22 results about "Barium Ion" patented technology

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 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.

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.

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.

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.

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.

The invention discloses a method for innocent treatment of manganese slag and barium slag through alternate washing, and belongs to the technical field of industrial dangerous solid waste treatment and recycling, and the method comprises the following steps: alternately washing the manganese slag and the barium slag with water for more than three times to realize innocent treatment of the manganese slag and the barium slag. According to the method, water is used as a carrier, soluble ions in one kind of waste are carried into another kind of waste, mutual solidification is achieved through a precipitation reaction, and therefore the leaching toxicity of the barium ions in the barium slag and the content of soluble manganese in the manganese slag are reduced at the same time, and cyclic utilization of washing water is achieved.

The invention relates to the technical field of coal gasification water treatment, and discloses a method for rapidly determining the content of sulfate radicals in a grey water dispersing agent. The method comprises the following steps: diluting a grey water dispersing agent to a required concentration, mixing a diluted to-be-detected sample solution with a hydrochloric acid solution for reaction, and eliminating the interference of carbonate and phosphate radicals in the dispersing agent; then mixing and reacting with an excessive barium chloride solution, so that sulfate radicals in the dispersing agent are completely converted into a barium sulfate indissolvable precipitate; then adding an ethylene diamine tetraacetic acid disodium magnesium solution, enhancing the terminal color mutation under the chrome black T indicator system through the replacement effect of excess barium ions and magnesium, and improving the terminal judgment sensitivity; in addition, the method further analyzes the total amount of calcium and magnesium in the dispersant, eliminates interference of calcium and magnesium ions, and ensures the accuracy of a test result. The method is simple to operate, wide in application range, small in analysis error, high in environmental friendliness and wide in application prospect in the field of coal gasification water treatment, and the use of a large amount of alcohol ketone solvents is avoided.

The invention relates to the technical field of building materials, in particular to a durable building material for resource utilization of solid waste barium slag and a preparation method of the durable building material. The material is composed of Portland cement, mineral powder, fly ash, stabilized barium slag, aggregate, a water reducing agent and the like. The barium slag modifier which is synthesized through three-step reaction and integrates the functions of chelation, permeation and oxidation has a synergistic effect with a sulfate radical slow-release agent and a trapping agent, soluble barium ions and sulfides in barium slag are converted into stable barium sulfate, and free sulfate radicals are removed. The stabilized barium slag serves as inert functional powder, and after the stabilized barium slag is compounded with other raw materials, the effects of micro aggregate filling and interface strengthening are achieved. According to the method, efficient detoxification and bulk digestion of the barium slag are achieved, the obtained material is low in leaching toxicity and good in mechanical property, has excellent sulfate corrosion resistance, volume stability and durability, is adaptive to existing production equipment, does not need to be greatly improved, conforms to the green and low-carbon development concept, and provides a reliable way for solid waste recycling.

The invention discloses a preparation method of BaSO4 with a hollow strip-shaped structure, and relates to the technical field of multipurpose and multifunctional nano metal compound materials. The preparation method comprises the following steps: mixing a barium ion compound with a nano carbon colloid particle solution or carbon tar, adding an acid to maintain the pH value of the system to be less than 7, adding a surfactant, gradually dropwise adding a sodium sulfate aqueous solution under the condition of continuous stirring, reacting to form floccules or precipitates, and centrifuging to prepare the hollow strip-shaped structure BaSO4. According to the invention, the nanometer carbon colloid particles or carbon tar is used as a barium ion carrier, polyvinylpyrrolidone is used as a surfactant, stable and rapid molding of the BaSO4 nanometer material is promoted, and the prepared BaSO4 material has the advantages of significant hollow nanometer structure, good compatibility and the like, can be widely used in the fields of medical treatment, nuclear building, industrial papermaking and the like, and has wide application prospects. Great development prospects are realized.

There is provided a production method for a microcapsule in which cells are encapsulated with alginic acid and a polycation, the method including dropwise adding a cell suspension containing cells and alginic acid into a calcium ion-containing solution to obtain a liquid droplet in which the cells are encapsulated in alginic acid, and immersing the liquid droplet in a coating liquid containing a polycation, to obtain the microcapsule, where the coating liquid contains a calcium ion or a barium ion at a concentration of 0.1 mM or more and 50.0 mM or less. According to the production method of the present invention, it is possible to produce a microcapsule having a uniform shape and particle size.

The application relates to the technical field of barium element utilization in barite minerals, and specifically discloses a method for improving the utilization efficiency of barium elements in barite minerals. The method comprises the following steps: mixing crushed barite and crushed coal in a weight ratio of 1:(0.2-0.25), and then extruding and balling to obtain pellets, wherein the particle size of the pellets is 20-80 mm; the pellets are subjected to microwave roasting and crushing, the crushing product is subjected to water leaching to obtain a barium sulfide solution, and the barium residue is subjected to acid liquid dissolution and leaching, and then subjected to solid-liquid separation to obtain a barium ion solution and a residue stone. The method can significantly improve the yield of water-soluble BaS and the comprehensive utilization rate of barium elements in barite, and the process is environmentally friendly, low in pollution and high in production efficiency.

The invention discloses a ceramic-based low-temperature co-fired ceramic material and a preparation method thereof, and belongs to the field of low-temperature co-fired ceramics. The ceramic-based low-temperature co-fired ceramic material is prepared from the following raw materials: ceramic-based composite powder and a processing aid, the ceramic-based composite powder is prepared from the following components in percentage by mass: 90 to 98 percent of CaAl2B2O7 powder and 2 to 10 percent of lithium borosilicate barium glass powder. The low-intrinsic-loss CaAl2B2O7 powder crystal phase serves as a base material, has a low dielectric constant and can promote rearrangement and densification of particles in the sintering process in cooperation with the lithium borosilicate barium glass powder, the formed liquid glass phase wraps crystal grains, it is ensured that the crystal grains of the CaAl2B2O7 powder form a continuous skeleton structure, and dielectric loss is reduced. And barium ions in the lithium borosilicate barium glass powder can inhibit migration of lithium ions, reduce dielectric loss and improve overall heat-resistant stability, so that the low-temperature co-fired ceramic material with low dielectric constant and low dielectric loss is obtained.

The invention provides a method for recycling rare earth and aluminum elements from southern ionic rare earth ore. The method comprises the following steps: (1) mixing southern ionic rare earth ore with water, adding concentrated hydrochloric acid for leaching, and then carrying out first solid-liquid separation to obtain a first liquid phase containing aluminum ions, rare earth ions and impurity ions and a first solid phase containing slag; the impurity ions comprise one or more of iron ions, magnesium ions, barium ions and calcium ions; (2) mixing and reacting the first liquid phase with alkali metal sulfate, and then carrying out second solid-liquid separation to obtain a second liquid phase containing aluminum ions and a second solid phase containing rare earth metal double salt; and (3) respectively converting the aluminum ions in the second liquid phase and the rare earth metal double salt in the second solid phase into aluminum hydroxide precipitates and rare earth hydroxides, and then dissolving the aluminum hydroxide precipitates and the rare earth hydroxides with acid to obtain a corresponding aluminum salt solution and a corresponding rare earth salt solution. According to the method, high-value utilization of rare earth and non-rare earth can be achieved at the same time.

This invention discloses a barium titanate-based piezoelectric ceramic with high temperature stability and its preparation method. The ceramic has the following characteristics: Ba 1‑x Ca x Ti 1‑y Zr y O3, 0.17≤x≤0.19, 0.11≤y≤0.13. The ceramic uses BaTiO3 as the basic research system. By replacing some barium ions with calcium ions and some titanium ions with zirconium ions, the phase transition temperature of barium titanate is adjusted, so that it maintains stable piezoelectric properties over a wider temperature range, i.e., it has high temperature stability. Furthermore, by doping with calcium and zirconium sources to change the morphology and distribution of electric domains, the piezoelectric coefficient of the ceramic is increased.

The present invention provides a method of manufacturing a catalyst article, the method comprising:providing a substrate;providing a washcoat slurry, the washcoat slurry comprising a solvent, a support material, platinum group metal (PGM) ions, barium ions and a chelating agent of formula (1);coating the substrate with the washcoat slurry to provide a coated substrate; andheating the coated substrate to calcine the washcoat slurry;wherein formula (1) is defined by:wherein R is CH2OH, COOH orwherein R′ is CH2OH or COOH.

This invention relates to the field of ferroelectric thin film materials technology, specifically to a ceramic-based high-energy-density ferroelectric thin film material and its preparation method, comprising the following steps: S1: premix preparation, S2: substrate preparation, S3: finished product preparation. The premix is ​​spin-coated and cured on the substrate surface to obtain the ceramic-based high-energy-density ferroelectric thin film material. In this invention, zinc and tin elements are introduced in the preparation of additives. Zinc can improve the insulation of the thin film material. The addition of tetrabutyl titanate and barium nitrate components in the mixture allows the titanium and barium elements contained therein to form a regular crystal structure inside the film, enabling it to orderly accommodate charges and avoid chaotic charge loss. Utilizing the larger ionic radius of barium ions, the crystal lattice can be expanded to form a stable interlayer structure, which can reduce charge loss and improve energy storage efficiency.

The invention relates to the field of polypropylene materials, and discloses a macromolecular nucleating agent with alpha / beta double functions and a preparation method and application thereof, the preparation method comprises the following steps: adding norbornene dicarboxylic acid into a tetrahydrofuran solution, then adding a Grubbs three-generation catalyst to polymerize norbornene dicarboxylic acid, and volatilizing THF to obtain polynorbornene dicarboxylic acid powder; the preparation method comprises the following steps: dispersing polynorbornene dicarboxylic acid powder in ionized water, dropwise adding a sodium hydroxide aqueous solution, and finally dropwise adding an aqueous solution containing at least one of zinc, calcium and barium ions to generate the macromolecular nucleating agent with alpha / beta double functions on polypropylene. The prepared high-molecular nucleating agent can greatly improve the toughness of polypropylene under the condition of not reducing the strength and modulus of the polypropylene, realizes rigid-tough balance of the polypropylene, and is expected to widen the application field of the polypropylene. The process of direct blending and normal-temperature polymerization is adopted during modification preparation of the polypropylene composite material, the operation is simple and convenient, the controllability is strong, and industrial large-scale production is easy.

This invention belongs to the field of solid waste recycling technology, specifically relating to a barium slag-based cementitious material, its preparation method, and its application. The cementitious material comprises the following raw materials in parts by weight: 400-450 parts barium slag, 80-130 parts blast furnace slag, 125-175 parts waste incineration fly ash, 70-100 parts desulfurized gypsum, 20-35 parts modified porous fiber, and 10-15 parts activated carbon. The modified porous fiber is prepared by a method including the following steps: 1) blending polyolefin, mesoporous molecular sieve, and pore-forming agent, extruding and granulating, melt spinning, removing the pore-forming agent, and plasma treatment to obtain porous fiber; 2) modifying the surface of the porous fiber with an isocyanate-based silane coupling agent, and then grafting hydroxyl polyacid compounds to obtain modified porous fiber. Activated carbon and mesoporous molecular sieves can enhance the adsorption and retention capacity of heavy metal ions; modified porous fibers can chelate barium ions and other heavy metal ions, and can also improve the dispersibility of modified porous fibers in cementitious materials, thereby improving mechanical properties and synergistically enhancing the long-term environmental aging resistance of activated carbon.