46 results about "Barium Ion" patented technology

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 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.

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 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.

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 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.

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.

A method for removing sulfates from seawater by immersing a barium adsorbent into produced water to adsorb the barium ions from the produced water. The adsorbent is combined with an acidic solution that pulls the barium ions into the acidic solution. The acidic solution containing barium ions is combined with seawater to precipitate the sulfate as barium sulfate (BaSO4).

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.

A method for utilising a trapped ion, e.g. a barium ion, for a quantum computing system, the trapped ion having an encoded quantum information unit, e.g. an encoded qubit, configurable to be in any one of a plurality of quantum states, the method comprising: a quantum operation process 150 that adjusts the quantum state of the quantum information unit, comprising the steps of: performing a check observation 110 of the trapped ion; and raising an error flag 112 in response to detecting the quantum information unit; and performing the corrective action 114 in response to the error flag. Quantum states comprise: an error state, a ground state; a metastable state manifold. The error state may comprise a loss state of the ion escaping entrapment. The check observation can be a fluorescence readout check and may comprise decay ground check. The quantum operation may comprise laser cooling. The method addresses errors in preparation and measurement of metastable qubits.

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 present invention relates to an agglomerated zeolite adsorbent based on faujasite X zeolite crystals having a controlled Si / Al molar ratio and ion-exchanged with barium, or based on faujasite X zeolite having a controlled Si / Al molar ratio and ion-exchanged with barium and potassium. The present invention also relates to the use of the adsorbent in the separation of sugars, polyhydric alcohols, substituted toluene isomers, cresols, or for the recovery of very high purity para-xylene, and to a separation process for separating xylenes implementing the use of the adsorbent.

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.

The invention relates to the technical field of barium slag innocent treatment, in particular to a barium slag innocent treatment method, innocent barium slag and application of the barium slag innocent treatment method. The technology of barium slag crushing, diluted hydrochloric acid or dilute nitric acid pretreatment, filtering, filter residue acidification and filtrate oxidation precipitation and mixed aging is adopted, and the situation that due to the fact that barium slag particles are ground finely, energy consumption is high is avoided; ca, Mg, Al and other elements existing in the barium slag particles can be pre-dissolved to form porous barium slag particles, sulfate radicals, phosphate radicals and other components in the acid curing agent can permeate into the barium slag particles, the curing effect of leachable barium ions in the barium slag particles is improved, meanwhile, an oxidizing agent is introduced to oxidize S < 2->, and the effect of leaching barium ions in the barium slag particles is improved. S2-is directly converted into SO4 < 2-> to solidify and precipitate barium ions in the filtrate, and then precipitation slag and acidizing slag are directly mixed and aged to obtain the harmless barium slag, so that the leaching rates of Ba < 2 + > and S2-in the harmless barium slag are effectively reduced, the resource utilization way of the harmless barium slag is widened, and the environmental risk is reduced.

The present invention discloses a method for purifying succinic acid and reducing the sulfate content in the acid, comprising the steps of dissolution, flocculation adsorption, salting-out crystallization, re-dissolution, adsorption on a basic anion exchange resin, and crystallization. Compared with the prior art, the technical solution of the present invention achieves a product purity greater than 99.8%, a sulfate ion content less than 0.005%, a high overall yield, high product purity, a simple technical solution, and no need for heavy metal barium ions. The resulting product can be used in most application fields and has broad market application value.

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.

To provide an anion exchange membrane-type water electrolysis anode catalyst with excellent alkali resistance, an anion exchange membrane-type water electrolysis anode catalyst layer, an anion exchange membrane-type water electrolytic cell, and a water electrolytic cell stack.SOLUTION: Provided are an anion exchange membrane-type water electrolysis anode catalyst and the application thereof, which has a perovskite-type structure including at least one kind of ions selected from a group consisting of calcium ions, strontium ions, and barium ions as A-site ion, and tetravalent metal ions and iridium ions as B-site ion. The ratio of the molar concentration of the iridium ions to the total molar concentration of all the metal ions included in the B-site ion is 0.30 or more and 0.57 or less. In an alkaline solution, an oxygen evolution reaction occurs according to the following expression: 4OH- → 2H2O + O2 + 4e- (I).SELECTED DRAWING: None