64results about "Boron-oxygen compounds" patented technology

The present invention provides an oxyhalide, a preparation method therefor, and an all-solid-state lithium battery. The preparation method comprises: (1) grinding a mixture of a lithium source and a boron source, which are weighed in a stoichiometric ratio, tableting the mixture, then putting the tableted mixture into a reaction tube, evacuating the reaction tube to establish a vacuum, sealing the reaction tube, and then performing primary calcination, wherein the primary calcination temperature is 300-450ºC, and the primary calcination time is 4-20 h; and (2) after the primary calcination, cooling to room temperature, taking out the intermediate product from the reaction tube, grinding and tableting the intermediate product, then putting the tableted product into a reaction tube, evacuating the reaction tube to establish a vacuum, sealing the reaction tube, performing secondary calcination, and then cooling to room temperature. The preparation method of the present invention is simple and has high raw material utilization rate and no byproducts, thereby facilitating industrial production. The prepared oxyhalide has relatively high ionic conductivity and stability, and relatively good interface stability with metal lithium. The prepared all-solid-state lithium battery has excellent electrochemical performance.

A method of producing a chemical hydride is described and which includes selecting a composition having chemical bonds and which is capable of forming a chemical hydride; providing a source of a hydrocarbon; and reacting the composition with the source of the hydrocarbon to generate a chemical hydride.

The invention relates to the technical field of heat-insulating and demagnetizing refrigeration, and discloses a heat-insulating and demagnetizing refrigeration material based on a Trellis crystal lattice and a preparation method and application of the heat-insulating and demagnetizing refrigeration material. The chemical formula of the heat insulation and demagnetization refrigeration material based on the Trellis crystal lattice is Gd2GeB2O8. A magnetic test result of the Gd2GeB2O8 crystal shows that the magnetic anisotropy of the crystal material is relatively weak and tends to magnetic isotropy, and a long-range magnetic orderliness phenomenon is not observed above 1.8 K. And when adiabatic demagnetization is carried out under initial conditions that T is equal to 3K and B is equal to 7T, the material can reach the maximum negative magnetic entropy difference of 51.68 J * kg <-1 > * K <-1 >, which shows that the Gd2GeB2O8 has a better application prospect in a 3-17K temperature zone and a sub-Kelvin temperature zone.

The invention relates to the technical field of batteries, in particular to a positive electrode material and a preparation method and application thereof. The positive electrode material comprises: an inner core, the inner core satisfies a chemical general formula LizMnxFe (1-x) RyPO4, and 0.5 < = xlt; 1, 0lt; yt; Yt; 0.1, 0.9 < = z < = 1.2; r comprises at least one of Al, Mg, Ca, Sr, V, Cr, Y, Mo, Nb, B, W, La, Sm, Co, Ni, Cu, Zn, Zr and Ti; the coating layer is arranged on at least part of the surface of the inner core, and the coating layer comprises a boron-doped carbon coating layer. The lithium manganese iron phosphate positive electrode material is synergistically modified in a multi-element doping and boron doping carbon coating manner, so that the lithium ion transmission path can be widened, more electron holes can be formed, the electron transmission efficiency can be improved, the conductivity of the material can be improved, and the rate and the dynamic performance of the material can be further improved; and relatively high and stable cycle performance is ensured.

The application discloses a surface-coated and bulk-gradient co-doped sodium ion battery positive electrode material and a preparation method and a sodium ion battery thereof, and belongs to the technical field of sodium ion batteries. The sodium ion battery positive electrode material comprises a layered transition metal oxide and a coating layer coated on the surface of the layered transition metal oxide; the layered transition metal oxide is a nickel-iron-manganese-based layered transition metal oxide, and the coating layer is an amorphous boron oxide coating layer; the chemical formula of the surface-coated and bulk-gradient co-doped sodium ion battery positive electrode material is Na(Ni 1 / 3 Fe 1 / 3 Mn 1 / 3 ) x B y M z O2, 0.9≤x≤0.98, 0.01≤y<0.2, 0.01≤z<0.1, and x+y+z=1, and M is selected from W or Nb; wherein the doping concentration of boron elements and metal M elements presents a gradient decreasing trend from the surface layer to the inside along the radial direction; the surface boron oxide coating and the bulk-gradient doping of boron elements and metal M elements are simultaneously realized; the surface coating layer effectively reduces the interface side reaction, and the bulk-gradient doping stabilizes the crystal structure from the inside; and the two synergistically act to jointly inhibit the structural degradation in the cycle process.

The utility model relates to the technical field of boric acid production, and discloses a boric acid production impurity separation device which comprises a bottom plate, a first gear fixedly connected to the outer surface of a driving rod, a rotating rod fixedly connected to the interior of a second gear, and stirring rods fixedly connected to the outer surface of the rotating rod and the outer surface of the driving rod. A discharging brush is fixedly connected to the outer surface of the driving rod, and an annular discharging plate is arranged at the bottom of the treatment tank. According to the stirring device, the driving motor is started, the first gear on the driving rod drives the rotating rod to rotate through the second gear, the stirring rods stir dissolved substances in the tank in a staggered mode, and after the dissolved substances are dissolved and precipitated, the annular discharging plate is opened to carry out the subsequent impurity removal procedure. And the residual solution passes through an adsorption column filled with a special adsorbent, so that impurities in the boric acid solution can be further adsorbed and removed, and the adsorption effect is better.

The invention relates to the technical field of chemical devices, in particular to a hydrolytic crystallization device, a hydrolytic crystallization method and a system for manufacturing boric acid. The hydrolytic crystallization device comprises a container body, a cyclic heating assembly, a flow guide part, a stirring assembly, a crystal collecting assembly and a steam collecting part. The container body is arranged to form a hydrolytic crystallization chamber and a feeding hole; the circulating heating assembly heats the materials and then returns the materials to the crystallization chamber, and the process is circulated; the flow guide part is arranged in the hydrolytic crystallization chamber and used for forming a flow guide chamber, and the top and the bottom of the flow guide chamber are both communicated with the hydrolytic crystallization chamber; the stirring assembly is arranged to stir materials in the flow guide chamber; part of materials at the bottom of the crystallization chamber can flow downwards to enter the crystal collection assembly; the steam collecting piece is used for condensing steam at the top of the hydrolysis crystallization chamber into liquid and collecting the liquid. According to the hydrolytic crystallization device, the crystallization efficiency and the grain uniformity can be improved.

The present application relates to a kind of sodium sulfate iron composite sodium ion positive electrode material and its preparation method and battery, belong to sodium battery technical field, to solve at least one of the problems such as the poor air stability and conductivity of the sodium sulfate iron positive electrode material prepared by the existing method, easily lead to the capacity and cycle stability of battery is low, limit the application of sodium sulfate iron positive electrode material in sodium ion battery.The inner layer of the sodium ion positive electrode material of the present application is boron oxide coated sodium sulfate iron, the middle layer is boron-carbon nanotube transition layer, the outer layer is carbon nanotube coated sodium sodium pyrophosphate phosphate, boron-carbon nanotube transition layer is formed by the covalent bonding reaction of boron oxide and the functional group of CNTs after high-temperature induced decomposition of boric acid, double optimization is carried out in the interface combination and conductivity, improve the ion conductivity of sodium ion positive electrode material, the capacity of positive electrode material, rate and cycle performance, especially air stability.

The application belongs to the technical field of fine chemical industry, and specifically provides a process method for preparing nuclear-grade boric acid by reverse osmosis membrane purification of boric acid, which comprises the following process steps: pretreatment, complexation impurity removal, two-stage membrane separation, and rate control crystallization. The process method has the advantages of excellent impurity removal effect, simple process, easy operation and control, good reproducibility, low production cost, environmental friendliness, etc., and the prepared nuclear-grade boric acid is suitable for the field of nuclear industry, electronic-grade materials and other fields with high requirements for the purity of boric acid.

The invention relates to a device and method for preparing boric acid from a boron trifluoride-methyl ether complex, the device comprises a steam generator, a gasification device and a reactor, and the steam generator and the gasification device are gathered through a pipeline and then connected with the reactor; the steam generator is used for producing steam; and the gasification device is used for producing a gas boron trifluoride-methyl ether complex. The method for preparing boric acid comprises the following steps: step 1, air replacement; step 2, preheating; 3, enabling water vapor to react with the boron trifluoride-methyl ether complex in a reactor to obtain a primary product; and step 4, after the reaction is completed, continuously keeping the temperature. The boron trifluoride-methyl ether complex reacts with water vapor at high temperature, boron oxide is obtained through a one-step method, the technical route is greatly simplified, the yield of boron is increased, and production energy consumption is reduced.

The invention belongs to the technical field of fine chemical engineering, and particularly provides a process method for preparing nuclear-grade boric acid by purifying boric acid through a reverse osmosis membrane, and the process method comprises the following process steps: pretreatment, complexing impurity removal, two-stage membrane separation and speed-controlled crystallization. The technological method provided by the invention has the advantages of being excellent in impurity removal effect, simple in process, easy to operate and control, good in reproducibility, low in production cost, environment-friendly and the like, and the prepared nuclear-grade boric acid is suitable for the fields of nuclear industry, electronic-grade materials and the like which have high requirements on the purity of boric acid.

The present application relates to the field of biological enzyme catalyst, especially to a kind of immobilized laccase based on inorganic porous material and its preparation method and application, the immobilized laccase based on inorganic porous material designed in the present application, the immobilized laccase includes inorganic porous material and laccase adsorbed and fixed on the surface of inorganic porous material, the inorganic porous material is prepared by dynamic hydrothermal synthesis method with piperidine as template agent, with aluminum isopropylate as aluminum source, boric acid as boron source, fumed silica as silicon source. Laccase is adsorbed and immobilized by using the inorganic porous material, and the immobilized laccase catalyst obtained has good enzymatic performance, and the immobilized laccase has significant effect in removing quinolone antibiotics.

The embodiment of the invention relates to the technical field of chemical devices, in particular to an esterification device and a system for manufacturing boric acid. The esterification device comprises an esterification container, a heating piece and a stirring assembly, the esterification container forms an esterification chamber and a liquid inlet, a feed port and a discharge port which are communicated with the esterification container, the liquid inlet is used for introducing a boron trifluoride-methanol complex into the esterification chamber, the feed port is used for introducing a solid defluorination agent into the esterification chamber, and the discharge port is used for discharging the boron trifluoride-methanol complex into the esterification chamber; the boron trifluoride-methanol complex and the solid defluorinating agent are subjected to an esterification reaction in the esterification chamber to generate trimethyl borate and a solid by-product; the heating piece is arranged to heat the esterification chamber and keep the temperature in the esterification chamber stable; the stirring assembly is used for stirring the materials in the esterification chamber, so that the materials are uniformly mixed. According to the esterification device, the temperature in the esterification chamber is kept constant through the heating piece, the reaction process is accelerated through the stirring assembly, and the esterification reaction rate and the material conversion rate can be increased.

The present invention provides a flaky boric acid and a preparation method thereof. The morphology of the flaky boric acid is flaky, D 50 The particle size is not less than 3 mm. The boric acid flakes provided by the present invention have D 50 The characteristic of larger particle size.

The present application relates to a series of compounds calcium halogenated borate and calcium halogenated borate nonlinear optical crystal and preparation method and use, the molecular general formula of the series of compounds is Ca2B3O6X, wherein X=Cl, Br, molecular weight 244.04-288.50, the compound is synthesized using solid phase reaction method;The crystal is orthorhombic, space group Cmc 21, the cell parameter is a=15.360 (6)-15.406 (2) Å, b=22.115 (3)-22.175 (10) Å, c=7.3617 (11)-7.454 (4) Å, Z=16, V=2508.2 (6)-2538.7 (19) Å 3 , the crystal is grown using cosolvent method, the powder frequency doubling effect is about 1.5-2 times of KDP (KH2PO4), has wide light transmission waveband, the crystal preparation method is simple, and the cost is low, the prepared crystal is large in mechanical hardness, easy to cut, polishing processing and preservation, the series of calcium halogenated borate nonlinear optical crystal described in the application has the advantages of stable physical and chemical properties, moderate mechanical hardness, not easy to break, easy to cut, polishing processing and preservation and the like.

The invention belongs to the technical field of salt lake boron extraction, and particularly relates to a system and method for efficiently extracting boron from salt lake brine, the system comprises a brine pretreatment module, an acidification reaction module, a solid-liquid separation module, a washing and drying module, a waste gas treatment module and a monitoring control module, the waste gas treatment module comprises a waste gas purification tower; waste gas generated by all the modules in the brine processing process is guided into the recycling area at the bottom of the tower body through the gas inlet pipe, the spraying assembly is started, purified water mist is released downwards, in gaps of the purification filler, the waste gas flowing upwards makes contact with the purified water mist flowing downwards, acid pollutants in the waste gas make contact with purification liquid, and the waste gas is purified. Dust particle impurities in the waste gas are combined with the purified liquid water mist and then settled downwards, and the dust particle impurities are separated from the waste gas after being absorbed; the purification filler effectively delays the flowing speed of the waste gas, the waste gas is in full contact with the purification water mist, and the purification efficiency of waste gas pollutants is improved.

This invention relates to the field of lithium-ion battery technology, specifically to a low-temperature cathode material and its preparation method, a cathode sheet, and a lithium-ion battery. The low-temperature cathode material includes a matrix material and a coating layer; the raw materials for preparing the low-temperature cathode material include a first precursor and a second precursor, with a mass ratio of n; n is related to the average single-crystal particle size r of the low-temperature cathode material, the electrode compaction density PD of the cathode sheet containing the low-temperature cathode material, and the particle size d of the low-temperature cathode material. 99 and particle size d min Satisfying 30≤(n×PD×d) 99 ) / (d min ×r)≤100. This low-temperature cathode material has low cost and good low-temperature charge-discharge performance.

The present application relates to the technical field of inorganic chemistry, and particularly relates to a method for comprehensive utilization of sodium borolite mineral resources, which comprises the following steps: taking sodium borolite as raw material, and obtaining boric acid, calcium sulfate hemihydrate and sodium nitrate through a series of coupled processing procedures in a production system, wherein the boric acid meets the quality index of superior product of the national standard boric acid product standard, the purity of the calcium sulfate hemihydrate reaches more than 99%, and the sodium nitrate meets the national standard sodium nitrate product standard. The method has the beneficial effect that the method for comprehensive utilization of sodium borolite mineral resources makes the elements such as boron, calcium, sodium and magnesium in the sodium borolite and the raw materials such as sulfuric acid, sulfate and nitric acid used in the processing enter the products as much as possible, not only makes the sodium borolite mineral resources be fully utilized, but also greatly reduces the discharge of "three wastes" in the production process.

The present invention relates to a rubidium fluoro-scandium borate compound, a rubidium fluoro-scandium borate nonlinear optical crystal, and a preparation method and application thereof. The rubidium fluoro-scandium borate compound has a chemical formula Rb2ScB3O6F2, does not contain a symmetry center and has a molecular weight of 382.33 g / mol. The rubidium fluoro-scandium borate nonlinear optical crystal belongs to the monoclinic crystal system, and belongs to the non-centrosymmetric space group P21, and the unit cell parameters are: a = 4.0372(10) Å, b = 11.800(3) Å, c = 8.823(2) Å, α = γ = 90°, β = 98.327(11) °, Z = 2. The present invention adopts a high-temperature vacuum packaging method or a solid-state synthesis method to prepare rubidium fluoro-scandium borate compounds. The present invention adopts a fluxing agent method to prepare a rubidium fluoro-scandium borate nonlinear optical crystal, which have the advantages of short absorption cutoff edge, large nonlinear optical effect, good thermal stability, and stable physical and chemical properties. The rubidium fluoro-scandium borate nonlinear optical crystal of the present invention can be used to fabricate nonlinear optical devices, which have important applications in fields such as optics, military, laser lithography, and communication, etc..

This invention discloses a method for preparing nuclear-grade boric acid, belonging to the fields of fine chemicals and nuclear materials technology. First, polyacrylonitrile-based activated carbon fibers are surface-modified by nitric acid oxidation and grafting with disodium ethylenediaminetetraacetate to impart strong ion exchange capabilities. Then, this modified fiber is packed into a fixed-bed adsorption column. Next, industrial boric acid is dissolved, pre-filtered, and the solution is passed through the adsorption column for dynamic adsorption purification, effectively removing Fe. 3+ Ca 2+ Cl ‑ SO4 2‑ Impurity ions are removed; finally, the product is obtained through programmed cooling crystallization, separation, and drying. This invention, through the synergistic effect of adsorption and ion exchange, achieves a boric acid main content ≥99.9% and reduces the impurity ion content to the ppm level while maintaining... 10 The boron isotope abundance is essentially unaffected, meeting the stringent requirements of Generation II and above nuclear power plants for boric acid used in safety and control systems. The process is stable and suitable for industrial production.

The invention discloses a device for recovering boric acid from an iron alloy XRF tabletting sample and a recovery method thereof, and relates to the technical field of analytical chemistry sample pretreatment and resource recovery. The recovery device comprises a base, a sample pretreatment mechanism, a leaching mechanism, a solid-liquid separation mechanism, an evaporation concentration mechanism, a complex reaction mechanism and a directional condensation trapping mechanism, wherein a master controller is fixedly mounted on the side wall of the base; the recovery method comprises the steps of sample pretreatment, leaching reaction, solid-liquid separation, evaporation and concentration, complexation reaction, vaporization and gradient condensation, boric acid trapping and desorption and purification. According to the method, volatilization, decomposition and impurity adsorption loss of boric acid in the operation process are reduced to the maximum extent, the boric acid recovery rate is effectively improved and is remarkably higher than that of a traditional method, meanwhile, the selective recovery capacity of boric acid is enhanced through introduction of the complexing agent and design of the special trapping trap, and interference of other coexisting components is reduced.

The positive electrode active material of the present invention can simultaneously improve the capacity and lifespan of a battery, the battery can simultaneously have improved capacity and lifespan, and the preparation method of the positive electrode active material can prepare the positive electrode active material capable of simultaneously improving the capacity and lifespan of the battery.

The invention relates to a method for recovering boron from boron-containing calcium salt waste residue, which comprises the following steps of: a, preparing slurry, namely adding a sintering aid into the boron-containing calcium salt waste residue, calcining and crushing at high temperature, and adding water to prepare the slurry; b, boric acid leaching is conducted, specifically, a leaching agent is added into the slurry, stirring is conducted, and a boron-containing solution is obtained; c, precipitating and filtering, namely filtering the leached slurry, heating and concentrating filtrate, and applying filter residues to industrial calcium fluoride production; step d, preparing boric acid, evaporating and concentrating the filtered filtrate, and adjusting the pH value to 1-5; and step e, crystallizing boric acid, cooling the filtrate to room temperature, separating out a crystal substance, filtering, washing and drying to obtain a boric acid product. According to the method, the cost of the enriched boron-10 acid is reduced, the benefits of enterprises are increased, the whole industrial chain development of the domestic enriched boron-10 acid is promoted, and solid waste resource utilization is realized while the solid waste treatment cost is reduced.

The invention provides a method and a device for separating boron isotopes through membrane chromatography. The invention provides a method for separating boron isotopes by membrane chromatography, which comprises the following steps: by taking a composite membrane material as a stationary phase and a boron-containing solution as a mobile phase, directly enabling the boron-containing solution to flow through a composite membrane to enrich 10B in a membrane phase and enrich 11B in a liquid phase, wherein the composite membrane contains a compound capable of separating boron isotope functional groups. The invention provides a membrane chromatography technology which has the advantages of a membrane technology and a chromatography technology, on one hand, through structural modification and functionalization of membrane ligand pore channels and surfaces, selective adsorption separation of the membrane on different target objects can be achieved, separation factors are increased, and the abundant membrane pore channel structure can effectively reduce internal diffusion resistance and improve separation efficiency; on the other hand, by constructing a multi-stage membrane chromatographic separation system, chromatographic column separation factors can be effectively increased, the separation time can be shortened, and the cost can be reduced.

The invention relates to the technical field of nuclear power station boric acid preparation, and discloses a nuclear power station boric acid treatment preparation storage system, which comprises: a crystal treatment device, which comprises a pretreatment device and a feeding bin, the discharge port of the pretreatment device is communicated with the feed port of a feeding machine, and the feeding machine is installed on a conveying channel between the pretreatment device and the feeding bin; the solution preparation device comprises a batching box, the batching box is communicated with the feeding bin, and a liquid adding opening is formed in the batching box; the finished product storage device comprises a storage box, the storage box is communicated with the batching box, the storage box is communicated with a circulating pipeline, the two ends of the circulating pipeline are communicated with the storage box, and a circulating pump is installed on the circulating pipeline. A crystal treatment device, a solution preparation device and a finished product storage device are integrated and automatically linked, so that full-process automatic operation of boric acid treatment, preparation and storage is realized. Heavy physical labor of manually carrying a large number of boric acid crystals to a high position for preparation can be avoided, and the labor intensity and health risks of operators are reduced.

The invention relates to a method for producing a metal borohydride from a metal boron oxide. A process for preparing a metal borohydride Me (BH4) n from a metal boron oxide Me (BO2) n, where Me is a metal or a molecule that exhibits metalloid behavior and can be used as a metal, and n is an integer that can correlate with the valence of the metal, where in a first fluidized bed step, the metal boron oxide is provided in a first fluidized bed. In a subsequent second fluidized bed step, the metal boride particles are provided in a second fluidized bed which is fluidized using hydrogen H2 gas in such an environment in which hydrogen chemically reacts with the metal boride particles to provide the metal borohydride.

The present disclosure provides a method of preparing a target compound. The method includes the step of combining (A) an organosilicon component and (B) a catalyst including a boron cluster to give a mixture. The method further includes preparing a reaction mixture including the target compound from the mixture. The organosilicon component (A) includes (A1) a first organosilicon compound having a silicon-bonded C1-C4 alkyl group. When the first organosilicon compound (A1) does not include a silicon-bonded halogen atom, the organosilicon component (A) includes a second organosilicon compound (A2) including at least one silicon-bonded halogen atom. The disclosure further provides a reaction product prepared according to the method.

This invention provides a method and equipment for recovering lithium and boron resources based on the tailings of lithium beneficiation from Jalda stone, relating to the field of solid waste recycling. The lithium resource recovery method based on the tailings of lithium beneficiation from Jalda stone includes the following steps: S1, pulverizing the tailings of lithium beneficiation from Jalda stone to 80-120 mesh, uniformly mixing the powdered tailings with sodium carbonate at a mass ratio of 1:0.3-0.5, and calcining at 500-600℃ for 1.5-2 hours; S2, adding the calcined material and a dilute sulfuric acid solution with a mass fraction of 8%-12% at a solid-liquid ratio of 1:4-6 into an acid-resistant stirred reactor, reacting at 70-85℃ for 40-60 minutes, and then filtering to obtain leaching residue and leachate. The lithium resource recovery method based on Jardalite lithium beneficiation tailings provided by this invention uses Jardalite lithium beneficiation tailings to recover lithium and prepare battery-grade lithium carbonate through a phased leaching, deep purification, lithium carbonization precipitation, and high-temperature roasting process. This fully taps the residual lithium resources in the lithium beneficiation tailings and promotes the coordinated development of the lithium battery industry chain and the boron chemical industry.

The invention belongs to the technical field of lithium ion battery material preparation, and relates to an in-situ boron-fluorine co-doped ternary precursor and a preparation method and application thereof.The preparation method of the in-situ boron-fluorine co-doped ternary precursor comprises the following steps that 1, nickel salt, cobalt salt, manganese salt, a boron source, a fluorine source and deionized water are evenly mixed, and a mixed salt solution is obtained; and (2) mixing a sodium hydroxide solution, a complexing agent solution and the mixed salt solution obtained in the step (1) for reaction, performing solid-liquid separation on a reaction product to obtain a solid phase, and drying the solid phase to obtain the in-situ boron-fluorine co-doped ternary precursor. According to the preparation method, boron and fluorine doping elements are introduced in situ, so that the tap density of the in-situ boron-fluorine co-doped ternary precursor is improved, and the prepared boron-fluorine in-situ co-doped lithium ion battery positive electrode material has excellent electrochemical performance.

Provided are inorganic oxide hollow particles having a carbon content of 0.0060-0.055 mass%.