65 results about "Oxoacid" patented technology

The present invention relates to the use of at least one oxoacid reducing element, and optionally a salt of the oxoacid reducing element, in a molten chloride fuel salt for a molten-salt nuclear fission reactor (MSR). The present invention also relates to a process of nuclear fission within a molten-salt nuclear fission reactor (MSR), said process being characterized in that it is carried out within the MSR reactor, placed in which is an oxoacid reducing element, and optionally a salt of the oxoacid reducing element. The present invention further relates to a molten-salt nuclear fission reactor (MSR) comprising a molten chloride fuel salt, and a mixture comprising the aluminum metal, and its oxidized form, as an oxoacid reducing element, and optionally a salt of the oxoacid reducing element.

The application discloses a phosphate-based dry film lubricating coating and preparation and application thereof. The coating is obtained by curing components with the following mass fractions, wherein the components consist of the following ingredients: phosphate binder 15-18 parts, sulfide 3-5 parts, silver powder 4-6 parts, oxygen-containing acid salt 1.5-3.5 parts, and metal oxide 0.2-0.32 parts, antioxidant 0.6-1.2 parts, and surfactant 0.1-0.2 parts, and the rest is solvent. The application solves the problems of weak adhesion between the existing coating and the substrate, wide temperature range lubrication from room temperature to 800 DEG C, large friction coefficient, short wear life and high cost. The coating has good adhesion to the substrate material, excellent flexibility and impact resistance, is environment-friendly, low-cost and has excellent friction-reducing and wear-resisting performance, has a low friction coefficient from room temperature to 800 DEG C, especially a friction coefficient < 0.16 at 800 DEG C, and has a long wear life.

The present application relates to a perovskite cell, a photovoltaic module, a photovoltaic system, an electrical apparatus, and a power generation apparatus. The perovskite cell comprises a hole transport layer, a passivation layer, and a perovskite material layer which are stacked. The passivation layer contains an ammonium salt compound. In the ammonium salt compound, an anionic group comprises a group formed after at least one hydroxyl group in at least one oxyacid-containing group in a compound represented by formula (1) loses hydrogen, and a cationic group comprises a group formed after an amino group in a compound represented by formula (2) gains hydrogen. The perovskite cell has excellent photoelectric conversion efficiency and stability.

This invention discloses a method for preparing ZSM-5 molecular sieves using a microwave-assisted method with desilication solution, comprising the following steps: First, pretreatment of the desilication solution: the desilication solution is mixed with an oxyacid to adjust the pH to 9-11.5, a template agent is added and mixed evenly to obtain an initial gel; Second, preparation of the ZSM-5 molecular sieve: the initial gel obtained in the first step is placed in a microwave synthesizer for aging with high-speed stirring; the aged solution undergoes a crystallization reaction, followed by filtration, washing, drying, and high-temperature calcination to obtain the ZSM-5 molecular sieve. This invention uses desilication solution as a raw material to prepare ZSM-5 molecular sieves, saving material costs and providing a new approach for the high-value utilization of desilication solution. Furthermore, by utilizing microwave-assisted synthesis on the basis of the traditional hydrothermal method, the time cost is effectively shortened.

The invention belongs to the technical field of electrolyzed water, and particularly relates to an electrolyte additive for improving the reaction performance of electrolyzed water, an electrolyte, an electrolyte solution and a method for improving the reaction performance of electrolyzed water. The additive comprises nonmetal oxosalts (sulfate, phosphate, borate, selenate, silicate, carbonate, perchlorate, trifluoroacetate and the like) and an aqueous solution of the nonmetal oxosalts, and is used as an electrolyte additive for water electrolysis reaction with KOH or NaOH as an electrolyte. The invention provides application of oxysalt to improvement of oxygen evolution activity and stability of electrolyzed water. In particular, the device is also suitable for electrolytic reactions carried out at high and low temperatures. Due to the addition of the oxysalt, the oxygen evolution reaction potential is reduced, the charge transfer resistance is reduced, the electron transmission rate is increased, and relatively high chemical reaction kinetics is achieved, so that the reaction activity is favorably improved.

The present invention provides an electrochemical oxygen reduction catalyst having high proton conductivity and high durability. One embodiment of the present invention relates to an electrochemical oxygen reduction catalyst comprising a catalytic metal that has oxygen reduction activity and a modification layer that modifies the catalytic metal, wherein the modification layer contains a nitrogen-containing cyclic organic compound, or a polymer thereof, or a cation thereof, and an unsubstituted oxoacid or an anion thereof. Another embodiment of the present invention relates to a fuel cell comprising at least: a cathode electrode catalyst layer containing the electrochemical oxygen reduction catalyst according to the one embodiment of the present invention; an anode electrode catalyst layer; and an electrolyte membrane disposed between the cathode electrode catalyst layer and the anode electrode catalyst layer. Still another embodiment of the present invention relates to a method for producing the electrochemical oxygen reduction catalyst according to the one embodiment of the present invention, the method including a modification step in which a catalytic metal containing platinum or a platinum alloy, and a modifier containing a nitrogen-containing cyclic organic compound, or a polymer thereof, or a cation thereof, and an unsubstituted oxoacid or an anion thereof are mixed to modify the catalytic metal.

The purpose of the present invention is to provide a technique whereby the decomposition of a surfactant can be greatly suppressed without adding a stabilizer. The problem is solved by a method for suppressing decomposition of a surfactant in a cleaning solution for aluminum or an aluminum alloy, the cleaning solution containing an inorganic acid, iron ions, and 0.1-10 g / L of the surfactant, the cleaning solution having a pH of 2 or less. The method includes a step of adding one or more oxoacid salts selected from the group consisting of monooxygenated acid salts and diooxygenated acid salts to the cleaning solution.

The application discloses an isomerization catalyst and a preparation method and application thereof, and belongs to the technical field of catalysts. The isomerization catalyst comprises a carrier and an active component; the active component is a transition metal oxide, and the transition metal is one or more of Mn, Ir and Cu; the carrier is a composite metal oxide and / or a metal oxyacid salt; the composite metal in the composite metal oxide comprises an element A and an element B; and the metal oxyacid salt comprises a metal cation and a metal oxyacid anion. The isomerization catalyst is used for a gas phase catalytic cis-1-chloro-3,3,3-trifluoropropene isomerization reaction to generate trans-1-chloro-3,3,3-trifluoropropene, has high conversion rate, high selectivity, a service life of more than 1000 hours in continuous use, and excellent anti-coking capacity, thermal stability and anti-poisoning performance.

This invention belongs to the field of oxyacid synthesis technology of phosphorus, specifically relating to a method for producing phosphorous acid. The production method includes: (1) adding a metal precursor, organic ligand, reaction promoter, structure directing agent and swelling resistant agent to a pore-forming agent and heating to react, to obtain a mixture; then mixing the mixture with a polymer monomer, crosslinking agent and initiator to obtain an oil phase for later use; mixing a dispersant with water and removing oxygen to obtain an aqueous phase for later use; (2) mixing the oil phase and the aqueous phase to carry out a crosslinking reaction to obtain a crude product; (3) washing, acidifying and vacuum drying the crude product to obtain a porous polymer carrier; (4) after the porous polymer carrier swells in water, adding phosphorus trichloride to it, carrying out a heat preservation reaction, and post-treatment to obtain phosphorous acid. This invention improves the production efficiency of phosphorous acid while ensuring a high yield of phosphorous acid by preparing a porous polymer carrier and using it as a medium for the hydrolysis of phosphorus trichloride to prepare phosphorous acid.

The present invention relates to a method of adjusting the oxoacidity of a molten metal hydroxide salt, the method comprising the steps of: estimating a target concentration of at least one of H2O, O2—, and OH— in a molten salt of a metal hydroxide; providing an oxoacidity control component; and contacting the oxoacidity control component with the molten salt of a metal hydroxide to adjust the oxoacidity of the molten salt of a metal hydroxide. The method allows better utilisation of the available temperature range for a molten salt of a metal hydroxide by reducing the corrosive nature of the metal hydroxide.

The invention relates to a perovskite cell, a photovoltaic module, a photovoltaic system, a power utilization device and a power generation device. The perovskite cell comprises a hole transport layer, a passivation layer and a perovskite material layer which are arranged in a stacked mode. The passivation layer contains an ammonium salt compound; in the ammonium salt compound, an anion group comprises a group formed after at least one hydroxyl group in at least one oxyacid group in a compound shown in a formula (1) loses hydrogen, and a cation group comprises a group formed after an amino group in a compound shown in a formula (2) obtains hydrogen. The perovskite cell has excellent photoelectric conversion efficiency and stability.

The invention belongs to the technical field of hydrates, and particularly relates to a method for removing crystal water of an inorganic hydrate at low temperature and simultaneously realizing structural transformation to obtain a stable anhydride. The preparation method comprises the following steps: mixing inorganic hydrate and acid liquor to obtain a mixture; the acid liquor comprises inorganic acid and a solvent, the inorganic acid is inorganic oxyacid corresponding to oxyacid radicals of the inorganic hydrate, the solvent is water or an aqueous solution, and the aqueous solution is a solution formed by water and polyol; covering the mixture and standing to obtain a material after standing; and carrying out heat treatment on the material after standing to obtain an intermediate product which comprises a stable anhydrous substance corresponding to the inorganic hydrate and an acid solution after the reaction is finished. According to the method provided by the invention, dehydration and structural transformation of the inorganic hydrate can be realized at a relatively low temperature, so that energy can be remarkably saved, carbon emission can be reduced, conditions in the whole reaction process are milder, the method is easier to implement, equipment investment is reduced, and the method is suitable for industrial application.

The invention relates to a solar cell, a power generation device and a power utilization device. The solar cell comprises a hole transport layer and a light absorption layer which are stacked in sequence; one side, close to the light absorption layer, of the hole transport layer comprises a first hole transport sub-layer, the first hole transport sub-layer comprises a functionalized hole transport material, and the functionalized hole transport material comprises a polyaromatic compound with a structure as shown in a formula (1); each Ar is independently a p + 2 valent aromatic group; each p is independently 0 or a positive integer, the sum of the n p is a positive integer, and n is an integer selected from 3 to 10; each A is independently selected from an oxyacid group or an oxyacid salt; m is an integer selected from 0 to 10; each L is independently a divalent linking group, and each L independently provides a spacer atom or a spacer ring; and S01 and S02 are respectively and independently end-capping groups. The solar cell has excellent photoelectric conversion efficiency and performance stability.

The present invention relates to a method for obtaining a bath of molten chloride salts comprising at least one actinide in which the oxidation state and / or degree of oxidation of said at least one actinide are predetermined according to the intended application, comprising the following steps: (a) establishing, for said at least one actinide, its potential-oxoacidity diagram at a given temperature T in a bath of molten chloride salts, (b) from the potential-oxoacidity diagram established in step (a), defining the potential-oxoacidity domain in which said at least one actinide is in the predetermined oxidation state and / or degree of oxidation, (c) selecting at least three different compounds which are different from said at least one actinide setting, at the temperature T, the potential and oxoacidity of the bath of molten chloride salts in the domain defined in step (b), it being possible for one of said at least three compounds to be the chloride ion contained in the bath of molten chloride salts, then (d) introducing, into a bath of molten chloride salts comprising said at least one actinide at the temperature T, said at least three compounds selected in step (c). The present invention relates to the use of various mixtures or compositions in the preparation of a nuclear fuel, during its operation or else during its reprocessing.

This invention relates to the field of organic synthesis and discloses a method for preparing bifenthrin. The method includes: contacting kungfu acid and 2-methyl-3-phenylbenzyl alcohol in the presence of a catalyst composition to carry out an esterification reaction; wherein the catalyst composition includes component A and component B; wherein component A is selected from oxyacid esters of group IVB elements and / or compounds formed by group IVB elements and alcohols; wherein component B is selected from at least one of inorganic salts of copper, oxides of copper, oxides of tin, and inorganic salts of tin. The bifenthrin prepared by this method has a high yield (>98%), high purity (up to 99.4%), and produces fewer bifenthrin isomers (<0.5%), meeting market requirements. The entire process is highly efficient and environmentally friendly.

This invention provides a high-temperature stabilizer for sulfonated drilling fluids, its preparation method, and its application. The stabilizer comprises low-valent sulfur oxyacid salts and hydroxyalkyl sulfonates. The high-temperature stabilizer for sulfonated drilling fluids is prepared according to the following steps: mixing low-valent sulfur oxyacid salts and carbonyl compounds in water, adding an inorganic alkali to adjust the pH to 8-10, and reacting under high-temperature sealed conditions to obtain the high-temperature stabilizer for sulfonated drilling fluids. The low-valent sulfur oxyacid salts include divalent sulfur oxyacid salts and / or tetravalent sulfur oxyacid salts; the carbonyl compounds include aldehydes and / or ketones; the molar ratio of sulfur in the low-valent sulfur oxyacid salts to the carbonyl groups in the carbonyl compounds is (1.2-2.0):1. The high-temperature stabilizer in this invention is a composition formed by low-valent sulfates and hydroxyalkyl sulfonates. This composition can simultaneously eliminate the active hydroxymethyl and hydrogen atoms on the phenolic ring structure of the sulfonated material and can also inhibit the desulfonation reaction of the treatment agent.

The invention discloses an isocyanate curing agent, which is prepared from the following components in parts by weight: 100 parts of isocyanate, 0.03 to 0.11 part of oxyacid polymerization inhibitor, 8 to 35 parts of ester organic compound solvent and 0.10 to 0.16 part of polyol ester modifier. According to the isocyanate curing agent disclosed by the invention, a proper amount of oxyacid is added as a polymerization inhibitor, so that the self-polymerization reaction of isocyanate can be effectively inhibited; a chemical environment for inhibiting reaction with water can be established in an isocyanate system, so that the isocyanate and the water are effectively prevented from chemical reaction, the generation of carbon dioxide gas is reduced, the defects of bubbles, bubbling and the like of a product are avoided, and the appearance quality of the product is improved. The isocyanate curing agent disclosed by the invention is applied to casting production of steel castings, and the mechanical property, the curing property and the like are obviously improved. In the actual molding process, compared with an unmodified isocyanate curing agent, the isocyanate curing agent disclosed by the invention has the advantages that the molding sand strength is improved by more than 10%, and the sand mold curing and drawing time is shortened by about 15%.

In examples, a microelectromechanical systems (MEMS) device comprises a moveable element configured to contact a portion of a surface, and a film formed of a self-assembled lubricant, the lubricant comprising a compound having (i) an oxoacid moiety and (ii) a hydrophobic moiety with an A value of equal to or greater than about 3 kilocalories / mole on the portion of the surface.

This invention relates to the field of battery technology, specifically to a lithium iron phosphate (LFP) cathode material and its preparation method, cathode sheet, battery, and power device. The LFP cathode material comprises: active particles, each containing a core of lithium iron phosphate; a first coating layer covering the surface of the core, and a second coating layer covering at least a portion of the surface of the first coating layer; wherein the first coating layer comprises a bismuth-based oxyacid salt, and the second coating layer comprises a platinum-based compound. The LFP cathode material of this invention, by sequentially providing a first coating layer containing a bismuth-based oxyacid salt and a second coating layer containing a platinum-based compound on the core of lithium iron phosphate, can effectively improve the ionic and electronic conductivity of the LFP cathode material under extreme low-temperature conditions, thereby improving its discharge capacity, cycle life, and rate performance.

The invention relates to the technical field of corrosion protection, in particular to an aluminum alloy surface pretreatment method based on corrosion inhibitor impregnation reaction, which comprises the following steps: before growing an LDH film layer, immersing an aluminum alloy in an oxyacid salt corrosion inhibitor solution for pretreatment to generate a protective film on the surface so as to reduce the potential difference between different areas on the surface of the aluminum alloy; more uniform electrochemical distribution is promoted, so that compact and uniform growth of a subsequent Zn-Al-LDH film layer is promoted. The corrosion inhibitor reacts with metal cations generated by dissolving active IMC on the surface of the aluminum alloy to form a protective film, the protective film covers the IMC, the potential uniformity of the surface of the aluminum alloy is improved, the defects of a generated LDH film layer are reduced, the quality is improved, and the corrosion resistance is improved.

Compositions and methods for solvent-based molybdenum etching are provided. A composition comprises a phosphorus oxoacid, an oxidant, and at least 50% by weight of a solvent based on a total weight of the composition. The solvent comprises a compound having at least one sulfur-oxygen double bond.

This invention discloses a method for using metal oxyacid anions to inhibit chlorine corrosion of metals and its application. Specifically, it discloses a novel use of metal oxyacid anions to alleviate the chemical or electrochemical corrosion of metals by chlorine-containing solutions. In this invention, metal oxyacid anions form polymetallic oxyacid anion clusters during electrolytic or electrochemical corrosion, revealing that these clusters possess specific chemical adsorption properties on the surface of metal electrodes or metal substrates, and exhibit strong resistance to chlorine corrosion. ‑ The electrostatic repulsion and steric hindrance effects of the Cl- at the interface can reduce the interfacial Cl- ‑ The concentration can thus alleviate chlorine corrosion of metals and extend the service life of metal materials in chlorine-containing environments.

The invention relates to a method for reducing nitrate in waste water, and the method comprises the following steps: adding a first reducing agent into the waste water, and adjusting the pH value of the waste water to 6.5-7.5 to obtain waste water to be treated; carrying out contact catalytic reduction reaction on the wastewater to be treated and a catalyst; wherein the first reducing agent comprises oxysalt of sulfur; the catalyst comprises a carrier and an active component loaded on the carrier, the active component comprises an iron element and a noble metal element, and the noble metal element is one or more of ruthenium, palladium and tin. The method disclosed by the invention is simple and easy to implement, mild in operation condition, free of an oxygen-free environment and limitation of an over-high or over-low pH value, relatively high in tolerance to the content of organic matters in the wastewater and salinity, and high in removal rate of nitrate.

The invention aims to solve the problem of anode material during electrolysis of oxysalt aqueous solution. The anode in the technology does not need metal titanium, iridium, tantalum, platinum, tin, antimony or oxides thereof, but directly uses relatively cheap metal lead. The main purposes of reducing the cost of the related electrolysis process, increasing the safety current during electrolysis and improving the efficiency during electrolysis are achieved. The technology has great significance in the application of industrial acid production, alkali production, hydrogen production, oxygen production and hydrogen peroxide production.

The invention discloses a transition metal nanoparticle graphene oxide self-assembled catalytic membrane for effectively removing oxysalt in a water body, and belongs to the technical field of water treatment functional membranes. A transition metal nanoparticle (such as iron, manganese and the like) dispersion liquid and a graphene oxide dispersion liquid are directly mixed, and the composite catalytic membrane is formed through self-assembly by utilizing the interaction between nanoparticles and graphene oxide lamellas. Metal ion adsorption and in-situ reduction steps are not needed, the process is simple and efficient, and large-scale preparation is easy. The obtained composite membrane has a remarkable nano confinement effect, can efficiently activate sulfite to generate reducing free radicals and rapidly degrade oxysalt pollutants such as bromate in a water body, the removal rate of 80 micrograms / L bromate in 3 minutes exceeds 96%, and the composite membrane has good stability and reusability.

A method for producing halogen oxyacid, which includes a step of continuously supplying and mixing an organic alkali solution and a halogen and continuously collecting a reaction solution containing halogen oxyacid, and an production apparatus of halogen oxyacid, which includes a reactor, a means of supplying an organic alkali solution to the reactor, a means of supplying a halogen to the reactor, and a means of collecting a reaction solution for taking out the reaction solution from the reactor, in which the organic alkali solution and the halogen are continuously supplied by the means of supplying an organic alkali solution and the means of supplying a halogen, respectively, to the reactor so as to be mixed therein such that a solution containing halogen oxyacid is generated as a reaction solution, and the reaction solution is continuously collected by the means of collecting a reaction solution are provided.

The invention discloses a method for reducing the viscosity of a zinc salt treatment system slurry single aluminum coating. The method comprises the following steps: grinding a titanium dioxide kiln product treated by depolymerized zinc oxide salt, adding a dispersing agent in a pulping process before wet grinding, and carrying out wet grinding including ball milling and sanding; pre-treating the wet-ground slurry, adding oxyacid and salt compounds of silicon and a precipitant into a coating tank in a parallel flow manner, and generating a silicon precipitate on the surface of titanium dioxide; and carrying out aluminum oxide inorganic coating on the pretreated titanium dioxide slurry. According to the scheme, the method comprises a pretreatment step carried out before single aluminum coating, and silicon precipitates are generated on the surface of titanium dioxide. The method can solve the problem of stirring failure caused by overhigh slurry viscosity in the single aluminum coating process of titanium dioxide in a zinc salt treatment system in the prior art.

The invention belongs to the technical field of electrochemical wastewater treatment, and relates to a Sm diatomic electrocatalyst, a preparation method thereof and a method for treating oxysalt wastewater. The catalyst takes nitrogen-doped carbon as a carrier, and Sm-Sm diatomic sites are anchored in a carbon skeleton in an atomic scale manner through Sm-N coordination. The preparation method comprises the following steps: self-assembling Sm2O3 and a nitrogen-containing organic matter in a buffer solution to obtain a precursor, carrying out high-temperature carbonization in an inert atmosphere, and then carrying out acid etching to remove redundant oxides so as to obtain the high-density Sm diatomic site. The catalyst is loaded on a conductive substrate as a cathode, and negative potential is applied to an aqueous solution containing nitrate, bromate and / or perchlorate, so that the nitrate can be efficiently reduced into nitrogen, the bromate and the perchlorate are reduced into corresponding halide ions, and the catalyst is prepared. The catalyst has the advantages of hydrogen evolution reaction inhibition, high oxysalt removal rate, good target product selectivity, excellent stability and the like.

The invention discloses a preparation method of a DOPO (9, 10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide) derivative flame retardant, which belongs to the technical field of oxygen-containing acid ester of phosphorus and comprises the following steps: preparation of a monosubstituted intermediate, biphosphoramidation reaction and post-treatment. The biphosphoramidation reaction method comprises the following steps: dissolving a monosubstituted intermediate into xylene, then adding DOPO, ZnCl2 and DBU, stirring for 20-30 minutes at 50-60 DEG C, then adding DBU-imidazolium salt, stirring and reacting for 3.2-3.8 hours at 80-90 DEG C, gradually turning the solution into light yellow along with the proceeding of the reaction, and carrying out reduced pressure distillation to remove xylene to obtain a crude product. The target product prepared by the method is high in selectivity, the generation of byproducts is reduced, and the purity of the product is improved; the yield of the prepared DOPO derivative is 91.2 to 92.4 percent, and the purity of the prepared DOPO derivative is 93.9 to 95.8 percent.

The present invention pertains to a grain-oriented electrical steel sheet having a base steel sheet, a glass cover film formed on the surface of the base steel sheet, and an insulating cover film formed on the surface of the glass cover film, the base steel sheet having a sheet thickness of 0.15-0.35 mm, the insulating coating film contains a metal phosphate, amorphous silica, and one or more oxyacid compounds selected from among tungsten, vanadium, molybdenum, and zirconium, the amorphous silica is 30-150 parts by mass per 100 parts by mass of the metal phosphate, the total of the oxyacid compounds is 1.0-50 parts by mass, and the moisture content of the insulating coating film is 0-0.04% by mass.