up to 96% or above, the current density of the electro-catalytic filter membrane is 2-5 mA / cm < 2 >, the energy consumption is as low as 0.75 kWh / g BrO3 <->, the electro-catalytic filter membrane is stable in 120-hour operation, the electro-catalytic filter membrane is suitable for a water body with the bromate concentration of 0.2-5.0 mg / L, the problem of organic matter quenching is avoided by a direct reduction mechanism, and the electro-catalytic filter membrane is suitable for industrial production. The technical problems of high energy consumption and poor stability of reduction of bromate by an electro-catalytic material are solved.

This invention relates to a mineral water processing method, particularly a method and system for ozone sterilization flow recirculation compensation in mineral water. The method and system include: obtaining a critical contact time; obtaining a target flow rate based on the critical contact time; obtaining the current influent flow rate into the ozone contact tank; comparing the current influent flow rate with the target flow rate, calculating a flow gap value, and determining a recirculation compensation flow rate based on the gap value; recirculating the treated water back to the influent end according to the recirculation compensation flow rate to maintain a constant overall flow rate in the contact tank at the target flow rate; and dynamically adjusting ozone dosing parameters. Through flow recirculation compensation, the overall flow rate in the contact tank is no longer constrained by the actual demand at the end of the production line. Under low-load conditions, the single residence time of the water can be artificially shortened by increasing the recirculation flow rate, solving the problem of bromate exceeding the standard caused by prolonged exposure of water to the ozone environment due to reduced flow rate.

The present invention provides a highly versatile copper sulfate plating solution for circuit formation, with which it is possible to perform both a smoothing plating treatment and a recess-filling plating treatment using the same plating solution. The present invention is a copper sulfate plating solution that is composed of copper sulfate, sulfuric acid, and chlorine, and contains a brightener, a polymer, a leveler A, and a leveler B as additives, said copper sulfate plating solution being characterized by the addition of a mixture of: the leveler A, which is an amine compound obtained by reacting epichlorohydrin with a nitrogen compound selected from among ammonia, alkyl amines, aliphatic amines, and aromatic amines; and the leveler B, which is a methyldiallylamine such as a N-methyldiallylamine hydrobromide / sulfur dioxide copolymer.

The invention discloses a method for recycling bromine, and belongs to the technical field of bromine extraction. The method comprises the following steps: in a microbubble reactor, oxidizing a sodium bromide aqueous solution into bromine by adopting a mixed gas containing ozone and air; in the reaction process, the pH value of a reaction system is regulated to be 2.5-3.5 through inorganic acid, the reaction temperature is controlled to be 25-45 DEG C, the reaction temperature is controlled to be 0.2-1.2 standard m < 3 > / h.L of reaction liquid, the reaction is stopped when the oxidation-reduction potential of the system reaches 800 mV, and generated bromine is instantly blown out of the reactor through mixed gas and is prevented from being excessively oxidized into bromate; and after the reaction, supplementing sodium bromide into the residual solution until the byproduct sodium salt is saturated and separated out, filtering out the sodium salt, and recycling the residual solution. According to the method, ozone is used as an oxidizing agent, mass transfer is enhanced through the microbubble reactor, the pH and the oxidation end point are accurately controlled, the bromine recovery rate and the product purity are remarkably improved, and the method is suitable for resourceful treatment of industrial bromine-containing wastewater.