109 results about "Barium dichloride" patented technology

The invention relates to the technical field of cables, and provides a flexible corrosion-resistant robot cable, which sequentially comprises a cable core, a shielding layer, an inner sheath layer and an outer sheath layer from inside to outside, and is characterized in that the cable core sequentially comprises a conductor and an insulating layer from inside to outside; the outer sheath layer comprises the following raw material components in parts by weight: 60-70 parts of high-density polyethylene, 15-25 parts of an ethylene-tetrafluoroethylene copolymer, 0.5-1.5 parts of an antioxidant, 1-3 parts of a plasticizer, 8-12 parts of a flame retardant, 10-20 parts of polyethylene glycol diacrylate composite barium sulfate and 1-2 parts of a lubricant; the polyethylene glycol diacrylate composite barium sulfate is prepared from the following raw materials: polyethylene glycol diacrylate, barium chloride and sodium sulfate. According to the technical scheme, the problem of poor corrosion resistance of the robot cable in the prior art is solved.

The invention relates to the technical field of barium chloride production and preparation, in particular to a purification method of electronic-grade barium chloride, which comprises the following steps: S1, washing witherite tailing barium slag with hydrochloric acid to obtain barium-containing filter residue; s2, mixing the barium-containing filter residues with hydrochloric acid, and performing leaching treatment to obtain a crude barium chloride product; s3, dispersing the barium chloride crude product in water, adjusting the pH value of the solution, adding an impurity removal agent, carrying out ultrasonic-assisted segmented temperature control treatment, and filtering to obtain a barium chloride solution; and S4, adding a crystal form control agent into the barium chloride solution, and performing programmed cooling crystallization under the action of a low-intensity direct-current electric field to obtain the electronic-grade barium chloride. According to the technical scheme, efficient conversion and precise impurity separation of the barium slag difficult to treat are achieved, the technical problems that in a traditional method, the barium recovery rate is low, impurity removal is difficult, and the product purity is unstable are solved, and the resource utilization rate of barium is remarkably increased.

The invention discloses a ferrous sulfide-barium titanate wave-absorbing material and a preparation method thereof, and belongs to the technical field of novel wave-absorbing materials.The wave-absorbing material is prepared through a two-step hydrothermal method, firstly, thiourea and ferrocene are mixed through the hydrothermal method to prepare ferrous sulfide, and then the ferrous sulfide and the ferrocene are mixed through a hydrothermal method to prepare the ferrous sulfide-barium titanate wave-absorbing material. Barium chloride, butyl titanate and the prepared ferrous sulfide are subjected to a reaction through a hydrothermal method, a ferrous sulfide-barium titanate composite material is obtained, and the wave absorbing performance of the composite material is adjusted by adjusting the content of barium titanate in the composite material. The ferrous sulfide-barium titanate composite wave-absorbing material prepared by the method has the advantages of lower density, wider effective absorption frequency band, higher electromagnetic wave absorption performance, simple preparation method, capability of regulating and controlling the morphology of the composite material and the like.

The present invention relates to the technical field of preparation of barium chloride, and in particular to a method for preparing barium chloride by barium slag, comprising the following steps: S1, subjecting the barium slag to ball milling pretreatment; S2, mixing the pretreated barium slag with calcium chloride and carbon powder, and performing segmented high-temperature roasting to obtain a roasted product; S3, subjecting the roasted product to graded leaching treatment with hot water and dilute hydrochloric acid, filtering to obtain a leachate after the leaching treatment, concentrating and crystallizing to obtain a crude barium chloride product; S4, dissolving the crude barium chloride product in hot water, adding a coprecipitant and polyaspartic acid for aging treatment, filtering to obtain a filtrate after the aging treatment, and concentrating the filtrate by vacuum evaporation to obtain a pure barium chloride product. The present invention achieves efficient conversion of difficult-to-treat barium slag and precise separation of impurities through the process design of "segmented high-temperature roasting-graded leaching-coprecipitation purification", significantly improving the resource utilization rate of barium.

The invention relates to the technical field of preparation of barium chloride, in particular to a method for preparing barium chloride from barium slag, which comprises the following steps: S1, carrying out ball milling pretreatment on the barium slag; s2, mixing the pretreated barium slag with calcium chloride and carbon powder, and performing segmented high-temperature roasting to obtain a roasted product; s3, the roasted product is subjected to graded leaching treatment with hot water and diluted hydrochloric acid, after leaching treatment is completed, leaching liquid is obtained through filtering, concentration and crystallization are conducted, and a crude barium chloride product is obtained; and S4, dissolving the crude barium chloride product in hot water, adding a synergistic precipitator and polyaspartic acid, carrying out aging treatment, after the aging treatment is completed, filtering to obtain a filtrate, and carrying out vacuum evaporation concentration on the filtrate to obtain a pure barium chloride product. According to the method, through the process design of sectional high-temperature roasting, graded leaching and collaborative precipitation purification, efficient conversion of the barium slag difficult to treat and precise separation of impurities are achieved, and the resource utilization rate of barium is remarkably increased.

The present application relates to the technical field of extracting rare earth, and particularly relates to an extraction rare earth separation process method. Fluorine-carbon cerium ore crude ore is treated to obtain activated ore powder. The activated ore powder is subjected to alkali pressure boiling oxidation, roasting transformation and optimal dissolution leaching to obtain a purified liquid. The purified liquid is then subjected to barium chloride sulfuric acid removal, lead removal by sulfurized lead, pH adjustment and the like to obtain a low-impurity chlorinated rare earth liquid. The chlorinated rare earth liquid is subjected to multi-stage extraction to obtain a neodymium chloride solution, a praseodymium-neodymium chloride solution and a lanthanum-cerium chloride solution. The solutions are subjected to oxalic acid precipitation and calcination to obtain a rare earth oxide product. The present application adopts fine pretreatment, multi-stage differential extraction and purification processes to achieve efficient separation of lanthanum-cerium, praseodymium-neodymium and neodymium in fluorine-carbon cerium ore and improve product purity.

The present invention relates to a method for recovering valuable materials from waste. The method for recovering valuable materials from waste comprises the steps of: (a) pulverizing waste, which is generated from an evaporator or a crystallizer among equipment of a zero liquid discharge process for desulfurization wastewater, and then injecting same into a dissolution tank so as to dissolve same in a solvent and separating same into a gypsum (CaSO4) precipitate and a supernatant from which the gypsum has been removed; (b) dissolving, in a desulfurization tank, barium chloride (BaCl2) in the supernatant from which the gypsum has been removed, and separating same into a barium sulfate (BaSO4) precipitate and a supernatant from which the barium sulfate has been removed; (c) dissolving, in a hydroxide tank, sodium hydroxide (NaOH) in the supernatant from which the barium sulfate has been removed, and separating same into a magnesium hydroxide (Mg(OH)2 precipitate and a supernatant from which the magnesium hydroxide has been removed; and (d) injecting, into a salt pond, the supernatant from which the magnesium hydroxide has been removed, so as to recover sodium chloride (NaOH).

The invention provides a roasting conversion method of ionic rare earth acid-soluble slag, which comprises the following steps: (1) mixing the ionic rare earth acid-soluble slag and an alkaline medium to ensure that the water content of the mixed material is 20-30%, and then granulating to obtain a granulated mixture; (2) loading the granulated mixture into a customized sagger, and carrying out a roasting reaction; (3) after the roasting reaction is finished, stripping the customized saggar from the clinker to obtain preparatory slag; and (4) sequentially carrying out water washing, acid leaching and solid-liquid separation on the preparatory slag to obtain rare earth-barium chloride-rich feed liquid and acid-soluble residues. According to the method, the process problem that the roasted clinker and the sagger are difficult to separate is effectively solved, the yield of the roasted clinker is high, the total weight reduction rate of the acid-soluble slag is high, and the barium leaching rate and the rare earth leaching rate are high; the dissipation of radioactive dust is reduced, and the industrial application prospect is good.

The invention discloses a preparation method of a barium-based hydrophobic oxygen production molecular sieve, which comprises the following steps: S1, fully mixing a sodium metaaluminate solution, potassium hydroxide, sodium silicate and deionized water, and carrying out hydrothermal reaction and centrifugal calcination to obtain a sodium-based molecular sieve; s2, uniformly mixing the sodium-based molecular sieve and a barium chloride solution, and performing hydrothermal reaction to obtain a barium-based molecular sieve; s3, mixing and stirring the barium-based molecular sieve and a phenyltrimethoxysilane solution to obtain the barium-based hydrophobic oxygen generation molecular sieve. The hydrophobicity of the molecular sieve can be improved, and the adsorption efficiency and the service life of the molecular sieve in a high-humidity environment are effectively improved.

The invention provides a barium chloride production waste residue treatment method, and relates to the technical field of barium chloride production waste residue treatment, and the barium chloride production waste residue treatment method comprises the following steps: S1, carrying out ball milling on waste residues containing barium sulfate and barium sulfide, and then carrying out pre-oxidation and hydration treatment to obtain a barium hydroxide-containing turbid liquid; s2, dehydrating and drying the turbid liquid in the S1; s3, mixing and calcining the dried material and sodium carbonate to obtain a calcined product containing barium carbonate; s4, the calcined product is subjected to hot water leaching to remove soluble sodium salt, and water leaching residues are obtained; s5, first-stage acid leaching is conducted on the water leaching residues through low-concentration hydrochloric acid, and first-stage leaching liquid and first-stage filter residues are obtained through filtering; performing second-stage acid leaching on the first-stage filter residue by using high-concentration hydrochloric acid, and filtering to obtain a second-stage leaching solution; and S6, combining the first-stage leaching solution and the second-stage leaching solution, adjusting the pH value to 4.0-5.0, filtering and separating precipitates, and concentrating and crystallizing to obtain a barium chloride product. According to the method, efficient conversion and resource utilization of barium in the waste residues are achieved through the processes of pre-oxidation toxicity control, calcination conversion, gradient acid leaching and deep purification.

The invention belongs to the technical field of refined aluminum preparation, and particularly relates to a preparation method of an electrolyte for preparing refined aluminum through a three-layer liquid electrolysis method. The method comprises the following steps: mixing electrolyte raw materials, and sequentially carrying out melting-pre-purification treatment and electrolytic purification treatment to obtain a purified electrolyte; and carrying out vacuum extraction on the purified electrolyte to obtain the electrolyte for preparing the refined aluminum by the three-layer liquid electrolysis method, the electrolyte is prepared from the following raw materials in percentage by mass: 60 to 61 percent of barium chloride, 23 to 24 percent of cryolite, 12 to 13 percent of aluminum fluoride and 3 to 4 percent of sodium chloride. Impurities are removed through electrolytic purification, the prepared electrolyte has reasonable primary crystal temperature, molecular ratio and electric conductivity, the phenomena of upturning, firing and more precipitates generated in the refined aluminum production process of the electrolyte can be greatly reduced, the quality grade of refined aluminum is improved, and the electricity unit consumption of refined aluminum liquid is reduced.

The utility model discloses a multi-stage filtering device for barium chloride liquid, and relates to the technical field of multi-stage filtering of the barium chloride liquid. A spiral flow deflector is arranged on the inner wall of the liquid conveying pipeline, the top of the spiral flow deflector is installed on the inner wall of the liquid conveying pipeline through at least two installation structures, and a gap exists between the bottom of the spiral flow deflector and the axis of the liquid conveying pipeline. The mounting structure comprises an annular fixing ring and a plurality of supporting rods movably connected with the annular fixing ring, the annular fixing ring is arranged on the inner wall of the liquid conveying pipeline, and the supporting rods are evenly distributed along the annular fixing ring. The ends, away from the annular fixing ring, of the multiple supporting rods are connected with different positions of the top of the spiral flow deflector correspondingly. The spiral drainage piece is stably arranged through the installation structure, disassembly is easy, turbulent flow and vortex can be effectively reduced, flowing is more stable, and the blocking risk is reduced.

The present invention discloses a graded extraction method for barium toxic substances and its application, which belongs to the field of chemical detection technology. The present invention utilizes a graded extraction method to extract and separate acid-soluble barium in rock cuttings samples, thereby avoiding this part of barium from combining with other substances in the subsequent detection process and reducing the accuracy of the detection; utilizing a composite carbon thermal reduction technology, the barium sulfate in the rock cuttings is reduced and converted into barium chloride detectable by ICP-OES, while the sulfate ions are reduced to soluble sulfides, and no oxidizing agents such as nitric acid are used in the subsequent extraction method, thereby avoiding the sulfide being further oxidized to sulfate ions and reducing the detection accuracy of barium. The graded extraction method of the present invention can separate barium salts of different toxicities in the sample, and realize quantitative analysis and detection of barium toxic substances of different toxicities in the sample.

The invention discloses a recovery method of a catalyst containing platinum, silver, chromium, vanadium, molybdenum and aluminum, which comprises the following steps: uniformly mixing a waste catalyst, caustic alkali and iron powder, reacting at high temperature, cooling to obtain a melt, dissolving the melt, and filtering to obtain a first filter residue and a first filtrate; dissolving the first filter residue with nitric acid, and filtering to obtain platinum-containing waste filter residue and second filtrate; adding a sodium chloride solution into the second filtrate, and filtering to obtain silver chloride filter residues and third filtrate which contains chromic nitrate; adding a barium chloride solution into the third filtrate, reacting at room temperature, and filtering to obtain barium chromate solid filter residues and fourth filtrate; adjusting the pH value of the first filtrate to 7-8 by using an acid, reacting at room temperature, and filtering to obtain activated aluminum oxide filter residues and a fifth filtrate; adding ammonium chloride into the fifth filtrate, reacting at room temperature, and filtering to obtain ammonium vanadate filter residues and sixth filtrate; and adjusting the pH value of the sixth filtrate to be less than 1 by using sulfuric acid, reacting at room temperature, and filtering to obtain molybdic acid filter residues and a seventh filtrate.

The invention belongs to the technical field of inorganic materials, and particularly relates to a preparation method of high-purity barium carbonate. High-purity barium carbonate is prepared from a barium chloride solution and an ammonium bicarbonate solution through a coprecipitation method, a crystal form control agent is added into the barium chloride solution in advance, and a surfactant is added into the ammonium bicarbonate solution, so that an auxiliary agent is adsorbed to a potential crystal nucleus site in advance, the liquid phase interfacial tension is reduced, and the uniformity of a barium carbonate precipitation reaction is ensured; hyperbranched polycarboxylic acid and tartaric acid are compounded to form a crystal form control agent, polyacrylic acid and citric acid are compounded to form a composite dispersing system, the crystal form control agent, a surfactant and a composite dispersing agent are added, and the pH value in the reaction process is controlled, so that the prepared barium carbonate has higher purity and sphericity and narrower particle size distribution.

The utility model relates to an auxiliary device for packing barium chloride powder, which belongs to the technical field of barium chloride production and comprises a base and a mounting box fixedly connected to the top of the base, and a bag opening clamping device used for clamping a bag opening of a woven bag is arranged outside the mounting box. The top of the base is provided with an overturning mechanism for overturning and transferring the woven bag; and the bag opening clamping device comprises a hopper arranged outside the mounting box, and the exterior of the hopper is fixedly connected with a fixing frame. According to the barium chloride powder packaging auxiliary device, through cooperative use of an electric push rod and a clamping block, a bag opening of a woven bag can be firmly clamped to prevent the bag opening from sliding, the smooth proceeding of the charging process is ensured, a servo motor is started through a controller to work to drive a threaded rod to rotate, and the threaded rod rotates to drive a moving block to move; and vertical movement of the fixing frame and the hopper is achieved, then barium chloride powder bagging is completed, manual intervention is reduced, the packaging efficiency is improved, and the advantage of high packaging efficiency is achieved.

The invention discloses a rare earth radioactive slag reduction and barium sulfate slag recycling method based on transformation and decomposition of barium sulfate. The method comprises the following steps: drying, ball-milling and screening rare earth radioactive slag, adding water into sodium hydroxide, and mixing to obtain rare earth slag; roasting and transforming the rare earth slag under the condition of introducing carbon dioxide; washing the roasted and transformed rare earth slag with water; the washed rare earth slag is subjected to acid dissolution and solid-liquid separation, and high-silicon slag without radioactive elements and an acid solution with the radioactive elements are obtained; sulfuric acid is added into the acid solution step by step for fractional precipitation and radium removal, and barium and radium residues containing radioactive elements and barium sulfate residues without radioactivity are obtained through solid-liquid separation; adjusting the mass ratio of the barium sulfate slag and sodium hydroxide, then carrying out alkali conversion and acid dissolution to obtain a barium chloride solution, and recycling the barium chloride solution for removing sulfate radicals from the rare earth feed liquid. According to the method, barium sulfate in the rare earth radioactive slag can be transformed into more than 95% of soluble barium salt, the amount of the rare earth radioactive slag is reduced by more than 85%, and the barium circulation rate reaches more than 90%.

The present invention relates to the preparation of carbon nanotubes. Disclosed is a catalyst for preparing carbon nanotubes. The catalyst comprises a molten halogen salt, wherein the halogen salt comprises a first halogen salt, a second halogen salt and a third halogen salt. The first halogen salt is calcium chloride; the second halogen salt is potassium chloride; and the third halogen salt is selected from one or more of zinc chloride, copper chloride, barium chloride, titanium chloride, chromium chloride, gallium chloride, cobalt chloride, nickel chloride, manganese chloride, ferric chloride, ferrous chloride and aluminum chloride. On the basis of the total molar weight of the catalyst, the content of the first halogen salt is 20-80 mol%, the content of the second halogen salt is 0-10 mol%, and the content of the third halogen salt is 20-80 mol%. In the present invention, using the molten salt as a catalyst for preparing carbon nanotubes can effectively reduce metal pollution in a carbon product, and is more environmentally friendly than acid pickling in a metal catalytic system

The invention relates to the technical field of all-vanadium redox flow batteries, and discloses a mixed acid-based electrolyte and a preparation method and application thereof.The preparation method at least comprises the following steps that a sulfuric acid-based vanadium electrolyte is prepared through a chemical reduction-electrolysis method, the sulfuric acid-based vanadium electrolyte is poured into a rotary container of a rotary evaporator, rotary evaporation operation is conducted, and the mixed acid-based electrolyte is obtained; adding a barium chloride solution into the sulfuric acid-based vanadium concentrated solution, fully stirring to obtain a sulfate acid-based vanadium crude solution, filtering the sulfate acid-based vanadium crude solution by using a microfiltration membrane to obtain a filtrate, namely the sulfate acid-based vanadium concentrated solution, adding deionized water into the sulfate acid-based vanadium concentrated solution, diluting the concentrated solution, and filtering to obtain the sulfate acid-based vanadium sulfate. The mixed acid group vanadium electrolyte has the advantages of being high in energy density, wide in use temperature range and good in vanadium stability, and the problems that the hydrochloric acid concentration is difficult to control accurately and the environment is polluted due to hydrochloric acid volatilization and chlorine evolution during electrolysis in a conventional method are solved.

The utility model discloses a kind of solid waste treatment device for preparing electronic grade barium chloride using industrial barium carbonate barium residue, is related to solid waste treatment technical field, including processing box and solid waste crushing mechanism, the side of the processing box is provided with first accommodating cavity, the side surface of the rolling gear is engaged and is connected with fixed gear.The solid waste treatment device for preparing electronic grade barium chloride using industrial barium carbonate barium residue, the rotation of sliding rod makes rolling gear roll along the outside of fixed gear, so as to drive reciprocating screw rod to drive moving sleeve to make sliding rod carry hammerhead to occur reciprocating displacement in rotor disc inside, so that hammerhead is no longer single trajectory when rotating in processing box inside, and because of the change of hammerhead rotating track, the big particle barium residue originally located between hammerhead can be fully stressed to realize crushing, so as to solve the problem that barium residue cannot be stressed to crush due to sliding trajectory located between hammerhead, so as to effectively improve the crushing efficiency of barium residue.

The invention discloses a method for detecting the content of sulfate radicals in gallium waste liquid, which is characterized in that the sampling amount is reduced from original 10mL to 5mL, the addition amount of concentrated hydrochloric acid is adjusted from 20mL to 5mL, and the pH value of the system is still maintained at 1-2 after the reaction is complete; the barium chloride solution keeps the original procedure dosage (20mL 10%), barium sulfate is ensured to be completely precipitated, and the steps of filtering, washing, firing and weighing are completed according to the original procedure after precipitation. Multiple parallel tests verify that the relative standard deviation of the method is smaller than or equal to 3%, and the production detection precision requirement is met; the method is compatible with the existing standard operation process of an enterprise, adapts to the characteristic of high concentration of gallium waste liquid sulfate radicals, does not need to add equipment or extra training, and can be directly applied to the ground.

The invention discloses a core-shell grinding material with a water-soluble shell, a polishing disc and a preparation method and application of the core-shell grinding material and the polishing disc, and belongs to the technical field of precision machining. The core-shell grinding material of the water-soluble shell is composed of a grinding material inner layer and a water-soluble inorganic salt outer layer, the core-shell grinding material and the grinding material inner layer are both granular, and the water-soluble inorganic salt outer layer comprises one or more of sodium chloride, sodium sulfate or barium chloride. The core-shell grinding material with the water-soluble shell exists in a polishing disc in a consolidation mode before polishing, in the workpiece polishing process, along with dropwise adding of the deionized water-based polishing solution, the shell of the core-shell grinding material is rapidly dissolved, and the grinding material exists in limited space pores generated by dissolution of the shell in a free mode. Due to the fact that the holes have a limiting effect on the grinding materials, waste of the grinding materials is reduced, damage of the grinding materials to the surface / subsurface of the workpiece is reduced, and finally the atomic-scale surface roughness is obtained.

The present application relates to the technical field of barium chloride production and preparation, and particularly relates to a purification method of electronic-grade barium chloride, comprising the following steps: S1, obtaining barium-containing filter residue by washing barite tailing barium residue with hydrochloric acid; S2, mixing the barium-containing filter residue and hydrochloric acid to perform leaching treatment, and obtaining barium chloride crude product; S3, dispersing the barium chloride crude product in water, adjusting the pH of the solution, adding a decontaminating agent, and performing ultrasonic-assisted segmented temperature control treatment, and obtaining barium chloride solution after filtration; S4, adding a crystal form control agent to the barium chloride solution, and performing programmed cooling crystallization under the action of a low-intensity direct current electric field to obtain electronic-grade barium chloride. The technical scheme of the present application realizes efficient conversion of difficult-to-treat barium residue and precise separation of impurities, overcomes technical problems such as low barium recovery rate, difficulty in removing impurities, and unstable product purity in traditional methods, and significantly improves the resource utilization rate of barium.

The invention relates to the technical field of metal halide luminescent materials, and discloses a preparation method of a cesium-lead-bromine-chlorine blue-light quantum dot colloid and a preparation method of a blue-light film. The method comprises the following steps: dissolving cesium bromide and lead bromide in N, N-dimethylformamide, adding oleic acid and oleylamine to form a precursor solution, and injecting the precursor solution into a toluene anti-solvent to prepare CsPbBr3 quantum dot colloid; and then dropwise adding a toluene saturated solution of alkaline earth metal chloride (calcium chloride, strontium chloride, barium chloride or magnesium chloride) for post-treatment to realize ion exchange of Cl <-> and Br <-> and synergistic defect passivation, so that the emission peak is continuously adjustable in the range of 450-500 nm, the half-peak width is less than 30 nm, and the photoluminescence quantum yield is greater than 60%. And further mixing the quantum dot colloid with a polymethyl methacrylate toluene solution and forming a film to obtain a stable blue light quantum dot film which can be used for a backlight source or a display device.

The invention belongs to the field of rare earth afterglow luminescent materials. The invention discloses a high-brightness divalent rare earth afterglow material. The molecular formula of the high-brightness divalent rare earth afterglow material is BaFCl: Gd / Li / Sm. The preparation method sequentially comprises the following steps: uniformly mixing and grinding barium fluoride, barium chloride, gadolinium chloride, samarium chloride and lithium chloride in proportion, carrying out high-temperature reaction in a tubular furnace, and carrying out heat preservation in a drying oven to obtain a product. The product has the characteristics that the product has very strong afterglow performance under X-ray excitation, the afterglow luminescence brightness value can reach 4.53 cd m <-2 >, the afterglow duration is longer than 100 hours, and the product has a very good application prospect in the field of delayed X-ray imaging.

The invention provides a method for recovering lithium chloride, and relates to the technical field of lithium salt recovery. The method for recovering lithium chloride comprises the following steps: adding calcium chloride or barium chloride into a solution containing lithium and sodium, carrying out solid-liquid separation after complete reaction, and collecting a first filtrate; and separating sodium chloride and lithium chloride in the first filtrate by adopting an alcohol solvent to obtain lithium chloride. According to the method, sulfate radicals in the solution are removed through calcium chloride or barium chloride precipitation, then high-purity lithium chloride is obtained through separation according to the solubility difference of sodium chloride and lithium chloride in the alcohol solvent, and the recovery rate of lithium is high.

The application belongs to the technical field of material science and engineering, and discloses a preparation method of manganese and bismuth co-doped barium strontium titanate ceramic material with high dielectric property. The application adopts a liquid phase method to react titanium tetrachloride, barium chloride, strontium chloride, oxalic acid, manganese oxide and bismuth oxide to obtain uniform barium strontium titanate powder. Co-doping is selected in the aspect of doping, and the manganese and bismuth co-doped barium strontium titanate is the first case. The preparation method highlights that the particle size of the prepared barium strontium titanate powder is smaller and uniform without agglomeration, and the barium strontium titanate powder has the characteristics of high dielectric constant and low dielectric loss.

The present invention belongs to the technical field of organic pigments, and particularly relates to a preparation method of a blue-violet organic pigment, which includes: adding water and soda ash into a coupling pot and stirring evenly, adding 5-amino-4-hydroxynaphthalene-2,7-disulfonic acid during stirring and stirring for 0.5-1 h, then adding 4-chlorobenzoyl chloride and controlling the pH, cooling to 5-10 °C to obtain a coupling solution; adding water and 1-naphthylamine into a reaction pot, adding hydrochloric acid and stirring for 1-2 h, then adding a sodium nitrite solution in a low-temperature environment for a constant-temperature diazotization reaction for 2-3 h to obtain a diazo solution; adding the diazo solution into the coupling solution, adjusting the pH and reacting for 2 h, then adding an aqueous barium chloride solution and an auxiliary agent, heating to 95 °C, keeping warm for 2 h, finally filtering and rinsing to neutral, and drying and pulverizing to obtain the blue-violet organic pigment. The present invention uses 5-amino-4-hydroxynaphthalene-2,7-disulfonic acid as a coupling component raw material and 1-naphthylamine as a diazotization raw material, and obtains the blue-violet organic pigment through a diazo coupling reaction, enriching the chromatogram of azo organic pigment varieties.

This invention discloses a sulfide solid electrolyte and its preparation method, belonging to the field of solid electrolyte technology. SA / HPMC nanofiber membranes are prepared using electrospinning combined with barium chloride solution crosslinking technology; amino-modified SA / HPMC nanofiber membranes are obtained by KH-550 modification; LLZNO composite sulfide powder is synthesized through mechanical ball milling and high-temperature sintering; then, it is dissolved with PEO in anhydrous acetonitrile, impregnated with an amino-modified carrier, and hot-pressed to obtain the sulfide solid electrolyte. The fiber membrane of this invention has good mechanical strength and structural stability. This optimized porous fiber structure can guide the uniform adhesion of sulfide powder and pre-build a framework for ion conduction. Ultimately, the sulfide solid electrolyte possesses high ionic conductivity, air stability, and room-temperature cycling performance.

This application discloses a nano-tetragonal barium titanate and its process-enhanced continuous preparation method, belonging to the field of barium titanate preparation technology. The process-enhanced continuous preparation method for nano-tetragonal barium titanate includes the following steps: preparing a circulating mother liquor, a titanium tetrachloride acid hydrolysate, a barium chloride solution, and an ammonia solution; adding the titanium tetrachloride acid hydrolysate dropwise to the barium chloride solution to obtain a titanium-barium mixture; passing the titanium-barium mixture, the circulating mother liquor, and the ammonia solution into a microdroplet process-enhanced device for mixing and reaction; after heat preservation and aging, and solid-liquid separation, obtaining a mixed precipitate and a first filtrate; dissolving the mixed precipitate in a solvent, filtering to obtain barium oxalate tetrahydrate and a second filtrate; calcining the barium oxalate tetrahydrate to obtain nano-sized tetragonal barium titanate powder. By employing a microdroplet process-enhanced method, the titanium-barium mixture and the ammonia solution are dispersed into microdroplets smaller than 10 μm, enhancing the degree of material mixing, improving the mass transfer rate, and obtaining nano-barium titanate with small particle size and high purity.