28 results about "Metaboric acid" patented technology

The invention relates to a rapid filtering device and method for potassium fluoborate production, aiming at the characteristics of slurry containing KBF4 crystal (D50 = 20-50 [mu] m), colloidal metaboric acid (HBO2) and potassium fluosilicate (K2SiF6) impurities prepared by a hydrofluoric acid-boric acid method, the device adopts a sliding block type filter frame and inflatable elastic filter cloth structure, and is matched with a rotary scraper and a hydraulic turning plate mechanism; the method comprises the following steps: controlling the temperature of reaction slurry with the solid content of 15-30wt% to 38-58 DEG C, pumping the reaction slurry into a device, breaking KBF4-K2SiF6 heterogeneous aggregates through 5-22rpm rotary stirring, triggering 0.48-0.82 MPa inflatable extrusion to peel boric acid colloid when the filtering pressure difference reaches 0.3-0.6 MPa, driving a scraper to radially feed 5-18mm crushed pressed cakes after a gas source is closed, further separating crystals and wrapping mother liquor through secondary extrusion (0.42-0.68 MPa), and finally obtaining the high-purity KBF4-K2SiF6 / KBF4-K2SiF6 / KBF4-K2SiF6 / KBF4-K2SiF6 / KBF4-K2SiF6 composite material. And finally, a filter cake with the water content of 15-25wt% is discharged by a hydraulic overturning guide plate (the inclination angle of 25-40 degrees). Compared with a traditional process, the method has the advantages that the B2O3 residual quantity is reduced to be less than or equal to 0.15 wt% (reduced by more than 50%), the filtering efficiency is improved by 2.1-3.2 times, and the method is suitable for a ten-thousand-ton potassium fluoborate production line.

The invention relates to the technical field of fireproof plates, and provides a fireproof plate with high corrosion resistance. The fireproof plate is prepared from the following raw material components in parts by weight: 60 parts of Portland cement, 8 to 12 parts of refractory fiber, 10 to 20 parts of pyrophyllite powder, 8 to 16 parts of functional aggregate, 5 to 8 parts of epoxy resin, 0.5 to 1.5 parts of curing agent, 12 to 16 parts of flame retardant and 20 parts of water, the functional aggregate comprises zirconite powder and calcium metaborate in a weight ratio of (1: 9)-(9: 1). By means of the technical scheme, the problem that in the related technology, a fireproof plate is poor in breaking strength is solved.

The invention discloses an anti-UV hydrolysis-resistant PET functional master batch and a preparation method thereof, UV absorbing groups such as isophorone diester and 2, 4-dihydroxybenzoic acid are introduced to enhance the UV resistance, and neopentyl glycol and trimethylolpropane are introduced to enhance the hydrolysis resistance of a molecular chain. Besides, the Beta molecular sieve, the zinc metaborate and other auxiliaries are utilized, so that the uniform distribution of the light stabilizer and the ultraviolet light absorber in the molecular structure is improved, and the problem that the UV absorption performance and the hydrolysis resistance of the film are not uniform due to molecular arrangement change in the stretching process is effectively avoided. The ultraviolet resistance, the strength and the hydrolysis resistance of the film are improved through the synergistic effect of all the components in the formula, so that the application requirements of PET products in the fields of packaging, electronics, photovoltaics, automobiles, medical instruments and the like are met.

The invention provides a barium metaborate composite structure, a preparation method thereof and an optical device. The barium metaborate composite structure comprises a barium metaborate substrate and an anti-reflection layer or a composite anti-reflection structure arranged on one side surface or two side surfaces of the barium metaborate substrate; the composite anti-reflection structure comprises a first film layer, a second film layer and a third film layer which are stacked in the direction away from the barium metaborate substrate, and the refractive index of the second film layer at the wavelength of 266nm is larger than that of the first film layer and that of the third film layer; the material of the anti-reflection layer, the material of the first film layer and the material of the third film layer respectively and independently comprise metal fluoride, and the refractive index of the metal fluoride at the wavelength of 266 nm is smaller than 1.45. According to the barium metaborate composite structure, the metal fluoride material with the specific refractive index is arranged on the surface of the barium metaborate substrate to serve as the anti-reflection material, and the laser damage resistance threshold value in the ultraviolet 266nm wave band is effectively matched and improved.

The invention belongs to the field of polyurethane materials, and particularly discloses a flame-retardant polyurethane material as well as a preparation method and application thereof. The flame-retardant polyurethane material comprises the phosphorus flame retardant, the melamine polyphosphate and the barium metaborate, the phosphorus flame retardant, the melamine polyphosphate and the barium metaborate have a synergistic effect, a continuous, compact and glassy-state-like carbon barrier layer is formed at the burning position of the material, halogen-free flame retardance of the polyurethane material can be achieved, and molten drops can be effectively prevented. Besides, the polyurethane material disclosed by the invention is proper in component and dosage, so that the material formability is good, bubbles and flame retardant precipitation after the material is formed can be avoided, and the utilization rate of the flame retardant is increased.

A CaB2O4 / Pb3O4 / Mg3B2O6 / C nanocomposite that includes orthorhombic calcium metaborate (CaB2O4), tetragonal lead tetroxide (Pb3O4), magnesium borate (Mg3B2O6), and carbon (C). The CaB2O4 / Pb3O4 / Mg3B2O6 / C nanocomposite includes 55 to 70 atomic percent (at. %) oxygen (O), 5.0 to 12.5 at. % calcium (Ca), 7.5 to 15 at. % magnesium (Mg), 7.5 to 15 at. % lead (Pb), 2.5 to 7.5 at. % boron (B), and 2.5 to 7.5 at. % carbon (C), each based on a total number of atoms in the CaB2O4 / Pb3O4 / Mg3B2O6 / C nanocomposite. The nanocomposite is used in a method of removing organic pollutants and / or heavy metals from water.

A polymer comprising pyridinium salt moieties, wherein the polymer has the following structure: In this structure, R1 and R6 are each N. At least a portion of R2 and R7 groups in the polymer are each negatively charged counterions selected from the group consisting of carboxylates, nitrates, nitrites, azides, metasilicates, tetraborate, perborates, boronates, oxalatob orates, metaborates, phosphorus-containing anions, halides, sulfates, SO4 -2, HSO4 -1, thiosulfate, dithionite, metabisulfite, persulfate, methanesulfonate, dioctyl sulfosuccinate, 3-sulfopropyl ethoxylate laurylphenyl ether, and combinations thereof. R3, R4, R8, R9, R11, R13, R14, R15, and R16 are each selected from the group consisting of H and groups including one or more carbon atoms. R5 and R10 are any group including one or more carbon atoms. The n is an integer from 2 to about 100,000.

A polymer comprising pyridinium salt moieties, wherein the polymer has the following structure: In this structure, R1 and R6 are each N. At least a portion of R2 and R7 groups in the polymer are each negatively charged counterions selected from the group consisting of carboxylates, nitrates, nitrites, azides, metasilicates, tetraborate, perborates, boronates, oxalatob orates, metaborates, phosphorus-containing anions, halides, sulfates, SO4 -2, HSO4 -1, thiosulfate, dithionite, metabisulfite, persulfate, methanesulfonate, dioctyl sulfosuccinate, 3-sulfopropyl ethoxylate laurylphenyl ether, and combinations thereof. R3, R4, R8, R9, R11, R13, R14, R15, and R16 are each selected from the group consisting of H and groups including one or more carbon atoms. R5 and R10 are any group including one or more carbon atoms. The n is an integer from 2 to about 100,000.

According to the ultrathin PET functional master batch and the preparation method thereof disclosed by the invention, UV absorbing groups such as isophorone diester and 2, 4-dihydroxybenzoic acid are introduced, so that the absorption capacity of a molecular chain to ultraviolet rays is enhanced, and meanwhile, the aging resistance of a film is improved. Besides, by utilizing the Beta molecular sieve, the zinc metaborate and other auxiliaries, the uniform distribution of the light stabilizer and the ultraviolet light absorber in the molecular structure is improved, and the non-uniform UV absorption performance of the film caused by molecular arrangement change in the stretching process is effectively avoided. Due to the synergistic effect of the components in the formula, the ultraviolet resistance, strength and thermal stability of the film are improved, the performance uniformity of the film is ensured, and an innovative material solution is provided for preparation of the high-performance ultrathin PET film. According to the preparation method disclosed by the invention, the properties, such as mechanical strength, thermal stability and gas barrier property, of the PET material can be remarkably improved, so that the application requirements of ultrathin products in the fields of packaging, electronics, buildings and the like can be met.

The present invention provides a method for stably producing metaboric acid. In addition, the present invention provides a method for producing a secondary alcohol with good production efficiency by providing a continuous method for establishing a reaction with good reactivity. In addition, the present invention provides a reactor for producing metaboric acid. The method for producing metaboric acid includes i) dehydrating orthoboric acid with a dehydrator in the presence of a saturated aliphatic hydrocarbon to obtain a mixture containing metaboric acid, a saturated aliphatic hydrocarbon, and water; ii) separating the saturated aliphatic hydrocarbon and water after distilling the saturated aliphatic hydrocarbon and water from the mixture; and iii) returning the saturated aliphatic hydrocarbon separated in the process ii) to the process i) so that the content of alcohol components in the saturated aliphatic hydrocarbon is less than 2 mass% in the process i). The method for producing a secondary alcohol uses metaboric acid produced by the method for producing metaboric acid, and the reactor includes two or more reactors capable of being switched to batch and continuous modes.

The invention provides a sodium ion battery positive pole piece and a sodium ion battery, the positive pole piece comprises a positive pole current collector and a positive pole film layer arranged on at least one surface of the positive pole current collector, the positive pole film layer comprises a positive pole active material, a first additive and a second additive, the first additive is at least one of boric acid, metaboric acid and borate, and the second additive is a hydrophobic polymer. According to the invention, the first coulombic efficiency and the cycle performance of the sodium ion battery can be improved.

The invention belongs to the technical field of preparation of a power battery packaging material, and particularly relates to a flame-retardant, self-cleaning and detachable fluorine-containing reversible packaging material for a power battery and a preparation method of the flame-retardant, self-cleaning and detachable fluorine-containing reversible packaging material. The preparation method comprises the following steps: reacting bifunctional fluorine-containing polyol with L-lysine diisocyanate to obtain an isocyanato-terminated prepolymer PU-1, reducing an ester group in the L-lysine diisocyanate into a hydroxyl group through a reduction reaction, reacting with amino-terminated disulfide to form a urea bond skeleton, reacting with metaboric acid to introduce a boric acid ester group, and carrying out a reaction to obtain the polyurethane prepolymer PU-1. Finally, phytic acid is introduced to regulate and control the crosslinking degree, and the fluorine-containing reversible packaging material is prepared. The material combines the characteristics of boric acid ester bonds, disulfide bonds, fluorine elements and phytic acid, and the flame retardance and the reversibility are remarkably enhanced. The prepared material is mainly suitable for packaging materials and other industries, the preparation process is simple and environmentally friendly, and the flame-retardant, self-cleaning and detachable effects are obvious and efficient.

A method for producing organic microelement complexes based on humic acid salts is characterized in that an aqueous solution of lignosulfonate is mixed with dry or aqueous solutions of copper, zinc, manganese, iron, cobalt, ammonium molybdate sulfates, boric acid or potassium metaborate to achieve a total mass concentration of microelement ions in the range of 0.5-4.0% of the absolutely dry matter. An alkaline agent is added. The resulting working solution undergoes intensive mixing with cavitation treatment. The solution is loaded into a reactor, sealed, pressurized to 22 bar, and heated to 150°C. The synthesis of microelement complexes based on humic acid salts occurs for 120-150 minutes at a pressure of 22-23 bar, temperature of +170-180°C with an air flow rate of 60-80 1 / h passing through the reactor. The synthesis process is stopped when the pH drops below 8.5 by turning off the heating and air supply. The finished product is unloaded after natural cooling below 70°C. The invention enhances the stability of organic complexes based on humic acids with high concentrations of retained biogenic microelements.

The application discloses a kind of core-shell nanostructure magnesium hydride-magnesium borohydride hydrolysis hydrogen production materials and preparation method thereof.A kind of core-shell nanostructure magnesium hydride-magnesium borohydride hydrolysis hydrogen production material preparation method, comprising the following steps: magnesium hydride is loaded into ball mill jar vacuum, then borane gas is filled in ball mill jar, ball milling treatment is carried out, and the core-shell nanostructure magnesium hydride-magnesium borohydride hydrolysis hydrogen production material is obtained.The application uses solvent-free gas-solid reaction, ball milling method, simple, low cost;This composite method not only avoids the direct use of expensive magnesium borohydride, but also overcomes the shortcomings of other composite systems, and even improves the theoretical hydrogen release capacity;The in-situ formed magnesium borohydride nanoshell plays a key role in improving the hydrolysis kinetics of magnesium hydride by releasing heat and forming a local magnesium ion and metaborate ion solution environment.

The utility model provides a kind of controllable temperature field structure of large size low temperature phase barium metaborate crystal growth, solve the gradient heat demand in the process of BBO crystal growth that traditional fixed heat field cannot satisfy, its main scheme includes: furnace body and BBO seed crystal, the cavity is opened in the furnace body to place has crucible, the melt is built-in in the crucible, the BBO seed crystal is placed in the melt, and its top is connected to furnace body outside by vertical seed crystal stem, the inner wall of furnace body is fixed with two groups of heating elements on the corresponding BBO seed crystal place symmetrical formula, two groups of the heating element is symmetrical with the BBO seed crystal as center in height axial direction, and temperature measuring couple is set in the interval center between two to measure the temperature of inner cavity, the water cooling coil is also provided on the outside of corresponding heating element of furnace body, and the water cooling coil center height corresponds with the BBO seed crystal.

According to the epitaxial resistivity monitoring chip and the preparation method thereof, a solid boron source chip is adopted to react in a wet oxygen environment to generate metaboric acid, the metaboric acid is diffused to the surface of a silicon substrate and forms thin-layer borosilicate glass, boron atoms generated by decomposition of the metaboric acid are uniformly diffused into crystal lattices of the silicon substrate, and P-type thick boron doping is achieved; the method comprises the following steps: sequentially removing borosilicate glass and pollutants, carrying out dry oxygen environment boron doping source re-diffusion on a silicon substrate to form an oxide layer containing trace boron impurities, removing the oxide layer and pollutants, forming the oxide layer through reaction, and carrying out lattice repair and electrical property optimization to obtain the high-performance P well. And finally, a surface oxide layer and pollutants are removed, and preparation of the P-type monitoring sheet is completed. The method effectively solves the problem that in the prior art, an epitaxial resistivity monitoring piece cannot be repeatedly used, silicon substrate waste can be reduced, the detection precision of each time of use can be guaranteed, and the long-term stable monitoring requirement of the epitaxial process is met.

This invention discloses a method for preparing a dendritic copper oxide catalyst and its application in the electrocatalytic reduction of nitrate to ammonia. The method includes the following steps: S1, preparing aqueous solutions of metaborate and copper source compound using metaborate and a copper source compound respectively, then adding the aqueous solution of metaborate to the aqueous solution of copper source compound, stirring and dispersing to obtain an emulsion; S2, placing the obtained emulsion in a hydrothermal reactor and carrying out a hydrothermal reaction at a certain temperature to obtain the dendritic copper oxide catalyst. This invention utilizes BO2... ‑ Adjusting the microstructure and electronic structure of Cu-based oxide catalysts significantly improved the electrocatalytic performance of copper catalysts for NO3-. ‑ The technical effects of conversion for ammonia production: The prepared dendritic copper oxide catalyst exhibited excellent ammonia product selectivity and NH3 yield in the electrocatalytic nitrate reduction reaction.

The present application relates to the technical field of inorganic glass polishing powder preparation, in particular to a long-acting anti-abrasion glass polishing powder and a preparation method thereof. The present application overcomes the problems of traditional cerium-based polishing powder, such as easy settlement and pipeline blockage during processing, and lack of long-acting anti-abrasion protection after polishing. By in-situ combination and addition of sodium lignosulfonate and double-end epoxy polyethylene glycol in the precursor liquid, cross-linking reaction is carried out, and particle settlement is inhibited by steric hindrance and electrostatic repulsion. In addition, calcium metaborate or barium metaborate is added as a boron-containing fluxing component during pyrolysis and multiphase eutectic calcination, which locks the lamellar wear-reducing component in the inorganic skeleton, and integrates the cutting phase and the lubricating phase. Finally, the continuity of the processing flow is improved, and under the shear force, the glass surface migrates to form a film to play a dynamic lubrication role, effectively reducing the scratch width and inhibiting the rise of haze after long-term sand particle erosion.

The invention discloses a biomass-based hard carbon material with a closed-pore structure optimized by a boron-based template agent, a preparation method of the biomass-based hard carbon material and application of the biomass-based hard carbon material in a sodium-ion battery. The preparation method comprises the following steps: (1) carrying out solid-liquid mixing on biomass and an aqueous solution of a boron template agent, and drying; the selected boron template agent comprises at least one of boric acid, borax, triethyl borate, trimethyl borate, metaboric acid, sodium metaborate and potassium borate. And (2) carbonizing the dried mixed material twice, naturally cooling, pickling, and removing the template to leave a rich pore structure. And performing high-temperature re-carbonization on the carbon material, cooling, and sequentially performing crushing, acid pickling, water washing and drying. The obtained biomass-based hard carbon material has a pore structure with a large specific surface area and closed pore volume, the defect density of a graphite structure is reduced to slow down sodium death caused by an SEI film, and more pore-filled sodium storage sites are provided, so that the first coulombic efficiency and sodium storage performance of a battery are improved.

The invention provides an aluminum barium rubidium metaborate compound, an aluminum barium rubidium metaborate nonlinear optical crystal and a preparation method and application of the aluminum barium rubidium metaborate nonlinear optical crystal. The chemical formula of the compound is Rb2Ba2Al6B6O21, the molecular weight is 1008.36, and the compound is prepared through a solid-phase synthesis method or a vacuum packaging method; the chemical formula of the compound of the crystal is Rb2Ba2Al6B6O21, the molecular weight is 1008.36, the compound belongs to a monoclinic system, the space group is P21, the cell parameters are as follows: a = 4.981 (7), b = 15.391 (2), c = 14.098 (17), beta = 100.1, the unit cell volume is 1064.1 (2) 3, the frequency-doubled effect of the crystal is about 1.5 times that of KH2PO4 (KDP), the ultraviolet cut-off edge is lower than 190 nm, the crystal is grown by adopting a high-temperature solution method, a solid-phase synthesis method or a hydrothermal method, the chemical stability of the crystal is good, and the crystal is suitable for industrial production. The short-wavelength nonlinear optical crystal can be applied to an all-solid-state laser as a short-wavelength nonlinear optical crystal.

The application discloses a method for efficiently capturing oxygen, in which anion functionalized ionic liquid containing Mo, W, B and V is used as an absorbent to absorb O2; during the absorption process, the absorption pressure is 0.02-0.1 MPa, the absorption temperature is 20-100 DEG C, and the absorption time is 2-8 h; the desorption process is carried out under 0.02-0.1 MPa, the desorption temperature is 70-120 DEG C, and the desorption time is 0.5-4 h; the functionalized ionic liquid is composed of alkyl quaternary phosphonium cation and molybdate, tungstate, metaborate and orthovanadate. The application realizes efficient and recyclable capture of O2 by using the coordination of O2 and anions, has the advantages of high absorption efficiency, large absorption capacity, wide use environment for absorption of O2, wide absorption temperature control range, and the like, and can reduce the viscosity of the system after absorption of O2, which is beneficial to desorption and recycling of O2.

This invention discloses a black hot spring bath concentrate, its preparation method, and its application, relating to the field of personal care products technology. It comprises component A, an active black hot spring concentrate, and component C, a sulfide and humic acid composite stabilization system. Component A must contain humic acid with a content of ≥500 mg / L metasilicic acid, 5-15 mg / L fluoride ions, ≥10 mg / L total hydrogen sulfide, ≥20 mg / L metaboric acid, and ≥100 mg / L total organic carbon. Component C consists of selenite, polyphenolic antioxidants, and metal ion chelating agents. This invention utilizes a low-temperature membrane enrichment-bioenzymatic hydrolysis coupling-nano-stabilization integrated technology to fully preserve the quaternary characteristic component spectrum of black hot springs ("metasilicic acid-fluoride-sulfide-humic acid"), and uniquely employs a composite stabilization technology targeting the dual-active system of "sulfide-humic acid." It can be stored for a long time at room temperature and pressure, exhibiting excellent physical stability and long-lasting efficacy, and demonstrating a clearly targeted therapeutic effect of black hot springs.

A sodium ion battery positive electrode sheet and a sodium ion battery. The positive electrode sheet comprises a positive electrode current collector and a positive electrode film layer arranged on at least one surface of the positive electrode current collector, the positive electrode film layer comprising a positive electrode active material, a first additive and a second additive, the first additive being at least one of boric acid, metaboric acid and a borate, and the second additive being a hydrophobic polymer.

This invention discloses a self-healing grout for building structures and its preparation process, belonging to the field of building materials technology. The grout comprises cement-based cementitious materials and a self-healing solvent powder. The self-healing solvent powder is prepared by grafting furfural-furan-methanol oligomers onto the surface of silanized wollastonite, and then compounding it with a lithium tetraborate-glycerol complex under acidic conditions. The dry grout comprises silicate cement, quartz sand, fly ash, silica fume, an expanding agent, the self-healing solvent powder, and a high-efficiency water-reducing agent. This invention utilizes an organic-inorganic hybrid supramolecular cross-linked microparticle structure, which sequentially undergoes borate ester hydrolysis, coordination dissociation, wollastonite dissolution, and calcium metaborate precipitation and expansion during crack seepage, achieving efficient crack filling and repeated self-healing. It is independent of microorganisms, exhibits strong robustness to cement-based highly alkaline environments, and the repair products form chemical bonds with the matrix, significantly improving the long-term durability and mechanical recovery capacity of the grout.

[Problem] To provide: a catalyst which has high hydrogen generation efficiency; a method for producing the catalyst; a method for producing a reusable metaborate; a hydrogen generator which is provided with the catalyst; and a fuel cell system which is provided with the hydrogen generator. [Solution] According to one embodiment of the present invention, there is provided a catalyst which is used for the purpose of generating hydrogen from a borohydride salt and water, the catalyst containing a metal oxide as a main component and a metal boride which is supported by the metal oxide.

A sodium ion battery positive electrode sheet and a sodium ion battery. The positive electrode sheet comprises a positive electrode current collector and a positive electrode film layer arranged on at least one surface of the positive electrode current collector, the positive electrode film layer comprising a positive electrode active material, a first additive and a second additive, the first additive being at least one of boric acid, metaboric acid and a borate, and the second additive being a hydrophobic polymer.

The invention belongs to the technical field of functional food, and particularly relates to fructose borate and a preparation method thereof, the molecular formula of the fructose borate is M [(C6H10O6) 2B] x.nH2O, M is IA family, IIA family or transition metal element, X is 1-2, and n is 0-5. The preparation method comprises the following steps: mixing fructose and metaborate in water according to a certain molar ratio, adjusting the pH value to 3-7 by adopting an acid catalyst, carrying out catalytic reaction at 0-80 DEG C for 2 hours, filtering the reaction liquid through an ultrafiltration membrane, and carrying out spray drying to obtain a target product. The method is simple in process, mild in reaction condition, convenient in post-treatment and suitable for industrial production. The obtained fructose borate is high in purity and good in water solubility, can provide various functional components such as fructose, boron and mineral substances at the same time, and has good bioavailability and application prospects.

This application discloses a metal facing porcelain powder, a preparation method thereof, and a metal facing porcelain, thereby improving the yield rate of metal porcelain teeth. The metal facing porcelain powder is a microcrystalline glass containing a main crystal phase of barium metaborate (BaB2O4) and a secondary crystal phase of barium silicate (Ba2Si3O8). By precipitating two crystals of barium metaborate and barium silicate, the microcrystalline glass has a high thermal expansion coefficient, thereby matching the thermal expansion coefficient of the cobalt-chromium alloy substrate. The thermal expansion coefficient of the metal facing porcelain is 12.5×10 ‑6 ℃ ‑1 ~13.5×10 ‑6 ℃ ‑1 (Room temperature ~ 500℃), porcelain baking temperature is 720℃ ~ 750℃.