10 results about "Bromine water" patented technology

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 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 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 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 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 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 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.

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.