74 results about "Barium Ion" patented technology

The invention discloses a barium ion single-doped / double-doped brookite titanium dioxide nanorod catalyst as well as preparation and application, the catalyst synthesized by a thermal decomposition method comprises brookite phase titanium dioxide and doped barium ions, and the nanorod-shaped catalyst containing oxygen vacancy defects has the width of 4-6 nanometers and the length of 20-50 nanometers. The piezoelectric property of brookite titanium dioxide is induced through doping of barium ions, charge separation is promoted through a built-in electric field, meanwhile, oxygen vacancies are induced through a charge compensation mechanism, the piezoelectric catalysis and photocatalytic efficiency is promoted, and the problems mentioned in the background technology are solved.

The invention discloses a low-molecular scale-inhibiting thickening agent for deep coal rock gas reservoir fracturing and a preparation method of the thickening agent. The thickening agent comprises 25-40 parts of a hydrophilic monomer; 3-6 parts of a scale inhibition monomer; 3-5 parts of a functional monomer; 50 to 55 parts of deionized water; 0.5 to 0.8 part of an emulsifier; 0.15 part to 0.2 part of an initiator; 1.5 to 3 parts of hydrophobic monomer; and a proper amount of a pH regulator. According to the prepared scale inhibitor, the sand-carrying performance of fracturing fluid is met, meanwhile, groups with the scale inhibition function are innovatively introduced, during gel breaking, macromolecular chains are broken to release the scale inhibition groups, the scale inhibition groups are complexed with calcium and barium ions in formation water, scale deposition is inhibited, the effect and safety of fracturing construction can be further improved, and powerful guarantee is provided for efficient development of oil and gas fields.

The invention relates to an adsorbent based on an X molecular sieve and preparation and application thereof, and a preparation method of the adsorbent comprises the following steps: (1) mixing the X molecular sieve with a binder, molding and roasting to obtain a molded body; (2) treating the molded body obtained in the step (1) with an alkali solution to perform in-situ crystallization on the binder in the molded body to obtain a crystallized product; (3) carrying out partial barium ion exchange on the crystallized product obtained in the step (2) by using a barium salt solution, and drying to obtain a dried product; (4) carrying out ammonium ion exchange on the dried product obtained in the step (3) by using an ammonium salt solution, and roasting in a flowing atmosphere to obtain a roasted product; and (5) performing barium ion exchange and optional potassium ion exchange on the roasted product obtained in the step (4), and then drying to obtain the adsorbent. The adsorbent has at least two kinds of mesoporous channels with different apertures, has high barium ion exchange capacity, high adsorption capacity and compressive strength, and shows good adsorption selectivity and mass transfer performance when used for adsorption separation of p-xylene.

The invention relates to the technical field of organic high-molecular compounds, and discloses a carbon black-containing polyurethane-based foaming composite material and a preparation method thereof. The preparation method of the carbon black-containing polyurethane-based foaming composite material comprises the following steps: reacting p-aminobenzaldehyde with phosphoric acid to generate a phosphorus-containing compound, and introducing barium ions to obtain a modified phosphorus-containing compound; reacting the modified phosphorus-containing compound with the polyhydroxy esterification product to obtain flame-retardant polyol; modifying polyethylene glycol by a nitrogen-containing compound to obtain modified polyethylene glycol; the preparation method comprises the following steps: adding modified polyethylene glycol, flame-retardant polyol and modified carbon black into a polyurethane system to prepare a polyurethane foam material; introducing a silicon dioxide aerogel layer on the surface of the polyurethane foaming material to obtain a polyurethane-based foaming composite material containing carbon black; the carbon black-containing polyurethane-based foaming composite material disclosed by the invention has excellent flame retardant property, antistatic property and mechanical property.

The invention belongs to the technical field of crystals, and particularly relates to a calcium fluoride crystal doped with metal ions, a preparation method of the calcium fluoride crystal and application of the calcium fluoride crystal in optical elements. The crystal is a calcium fluoride crystal doped with magnesium ions and barium ions, and in the preparation method of the crystal, the magnesium ions and the barium ions for doping are pretreated and coated with a calcium fluoride precursor, and the calcium fluoride crystal which is uniform in doping and excellent in performance is prepared by combining a traditional Bridgman-Stockbarger method with a gradient doping process. The crystal is applied to an excimer laser lighting system, and after an optical element manufactured by the crystal is exposed to gamma radiation larger than 2.8 Mrads, the 515 / 380 nm transmittance loss ratio of the optical element is lower than 0.4.

The invention relates to the technical field of fuel cell new materials and new energy, in particular to an A-site high-entropy perovskite cathode material and a preparation method thereof. According to the technical scheme, the material comprises the following raw materials: Pr (NO3) 3.6 H2O, La (NO3) 3.6 H2O, Co (NO3) 2.6 H2O, CaCO3, BaCO3, SrCO3 and citric acid. The molar ratio of the praseodymium ions to the lanthanum ions to the cobalt ions to the calcium ions to the barium ions to the strontium ions to the citric acid is 1: (1-2). According to the invention, the A site of the perovskite material is doped with a plurality of elements, a rapid quenching preparation process is combined, the oxygen vacancy concentration and the proton conduction path can be optimized, the ORR activity and the conductivity can be improved, and excellent electrochemical performance and thermal stability can be shown through the synergistic effect of the plurality of elements and structural regulation and control, so that the performance of the cell can be improved.

The invention provides a barium slag harmless treatment method which comprises the following steps: mixing barium slag and desulfurized waste gypsum, adding water, beating into slurry, adding diluted industrial acid, stirring, acidifying, and heating, so that most of barium in the slurry forms BaSO4; adding a coupling agent, stirring, and carrying out coupling and competitive coordination reaction with free barium ions and barium salt in the product; adding a sulfate solution, and carrying out double decomposition reaction with the chelate barium to generate a non-toxic BaSO4 precipitate; and adding a ferrous sulfate solution to combine the rest of ferrous ions and sulfur ions in the product to form an iron sulfide precipitate, carrying out filter pressing to obtain filter residues with the water content of 20-30%, and drying. According to the method, toxic metal barium in the barium slag can be converted into nontoxic barium sulfate, and sulfur ions are converted into stable ferric sulfate, so that the barium ions, sulfide and corrosive pH value in the treated product all reach the national general solid waste first-class slag standard. The invention also provides an application of the barium slag treated by the method in building and building material industries.

The invention provides a positive electrode electrolyte, a preparation method of the positive electrode electrolyte and a flow battery, the positive electrode electrolyte comprises: an active material suitable for providing positive pentavalent vanadium ions; a dispersant; the cations comprise at least one of calcium ions, magnesium ions, sodium ions, barium ions, strontium ions and ammonium ions; and chloride ions. Therefore, the positive electrode electrolyte has relatively good stability, the solubility and the dispersity of positive pentavalent vanadium ions in the positive electrode electrolyte can be improved, precipitation is avoided, and the capacity and the energy density of the battery are further improved.

This invention relates to the field of high-purity material analysis technology, and discloses a method for simultaneously separating and enriching copper, cadmium, nickel, cobalt, zinc, lead, and barium in lithium carbonate. The steps are as follows: dissolving a lithium carbonate sample in nitric acid to obtain an acidified sample solution; adjusting the acidified sample solution to an alkaline pH range of 9.5-10.5 using an ammonia-ammonium acetate alkaline buffer solution; passing the alkaline solution through a solid-phase extraction column filled with iminodiacetic acid-type chelating resin, where copper, cadmium, nickel, cobalt, zinc, lead, and barium ions are selectively adsorbed onto the resin; and eluting the adsorbed heavy metal ions with acid to achieve separation and enrichment. This invention effectively overcomes the inhibition and interference of the lithium carbonate matrix on the detection of trace heavy metals, and in particular significantly improves the adsorption and recovery rate of elements such as barium. It achieves efficient separation and enrichment of multiple heavy metals in complex matrices, providing a reliable pretreatment solution for high-sensitivity and high-accuracy quality control analysis of lithium carbonate products.

The present invention relates to a method for dry mixing and grinding to synergistically dispose of gypsum slag and strontium / barium slag, and the specific steps are as follows: strontium slag and / or barium slag are mixed with gypsum slag, put into a ball mill for ball milling, and obtain a carbonate-sulfate complex. The present invention realizes the acid-base neutralization reaction of gypsum slag and barium / strontium slag in the absence of water, avoids the waste of resources and the release of harmful substances in the process of alkali washing of gypsum slag and acid washing of strontium-barium slag by traditional liquid phase precipitation method, and the obtained carbonate-sulfate complex has stable performance, especially acid rain resistance, and can greatly reduce the leaching of strontium / barium ions, solves the stacking problem of industrial by-product solid waste such as phosphogypsum and desulfurized gypsum and the disposal problem of hazardous waste such as strontium-barium slag, and the process is simple and easy to operate, and has strong practicality.

The invention provides an Eu < 3 + >-doped orange red luminescent material as well as a preparation method and application thereof, and belongs to the technical field of inorganic luminescent materials. The chemical formula of the orange red luminescent material is Ba4Sr0. 5Ca0. 5MgAl2W2O15: xEu < 3 + >, x is the mole number of barium ions Ba < 2 + > replaced by europium ions Eu < 3 + >, and x is larger than or equal to 0.04 and smaller than or equal to 0.32. The orange red luminescent material belongs to a typical cubic perovskite structure, can be excited by ultraviolet-near ultraviolet with a wavelength interval of 240-430 nanometers, and correspondingly emits a sharp linear spectrum with a wavelength peak value at 587 nanometers. The orange red luminescent color is pure in chromaticity, and can be packaged with ultraviolet and near ultraviolet semiconductor chips to prepare orange red or polychromatic light LED lighting devices. The fluorescent powder is synthesized by using a sol-gel method, a single cubic perovskite structure can be ensured, and the preparation method has the advantages of easily available raw materials, good repeatability, low cost and no pollution.

A coated nanocluster (10) comprises: a core (20) including an aggregate of magnesium oxide particles; and a shell (30) covering the core (20). The shell (30) has a coating layer (31) containing at least one of a nitrate and a nitrite, and carbonate particles (32) dispersed in the coating layer (31). At least one of the nitrate and the nitrite contains an alkali metal ion. The carbonate particles (32) contain at least one selected from a calcium ion, a strontium ion, and a barium ion. The molar ratio of the carbonate particles (32) constituting the shell (30) to the magnesium oxide particles constituting the core (20) is more than 0.005 and 0.015 or less.

The application belongs to the technical field of ion detection, and particularly relates to a furan fused derivative material and application thereof in barium ion detection. In order to solve the problems of the prior art, such as complicated and complex detection, high cost, poor detection sensitivity, and unsuitability for real-time analysis, etc. in the detection of barium ions, the application provides a furan fused derivative material. The furan fused derivative material is used as an active layer of an OECT, a designed and synthesized azacrown-6 crown ether material is modified above the active layer, selectivity is provided by the azacrown ether, a full-plane barium ion sensor is prepared, and the purpose of real-time detection of barium ion concentration with rapidity, accuracy and high sensitivity can be achieved. The detection limit is as low as 10nM, which is superior to most of the currently reported barium ion sensors, and greatly meets the detection requirements of environmental water samples.

The present invention relates to a device for electro-slowly releasing sulfate radicals in wastewater removal, which comprises a sulfate radical precipitation unit and a precipitation removal unit connected in sequence, and a sulfate radical detection unit arranged on the upstream pipeline communicating with the water inlet of the sulfate radical precipitation unit; the sulfate radical detection unit is used for detecting the concentration of sulfate ions contained in the raw water before entering the sulfate radical precipitation unit; the sulfate radical precipitation unit is used for releasing barium ions to the raw water according to the detected sulfate ion concentration, so that the barium ions react with the sulfate ions to generate barium sulfate, and the sulfate radical precipitation product water containing barium sulfate is obtained; the precipitation removal unit is used for removing the barium sulfate contained in the sulfate radical precipitation product water to obtain the precipitation removal product water. The present invention can accurately control the release rate of barium ions according to the concentration of sulfate radicals in the water body, and can recover the excessive barium ions in the water, overcoming the secondary pollution caused by the inability to accurately control the dosage of barium ions in the traditional precipitation method, and reducing the amount of sludge generated at the same time.

The invention relates to the field of photovoltaic technology, and discloses a photovoltaic cell gap reflective film and a preparation method and application thereof. The preparation method comprises the following steps: mixing a metal complexing agent and a PET material according to a mass ratio of (1-5): 100, and carrying out melt extrusion granulation to obtain PET master batches; the preparation method comprises the following steps: carrying out three-layer melt co-extrusion, two-way stretching and sizing on PET master batches, bonding resin and ionic polymer particles in specific parts by weight to obtain a base film; immersing the surface of the PET layer of the base film into a barium salt solution, adjusting the pH value of the solution system to 7-11, and stirring to enable barium ions to be fully complexed with the metal complexing agent on the surface of the PET layer; and dropwise adding a sulfate solution into the solution system, and maintaining stirring, so that the white BaSO4 layer is uniformly precipitated on the surface of the PET layer, and the gap reflective film is prepared. According to the method, the working procedures of coating, EVA film spraying, aluminum sputtering and the like are omitted, the efficiency is higher, the cost is lower, the reflectivity of the gap reflective film is high, the interlayer cohesiveness is higher, the service life of the gap reflective film is prolonged, and the reflection effect of the gap reflective film is improved.

The present invention discloses an online fully automatic calcium, magnesium, strontium and barium ion concentration analyzer, which relates to the field of ion concentration analysis and includes a support device, an opening and closing door, a variable sampling device, a liquid dropping device and a comparison device. The liquid dropping device drives the suspension ball to rise through the change of the liquid level. The suspension ball drives the first screw rod to lift upward through the limit bracket. The first screw rod drives the flexible elbow to bend and fold through the control bracket, thereby restricting the flow rate at the flexible elbow. During the folding process of the flexible elbow, the acute angle formed by the rigid straight pipe and the horizontal plane will further become smaller to restrict the flow rate at the rigid straight pipe. The electric push rod on the side of the electric clamping plate drives the electric clamping plate to move horizontally, so that the electric clamping plate is inserted into the liquid dropping card slot, thereby realizing the locking function of the control bracket. At the same time, a pressure sensor is arranged at the upper end of the first screw rod. When the upper end of the first screw rod contacts the lower end of the control bracket, the pressure sensor sends out a signal to realize the control of the liquid dropping time.

A new antifouling developing coating material, and a preparation method therefor and the use thereof. In the antifouling developing coating material, barium ions are combined with the sulfonate anions, and the barium ions are introduced into the structure of a modified choline phosphate polymer, which is modified with siloxane and sulfonate anions, thereby allowing the material to have combined antifouling and developing functions; therefore, the stability of the material is ensured, and the material has wide application prospects in the field of medical imaging.

The invention discloses an online full-automatic calcium, magnesium, strontium and barium ion concentration analyzer, which relates to the field of ion concentration analysis and comprises a supporting device, an opening and closing door, a variable sampling device, a liquid dropping device and a comparison device. According to the liquid dropping device, the suspension ball is driven to rise through liquid level changes, the suspension ball drives the first screw rod to rise upwards through the limiting support, the first screw rod drives the flexible bent connector to be bent and folded through the control support, and therefore the flow at the position of the flexible bent connector is limited; and the acute angle between the rigid straight pipe and the horizontal plane is further reduced to limit the flow velocity at the rigid straight pipe. An electric push rod on the side face of the electric clamping plate drives the electric clamping plate to move transversely, so that the electric clamping plate is inserted into a liquid dropping clamping groove, and therefore the control support is locked, meanwhile, a pressure sensor is arranged at the upper end of a first screw rod, and when the upper end of the first screw rod makes contact with the lower end of the control support, the pressure sensor sends out a signal; therefore, the liquid dropping time is controlled.

A trapped ion system (100) for quantum computing configured to encode a first qubit in first and second metastable hyperfine states of a barium ion (105). 5

The invention discloses a method for extracting trace radium in uranium tailings. The method comprises the steps of tailings pretreatment, leaching, coprecipitation, dissolution and separation. According to the method, the characteristic that phosphate is difficult to dissolve is utilized, ions such as UO2 < 2 + >, Fe < 3 + >, Al < 3 + >, Ca < 2 + > and Ba < 2 + > existing in the uranium tailing leaching solution and Ra < 2 + > generate phosphate precipitates, synchronous enrichment of radium is achieved, after the radium is dissolved through diluted hydrochloric acid, the coexisting ions are separated and removed by utilizing the property difference between the coexisting ions and the Ra < 2 + >, and the radium-containing solution is obtained through purification. Compared with the prior art, the method has the advantages that the carbonate conversion step of sulfate is omitted, so that CO2 aerosol and radium-containing aerosol pollution generated by carbonate conversion is eliminated; the separation process time is shortened, and the operation difficulty is greatly reduced; barium ions are not additionally introduced in the whole process, and competitive ions similar to radium in property are greatly reduced; and the recovery rate of radium is improved by optimizing the leaching process.

A system and method of propane removal in a pre-purification unit (PPU) for an air separation unit is provided. The disclosed system and method involves the use of a capping layer of zeolite exchanged with moderate amounts of barium cations, preferably a barium exchange level of 50% on an equivalent basis. This reduced or moderate level of barium exchange achieves the required propane removal but with reduced costs and reduced environmental hazards compared to prior art solutions using highly exchanged barium levels. The barium containing zeolite for the capping layer is preferably in an agglomerated form, including beads and / or pellets, having an average particle size in a range of about 1 mm to 5 mm.

The invention discloses an environment-friendly flexible wearable anti-radiation composite material and a preparation method thereof. The anti-radiation composite material comprises: a support layer made of a high polymer material; the ionizing radiation shielding layer A is arranged on the supporting layer in a stacked mode, and the ionizing radiation shielding layer A is prepared from, by weight, a polymer base material, anti-radiation composite powder, a binding agent and an auxiliary agent; the flexible ionizing radiation shielding layer B is arranged on the ionizing radiation shielding layer A in a stacked mode, and the flexible ionizing radiation shielding layer B is a fiber material containing barium ions obtained through sulfonation reaction and ion exchange reaction. The anti-radiation composite material provided by the invention is flexible, non-toxic and wearable, has efficient ionizing radiation shielding performance, and can be used for manufacturing protective clothing, protective tents and the like.

The present invention relates to the technical field of scale and corrosion inhibitors, and discloses a preparation process of a neutral amino acid-based scale and corrosion inhibitor. The present invention reacts 3,5-dihydroxybenzaldehyde, taurine, epichlorohydrin, and N,N,N',N'-tetramethylethylenediamine to obtain a scale and corrosion inhibitor. The sulfonate and hydroxyl groups contained in the scale and corrosion inhibitor form stable chelates with barium ions and strontium ions, which can prevent the barium ions and strontium ions from combining with anions such as sulfate to form insoluble precipitates such as barium sulfate and strontium sulfate, thereby achieving excellent scale inhibition performance. The scale and corrosion inhibitor contains multiple active coordination centers of quaternary ammonium salt cations, sulfonate, and hydroxyl groups, which interact with the surface of a steel sheet to form a tight and firm protective film on the surface, preventing corrosive media such as hydrochloric acid from contacting the steel sheet, achieving excellent anti-corrosion and corrosion inhibition performance at high temperatures, and has good practical applications in oil field water injection and oil production.

A system and method of propane removal in a pre-purification unit (PPU) for an air separation unit is provided. The disclosed system and method involves the use of a capping layer of zeolite exchanged with moderate amounts of barium cations, preferably a barium exchange level of 50% on an equivalent basis. This reduced or moderate level of barium exchange achieves the required propane removal but with reduced costs and reduced environmental hazards compared to prior art solutions using highly exchanged barium levels. The barium containing zeolite for the capping layer is preferably in an agglomerated form, including beads and / or pellets, having an average particle size in a range of about 1 mm to 5 mm.

The invention discloses a phosphate radical-based multi-metal oxide radiation protection paste as well as a preparation method and application thereof. The radiation protection paste is a shear thinning paste formed by uniformly dispersing a nano-scale multi-metal phosphate radiation protection filler in a cross-linked polymer hydrogel matrix, the nano-scale multi-metal phosphate anti-radiation filler is nano-scale multi-metal phosphate prepared from phosphate ions, bismuth ions, barium ions and zirconium ions through an in-situ coordination precipitation method, and the molar ratio of the bismuth ions to the barium ions to the zirconium ions is (3-4): (1.5-2.5): 1. The mass of the nanoscale multi-metal phosphate accounts for 35%-65% of the total mass of the multi-metal oxide radiation protection paste; the cross-linked polymer hydrogel matrix is calcium ion cross-linked alginate hydrogel. The radiation protection paste has the remarkable advantages of being convenient to construct, free of lead or low in toxicity, high in adaptability to complex structures and the like, and an efficient, flexible and environment-friendly new scheme is provided for radiation protection.

The application provides a method for rapid detection of barium ions in oil-based drilling fluid and a method for preventing drill pipe blockage, the method for rapid detection of barium ions comprising the steps of: mixing an oil-based drilling fluid sample and a demulsification solvent, stirring uniformly to obtain a mixed solution; mixing the mixed solution with distilled water, stirring and then standing until oil and water are separated; filtering the lower water phase to obtain a colorless and clear liquid, adding a sodium chromate solution, and observing whether a yellow precipitate appears, if a yellow precipitate appears, it indicates that the oil-based drilling fluid contains barium ions, and if no yellow precipitate appears, it indicates that the oil-based drilling fluid does not contain barium ions. The method for preventing drill pipe blockage comprises: taking an oil-based drilling fluid sample to be detected to detect whether it contains barium ions; and taking preventive measures in advance to prevent the internal circulation channel of the drill pipe from being blocked in the case that it is determined that the oil-based drilling fluid contains barium ions. The application has the advantages of simple and rapid operation, low cost, and the result can be obtained within 30 min without special instruments, equipment and medicines.

The application discloses a microwave dielectric ceramic material, a preparation method and application thereof. The microwave dielectric ceramic material comprises a main crystal phase and a doping cation. The chemical formula of the main crystal phase is Mg(Ti2O5) x -Mg(Al2O4) (1‑x) wherein 0.17<=x<=0.26; the doping cation comprises at least one of barium ions, calcium ions, zinc ions, lanthanum ions, niobium ions and bismuth ions; the barium ions and the calcium ions replace magnesium ions in the main crystal phase, and the zinc ions, the lanthanum ions, the niobium ions and the bismuth ions replace magnesium ions, aluminum ions or titanium ions in the main crystal phase; the magnesium ions, the aluminum ions and the titanium ions in the main crystal phase are replaced by the barium ions, the calcium ions, the zinc ions, the lanthanum ions, the niobium ions and the bismuth ions, so that the crystal lattice in the main crystal phase is distorted, the final synthesis temperature is reduced, the dielectric constant and the volume temperature coefficient are adjusted, the dielectric loss is reduced, and the comprehensive performance of the microwave dielectric ceramic material is improved.

The invention relates to the technical field of blocking removers, and discloses a polymer composite blocking remover for an oil field and a preparation method thereof.A methacrylate-based phthalic acid monomer is subjected to a self-polymerization reaction under the initiation action of potassium persulfate to obtain a sodium phthalate polymer, and the sodium phthalate polymer is compounded with chelating agents such as ethylene diamine tetraacetic acid and the like to obtain the polymer composite blocking remover for the oil field. The polymer composite blocking remover is obtained. The sodium o-benzoate polymer contains a sodium phthalate group and has higher chelation adsorption capacity to barium ions, and meanwhile, the sodium o-benzoate polymer contains a nitrogen-containing urea group and also has certain coordination capacity to the barium ions, so that the blocking remover shows a very high corrosion rate to barium sulfate; and the sodium o-benzoate polymer is not easy to thermally decompose at a high temperature, still has a very high corrosion rate on barium sulfate, and is suitable for the field of blockage removal of barium scale in a high-temperature reservoir.

The invention belongs to the technical field of lithium ion battery materials, and discloses a method for preparing battery-grade lithium fluoride from lithium sulfate brine. The method comprises the following preparation steps: (1) preparing lithium oxalate: putting lithium sulfate brine into a reaction kettle, then adding barium oxalate for reaction, filtering, taking filtrate, concentrating, cooling and crystallizing to obtain lithium oxalate; (2) removing barium from lithium oxalate: dissolving lithium oxalate with deionized water, and performing deep barium removal in a resin impurity removal manner to ensure that the concentration of barium ions is less than or equal to 5ppm; and (3) charging reaction: adding the barium-removed lithium oxalate solution into an ammonium fluoride solution, stirring to react, filtering after the reaction is completed, taking a solid phase, washing, and drying to obtain the battery-grade lithium fluoride. According to the method disclosed by the invention, the battery-grade lithium fluoride can be prepared by adopting the lithium sulfate brine with high sodium level, the technological process is simple and short, the loss of lithium is reduced, and the raw material cost in the whole process is low.

This application discloses a continuous preparation method and system for nano-barium sulfate based on waste acid resource utilization and internal circulation. It belongs to the interdisciplinary technical field of industrial waste resource utilization and advanced inorganic nanomaterial preparation. It aims to solve the technical bottlenecks of traditional processes for preparing barium sulfate, such as wide particle size distribution, low purity, pollution caused by the formation of soluble barium nitrate from nitrate ions, and low resource utilization. The method uses industrial waste acid containing sulfuric acid and nitric acid and a barium source as raw materials. The two are fed into a dual-channel centrifugal atomizer for atomization, mixing and reaction. The molar ratio of sulfate ions to barium ions is controlled. After separation and washing of the reaction products, most of the acidic washing liquid is recycled for slurry preparation, a small part is bypassed for purification, and CO2 is recovered and recycled. Finally, the product is dried to obtain nano-barium sulfate powder.