23 results about "Bromine water" patented technology

The invention discloses an aluminum alloy material easy to oxidize and color and a preparation method thereof.The aluminum alloy material is prepared from, by weight, 20-25 parts of aluminum alloy powder, 5-10 parts of graphene, 4-6 parts of p-nitrophenol, 0.5-1 part of concentrated bromine water and 4-7 parts of magnesium powder. And graphene treatment, aluminum alloy and graphene dispersion treatment, drying, water washing and vacuum hot pressing are carried out. Graphene is doped with the aluminum alloy, the comprehensive performance of the aluminum alloy can be remarkably improved, the hardness can be improved, the electrical conductivity and the thermal conductivity can be remarkably improved, halogen elements are introduced, the activity of the aluminum alloy is improved, the oxidized capacity is improved, the coloring efficiency is improved, and the flame retardant property is improved; and the magnesium powder is added, so that the stability of the system is protected, and the hardness of the system is improved.

The invention belongs to the field of spectrum chemical analysis, and particularly relates to a detection method for measuring the silver content in crude copper through atomic absorption spectrometry. The method comprises the following specific steps: dissolving with nitric acid, adding bromine water and hydrochloric acid, steaming to be nearly dry, and leaching with hydrochloric acid; if particles which are not completely dissolved exist only by using nitric acid and hydrochloric acid, filtering, adding a saturated ammonium bifluoride solution, nitric acid-sulfuric acid mixed acid and perchloric acid, heating and dissolving, smoking until smoke is exhausted, adding hydrochloric acid for leaching, transferring into a volumetric flask (not separately taken), taking hydrochloric acid as a medium, matching a copper matrix with a silver standard solution, acetylene as fuel gas and air as combustion-supporting gas, and performing gradient elution to obtain the copper-silver alloy. And measuring the silver content on an atomic absorption spectrometer. The method has the characteristics of simplicity in sample pretreatment, high detection result accuracy, good precision, simplicity in operation, high practicability and the like.

The invention relates to the technical field of energetic material synthesis, and particularly provides 5, 5 '-azotetrazole salt and a preparation method thereof.The preparation method comprises the following steps that 1, pretreated carbon cloth is immersed in a mixed solution formed by dissolving cobalt nitrate hexahydrate, ammonium fluoride and urea in deionized water, after a hydrothermal reaction, the carbon cloth is taken out and calcined in the air atmosphere, and a precursor is obtained; and finally, the cobaltosic oxide electrode material loaded on the carbon cloth is prepared. 2, dissolving 5-aminotetrazole in an alkaline solution to prepare an electrolyte, forming a three-electrode system by taking the electrolyte and cobaltosic oxide loaded on carbon cloth as a working electrode, a platinum sheet as a counter electrode and a mercury / mercuric oxide electrode as a reference electrode, and electrifying to carry out electrochemical reaction; 3, bromine water is dropwise added into the three-electrode system in the electrifying electrolysis process, hydrochloric acid is dropwise added to adjust the pH value after the reaction is finished, extraction and rotary evaporation are conducted, and the final product 5, 5 '-azotetrazole salt is obtained.

The utility model discloses a water separation device for bromine production, and belongs to the technical field of bromine production. Comprising an extraction cylinder, the lower portion of the extraction cylinder is communicated with a bromine box through a connecting pipe, the connecting pipe is provided with an electromagnetic valve, the upper portion of the extraction cylinder is provided with a circulating pump, the water inlet end of the circulating pump is connected with a water pumping pipe, and the water outlet end of the circulating pump is connected with a water outlet pipe; the tail end of the water pumping pipe is arranged at the bottom of the inner cavity of the extraction barrel; the water outlet pipe is arranged at the middle-upper part of one side of the inner cavity of the extraction barrel; the suspension sealing block can float on the upper portion of a carbon tetrachloride solvent after bromine and water are separated and settle at the bottom of water, so that when bromine is discharged, the suspension sealing block descends along with the liquid level of the bromine, and when the bromine is about to be completely discharged, the connection pipe can be sealed, and it is guaranteed that the discharged bromine is completely separated from the water. And manual control is not needed in the bromine removal process.

The application discloses a preparation method of bromo-trifluoromethylthioacetophenone and belongs to the field of chemical synthesis. The application provides a novel method for the bromo-trifluoromethylthio substitution of the bifunctionalization reaction of styrene, and the easily obtained trifluoromethylthio silver and bromine water are used as the trifluoromethylthio source and the bromine source, respectively, the substrate has wide applicability, and the raw material is simple and easy to obtain. In addition, the method can realize the synthesis of the target product, and the target product can be obtained in a good yield in 2-12 hours, and the method is more rapid and efficient. The synthesis method can synthesize the bromo-trifluoromethylthioacetophenone compound under relatively simple conditions by using the simple and easily obtained aryl olefin, realizes the bromo-trifluoromethylthio bifunctionalization of the styrene, and converts the styrene into the fluorine-containing building block compound which has wide application in the fields of medicine, pesticide and petroleum chemical industry.

The utility model belongs to the technical field of separation bottle devices, and particularly relates to a steel lining fluorine-bromine water comprehensive separation bottle for extracting bromine from seawater, which comprises a bottom frame, a separation bottle body is arranged above the bottom frame, one end of the separation bottle body is fixedly connected with a separation pipe, and an annular frame is arranged in the separation bottle body. Corresponding connecting holes are formed in the annular frame and the separation pipe, a through hole is formed in the rotating ring, connecting rods are fixedly connected to one side of the rotating ring, a fixing block is fixedly connected between the connecting rods, and a rotating rod is fixedly connected to one side of the fixing block; bromine water can be separated through a liquid inlet pipe and a separation bottle body, and one end of a rotating rod is located outside the center of the separation bottle body, so that a fixed block can be rotated by the rotating rod, the height of a through hole located on an annular frame is adjusted, the through hole can correspond to the bottom position of water, and the water is extracted and discharged; the device can be used for extracting and separating water separated from bromine water under the condition of ensuring that the device is sealed.

The utility model discloses a waste heat deep recovery type bromine extraction distillation tower system, and belongs to the technical field of salt chemical engineering and waste heat recovery. In order to solve the problem that more steam needs to be consumed in the process that the finished liquid is fed into a bromine extraction distillation tower to prepare liquid bromine, an efficient low-temperature deep heat recoverer with extremely high corrosion resistance is additionally arranged between the finished liquid and bromine extraction waste liquid, and the waste liquid is discharged after the temperature of the waste liquid is reduced to the temperature difference of about 5 DEG C at a heat exchange end, so that residual heat resources are recovered to the greatest extent; the finished liquid enters the bromine extraction distillation tower after being greatly heated, the boiling temperature can be reached only by supplementing and adding a small amount of steam, the bromine extraction waste liquid obtained after the bromine steam is evaporated along with the water vapor is discharged, and the finished liquid is continuously heated; and condensing and separating mixed steam of bromine steam and water vapor to generate liquid bromine, returning the residual crude bromine water to the absorption tower to continuously generate finished liquid and feeding the finished liquid into the bromine extraction distillation tower, recovering waste heat from condensation heat release by adopting a high-temperature heat pump, and finally preparing steam which is used as one of steam sources of the bromine extraction distillation tower.

The invention belongs to the technical field of energetic material synthesis, and particularly relates to 5, 5 '-azotetrazole salt and a preparation method thereof.The preparation method comprises the following steps that 1, under the ice bath condition, alkali metal hydroxide is added into bromine water in batches, magnetic stirring and uniform mixing are conducted, and an alkaline mixed solution is obtained; 2, the alkaline mixed solution is kept in a stirring state, 5-aminotetrazole powder is added, the 5-aminotetrazole powder is added in a batch, small-amount and multiple-time mode, the adding amount each time does not exceed 0.05%-0.1% of the weight of the alkaline mixed solution, after the 5-aminotetrazole powder is added at a time, no bubbles are generated, then the next batch of 5-aminotetrazole powder is added, and after the 5-aminotetrazole powder is added at a time, the 5-aminotetrazole powder is stirred to be uniform; continuously stirring until the solid is completely dissolved; and step 3, dropwise adding hydrochloric acid into the mixed solution obtained in the step 2, adjusting the pH value, adding ethyl acetate, and carrying out extraction and rotary evaporation to finally obtain the solid target product 5, 5 '-azotetrazole salt. An ionic electrocouple oxidation system is adopted, high-temperature and high-pressure conditions are not needed, the reaction can be efficiently completed at normal temperature and normal pressure, operation is easy and safe, and the obtained product is high in purity.

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.

The present invention discloses a method for leaching zinc phase in zinc ore, which adopts hydrochloric acid-stannous chloride solution to selectively dissolve the smithsonite phase. Stannous chloride can effectively inhibit the Fe 3+ The hydrochloric acid system avoids dissolving hemimorphite in the oxidation of sphalerite, ensuring the accuracy of the zinc content determination results in the smithsonite phase; a hydrogen peroxide solution is used to selectively dissolve sphalerite, avoiding the use of saturated bromine water as a leaching agent, making it more environmentally friendly, significantly shortening the subsequent leachate treatment time, improving detection efficiency, reducing the workload of detection personnel, and facilitating industrial on-site application; it is proposed that the zinc oxidation rate in zinc ore be calculated by dividing the sum of the zinc content in smithsonite and hemimorphite by the total amount of zinc in each phase of smithsonite, sphalerite and hemimorphite, rather than dividing by the total zinc content in the sample. Calculating the oxidation rate in this way can effectively eliminate the influence of systematic errors caused by the instruments and environment during the phase separation process.

The invention relates to a method for separating platinum, palladium and rhodium from bromine water in an iron alloy, which comprises the following steps: 1) pretreating raw materials to obtain a ferrosilicon alloy; 2) preparing a pregnant solution; sequentially crushing and calcining the ferrosilicon alloy, and adding bromine water into the calcined product for dissolving reaction to obtain a pregnant solution; and (3) separating precious metals, sequentially carrying out ammonia water regulation and hydrochloric acid reaction on the pregnant solution to obtain platinum-rhodium liquid and precipitates, adding a reducing agent into the precipitates to obtain metal palladium, sequentially adding an oxidizing agent and ammonium chloride into the platinum-rhodium liquid to react to obtain rhodium-containing liquid and ammonium chloroplatinate precipitates, adding formic acid into the ammonium chloroplatinate precipitates, and introducing hydrogen to obtain metal platinum, sodium hydroxide, hydrochloric acid, DETA and formic acid are sequentially added into the rhodium-containing liquid for a reaction, and metal rhodium is obtained. The method is ideal in design, not only improves the dissolution rate of platinum, palladium and rhodium, but also improves the separation efficiency, and can meet the requirements of industrial production scale for recovering and refining platinum, palladium and rhodium in the iron alloy in the waste three-way catalyst, and the precipitation rate of platinum, palladium and rhodium reaches 99% or above.

The utility model relates to a bromine quality improving system, and belongs to the technical field of inorganic chemical equipment. The system comprises a bromine storage tank, a diaphragm pump, a completion liquid pump and a completion liquid tank, the bottom of the completion liquid tank is connected with the completion liquid pump, the completion liquid pump is connected with a distillation system and the bromine storage tank, the bromine storage tank is connected with one end of the diaphragm pump through a bromine water conveying pipeline A, and the other end of the diaphragm pump is connected with the completion liquid tank through a bromine water conveying pipeline B; and the other end of the diaphragm pump is connected with a bromine storage tank through a bromine water conveying pipeline C. Hydrobromic acid in the completion liquid and chlorine are used for chemical reaction, the diaphragm pump is used for enabling the hydrobromic acid to fully react with chlorine in bromine in the bromine storage tank, chlorine is used for generating chloride ions, the chloride ions are dissolved in bromine water, the diaphragm pump is used for discharging the bromine water into the completion liquid tank, and the bromine water is supplied to the distillation system through the completion liquid pump. The bromine in the bromine water is extracted through distillation, so that the purity and the quality of the bromine are improved.

The utility model provides a bromine extraction system. The bromine extraction system comprises a distillation still, a condenser and a separator, the distillation still is provided with a heat exchanger and can contain and heat bromine-containing liquid to form bromine steam. The distillation kettle is connected with the condenser, and bromine steam can be liquefied in the condenser to form bromine. And the condenser is connected with the separator so as to introduce bromine into the separator. A bromine outlet and a bromine water outlet are formed in the separator, and the bromine water outlet is directly or indirectly connected to the distillation kettle, so that the bromine water formed in the separator is introduced into the distillation kettle for cyclic utilization.

The invention relates to the technical field of analytical chemistry, and discloses a method for measuring thallium in lead smelting slag through polyurethane foam plastic adsorption enrichment-inductively coupled plasma atomic emission spectrometry. The preparation method comprises the following steps: putting a sample into a polytetrafluoroethylene beaker, sequentially adding hydrochloric acid, nitric acid, hydrofluoric acid, perchloric acid and sulfuric acid, heating and decomposing, after completely decomposing, adding aqua regia, heating and dissolving salts, adding water for diluting, dropwise adding bromine water into the solution until the solution is in stable light yellow, shaking uniformly, adding a piece of polyurethane foam plastic, carrying out vibration adsorption, taking out the foam plastic after adsorption, and drying to obtain the polyurethane foam plastic. The method comprises the following steps: washing with water, squeezing water, putting the foamed plastic into a test tube, adding a sulfurous acid-hydroquinone mixed solution for releasing, taking out the foamed plastic after releasing, uniformly shaking, and measuring on an inductively coupled plasma emission spectrum. The method is simple and rapid to operate, and has reference value in the fields of lead smelting slag analysis method standard formulation, standard sample development, environmental protection and the like.

The present application relates to a kind of trace Br doped Co3O4 Nanowire anode material, preparation method and electrochemical disinfection device, and preparation method includes: the pretreated nickel foam is obtained by pickling, cleaning, drying foam nickel;Soluble cobalt salt, urea, ammonium fluoride and sodium bromide are dissolved in water, mixed to obtain precursor solution, pretreated nickel foam is immersed in and hydrothermal reaction is carried out, and cobalt oxide precursor containing bromine is grown on the foam nickel base;Then calcine in oxygen-containing atmosphere, anode material is obtained.The material is doped in the lattice by replacing the lattice oxygen of Co3O4 Br, and ammonium fluoride is used as structure directing agent to induce nanowire formation.The present application also provides an electrochemical disinfection device comprising the anode material.The present application realizes the selective generation of bromine radicals in high-chlorine and low-bromine water body by bromine doping, and at the same time, the electric perforation effect is generated by nanowire tip, so as to realize efficient disinfection and greatly reduce halogenated by-products, with the advantages of safety, speed, no secondary pollution.

The utility model relates to the technical field of bromine extraction and mirabilite preparation equipment, in particular to a concentrated high-nitrate liquid bromine extraction and mirabilite preparation device, which comprises a hot blowing device, a condensing device, a nitrate extraction device, a bromine-water separation device and a bromine storage barrel, the bromine output end of the hot blowing device is connected with the input end of the condensing device; the saltpeter output end of the hot blowing device is connected with the input end of the saltpeter extraction device; a liquid outlet of the condensing device is connected with an input end of the bromine-water separating device; the input end of the bromine storage barrel is connected with the bromine output end of the bromine-water separation device, bromine in concentrated high-nitrate liquid or bromine contained in waste liquid after bromine extraction can be extracted by utilizing a method of the hot blowing device, the utilization rate of brine resources is improved, and after the hot blowing device is combined with the bromine extraction device, the utilization rate of the brine resources is improved. The concentrated bromine-containing high-saltpeter liquid can be used for producing saltpeter, and the production efficiency is improved.

The invention belongs to the technical field of hydrometallurgy, and particularly relates to a preparation method of 6N high-purity copper. It is worth mentioning that the additive adopted in the method also has remarkable applicability in the aspect of reducing the silver content in the 4-6N high-purity copper. Drilling a hole in the copper anode plate for hanging a copper hook, then cleaning, and simultaneously cleaning the filter bag and the cathode plate; putting the copper anode plate and the copper cathode plate which are respectively sleeved with the filter bags into an electrolytic cell, preparing electrolyte, adding the electrolyte into an electrolysis system, and starting circulation at the same time; an additive is added, the additive is any halogen simple substance of bromine water or iodine, electrolyte circulation is started, the electrolyte enters the electrolytic bath from the lower part and flows out of the electrolytic bath from the upper part, after circulation is uniform, a direct-current power source is turned on, the current is adjusted to 80-150 A / m < 2 >, and electrolysis is conducted at the temperature of 20-60 DEG C; and in the whole electrolysis process, the circulation speed is maintained, a proper amount of additives, ultrapure water and acid are continuously supplemented into a circulation tank, electrolyte components are maintained to be stable, and cathode copper, namely the 6N high-purity copper, is obtained. The high-purity copper prepared through the method is low in impurity content, especially the minimum Ag content can reach 0.008 ppm, and the silver reduction effect is remarkable.

The invention belongs to the technical field of electrochemical separation, and discloses a preparation method of an electrode material for electrically controlling bromine extraction from sea brine. The method comprises the following steps: synthesizing SrBiO2Br nanosheets through a hydrothermal reaction, dispersing the SrBiO2Br nanosheets in a polar solvent, adding a pyrrole monomer, and carrying out in-situ chemical oxidation polymerization by using bromine water under an ice bath condition to prepare a SrBiO2Br coated PPy electrode material with a uniform PPy coating layer; and then, mixing the electrode material with conductive carbon black and a binder, coating the mixture on a conductive substrate, and drying to obtain the composite electrode. The composite electrode has high bromine ion adsorption capacity, high selectivity, excellent cycle stability and reusability, is used for electrically-controlled bromine extraction from sea brine, and is mild in preparation process and free of secondary pollution.

The utility model discloses a bromine recovery device in decabromodiphenyl ethane production, which comprises a distillation kettle, a condenser, a bromine-water separator, a pickling tower and a drying tower which are sequentially connected through pipelines, the pretreatment box is composed of an air inlet guide cylinder, a mechanical filter cylinder and an electrostatic filter cylinder which are sequentially connected through flanges, a primary filter screen and a secondary filter screen are installed in the mechanical filter cylinder, a support is installed in the electrostatic filter cylinder, and a plurality of dust collection electrode plates are evenly arranged on the support. And a plurality of corona electrode bars are arranged between the adjacent dust collection electrode plates. According to the utility model, the pretreatment box consisting of the air inlet guide cylinder, the mechanical filter cylinder and the electrostatic filter cylinder is used for filtering and removing particulate matters from bromine-containing waste gas before the bromine-containing waste gas enters the distillation kettle, so that subsequent equipment is protected, and the service life of the equipment in the whole bromine recovery system is prolonged.

The invention provides a bromine extraction method and a bromine extraction system for seawater, and the bromine extraction method comprises the following steps: S1, adding a hydrochloric acid solution into the seawater for acidification treatment, and introducing chlorine into the seawater for oxidation treatment to obtain bromine-containing seawater; s2, enabling the bromine-containing seawater to be in reverse contact with the circulating gas, and performing blowing-out treatment to obtain bromine-containing circulating gas and bromine-blown seawater; s3, enabling the bromine-containing recycle gas to be in contact with a sodium hydroxide solution for absorption treatment, and carrying out disproportionation reaction to obtain absorption completion liquid rich in bromide ions and bromate ions and recycle gas; s4, enabling the absorption completion liquid to be in contact with a hydrochloric acid solution to generate a neutralization reaction, and introducing steam for distillation treatment to obtain bromine-containing steam and tail liquid; s5, sequentially performing condensation bromine-water separation treatment on the bromine-containing water vapor to obtain industrial bromine, bromine-containing water and bromine-containing gas; seawater is adopted as a raw material, and the whole process of hydrochloric acid acidification, chlorine oxidation, air blow-out, alkaline absorption and distillation bromine extraction is combined, so that efficient bromine extraction is realized.

The synthesis process comprises the following steps: by taking acetonitrile as a solvent, adding p-chlorophenylglycine, trifluoroacetic acid and a catalyst, uniformly stirring, dropwise adding phosphorus trichloride, carrying out acylation reaction, desolventizing after the reaction is finished, adding the solvent and 2-chloroacrylonitrile, stirring and dissolving, adding an acid-binding agent, carrying out cyclization reaction, and filtering after the reaction is finished, thereby obtaining the chlorfenapyr. The method comprises the following steps: adding bromine water and hydrogen peroxide to carry out bromination reaction, after the reaction is finished, adding a certain mass of water, centrifugally drying solids, and adding diethoxymethane, an acid-binding agent and phosphorus trichloride to carry out substitution reaction by taking methylbenzene as a solvent to synthesize chlorfenapyr. According to the method, the technological process is simplified, wastewater discharge is reduced, triethylamine which is not easy to recycle is abandoned to serve as an acid binding agent, a new acid binding agent is adopted, recycling is easier, loss is low, consumption of raw materials is reduced, the process economy is improved, the total yield of the four-step reaction is as high as 85%, the purity of the pulped and purified product is 99% or above, and the method is suitable for industrial production. And a direction is provided for a more economical process.

The present application relates to wastewater treatment technical field, specifically disclose a kind of method for purifying bromine from bromine-containing wastewater.The method provided by the present application specifically includes the following steps: step 1, adding bacteria liquid in bromine-containing wastewater, filtering, and obtaining first treatment wastewater;Step 2, adding extractant in the first treatment wastewater, standing, separating, and obtaining recovered extractant and aqueous phase;Step 3, adjusting the pH of aqueous phase to 3-4, then adding oxidizing agent, reacting at 121-130 DEG C, collecting distillate, and obtaining bromine water;Step 4, stratifying the bromine water, and collecting bromine.The method for purifying bromine from bromine-containing wastewater provided by the present application can efficiently recover bromine resources in bromine-containing wastewater, with high recovery rate and high recovery purity.

This invention belongs to the field of wastewater treatment technology, specifically relating to a method for efficiently extracting bromine from bromine-containing wastewater. The method is achieved through the following steps: 1) pH adjustment; 2) acidification; 3) oxidation: The acidified mother liquor is heated, and after heating, hydrogen peroxide is added for oxidation. Distillation is performed simultaneously with the reaction, and bromine vapor is condensed and collected. The mixture is separated into layers in a collector: the lower layer contains bromine, and the upper layer contains bromine water. The bromine is discharged and collected, while the bromine water is recycled. The treatment method provided by this invention solves the problem of low bromine yield. This method can achieve a bromide ion conversion rate of over 99% and a bromine yield of over 98%. The treatment process provided by this invention is simple and offers a good approach for subsequent efficient bromine extraction.