63results about "Ammonium chloride" patented technology

The invention discloses a method for recycling process water in an APT (ammonium paratungstate) production process, and relates to the field of water recovery in an APT production process, and the method comprises the following steps: S1, recycling wastewater of an alkali extraction system; s2, evaporating strip liquor and recovering ammonia water; s3, chemical treatment of pure ammonium tungstate evaporation ammonia water; s4, ammonium molybdate evaporation ammonia water closed-loop utilization; and S5, recycling ammonia gas in a crystallization section. According to the method, the recovery rate of tungsten and molybdenum in the tail liquid is remarkably increased by optimizing the processes of wastewater reuse of the alkali extraction system, strip liquor evaporation, ammonia water recovery and the like; one part of the tail liquid is recycled in the pulping process, the other part of the tail liquid is subjected to evaporation treatment, zero emission of wastewater is achieved, evaporated condensate water can be recycled to be used for preparing a stripping agent, the utilization rate of water resources is further increased, the production cost is reduced, and meanwhile the environment-friendly requirement is met.

A system for recovering ammonia from an endothermic reaction in a subsurface formation may comprise a subsurface formation; a wellbore fluidly connected to the subsurface formation; a tubing string positioned within the wellbore, wherein the wellbore and an exterior of the tubing string together define a wellbore annulus; a wellhead comprising one or more injection lines and one or more return lines fluidly connected to the wellbore; one or more fluid injection pumps configured to supply an endothermic fluid composition to the subsurface formation through the one or more injection lines and the tubing string, the endothermic fluid composition operable to form ammonia when reacted; and one or more ammonia retention vessels fluidly connected to the return lines for receiving the ammonia through the wellbore annulus.

The invention provides an integrated preparation method of lithium iron phosphate, and belongs to the technical field of preparation of lithium iron phosphate materials. The method comprises the following steps: adding a proper amount of FeCl2 solid into FeCl2 waste liquid, mixing, and concentrating; introducing Cl2, oxidizing the FeCl2, and filtering to remove impurities, so as to obtain a high-purity FeCl3 solution; the filter residues are transferred to a building material factory to be manufactured into building materials; the method comprises the following steps: pumping a high-purity FeCl3 solution, a NH4H2PO4 solution and NH3.H2O into an overflow crystallization reaction kettle for reaction, and filtering and countercurrent washing after reaction slurry overflows to obtain a FePO4. 2H2O solution; performing triple-effect evaporative crystallization on the wastewater to obtain an NH4Cl by-product, and transferring the NH4Cl by-product to a chemical fertilizer plant to prepare a fertilizer; transferring the FePO4. 2H2O solution into a turnover tank, and carrying out concentration treatment on the FePO4. 2H2O solution; transferring into a stirring kettle, and adding lithium carbonate and glucose; and carrying out continuous drying, sintering and grading treatment.

This invention relates to a method for the resource utilization of ammonia-containing waste generated during beryllium smelting, belonging to the technical field of wastewater and waste residue treatment and resource utilization. The method includes: mixing aluminum ammonium vanadium slag with beryllium washing wastewater; mixing the resulting aluminum ammonium vanadium beryllium solution with a calcium-containing transforming agent to obtain aluminum-calcium slag and aluminum ammonium vanadium purified solution; mixing solution A with beryllium precipitation wastewater and adding a calcium-containing alkaline substance to obtain a conditioning solution and gypsum slag; adding a decalcifying agent to the conditioning solution for precipitation and decalcification to obtain decalcified slag and decalcified solution; stripping the decalcified solution to obtain ammonia water and ammonia stripping mother liquor; solution A is an aluminum ammonium vanadium beryllium solution and / or aluminum ammonium vanadium purified solution; or, mixing the aluminum ammonium vanadium purified solution with beryllium precipitation wastewater and evaporating and crystallizing to obtain ammonium salts. This method fully utilizes the ammonia resources in the ammonia-containing waste generated during beryllium smelting, preparing ammonium salts or ammonia water, achieving full recycling of ammonia nitrogen in the production process.

The present application belongs to the technical field of inorganic salt separation and purification, and discloses a method for purifying ammonium chloride solution, aiming to solve the technical problem that the prior art cannot effectively separate ammonium ions and sodium ions. The method comprises: S1, purifying agricultural-grade ammonium chloride solution containing sodium ions through a first membrane system to obtain a first permeate and a first retentate, wherein the separation layer surface of the first special membrane is electronegative; S2, secondly purifying the first permeate through a second membrane system; and S3, obtaining product ammonium chloride solution and reusable fresh water through a product recovery system from the second permeate. The present application utilizes the electronegativity of the membrane surface and the differential interface interaction of different monovalent cations to realize the preferential permeation of ammonium ions and the effective retention of sodium ions. The method does not need to adjust the pH value or heat the raw material solution, has a simple process, low energy consumption, and can obtain ammonium chloride products with a purity of more than 99.5%.

The invention relates to a production method and device for preparing ammonium / alkali through a microreactor, and belongs to the technical field of safety, environmental protection, energy conservation and water conservation. The method comprises the following steps: simultaneously feeding a saturated aqueous solution of sodium chloride and a sodium bicarbonate solution into a mixing zone for premixing, and feeding into a reaction zone for reaction through shunting to obtain a reaction mixed solution; crystallizing, filtering, washing and drying the reaction mixed solution to obtain sodium bicarbonate; performing crystallization, chemical sublimation, precipitation and recrystallization on the mother liquor obtained by filtering to obtain ammonium chloride, and recovering ammonia gas generated in the crystallization, chemical sublimation, precipitation and recrystallization processes of the mother liquor; calcining the sodium bicarbonate to obtain sodium carbonate, and recovering carbon dioxide released in the calcining process; the recovered ammonia gas, carbon dioxide and water are prepared into a sodium bicarbonate solution to be used as a reaction base solution. According to the invention, liquid-gas reaction is improved into liquid-liquid reaction, and the microreactors connected in series and in parallel are improved, so that the yield and purity of the product are improved.

The present application relates to the harmless treatment field of chemical waste liquid, and particularly discloses a device and method for solving the problem of excessive production of hydrochloric acid in the treatment process of trichloro-sucrose waste liquid, wherein the hydrogen chloride and ammonia gas in the flue gas after denitration are reacted in a gas-gas reactor to generate ammonium chloride, and the by-product of ammonium chloride is separated through heat exchange, trapping and other steps, and the considerable reaction heat is ingeniously used to generate steam for use in the workshop, so that the problems of excessive production of hydrochloric acid and corrosion of the device are solved, the water is used instead of liquid caustic soda in the flue gas purification step, the pollution treatment cost and difficulty are further reduced, and important economic benefits and environmental protection benefits are achieved.

The invention discloses a method for efficiently extracting and recycling chloride ions in desulfurization wastewater, and belongs to the technical field of industrial wastewater treatment and recycling. The method comprises the following steps: firstly, constructing a composite extraction system which takes tertiary amine N235 as a main extraction agent, n-decanol as a modifier and a mixed solution of kerosene and benzene as a diluent; then, the desulfurization wastewater is subjected to multi-stage extraction, and the chloride ion removal rate is stabilized at 68.9%-69.4%; after extraction, ammonia water is used as a back-extraction agent to carry out back extraction on an organic phase loaded with chloride ions, the back-extraction rate can reach 90% or above, and the organic phase can be recycled. The extraction system disclosed by the invention has strong anti-interference capability on common cations such as Ca < 2 + >, Mg < 2 + > and Na < + > in wastewater, solves the problems of low extraction efficiency, poor stability and high cost in the prior art, and is simple in process flow and suitable for industrial application.

A system for recovering ammonia from an endothermic reaction in a subsurface formation may comprise a subsurface formation; a wellbore fluidly connected to the subsurface formation; a tubing string positioned within the wellbore, wherein the wellbore and an exterior of the tubing string together define a wellbore annulus; a wellhead comprising one or more injection lines and one or more return lines fluidly connected to the wellbore; one or more fluid injection pumps configured to supply an endothermic fluid composition to the subsurface formation through the one or more injection lines and the tubing string, the endothermic fluid composition operable to form ammonia when reacted; and one or more ammonia retention vessels fluidly connected to the return lines for receiving the ammonia through the wellbore annulus.

The invention belongs to the technical field of industrial solid waste recycling and environmental protection, discloses a red mud total recycling and innocent treatment method based on material internal circulation, and solves the problem of high dependence degree on external materials in the current red mud treatment process. The method comprises the following steps: calcining red mud and then performing acid leaching; adding sodium carbonate while heating the pickle liquor to co-precipitate iron and aluminum in one step, and collecting CO2; washing the precipitate to obtain iron-aluminum concentrate and a sodium chloride solution; cO2 is introduced into a NaOH solution to prepare sodium carbonate; the sodium chloride solution is converted into NaHCO3 and NH4Cl through a Hou's alkali preparation method, and NaHCO3 is calcined to obtain Na2CO3 and CO2; regenerating NaOH from the Na2CO3 solution through a causticization method; and extracting silicon from acid leaching residues by using regenerated NaOH to produce white carbon black. The method disclosed by the invention fundamentally avoids the generation of high-salinity wastewater, synchronously and efficiently recovers iron, aluminum, silicon and sodium resources, and has remarkable economic and environmental benefits.

The invention discloses a salt lake brine comprehensive recovery method and system, and belongs to the technical field of salt lake resource utilization. The method comprises the following steps: performing ammonia precipitation reaction on salt lake brine and an ammonia precipitator, and then filtering and washing to obtain Mg (OH) 2 and ammonia precipitation filtrate; carrying out dehydration and roasting treatment on Mg (OH) 2 to obtain an active MgO product; introducing carrier gas into the ammonia precipitation filtrate under a negative pressure condition to perform deamination treatment, and crystallizing and drying the deaminated filtrate to obtain an ammonium chloride product; and returning ammonia gas recovered by deamination treatment to an ammonia precipitation reaction section for cyclic utilization, and recycling water obtained by crystallization and drying to a filtering and washing section for cyclic utilization. The method provided by the invention has the advantages of short process flow, low energy consumption, continuous production, increased yield, no generation of waste liquid and waste residue, and no environmental pollution, realizes efficient preparation and recovery of active magnesium oxide and ammonium chloride, and realizes efficient utilization and zero emission of salt lake brine.

The present disclosure relates to a method of carbon dioxide mineralisation, the method comprising: treating a material, such as a mineral, with carbon dioxide and a base, wherein the treatment occurs in solution phase, the material comprising: a first cation that is Ca or Mg; a second cation which is not Ca and or Mg; and one or more anions which are not carbonate; such that a product solution comprising an acid or a salt of the base and one of the one or more anions and a salt of the second cation and one of the one or more anions is formed, and a carbonate salt of the first cation is caused to precipitate.

The application discloses a kind of based on ammonium salt leaching agent cycle's smelting slag efficient low-consumption leaching method, belong to metallurgical solid waste resource utilization technical field.Water leaching is carried out to smelting slag, and the obtained water leaching residue is subjected to multistage countercurrent leaching using ammonium salt solution to obtain calcium-rich leaching solution, and the calcium-rich leaching solution is subjected to carbon fixation reaction with excess carbon dioxide gas to generate calcium bicarbonate solution;The calcium bicarbonate solution is subjected to neutralization precipitation with the obtained water leaching solution, liquid-solid separation, to obtain light calcium carbonate and ammonium salt solution, and the obtained ammonium salt solution is recycled for multistage countercurrent leaching.The method designs an ammonium salt solution closed-loop process and a calcium carbonate open-loop process, which not only reduces the acid and alkali consumption cost in the smelting slag leaching process, but also produces high-value light calcium carbonate products, realizes the resource utilization of all components of smelting slag, reduces the processing cost of smelting slag, and provides a new way for harmless, efficient and high-value utilization of steel smelting slag.

The invention belongs to the technical field of organic fertilizers, discloses a composition for preparing matured compost and application thereof, and solves the technical problems of high nitrogen loss and poor nitrogen immobilization effect of a compost finished product in the prior art. The composition for preparing the matured compost comprises a high-carbon-nitrogen-ratio biomass raw material, a low-carbon-nitrogen-ratio biomass raw material, exogenous nitrogen, citric acid-ferrous modified biochar and a complex microbial inoculant, the C / N ratio of the high-carbon-nitrogen-ratio biomass raw material is 60-80; the C / N ratio of the low-carbon-nitrogen-ratio biomass raw material is 15-20; the complex microbial inoculant A comprises organic nitrogen mineralization promoting bacteria, TNRA functional bacteria and nitrification-denitrification inhibiting bacteria.

The application discloses a method for preparing sodium bicarbonate, co-producing potassium sulfate and ammonium chloride from sodium sulfate waste salt, which comprises the following steps: dissolving; purifying and carbonizing; separating and drying; secondary treatment; double decomposition and hydrolysis; and freezing and crystallizing. The process is short, the reaction condition is mild, no organic chemical raw material is selected, no high-temperature and high-pressure reaction is selected, the operation is easy to control, no flammable and explosive safety risk exists, all intermediate products are recycled, no sewage is generated, waste gas is discharged after being absorbed, a small amount of solid waste is from the purified sodium sulfate waste salt, no environmental protection pressure exists, no evaporation crystallization process is selected in the whole chemical reaction, energy consumption is low, secondary dissolution, low-temperature centrifugal separation and ammonium chloride hydrolysis technology are adopted, product conversion rate is high, equipment investment is small, economic benefits are good, and the method is suitable for industrialized production; the obtained product is stable in quality, the sodium sulfate waste salt is purified by using a chemical method, and the toxicity is removed, and the utilization problem of the by-produced industrial salt is effectively solved.

The preparation method comprises the following steps: firstly, adding PEG (Polyethylene Glycol) which accounts for 3% of the mass of an industrial byproduct magnesium chloride solution as a dispersing agent into the industrial byproduct magnesium chloride solution, stirring and dissolving under the ultrasonic action to obtain a mixed solution, then carrying out ultrasonic precipitation reaction, and carrying out ultrasonic precipitation reaction on the mixed solution at constant temperature to obtain the flame-retardant grade magnesium hydroxide. The preparation method comprises the following steps: under the combined action of stirring and ultrasound, dropwise adding ammonia water to carry out a precipitation reaction, then standing and curing the reacted slurry at a constant temperature, and finally carrying out solid-liquid separation, washing, drying and grinding to obtain a flame-retardant grade magnesium hydroxide product, the XRD pattern of the product is consistent with the characteristic diffraction peak of a standard magnesium hydroxide diffraction pattern, the diffraction peak is sharp and has no impurity peak, and the flame-retardant grade magnesium hydroxide product is obtained. The particle size D90 is less than or equal to 1.5 mu m, and the morphology is an irregular sheet structure which is uniformly dispersed. According to the invention, the industrial byproduct magnesium chloride is used as a raw material to prepare the flame-retardant grade magnesium hydroxide with high purity, superfine particle size and good dispersity, and high-valued utilization of the byproduct magnesium chloride is realized.

Harmless and useful chemical raw materials are obtained from wastewater generated during hydrogen production from secondary aluminum dross. [Solution] The present invention comprises the steps of: separating the gas phase and primary liquid phase of wastewater after hydrogen generation; dissolving carbon dioxide in the primary liquid phase until it reaches a predetermined pH value to obtain a secondary liquid phase; filtering the secondary liquid phase and dissolving carbon dioxide in the secondary liquid phase until it reaches a predetermined pH value to obtain a tertiary liquid phase; adding an extraction solvent to the tertiary liquid phase and dissolving carbon dioxide until it reaches a predetermined pH value to obtain a quaternary liquid phase separated into an organic phase and an inorganic phase by pressurized extraction; evaporating the water in the quaternary liquid phase of the inorganic phase; adding a solvent to the water in the quaternary liquid phase of the organic phase and performing back-extraction separation to obtain an inorganic liquid phase and an organic liquid phase, evaporating the water in the inorganic liquid phase while returning the organic liquid phase to the tertiary liquid phase.

The application relates to the field of pesticide environmental protection technology, and discloses a recovery method for byproduct ammonium chloride in the production process of kresoxim-methyl, which comprises a device main body, a distillation unit is fixedly arranged at the top end of the device main body, a water isolation unit is fixedly arranged at the bottom end of the distillation unit, a flow guide unit is fixedly arranged at the bottom end of the water isolation unit, a heating unit is fixedly arranged outside the flow guide unit, a heat dissipation unit is fixedly arranged at the bottom end of the heating unit, a filter unit is fixedly arranged inside the heat dissipation unit, a vibration unit is fixedly arranged in the filter unit, and a liquid storage bin is fixedly arranged at the bottom end of the filter unit. Through the working of the water isolation unit, small water droplets are wiped through the water isolation unit after being condensed at the bottom end steam inlet of the distiller in the distillation process, the backflow of the liquefied water droplets is prevented, the concentration of the bottom end liquid medicine is influenced, the liquid medicine can be treated at an accurate concentration, and the problem that the treatment result of the subsequent step is greatly deviated is avoided.

The invention relates to magnesium formate and a preparation method thereof, and the preparation method of the magnesium formate comprises the following steps: by taking bischofite and ammonium formate as raw materials, carrying out liquid phase reaction in a water phase medium to generate a mixture containing the magnesium formate and ammonium chloride; and solid magnesium formate is separated from the mixture. According to the invention, bischofite (MgCl2. 6H2O) is innovatively selected as a magnesium source, and the substance is a cheap by-product in industrial processes of extracting lithium from a salt lake, preparing salt from seawater and the like and is wide in source, so that the cost of raw materials is greatly reduced. Meanwhile, ammonium formate (NH4HCOO) is adopted to replace traditional formic acid or organic amine and is stable in property, safe and easy to decompose, use of strong corrosive acid or toxic solvent is avoided from the source, and the development trend of green chemistry is met.

This invention discloses a method for preparing fine copper powder by suspension reduction calcination of alkaline etching waste liquid. The method involves first adding magnesium chloride to the alkaline etching waste liquid to adjust the pH value, forming magnesium hydroxide precipitate and adsorbing impurity metals. Subsequently, under the influence of a dispersant or an ultrasonic system, the alkalinization reaction not only achieves the separation of copper, ammonia, and chlorine phases in the alkaline etching waste liquid but also allows for particle size control of copper oxide. Then, ammonia-containing gas recovered from the alkalinization method is used as a carrier gas and reducing agent to perform suspension reduction calcination on the fine copper oxide powder, ultimately yielding fine copper powder. This invention combines alkalinization with suspension calcination, opening up a new path for the clean and efficient recovery of copper from alkaline etching waste liquid using pyrometallurgical methods. By optimizing the alkalinization reaction and calcination conditions, fine copper powder with an average particle size of less than 10 μm is obtained. Compared with existing technologies, this invention has a shorter preparation cycle, higher resource utilization, safer process, and is more environmentally friendly, and is expected to solve the problem of large-scale production of fine copper powder.

The present application relates to a kind of HPF wet desulfurization by-product sulphur paste resource utilization method.The method is converted into high value-added fine chemicals taurine by the by-product sulphur paste of HPF wet desulfurization through superoxidation, substitution / imidization / oxidation and reduction step.The method solves the problem of by-product sulphur paste in the HPF wet desulfurization process of coking enterprise, compared with the existing treatment scheme of sulphur production by melting sulphur, the value of sulphur paste is greatly improved in the present application, high value taurine product widely used in medicine, food processing, feed and other industries is prepared, and ammonium chloride is produced, and the resource utilization of sulphur paste is realized.

The application discloses a crystal form regulator and application thereof in phosphogypsum byproduct of wet-process phosphoric acid, and belongs to the technical field of phosphorus chemical industry.The crystal form regulator is composed of a compound capable of forming aluminum-fluorine complex anions and iron-fluorine complex anions under acidic conditions.The crystal form regulator provided by the application can remove 100% of calcium ions in acidolysis liquid, and can also obtain phosphogypsum with good crystal morphology, and solves the problem that calcium ions in acidolysis liquid after decomposition of phosphate rock by nitric acid or hydrochloric acid cannot be completely precipitated and crystallized from the acid liquid.

An effective system and method for reducing the amount of carbon dioxide contained in a gas stream. The carbon dioxide absorption and mineralization unit is configured to produce at least one of carbonate and bicarbonate and ammonium chloride from carbon dioxide, an ammoniated solvent, and at least one metal chloride in the gas stream. The mineral separation unit is configured to separate carbonates and bicarbonates from ammonium chloride. The solvent regeneration unit is configured to use a catalyst to produce chlorine and ammonium hydroxide from ammonium chloride, heat, and oxygen.

This invention discloses a method for removing sulfate from deammoniation mother liquor and recovering ammonium chloride and sodium chloride through multi-effect evaporation crystallization separation, comprising the following steps: 1) collecting deammoniation mother liquor; 2) primary cold precipitation: the deammoniation mother liquor is transferred to an ammonium precipitation vessel at room temperature, cooled to 25-28℃ for cold precipitation crystallization, centrifuged to obtain agricultural ammonium chloride and mother liquor one; 3) secondary cold precipitation: mother liquor one is transferred to a cold precipitation crystallization vessel, sodium chloride is added, cooled to 20-23℃ for cold precipitation crystallization, centrifuged to obtain agricultural ammonium chloride and mother liquor two; 4) tertiary cold precipitation: mother liquor two is transferred to a strong cold precipitation vessel, cooled to 0-5℃ to crystallize sodium sulfate decahydrate, centrifuged to obtain sodium sulfate decahydrate and sodium chloride mother liquor; 5) the sodium chloride mother liquor is returned to the multi-effect evaporation system to recover sodium chloride. This invention uses a three-stage cold crystallization method to treat the deammoniation mother liquor, instead of directly returning it to the multi-effect evaporation system for recycling. This effectively avoids the vicious cycle of sulfate accumulation caused by the high sulfate content in the deammoniation mother liquor and repeated recycling, which leads to excessive sulfate content in the salt. This ensures that the sulfate content in the recovered industrial salt meets the standard of GB / T 5462-2015 for industrial salt, thus improving the product quality of industrial salt.

The invention relates to the technical field of inorganic chemical industry, and particularly discloses an improved sodium carbonate production process by an ammonia-soda process, which comprises the steps of carbonization alkali precipitation, ammonia-sodium separation, ammonia regeneration, magnesium extraction, calcium separation and the like. Meanwhile, resources such as water resources, ammonia and carbon dioxide are recycled, and the method is suitable for large-scale industrial soda ash production enterprises, meets the environment-friendly requirement and the efficient resource utilization requirement, and can be widely applied to the industrial fields of chemical engineering, building materials, food processing and the like which depend on soda ash and calcium-magnesium byproducts.

A process for extracting values from a leach residue from lithium extraction comprising: (a) mixing the leach residue with a chloride containing compound to form a first mixture; (b) calcining the first mixture to form a calcined mixture rich in calcium aluminosilicate and a hydrochloric acid containing off gas; (c) acid leaching the calcined mixture to form an aluminium bearing liquor and a silicon rich solid residue; (d) recovering values selected from the group consisting of aluminium compounds, silicon compounds and compounds containing silicon and aluminium.

The invention discloses a preparation method of superfine high-dispersion ferric hydroxide. Adding the ferric stearate-turpentine oil solution into the urea-polyethylene glycol solution, then adding a surfactant, keeping the temperature at 20-35 DEG C, and then stirring for 30-60 minutes at the stirring speed of 700-900 r / min to obtain an emulsion; heating the emulsion to the temperature of 95-105 DEG C, reacting for 3-4 hours at the temperature, and carrying out solid-liquid separation on the obtained material by adopting a centrifugal machine to obtain a solid and a liquid; adding alcohol into the solid for washing to obtain a washing solution and washing residues; and carrying out vacuum drying on the washing slag, carrying out airflow crushing, and sieving the crushed material to obtain the superfine high-dispersion ferric hydroxide. The method is simple in process, cyclic utilization of stearate radicals is achieved, resource utilization of chloride ions and ammonium ions is also achieved, and meanwhile the obtained ferric hydroxide is good in dispersity, small in particle and uniform in primary particle size.

The invention relates to a method for recycling ammonia-containing waste generated in the beryllium smelting process, and belongs to the technical field of wastewater and waste residue treatment and resource utilization. The method comprises the following steps: mixing the aluminum-ammonium-vanadium slag with beryllium washing wastewater, and transforming and dealuminizing the obtained aluminum-ammonium-vanadium-beryllium dissolved solution and a calcium-containing transformation agent to obtain aluminum-calcium slag and an aluminum-ammonium-vanadium purified solution; mixing the solution A with beryllium precipitation wastewater, and adding a calcium-containing alkaline substance to obtain an adjusted solution and gypsum slag; a decalcifying agent is added into the adjusted liquid for precipitation and decalcification, and decalcified residues and decalcified liquid are obtained; performing steam stripping ammonia distillation on the decalcified liquid to obtain ammonia water and ammonia distillation mother liquor; the solution A is an aluminum ammonium vanadium beryllium dissolving solution and / or an aluminum ammonium vanadium purifying solution; or mixing the aluminum ammonium vanadium purification liquid with beryllium precipitation wastewater, and carrying out evaporative crystallization to obtain the ammonium salt. According to the method, ammonia resources in the ammonia-containing waste generated by beryllium smelting are completely recycled, ammonium salt or ammonia water is prepared, and full cyclic utilization of ammonia nitrogen in the production process is achieved.

The application relates to a device and a method for capturing carbon dioxide in industrial waste gas and producing alkali, and belongs to the technical field of industrial waste gas treatment. The method for capturing carbon dioxide in industrial waste gas and producing alkali comprises the following steps: treating the industrial waste gas, capturing carbon dioxide CO2 and ammonia NH3 in the industrial waste gas; introducing the carbon dioxide CO2 and the ammonia NH3 in the industrial waste gas into a carbonization cleaning tower to generate ammonium carbonate (NH4)2CO3; in a reaction tower, ammonium carbonate (NH4)2CO3 and sodium chloride NaCl solution are reacted to generate sodium bicarbonate NaHCO3 and ammonium chloride NH4Cl, and the sodium bicarbonate NaHCO3 and the ammonium chloride NH4Cl are separated; the separated sodium bicarbonate NaHCO3 is steam calcined to generate Na2CO3 products, and the ammonium chloride NH4Cl is cooled and crystallized to generate NH4Cl products. The application can not only realize effective recovery and cyclic utilization of carbon dioxide, but also generate valuable chemical products through multiple reactions and resource conversion, thereby achieving a good balance between environmental protection and economic benefits.

A mixed metal air battery comprises an anode containing at least two metals, which enables the battery to utilize a wide range of metal combinations. The cathode is composed of hydrogen, oxygen, or a mixture of both, allowing for the battery. An electrolyte, in the form of a saturated alkali hydroxide solution, is used to facilitate the flow of ions between the anode and cathode. The electrolyte is in fluid communication with both the anode and cathode, ensuring efficient energy transfer. The battery's design enables it to utilize its anode and cathode materials to generate power, making it a promising alternative to traditional batteries. The combination of metals, gases, and electrolytes creates a unique and efficient energy storage system.