79results about "Bromine/hydrogen-bromide" patented technology

The utility model discloses a waste heat steam boiler based on integration of a sulfur combustion furnace and nitrogen heat extraction, and belongs to the technical field of salt chemical engineering and waste heat recovery. In order to solve the problem of waste of waste heat of high-temperature SO2 flue gas in the SO2 preparation process of the sulfur combustion furnace, a layer of enclosure shell is additionally arranged outside a heat-preservation-free shell of the sulfur combustion furnace, an annular area between the enclosure shell and the heat-preservation-free shell serves as a heat exchange area, nitrogen or air serves as a heat exchange medium, dividing wall type heat exchange is carried out through the shell of the combustion furnace, the temperature of the nitrogen is increased, and the heat exchange efficiency is improved. The flue gas in the furnace is discharged after the temperature is gradually reduced; after being heated, the nitrogen is fed into the miniature high-temperature waste heat hot water boiler and exchanges heat with high-temperature waste heat water through the heat exchanger, and the cooled nitrogen is returned and circularly exchanges heat. The heated high-temperature waste heat supplied water is sent to downstream heat consumers and is continuously and circularly heated; the pressure of the flash steam is 0.1-0.6 MPa, and the flash steam is supplied as process steam, so that the flue gas waste heat can be greatly recovered when the normal operation of sulfur combustion is maintained.

The utility model discloses a seawater concentration bromine extraction system based on deep waste heat recovery and new energy driving, and belongs to the technical field of salt chemical industry and new energy. On the basis of an existing seawater concentration bromine extraction system, a new energy mode is adopted for process heating, and heat exchange jackets are arranged on the outer walls of a sulfur combustion furnace 1 and a high-temperature SO2 flue 3; low-temperature air is sequentially fed into a heat exchange sleeve 26 and a heat exchange sleeve 20 through an air feeder 21 and exchanges heat with high-temperature and high-corrosion flue gas in a flue and higher-temperature flue gas in a sulfur combustion furnace, then the low-temperature air is fed into a miniature high-temperature waste heat hot water boiler 10, water is fed into a heating furnace, and cooled flue gas is subjected to circulating heat exchange through the air feeder 21. High-temperature water of the miniature high-temperature waste heat hot water boiler 10 is fed into the flash tank 23 and generates flash steam, and after the temperature of outlet water is reduced, the outlet water returns to the flash tank 23 for circulating heat exchange. Flash steam of the flash tank 23 is mixed with steam produced by the high-temperature heat pump steam producing device 37 and the new energy electric heating steam furnace 38, and then the mixture is sent to the liquid chlorine water bath 51 and the like for process heating.

The invention provides a step-by-step extraction process for potassium-rich multi-component brine, which sequentially comprises the following steps of: performing negative-pressure desulfurization on the brine to produce an alkali sulfide product; a boric acid product is produced through boron extraction by an adsorption method; magnesium hydroxide and calcium sulfate products are produced through a lime method reaction; a sodium chloride product is produced through I-stage evaporative crystallization; a calcium carbonate product is produced through a sodium carbonate method; the method comprises the following steps of: producing a lithium carbonate product by adsorbing and extracting lithium, producing iodine and bromine products by oxidizing and blowing iodine and bromine, producing a cesium nitrate product by adsorbing and extracting cesium, producing rubidium nitrate by adsorbing and extracting rubidium, and preparing sodium chloride and potassium chloride products by evaporating and concentrating at the section II. And the product quality is high, the element yield is high, the production cost is low, the operation is simple, the post labor intensity is small, the closed cycle is realized in the extraction process, the emission of three wastes is avoided, and the green and environment-friendly production is realized.

The utility model belongs to the field of chemical raw material recovery, and discloses a system for separating salt and extracting bromine from purified terephthalic acid membrane concentrated water. The system comprises a thermal decomposition device, a nanofiltration device, a static mixer and a bromine extraction rectification device. The utility model solves the technical problems that the acid consumption is large before bromine is extracted from purified terephthalic acid wastewater, and poisoning is easily caused by leakage hidden danger in the transportation and storage process of liquid chlorine.

The utility model discloses a high-temperature flue gas waste heat hot water boiler system for preparing SO2 by a sulfur combustion furnace, and belongs to the technical field of salt chemical industry and waste heat recovery. In order to solve the problem that high-grade waste heat is wasted due to the fact that high-temperature SO2 flue gas in the process of preparing SO2 through a sulfur combustion furnace is usually cooled through spraying of a water washing tower, the high-temperature SO2 flue gas is fed into an anti-corrosion miniature high-temperature flue gas waste heat hot water boiler and exchanges heat with high-temperature waste heat water supply through a heat exchanger, and the heated high-temperature waste heat water supply is fed to downstream heat users; and the medium-temperature SO2 flue gas at the outlet of the waste heat hot water boiler is returned to the water washing tower and is washed and cooled by spraying water, and the purified SO2 flue gas is sent to the downstream absorption tower to realize the absorption process of the mixed gas of bromine and air. The low-limit value of the temperature of flue gas at the outlet of the waste heat hot water boiler is controlled by an electric control valve at the outlet of a water feeding pump, and the low-limit value of the temperature of high-temperature waste heat feed water at the inlet of the waste heat hot water boiler is controlled by a water mixing control valve group to ensure that the temperature of the heat exchanger wall contacted with flue gas is always higher than the flue gas acid dew point.

The utility model relates to the technical field of rectification devices, in particular to a bromine rectification device, which improves the waste heat utilization effect, reduces the heating energy consumption of a tank body for bromine, simultaneously improves the convenience of bromine rectification, improves the circular flow effect of bromine in the tank body, reduces the deposition of bromine at the bottom in the tank body, and improves the processing quality. Comprising a tank body and a steam pipe communicated with the upper part of the outer side wall of the tank body; the upper end and the lower end of the circulating pipe are both installed on the inner side wall of the tank body, the first pump body is installed at the bottom end of the tank body, the output end of the first pump body communicates with the bottom end of the circulating pipe, and the conveying pipe communicates with the input end of the first pump body; a plurality of input ends of the conveying pipe are communicated with the tank body, a plurality of groups of reflux inlets are communicated with the upper part of the outer side wall of the circulating pipe, and the stirring device is arranged in the tank body and is used for stirring bromine.

This invention relates to the field of terephthalic acid oxidation residue technology, specifically a high-efficiency treatment method for terephthalic acid oxidation residue, comprising the following steps: S1. Pretreatment; S2. Separation; S3. Evaporation and concentration; S4. Incineration; S5. Ash dissolution; S6. Filtration; S7. Sodium carbonate recovery; S8. Sodium carbonate recycling; S9. Bromine recovery and utilization; S10. Cobalt-manganese catalyst recovery; S11. Precipitate treatment; S12. Cobalt-manganese catalyst recycling. This application utilizes the waste heat or residual heat from the top of the xylene oxidation unit as a heat source to heat and concentrate the first filtrate. The acetic acid flash evaporator in the crystallizer serves as the heat source for evaporator V3 to evaporate and concentrate sodium carbonate, reducing process energy consumption and improving sodium carbonate recovery efficiency. The incineration unit heats the furnace body through external and internal incineration components, achieving efficient incineration of the material, greatly increasing the material's heating efficiency, and improving incineration efficiency and energy utilization.

This utility model belongs to the technical field of hydrogen bromide gas drying towers, specifically a hydrogen bromide gas drying tower with replaceable packing, including a drying tower body, a protective net, and an installation mechanism. The protective net is installed on the outer wall of the drying tower body. The installation mechanism includes an installation shell, filter plates, and a fixing shell. The installation shell is located inside the drying tower body; an installation groove is formed on the inner wall of the installation shell; the filter plates are respectively installed inside the corresponding installation grooves; and the fixing shell is located inside the installation shell. This utility model places the fixing shell inside the installation shell, and then installs the filter plates into the corresponding installation grooves. A partition plate can divide the interior of the installation shell into multiple independent spaces for replacing and classifying different types of packing.

The utility model relates to the technical field of bromine production equipment, in particular to a bromine multi-stage dehumidification device which comprises a dehumidification tank, supporting legs which are symmetrically distributed are fixedly installed on the two sides of the bottom of the dehumidification tank, a drying tower is fixedly installed on the top of the dehumidification tank in an embedded mode, and a feeding pipe is fixedly installed on the top of the drying tower in a penetrating and penetrating mode. According to the bromine multi-stage dehumidification device, through cooperative use of the dehumidification tank, the supporting legs, the visual window, the feeding pipe, the drying box, the guide pipe, the inner box, the discharging pipe, the blocking net, the drying tower, the first electric valve, the second electric valve and the liquid discharging pipe, dehumidification modes of different principles are integrated, and multi-stage dehumidification is achieved on bromine. The method comprises the following steps: contacting bromine with concentrated sulfuric acid, removing most of water by using strong water absorption of the concentrated sulfuric acid, and discharging water-containing sulfuric acid in a layered manner through density difference; enabling the preliminarily dried bromine to pass through a drying box filled with anhydrous calcium chloride and a molecular sieve, and deeply adsorbing residual moisture;

The utility model relates to the technical field of hydrogen bromide purification, and discloses an electronic-grade hydrogen bromide purification device which comprises a settling tank, a rotary feeding mechanism is arranged on the settling tank, and a waste gas discharge mechanism is arranged at the top of the settling tank; the rotary feeding mechanism comprises a supporting seat, the supporting seat is fixedly mounted at the top of the settling tank, a fixed pipeline is fixedly mounted on the inner wall of the supporting seat, and a first valve pipe is fixedly connected to the top of the fixed pipeline. Through the overall design of a rotary introduction mechanism, ozone can be introduced from a first valve pipe, the ozone can penetrate through a rotary pipeline to be output from the end of a branch pipeline, meanwhile, through work of a driving motor, the rotary pipeline can be driven to rotate integrally, so that the ozone is rotationally introduced into a stock solution, and meanwhile, a stirring paddle can be driven to rotate; the stirring paddle can stir the stock solution, so that the contact effect of the stock solution and the ozone is further improved, the utilization rate of the ozone is improved, and the consumption of the ozone is reduced.

The utility model relates to a sulfuric acid separation system for bromine production completion liquid, and belongs to the technical field of inorganic chemical equipment. The system comprises a foam catching chamber, an absorption tower, an MRO membrane, a sulfuric acid tank and a hydrobromic acid tank, the bottoms of the foam catching chamber and the absorption tower are connected with a high-pressure pump through a finished liquid conveying pipeline, the high-pressure pump is connected with the input end of the MRO membrane, the output end of the MRO membrane is connected with the sulfuric acid tank and the hydrobromic acid tank, and the sulfuric acid tank is connected with an acidified brine line and a sulfuric acid loading pipeline through the sulfuric acid pump. The hydrobromic acid tank is connected with a distillation system and a hydrobromic acid loading pipeline through a hydrobromic acid pump. According to the utility model, sulfuric acid and hydrobromic acid in the finished liquid are separated by using the MRO membrane, and the separated sulfuric acid and hydrobromic acid are used for production or sale, so that the pattern of a single bromine product is refreshed.

The utility model discloses a mother liquor recycling device for bronopol production, and relates to the technical field of bronopol production, an inlet of a reduced pressure distillation kettle is communicated with a mother liquor tank through a pipeline, an outlet of the reduced pressure distillation kettle is communicated with a rectifying tower through a pipeline, and a top outlet of the rectifying tower is communicated with a first condenser through a pipeline; and an outlet of the first condenser is communicated with a bronopol tank through a pipeline. The reduced pressure distillation kettle is used for distilling the mother liquor under a reduced pressure condition, so that the boiling point of each component in the mother liquor is reduced, the energy consumption is reduced, and the decomposition or side reaction of bronopol and other components at high temperature is avoided. The mother liquor subjected to primary concentration and separation through reduced pressure distillation enters a rectifying tower, bronopol and other impurities with similar boiling points are further separated through rectification, and primary purification is achieved. The bronopol steam at the top of the tower is condensed by the first condenser and then is collected to the bronopol tank, so that the bronopol product with higher purity is obtained, and the key step of recovering bronopol from the mother liquor is coherently realized in the whole process.

The technology concerns a process for generating hydrogen gas and chemicals of high value, while preventing water oxidation and generation of oxygen gas.

The utility model relates to a device for extracting bromine from brine, and belongs to the technical field of brine resource utilization. A ceramic membrane is arranged at the lower part of the reaction tank, and one side of a membrane layer of the ceramic membrane is connected with a gas source; the reaction tank is also connected with an acid liquor adding pipe and a sodium hypochlorite adding pipe; one side of the membrane layer of the ceramic membrane is also connected with the vacuum pump; a gas outlet pipeline is arranged on the reaction tank, is connected to the absorption tank and is used for absorbing the generated bromine gas; and the pipeline for connecting the ceramic membrane and the vacuum pump is also connected to a lithium adsorbent bed layer.

The present application provides a kind of radial partition countercurrent air blowing bromine extraction tower system and process, the system of the present application is by being provided at least one vertical concentric ring-shaped partition in tower body, and the cavity of tower is physically divided into multiple independent ring reaction zone;Matched multi-ring independent liquid distributor, can be adjusted spray density by zone;While using main auxiliary collaborative gas distribution system, main gas inlet is arranged in the center of tower bottom, and adjustable auxiliary gas inlet is arranged in lateral wall ring area, and actively disturbs unfavorable flow pattern.Combined with intelligent collaborative control, realize the dynamic optimization of each ring area gas-liquid flow field.The present application effectively improves the efficiency of bromine blowing, inhibits channeling and wall flow, reduces energy consumption, is suitable for large-scale bromine production, can also be popularized to other gas-liquid countercurrent mass transfer process, solves the technical problems such as uneven gas-liquid distribution, low mass transfer efficiency and significant amplification effect in large-diameter packed tower.

The invention discloses a method for extracting bromine in brine, and belongs to the technical field of bromine extraction, the method comprises the following steps: pretreatment, oxidation and blowing out; the pretreatment comprises the following steps: carrying out plate-frame pressure filtration on the brine, adding composite calcium carbonate and sodium lignin sulfonate into filtrate, stirring at normal temperature, standing, carrying out ultrafiltration, and taking filtrate, so as to obtain pretreated brine; in the oxidation step, the pH value of the pretreated brine is adjusted to 3-3.5, zinc modified activated carbon is added, stirring is performed at normal temperature, chlorine is introduced into the brine, the chlorine matching ratio is 110-115%, then plate-frame pressure filtration is performed, and all filtrate is taken as oxidized brine. According to the method disclosed by the invention, the problem of tower blockage is not easy to occur during extraction, sulfate radicals in waste liquid after bromine blowing cannot be increased, and for brine with low bromine-chlorine coefficient, the bromine extraction rate is high, and the chlorine content in obtained bromine is low.

The invention provides a gradient extraction method of produced water associated resources. According to the produced water associated resource gradient extraction method, a pre-separation step is designed, monovalent ions and divalent ions in produced water are preliminarily separated, bromine extraction, strontium extraction and lithium extraction procedures are organically connected in series or in parallel, the strontium and lithium recovery steps can be synchronously carried out, the technological process is simpler, energy consumption is lower, and the production efficiency is improved. And efficient stepped extraction of bromine, lithium, strontium and other elements with the content reaching a certain abundance and exceeding the comprehensive industrial mining grade in the produced water is comprehensively realized in a complete set.

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 concentration device comprises a bottom plate, a filtering tank is fixedly installed at the top of the bottom plate, a vertical plate located on the back face of the filtering tank is fixedly installed at the top of the bottom plate, a strip-shaped groove is formed in one end of the vertical plate, a threaded rod is rotatably installed in the strip-shaped groove, and a threaded rod is installed in the threaded rod. The surface of the threaded rod is sleeved with a threaded sleeve in a threaded mode, one end of the threaded sleeve is fixedly provided with a moving plate, one end of the moving plate is fixedly provided with a connecting rod, one end of the connecting rod is fixedly provided with a cover plate, and the top of the vertical plate is fixedly provided with a rotating motor. The output end of the rotating motor penetrates through the vertical plate and is fixedly connected with the top of a threaded rod. According to the concentration device for extracting bromine from seawater, in the daily use process, when seawater enters the filtering tank, a rotating motor is started, the rotating motor operates to enable a threaded rod to rotate, and then the threaded rod drives a threaded sleeve to slide in a strip-shaped groove.

The invention discloses a production method and a production system of hydrogen bromide, and belongs to the technical field of electronic special gas preparation. A hydrobromic acid liquid raw material is conveyed to a first-stage rectifying tower, a first-stage tower substrate is conveyed to a second-stage rectifying tower, a second-stage tower substrate flows back to the first-stage rectifying tower, a first-stage tower top substance is conveyed to an adsorption column, and an adsorbed hydrogen bromide product is collected. Wherein the tower bottom temperature of the first-stage rectifying tower is 150-180 DEG C, the tower top temperature of the first-stage rectifying tower is-40--20 DEG C, the tower pressure of the first-stage rectifying tower is 250-750 kPa, the tower bottom temperature of the second-stage rectifying tower is 85-95 DEG C, the tower top temperature of the second-stage rectifying tower is 45-75 DEG C, and the tower pressure of the second-stage rectifying tower is 10-40 kPa. By adopting the multi-stage pressure swing distillation and adsorption dehydration under the parameter conditions, the high-purity hydrogen bromide product can be prepared, and the yield can be improved.

A process for removing at least a sulfur containing compound from gas containing at least one sulfur containing compound, wherein the process comprises the following steps: a) contacting a gas stream containing at least one sulfur containing compound with a stream containing bromine and water so as to obtain a starting stream, b) reacting the starting stream provided in step a) so as to produce a reaction mixture effluent comprising sulfuric acid and hydrogen bromide, c) separating the reaction mixture effluent obtained in step b) into one or more hydrogen bromide enriched compositions and into one or more sulfuric acid enriched compositions, d) subjecting at least a portion of the at least one hydrogen bromide enriched composition obtained in step c) to a treatment, in which at least a portion of the hydrogen bromide enriched composition is converted to bromine, e) recycling at least a portion of the bromine containing composition obtained in step d) back to step a), and f) withdrawing gas, which is depleted in the at least one sulfur containing compound wherein step c) comprises at least one distillation step, wherein, in the case that the reaction mixture is a single-phase liquid composition, either the reaction mixture effluent or a mixture of the reaction mixture effluent and a sulfuric acid enriched composition obtained in step c) is subjected as feed to a first distillation step, or, in the case that the reaction mixture effluent is a two-phase gas- / liquid composition, first the two-phase gas- / liquid composition is separated into a gaseous portion of the reaction mixture effluent and into a liquid portion of the reaction mixture effluent, whereafter the liquid portion of the reaction mixture effluent or a mixture of the liquid portion of the reaction mixture effluent and a sulfuric acid enriched composition obtained in step c) is subjected as feed to a first distillation step, wherein the feed is separated in the first distillation step into a gaseous overhead composition of a hydrogen bromide enriched composition containing at most 1,000 ppm of sulfuric acid and into a liquid bottom composition of a sulfuric acid enriched composition containing more than 30% by weight of sulfuric acid and less than 1,000 ppm of hydrogen bromide, wherein a) at least a portion of the gaseous hydrogen bromide enriched composition obtained in the first distillation step as overhead composition is subjected to a water removal step so as to separate the hydrogen bromide enriched composition into a water enriched composition and into a gaseous hydrogen bromide-rich, water depleted composition comprising 90 to 99% by weight of hydrogen bromide and less than 10% by weight of water, wherein at least a portion of the gaseous hydrogen bromide-rich, water depleted composition is subjected in step d) to an electrolysis or to a thermal oxidation step, and / or P) step c) comprises at least two distillation steps, wherein the sulfuric acid enriched composition obtained as liquid bottom composition of the first distillation step is subjected to a second distillation step so as to produce an overhead composition and a bottom composition containing 60 to 95% by weight of sulfuric acid and 5 to 40% by weight of water based on the total weight of the bottom composition, wherein at least a portion of the bottom composition of the second distillation step is preferably subjected to a third distillation step so as to produce an overhead composition containing at least 99.0% by weight of water and less than 10 ppm of hydrogen bromine and a bottom composition containing at least 90% by weight of sulfuric acid and less than 10% by weight of water based on the total weight of the bottom composition, wherein a portion of the bottom composition obtained in the second distillation step and / or a portion of the bottom composition obtained in the third distillation step is recycled to and mixed as sulfuric acid enriched composition with the reaction mixture effluent or with the liquid portion of the reaction mixture effluent so as to obtain a mixture containing at least 35% by weight of sulfuric acid based on the total weight of the mixture, wherein the mixture is subjected as feed to the first distillation step.

The utility model discloses a separation system for bromides, which belongs to the technical field of bromide production and comprises a reaction kettle, a solid-liquid separator connected to a discharge port of the reaction kettle, a bromine extractor connected to the top of the solid-liquid separator, a liquid phase separator connected to a liquid outlet of the bromine extractor, a bromine outlet arranged at the bottom of the liquid phase separator, and a bromine outlet arranged at the bottom of the liquid phase separator. A water phase outlet in the top of the liquid phase separator is respectively connected with a liquid discharge pipeline and a hydrogen peroxide oxidizer through pipelines, a gas outlet is formed in the top of the hydrogen peroxide oxidizer, a liquid outlet is formed in the bottom of the hydrogen peroxide oxidizer, and the liquid outlet of the hydrogen peroxide oxidizer is communicated with the top of the bromine extractor; an air inlet of the air blower is communicated with the top of the hydrogen peroxide oxidizer, and an air outlet of the air blower is connected with a bromine recovery tank. According to the utility model, bromine in the waste liquid is separated out before oxidation, and bromine gas generated by oxidation is taken away by arranging the air blower, so that side reactions in the hydrogen peroxide oxidizer are reduced, and the recovery rate of the bromine in the waste liquid is improved.

The invention relates to a bromine extraction device for oilfield produced water. The bromine extraction device comprises an electrolysis assembly and a purification assembly. The electrolysis assembly comprises an electrolytic bath, a plurality of electrolysis parts and a heat exchange pipe. And the plurality of electrolysis parts can electrolyze bromine ions in produced water and obtain elemental bromine. The purification assembly includes a pipe injector, and a distillation column in communication with the pipe injector. Wherein the pipeline ejector can adsorb elemental bromine blown out of the electrolytic bath through the first solution to obtain a second solution containing bromine ions, and the distillation tower is configured to be capable of conveying gaseous elemental bromine obtained by oxidizing and heating the bromine ions in the second solution into the heat exchange pipe; when the gaseous bromine simple substance is condensed and liquefied in the heat exchange tube, heat is transferred to the produced water, so that the temperature of the produced water is further increased after electrolysis. In this way, gradient utilization of heat in the bromine element extraction process is achieved, the heat utilization rate is increased, the extraction cost is reduced, and economic benefits are increased.

The application provides a resource quality grading and step-by-step utilization method for co-producing lithium and bromine from lithium-containing bromine oil and gas field brine. The method adopts a "bromine extraction first-lithium selective enrichment" resource quality grading and step-by-step utilization strategy to solve the problems of low integration, mutual interference and poor adaptability of the existing lithium-bromine co-production process. The method includes the following steps: after the brine is adjusted to be acidic, it is introduced into a bromine extraction first unit, and the bromine is extracted through a three-stage coupling process of micro-channel reaction extraction, electrochemical selective oxidation and gas stripping absorption; the debrominated brine is subjected to multi-stage gradient precipitation, ceramic ultrafiltration and lithium selective adsorption to realize efficient enrichment of lithium and step-by-step removal of impurities; finally, lithium products are prepared, and material circulation such as regeneration of the extraction agent, utilization of the precipitation filter residue and reuse of the mother liquor is realized. Through the synergistic matching of time sequence and process conditions, the mutual interference in the lithium-bromine recovery process is avoided, the comprehensive recovery rate of the two resources is significantly improved, and the method has the advantages of strong raw material adaptability, high process integration, green environmental protection and the like.

The invention discloses a polyaniline composite material. The polyaniline composite material comprises a carrier, iron and polyaniline, wherein the surface of the iron is provided with a Fe2O3 layer, the iron is uniformly distributed on the surface of the carrier, the carrier and the iron are coated with the polyaniline, and the polyaniline is in a nanofiber shape. The invention also discloses a preparation method of the polyaniline composite material, which is characterized by comprising the following steps: uniformly mixing the carrier, the iron powder and the aniline, standing, and adding an initiator solution for polymerization reaction to obtain the polyaniline composite material. The invention also discloses the polyaniline composite material and application of the polyaniline composite material prepared by the method in selective adsorption of bromide ions and preparation of elemental bromine by catalytic oxidation. The invention also discloses a method for preparing the elemental bromine from the high-salinity brine. According to the polyaniline composite material, high-halogen brine is used as a raw material, a large amount of Br <-> can be adsorbed, oxidation and desorption are carried out synchronously, and the elemental bromine and the activated polyaniline composite material are prepared synchronously.

The utility model provides a device for recovering bromine element in medical intermediate production wastewater, which comprises a supporting bottom plate, a wastewater treatment box body is arranged at the left end of the upper surface of the supporting bottom plate, a water storage box body is arranged at the right end of the upper surface of the supporting bottom plate, and a partition plate is arranged at the bottom in the wastewater treatment box body. A partition plate is arranged in the wastewater treatment box body and divides the wastewater treatment box body into a wastewater treatment area and a recovery area, the wastewater treatment area and the recovery area are arranged up and down, the wastewater treatment area and the recovery area are connected through a connecting pipe, and the wastewater treatment box body is connected with the water storage box body through a connecting piece; the medical intermediate production wastewater treatment device can be used for treating medical intermediate production wastewater and recycling bromine elements in the wastewater.

This invention belongs to the field of new materials technology, specifically relating to a high-entropy metal-organic gel membrane electrode, its preparation, and its application in bromide ion separation. The preparation method of the high-entropy metal-organic gel membrane electrode includes the following steps: (1) dissolving a soluble metal salt in anhydrous ethanol at an equimolar ratio to prepare a metal salt solution; (2) dissolving an organic ligand in anhydrous ethanol to prepare an organic ligand solution; (3) immersing the pretreated carbon felt in the metal salt solution prepared in step (1) for 12–24 h, and then placing it in the organic ligand solution prepared in step (2) for 0.5–3 h to obtain the high-entropy metal-organic gel membrane electrode. This material has a hierarchical porous structure and abundant amorphous high-energy adsorption sites. Under the synergistic effect of high-entropy multi-metal centers (Fe, Cu, Al, Zn, Zr), it achieves the adsorption of Br- ions. ‑ Highly selective capture.

The utility model relates to the technical field of bromination reaction, in particular to a bromination reaction tail gas treatment device which is provided with a red phosphorus reaction container convenient to assemble and disassemble, so that the reaction state is convenient to control, and the practicability is improved; comprising a reaction tank, an external thread opening, an air inlet pipe, an air outlet pipe, an internal thread cover, an external thread head, an internal thread sleeve, a red phosphorus net cylinder, an opening and closing valve and a drainage pipe, the middle of the top end of the reaction tank is communicated with the bottom end of the external thread opening, the outer side of the external thread opening is detachably screwed with the inner side of the internal thread cover, and the top end in the internal thread cover is connected with the top end of the external thread head; an air inlet pipe is arranged on the front side of the top end of the reaction tank, the output end of the air inlet pipe extends into the bottom side of the interior of the reaction tank, the input end of the air outlet pipe extends into the upper side of the interior of the reaction tank, and the middle lower portion of the rear side of the reaction tank is communicated with the inner side of an opening and closing valve; the outer side of the on-off valve is communicated with a drainage pipe.

The various embodiments of the disclosure relate generally to a process for converting industrial hydrohalide solutions to commercial metal halide solutions having a sufficient quality in terms of impurity content and color. An embodiment of the disclosure can include the steps of identifying a hydrohalide solution having organic and / or inorganic impurities neutralizing the hydrohalide solution with a basic material in one or more steps toa neutral or alkaline pH to produce a metal halide solution, filtering the metal halide solution to remove any alkaline insoluble impurities, and then adjusting pH of the metal halide solution to a pH of about 6.5 to about 8.

The application relates to a process for extracting bromine based on solid acid catalysis and hydrogen peroxide oxidation and application. ‑ Br2 is generated and blown out through air blowing and absorption enrichment and water vapor distillation steps, so that high-purity bromine products are obtained; the solid acid catalyst can be recycled and regenerated, and obvious activity attenuation does not occur after 15 cycles. The process can reduce liquid acid consumption by 60-80%, save alkali consumption in the neutralization process by more than 90%, reduce production cost and environmental risk, and is suitable for various bromine-containing raw materials such as salt field bitter brine and bromine-containing waste liquid.