49 results about "Dimethylglyoxime" patented technology

The invention relates to the technical field of fertilizers, and discloses a coating material, a preparation method and application of the coating material in a trace element coating for potassium chloride particles. The preparation method comprises the following steps: reacting isophorone diisocyanate with polycaprolactone diol, tartaric acid and dimethylglyoxime to prepare a polyurethane prepolymer, continuously reacting the polyurethane prepolymer with chitosan oligosaccharide Schiff base to obtain chitosan oligosaccharide modified polyurethane, and mixing the chitosan oligosaccharide modified polyurethane, a cross-linking agent, silane modified isocyanate and a trace element solution to obtain the coating material. The coating material is good in mechanical property, contains trace elements, has a controlled release effect on the potassium chloride granulated fertilizer, and can be applied to the potassium chloride granulated fertilizer as a trace element coating.

The invention relates to the technical field of waste catalyst recovery, and particularly discloses a method for recovering valuable metals from a waste catalyst containing vanadium and molybdenum. Comprising the following steps: S1, heating and roasting the waste catalyst containing vanadium and molybdenum, continuously heating and roasting, and cooling to obtain a roasted material; s2, mixing the roasted material with a sulfuric acid solution A containing oxalic acid, and heating and leaching to obtain a leaching solution A and a residue A; mixing the residue A with a sulfuric acid solution B containing thiourea and ethylenediaminetetraacetic acid, heating, carrying out secondary leaching to obtain a leaching solution B and a residue B, and washing the residue B with an acid solution to obtain a washing solution; combining the leaching solution and the washing solution to obtain a combined solution; s3, adjusting the pH value of the mixed solution to 2.5-3, then adjusting the pH value to 4.5-5, adding a dimethylglyoxime alcohol solution, and heating to obtain a purified solution; uniformly mixing the purified liquid with the extraction liquid to obtain an organic phase containing vanadium and molybdenum; and S4, reverse extraction and product preparation. The ammonium molybdate and the vanadium pentoxide obtained in the invention have high purity, and the recovery rate of vanadium and molybdenum is high.

The present invention relates to the field of adhesives, and specifically discloses a bio-based two-component polyurethane adhesive, including: component A and component B, the mass ratio of component A to component B is 0.8-1.2:0.8-1.2; the raw materials of component A include by mass: 3-5 parts of castor oil, 3-5 parts of epoxy soybean oil polyol, 10-15 parts of isocyanate, and 1-2 parts of carboxyl-terminated polyamide-amine; the raw materials of component B include by mass: 1-2 parts of tannic acid, 2-4 parts of lignin, 1-2 parts of dimethylglyoxime, 5-8 parts of ricinoleyl alcohol, 3-5 parts of isocyanate, 1-2 parts of epoxy soybean oil, 1-2 parts of fly ash, and 1-2 parts of nano titanium dioxide. The present invention also discloses a method for preparing the above-mentioned bio-based two-component polyurethane adhesive. Renewable castor oil and epoxy soybean oil polyol are compounded, and synergistically act with bio-based materials tannic acid and lignin to effectively implement the concept of environmental protection.

The invention provides sunlight-driven rapid self-repairing high-toughness polyurethane as well as a preparation method and application thereof, and relates to the technical field of ecological polymer materials. According to the sunlight-driven rapid self-repairing high-toughness polyurethane provided by the invention, diisocyanate, a chain extender, an organic solvent, a catalyst, dimethylglyoxime and heterojunction nanocrystals are taken as preparation raw materials, wherein the heterojunction nanocrystals comprise one or more of TiO2-CuS, CuO-CuS, TiO2-CuO and ZnS-CuS. Specific heterojunction nanocrystals are selected, the light absorption range of self-repairing polyurethane is widened, the light absorption efficiency is enhanced, excellent antibacterial performance is given, and efficient self-repairing of damage under driving of natural light such as sunlight is achieved in combination with a specific dynamic structure of self-repairing polyurethane. Meanwhile, the heterojunction nanocrystals and oxime bonds generate a coordination effect, so that the polyurethane material has the mechanical properties of high strength, high toughness and the like.

The invention relates to the technical field of polyurethane, in particular to bio-based waterborne polyurethane and a preparation method thereof. The preparation method comprises the following steps: firstly, preparing dialdehyde cellulose by utilizing cellulose oxidation, then reacting the dialdehyde cellulose with hydroxylamine hydrochloride to prepare oximido modified cellulose, and finally introducing the oximido modified cellulose and dimethylglyoxime into a polyurethane system. Through the synergistic effect of the oximido modified cellulose and dimethylglyoxime, the bio-based waterborne polyurethane film has excellent self-repairing efficiency while keeping high tensile strength and elongation at break. The bio-based waterborne polyurethane is suitable for the fields of flexible electronic devices, coatings, biomedical materials and the like, and has wide application prospects and remarkable economic and social benefits.

The invention discloses a high-flexibility bio-based polyurethane fluorescent material capable of being self-repaired at room temperature and a preparation method of the high-flexibility bio-based polyurethane fluorescent material, and belongs to the technical field of polyurethane materials. The preparation method comprises the following steps: generating a prepolymer from diisocyanate and polypropylene carbonate glycol under the action of a catalyst; carrying out chain extension reaction by taking dimethylglyoxime as a chain extender to generate a polyurethane material PUDMG containing ketoxime bonds; after PUDMG is dissolved, the PUDMG and a mixture of terbium nitrate hexahydrate and europium nitrate hexahydrate are subjected to a coordination reaction, and finally a target product is prepared. By introducing a dimethylglyoxime chain extender, a dynamic ketoxime bond is constructed in a polymer network, and the room-temperature efficient self-repairing of the material is realized; meanwhile, dimethylglyoxime provides effective coordination sites for Tb < 3 + > and Eu < 3 + >, and the dimethylglyoxime, the Tb < 3 + > and the Eu < 3 + > have a synergistic effect, so that the material is endowed with strong fluorescence performance, and meanwhile, the mechanical property and the self-repairing efficiency are further enhanced. The material is simple in preparation method and has a wide application prospect in the fields of flexible electronic devices and anti-counterfeiting.

This application relates to the technical field of waste catalyst recovery, and specifically discloses a method for recovering valuable metals from vanadium-molybdenum-containing waste catalysts. The method includes the following steps: S1: Heating the vanadium-molybdenum-containing waste catalyst for roasting, continuously heating for roasting, and then cooling to obtain a roasted material; S2: Mixing the roasted material with sulfuric acid solution A containing oxalic acid, heating for leaching to obtain leaching solution A and residue A; Mixing residue A with sulfuric acid solution B containing thiourea and ethylenediaminetetraacetic acid, heating for secondary leaching to obtain leaching solution B and residue B, washing residue B with acid solution to obtain a washing solution; Combining the leaching solutions and the washing solution to obtain a combined solution; S3: Adjusting the pH of the combined solution to 2.5 - 3, then adjusting the pH to 4.5 - 5, adding dimethylglyoxime alcohol solution, heating to obtain a purified solution; Mixing the purified solution with an extraction solution evenly to obtain a vanadium-molybdenum-containing organic phase; S4: Back-extraction and product preparation. The ammonium molybdate and vanadium pentoxide obtained in this application have high purity, and the recovery rates of vanadium and molybdenum are relatively high.

The invention provides a preparation method of a low-load RuPdPt ternary noble metal electrocatalyst. The preparation method comprises the following steps: etching foamed nickel in a hydrochloric acid solution, and soaking the etched foamed nickel in a mixed solution containing ferric chloride, copper chloride and sodium chloride for 3-12 hours to obtain a NixFeyCuzOOH substrate; ruthenium salt, platinum salt and palladium salt are mixed and then ground, water is added to prepare a mixed solution, then an alcoholic solution of dimethylglyoxime disodium salt octahydrate is added, and a precious metal mixed solution is formed after ultrasonic dispersion; the preparation method comprises the following steps: soaking a NixFeyCuzOOH substrate in a noble metal mixed solution, soaking for 1-6 hours under stirring and heating conditions, washing an obtained product with water, and drying to obtain the RuPdPt-NixFeyCuzOOH composite catalyst. According to the invention, the noble metals Ru, Pd and Pt are combined with the substrate NixFeyCuzOOH nanosheets through M1-M2-O bonds, so that monatomic-cluster sites of the noble metals Ru, Pd and Pt are effectively anchored, and the stability of the catalyst at high current density is greatly improved.

The invention discloses a nickel-cobalt hydrometallurgy circulation process, and relates to the technical field of hydrometallurgy. On one hand, magnesium sulfate solution wastewater is converted into magnesium salt liquid to replace sodium hydroxide to be saponified with an organic phase, and meanwhile water for a production line can be saved. Carbon dioxide waste gas is recycled, and industrial waste gas resource conversion and reuse are achieved. On the other hand, high-efficiency recovery of cobalt and nickel in the waste liquid is realized by preparing a functional material: a resin filtering membrane with a coordination trap on the surface is formed by virtue of Zn < 2 + > coordination activation, and cobalt and nickel ions in the waste liquid are efficiently captured; the preparation method comprises the following steps: pre-synthesizing a dimethyl glyoxime functional ligand with carboxyl by taking dimethylglyoxime and bromoacetic acid as raw materials, and directly constructing MOF (Metal Organic Framework) with a dimethyl glyoxime group for chelating Ni < 2 + >; the prepared adsorption particles are subjected to secondary adsorption in waste liquid after passing through resin, so that cobalt and nickel ions in the waste liquid reach an extremely high recovery rate. The hydrometallurgy can achieve the effect of neither recovery nor circulation.

The invention belongs to the field of novel functional polymer materials, and discloses a preparation method of a selenium-containing polymer material capable of fixing metal ions, and the preparation method comprises the following steps: S1, adding PTMEG into a round-bottom reaction flask filled with inert gas, and placing the round-bottom reaction flask in an oil bath pan for melting; s2, MDI, dimethylglyoxime, DSe and anhydrous N, N-dimethylacetamide are sequentially added and fully mixed; s3, stannous octoate and CuCl2 are added at the same time; s4, keeping the temperature of the oil bath pan and continuously reacting; s5, after the reaction is finished, a polymer is precipitated out, and secondary cleaning is conducted through methyl alcohol. The preparation method has the advantages that oximido is introduced into a polyurethane molecular structure to fix metal ions, meanwhile, selenium is introduced in a covalent fixation mode, and through double-site introduction of the metal ions and the selenium, the molecular structure of the polyurethane is greatly improved; the NO catalytic release rate of the material can be regulated and controlled, so that the biocompatibility and applicability of the polymer material in a blood environment are improved, and the application scene is further widened.

The application discloses an improved iodine oxidation-dimethylglyoxime spectrophotometry for detecting the content of nickel in steel, which comprises the following steps: obtaining an acidolysis solution by acidolysis of the steel to be detected; then diluting the solution to obtain a mother liquor to be detected; mixing the mother liquor to be detected with an ammonium citrate solution, water, an iodine solution, ammonia water and a dimethylglyoxime solution to obtain a chromogenic solution to be detected; and placing the chromogenic solution to be detected below a critical temperature to perform spectrophotometry to obtain the content of nickel in the steel to be detected. The application controls the adding amount of the ammonium citrate and the dimethylglyoxime in the chromogenic solution to be detected and the chromogenic temperature, so that the stable time of the absorbance of the chromogenic solution to be detected is greater than or equal to 60 minutes, the detection of the content of copper in the steel to be detected is less than or equal to 0.2%, and the probability of the result of the detection of the content of nickel in the steel to be detected (0.10%-50%) exceeding the allowable error of a navigation mark is less than or equal to 5%.

This disclosure describes compositions including dimethylglyoxime (DMG) and methods of using those compositions including, for example, to reduce the availability of nickel in the subject. In some aspects, the composition may be administered to a subject suffering from or susceptible to a bacterial infection and / or to a subject suffering from or susceptible to a amyloid-β peptide aggregation. In some aspects, this disclosure describes using DMG or a composition including DMG to disrupt a biofilm or reduce the likelihood of biofilm formation.

The invention discloses a preparation method and application of a high-elongation-at-break flexible self-healing heat-conducting composite material for a robot. The composite material is prepared by taking polycaprolactone diol, isocyanate, dimethylglyoxime and spherical aluminum oxide as raw materials, constructing a polyurethane matrix with a'dynamic-permanent 'double-crosslinking network structure and regulating and controlling the content of the spherical aluminum oxide. Wherein the permanent cross-linked network provides a rigid framework and high-strength support; a dynamic cross-linked network (composed of hydrogen bonds and dynamic oxime-urethane bonds) endows the material with energy dissipation capability and self-repairing characteristics. The spherical aluminum oxide filler has double functions in the system: the spherical aluminum oxide filler is used as a rigid reinforcing phase to improve the mechanical property; the heat conductivity coefficient is obviously improved as a high-efficiency heat-conducting channel. The composite material has high tensile strength, ultrahigh elongation at break and excellent bendability, and can self-repair damage for multiple times. The method is simple in preparation process and low in cost, and has wide application prospects in the fields of heat dissipation of flexible wearable electronic equipment and the like.

The application belongs to the technical field of metal-based catalysts, and discloses a metal Rh-based catalyst, a supported catalyst thereof, a preparation method and application. The metal Rh-based catalyst is formed by coordination of a metal Rh central atom with a butanedione oxime ligand and a triphenylphosphine and substituted derivative ligand, and has a structure shown in formula (1). The supported metal Rh-based catalyst is formed by loading the metal Rh-based catalyst on a porous carrier. The metal Rh-based catalyst and the supported catalyst thereof prepared by the application can realize efficient hydroformylation of isooctene to form iso-nonyl aldehyde, and show high isooctene conversion rate and iso-nonyl aldehyde selectivity.

The invention relates to the technical field of sodium ion battery electrode materials, in particular to a bismuth-nickel bimetallic selenide-containing composite material and a preparation method and application thereof. The preparation method comprises the following steps: carrying out hydrothermal reaction on a rod-like copper butoxide-nickel precursor which is unstable in structure under high-temperature pyrolysis and is used as a nickel source and a bismuth source, and then selenizing with selenium in an inert atmosphere in a vapor deposition manner; and cooling to room temperature to obtain the bismuth-nickel bimetallic selenide composite material of the two-dimensional nano-plate loaded nano-particles. According to the method, low thermal stability of nickel dimethylglyoxime is fully utilized, and conversion of rod-porous-small nano-particles is achieved in the pyrolysis-selenylation process. The morphology transformation is beneficial to finally and uniformly coating the surface of the bismuth selenide nano-plate. The raw materials used in the method are cheap and rich in source, the preparation period is short, and the stability is good. Meanwhile, the complementarity of the working potentials of the two components in the sodium storage process can also realize efficient sodium storage in the whole voltage range.

The invention belongs to the technical field of water electrolysis hydrogen production catalysts, and relates to a preparation method of a high-crystallinity self-supporting nickel sulfide nanosheet, which comprises the following steps: 1, dissolving dimethylglyoxime in absolute ethyl alcohol to form a solution A, and dissolving nickel nitrate hexahydrate in deionized water to form a solution B; 2, mixing and stirring the solution A and the solution B to generate nickel dimethylglyoxime precipitate; 3, centrifugally separating the nickel dimethylglyoxime precipitate, and alternately washing with deionized water and ethanol; 4, the purified nickel dimethylglyoxime is dispersed in a mixed solvent composed of deionized water and ethyl alcohol, and a dispersion system is obtained; 5, adding sodium sulfide into the dispersion system, uniformly mixing, and reacting at a constant temperature; 6, after the constant-temperature reaction is finished, naturally cooling to room temperature, centrifugally separating a solid product, washing with deionized water and ethanol, and carrying out vacuum drying to obtain the nickel sulfide electrocatalyst; the method is simple and easy to operate, and an effective scheme is provided for solving the problem of high cost of a traditional noble metal catalyst in the field of water electrolysis hydrogen production.

The invention relates to the technical field of palladium recovery, in particular to a method for recovering palladium from a silver anode mud pickling solution. According to the technical scheme, the method comprises the following steps: palladium precipitation pretreatment: providing a silver anode mud nitric acid washing solution, heating to 50-90 DEG C, carrying out water-based palladium precipitation, directly adding solid dimethylglyoxime or a water-based suspension of dimethylglyoxime into the heated washing solution in a stirring state, and reacting to generate dimethylglyoxime palladium precipitation; wherein the adding amount of the dimethylglyoxime is 1.0-2.5 times of the amount of the precipitated palladium, calcining to remove impurities, and separating the palladium dimethylglyoxime precipitate. The cost of an ethanol solvent and a special explosion-proof facility is saved, the safety investment is reduced, formic acid is used as a common chemical raw material, is easy to obtain and low in cost, reduces the production cost and the supply chain risk, is suitable for treating raw materials with different concentrations, is easy to popularize and implement on the existing hydrometallurgical equipment, and has a wide application prospect. The invention provides a novel palladium recovery technical route which is safer, more environment-friendly, higher in product purity and easier for industrial application.

The invention discloses a method for analyzing and testing the content of palladium in palladium-loaded diatomite, and belongs to the technical field of chemical analysis of noble metal materials. The analysis and test method comprises the following steps: melting a palladium-loaded diatomite sample in an alkaline flux, leaching, carrying out acid inversion, completely dissolving the sample, adding a dimethylglyoxime solution to generate a precipitate, filtering, weighing, and calculating the content of the palladium element. In addition, the problem that a quantitative analysis technology for the palladium element in the palladium-loaded diatomite sample is lacked is solved, and the test method is accurate, rapid, scientific and reliable.

The invention belongs to the technical field of preparation of dimethylglyoxime, and provides a method for preparing dimethylglyoxime through multistage oximation. The method comprises the following steps: continuously introducing 2, 3-butanedione into a first reactor; continuously introducing a hydroxylamine salt aqueous solution and ammonia water into the second reactor; the method comprises the following steps: carrying out first reaction on 2, 3-butanedione, a hydroxylamine salt aqueous solution and ammonia water in a first reactor to obtain a ketoxime mixture; performing a second reaction on the ketoxime mixture, a hydroxylamine salt aqueous solution and ammonia water in a second reactor, and separating to obtain dimethylglyoxime and a mother solution containing hydroxylamine salt; the mother liquor containing the hydroxylamine salt is reused in the first reactor. According to the method, the utilization rate of the 2, 3-butanedione and the hydroxylamine salt is remarkably improved, the residual quantity of the hydroxylamine salt and the butanedione oxime is reduced, and the yield, the selectivity and the purity of the butanedione oxime are remarkably improved. Meanwhile, the method disclosed by the invention is simple in process flow, simple and convenient to operate, capable of realizing continuous production and beneficial to industrial production of dimethylglyoxime, and has a relatively great application prospect.

The present invention relates to a method for efficiently purifying platinum from a ferroalloy noble metal-enriched slag solution in a short process, and belongs to the technical field of noble metal refining and purification. After the ferroalloy noble metal-enriched slag solution is diluted, an ammonium salt and a reducing agent are added to perform reduction and impurity removal, thereby obtaining a crude ammonium chloroplatinite solution and an insoluble slag; sulfite and ammonium salt are added to the crude ammonium chloroplatinite solution to precipitate platinum in the form of hydroxytrisulfite and ammonium platinate; the hydroxytrisulfite and ammonium platinate slag is dissolved by acid solution, and then precipitated and impurities are removed by diacetyl oxime to obtain a pure ammonium chloroplatinite solution; an oxidant and an ammonium salt are added to the pure ammonium chloroplatinite solution under acidic conditions to perform an oxidation reaction to obtain ammonium chloroplatinate; the ammonium chloroplatinate is slurried with pure water, reduced by a reducing agent, and roasted to obtain refined platinum. The present invention utilizes the difference in solubility properties of platinum ammonium sulfite salts of platinum and rhodium in acid, and controls suitable conditions so that platinum and rhodium can be effectively separated under a reduction system; the present invention can produce refined platinum with a purity of more than 99.99%, and a direct yield of platinum is greater than 98%.

This invention discloses a nickel-cobalt hydrometallurgical recycling process, belonging to the field of hydrometallurgical technology. On one hand, this invention converts magnesium sulfate solution wastewater into magnesium salt solution, replacing sodium hydroxide in saponification with the organic phase, while also saving water in the production line. It also recycles carbon dioxide waste gas, achieving resource conversion and reuse of industrial waste gas. On the other hand, it prepares functional materials to achieve efficient recovery of cobalt and nickel from waste liquid: utilizing Zn... 2+ Coordination activation forms a resin filter membrane with a coordination trap on its surface, which efficiently captures cobalt and nickel ions in waste liquid; a carboxyl-functionalized dimethylglyoxime ligand is pre-synthesized using dimethylglyoxime and bromoacetic acid, and a MOF with a dimethylglyoxime group is directly constructed for chelating Ni. 2+ The prepared adsorption particles undergo secondary adsorption in the waste liquid after passing through the resin, resulting in an extremely high recovery rate of cobalt and nickel ions in the waste liquid. This hydrometallurgical process achieves both recovery and recycling.

The application discloses a kind of reworkable and self-repairing polyurethane solid-solid phase change material and preparation method thereof, comprising: under argon or nitrogen atmosphere, polyethylene glycol is added to reactor for water removal treatment, under certain temperature and stirring speed, diisocyanate is dissolved in solvent and then added to reactor, catalyst is added, and pre-polymer is obtained by reaction;Temperature is adjusted, butanedione oxime and metal compound are dissolved in solvent respectively and then added to reactor, continue to react, pentaerythritol is dissolved in solvent and then added to reactor, and polyurethane solution is obtained by stirring;Polyurethane solution is poured into polytetrafluoroethylene mold, dried in oven, and reworkable and self-repairing polyurethane solid-solid phase change material is obtained.The oxime-urethane bond, metal coordination bond and hydrogen bond are introduced into the polyurethane solid-solid phase change material, and the obtained polyurethane solid-solid phase change material not only has good phase change performance and mechanical properties, but also has reworkability and self-repairing performance.

The invention discloses a method for preparing a catalyst by recycling metal in a waste ternary lithium battery, which comprises the following steps: after obtaining positive electrode powder, adding the positive electrode powder into a deep eutectic solvent, and leaching to obtain a leaching solution; adding a dimethylglyoxime solution into the leachate to remove nickel, calculating according to the measured element concentrations of Co and Mn, supplementing Co salt or Mn salt, or adding potassium salt or sodium salt into the mixed solution, uniformly stirring, adding an oxalic acid solution into the mixed solution, filtering, washing, and drying to obtain the nickel-cobalt-cobalt-cobalt-cobalt-cobalt-cobalt-cobalt-cobalt-cobalt-cobalt-cobalt-cobalt-cobalt-cobalt-cobalt-cobalt-cobalt-cobalt-cobalt-cobalt-cobalt-cobalt- and carrying out centrifugal separation, washing, drying and calcining on the obtained precipitate to obtain the CoMn2O4 spinel material or the potassium-doped CoMn2O4 spinel material or the sodium-doped CoMn2O4 spinel material. And the hydrotalcite-like compound can be directly prepared from the leachate. The leachate obtained by leaching the positive electrode material through the deep-eutectic solvent system can be directly used for synthesis of spinel type or hydrotalcite-like materials without complex post-treatment.

This application belongs to the technical field of polyurethane compositions, specifically providing a self-healing polyurethane composition and its preparation method. The composition is obtained by mixing the following raw materials in parts by weight: 50-60 parts polycaprolactone diol, 15-20 parts isocyanate, 0.5-2 parts leveling agent, 1-2 parts light stabilizer, 20-30 parts composite solvent, 2-5 parts aliphatic-copper complex crystals, 5-8 parts dimethylglyoxime, and 0.01-0.05 parts catalyst. The aliphatic-copper complex crystals are obtained by crystallization of a mixture of hydrogenated castor oil and a copper complex. The self-healing polyurethane composition coating obtained by this application has the advantages of stain resistance, crack resistance, and resistance to folding and matte finish.

The invention provides a cobalt and nickel ion detection method which comprises the following steps: adding a buffer solution and dimethylglyoxime into a water sample for reaction, and adding lead ions and copper ions to obtain a water sample to be detected; the method comprises the following steps: putting a water sample to be detected into a stirring container, inserting a screen-printed electrode into the stirring container, adjusting parameters, and detecting cobalt and nickel ions in the water sample to be detected; wherein the adding sequence of the buffer solution and the dimethylglyoxime is not limited. According to the detection method disclosed by the invention, the regulation and control effect of an ammonia water buffer solution and the high selectivity of dimethylglyoxime are fully utilized, a screen-printed electrode is introduced, and a solution containing lead and copper ions is adopted for coating, so that an ingenious separation means and a masking mechanism are obtained, and effective distinguishing and accurate determination of cobalt and nickel ions are realized.

The self-repairing PU sequentially comprises a coating layer, a PU surface layer, a PU foaming layer and a base cloth layer from top to bottom, a polyurethane prepolymer, a catalyst and dimethylglyoxime (a metal chelating agent) are packaged in a PU foaming layer through a microsphere packaging technology, when the material is damaged, microspheres are broken to release repairing components, a cross-linking reaction between the prepolymer and active substances (such as water and polyhydric alcohols) is triggered under the illumination or heating condition, scratches or holes are rapidly filled, and the service life of the material is prolonged. Manual intervention is not needed in the repairing process, and only external conditions (such as light / heat) are needed.

The present invention is a method for preparing allyl sulfone compounds by visible light synergistic cobalt catalysis, comprising adding cyclobutanone oxime ester, α-methylstyrene, 1,4-diazabicyclo[2.2.2]octane-1,4-diamine-1,4-disulfinic acid (DABSO), inorganic base, dibutyl diketoximine pyridine cobalt chloride (Co(dmgH)2PyCl) to dimethyl sulfoxide (DMSO) solvent to obtain a mixed solution, and irradiating the mixed solution with 450 nanometer LED light at room temperature and in an inert gas atmosphere. The present invention does not require the use of sulfonyl reagents and photocatalysts, only uses cheap metals as catalysts, and can achieve gram-level reactions by visible light irradiation at room temperature, with the advantages of high efficiency, conservation and environmental protection. Moreover, the reaction conditions of the present invention are mild, the raw materials are simple and easy to obtain, and it is safe and easy to operate in industrial production, and has great potential for large-scale application value.

The invention belongs to the technical field of precious metal preparation, and particularly relates to dinitro di (dimethylglyoxime) iridic acid as well as a preparation method and application thereof. The preparation method comprises the following steps: adding sodium carbonate into an iridium source solution, and adjusting the pH value of the solution to 6-7; heating the solution to 60-90 DEG C, reacting for 2-6 hours, heating to 90-120 DEG C, slowly dropwise adding a sodium nitrite aqueous solution into the solution, and reacting for 4-8 hours; and heating the obtained hexanitroso sodium iridate solution to boiling, adding dimethylglyoxime and a stabilizer into the solution, reacting for 10-20 hours to obtain a dinitro di (dimethylglyoxime) iridic acid solution, and acidizing and freeze-drying to obtain the yellow crystal. The dinitro-bis (dimethylglyoxime) iridic acid prepared by the method is single in crystal form, the prepared gasoline car three-way catalyst can improve the low-temperature light-off activity of NOx, and the gasoline car three-way catalyst has high catalytic property, high stability and better durability.

The invention discloses a method for recycling valuable metals Li, Ni, Co and Mn in a waste ternary lithium ion battery positive electrode material, which comprises the following steps: (1) obtaining the waste ternary lithium ion battery positive electrode material, roasting, then adding methanesulfonic acid and ascorbic acid for mixing reaction, and filtering; (2) adding dimethylglyoxime into the leachate to complex and precipitate Ni < 2 + >, and filtering to obtain filtrate 1 and filter residues; (3) adjusting the pH value of the filtrate 1, precipitating Co < 2 + > by adopting ammonium sulfide, and filtering to obtain filtrate 2 and filter residues; (4) adjusting the pH value of the filtrate 2, precipitating Mn < 2 + >, and filtering to obtain filtrate 3 and filter residues; and (5) adding phosphate into the filtrate 3 to precipitate Li < + >, and filtering to obtain filtrate 4 and filter residues. According to the method, a good leaching effect is achieved under the conditions that the acid concentration is low, the temperature is low, and the leaching reaction time is short, and the follow-up steps for separating and recycling the metal in the leaching liquid are short. The method is high in recovery efficiency, short in period, simple in process and suitable for industrial application production.

The invention relates to a method for recovering valuable metals from aluminum-containing waste ternary battery positive electrode powder by using hazelnut shell powder. The method comprises the following steps: by using widely existing waste hazelnut shell powder as a reducing raw material, pyrolyzing at high temperature to generate various reducing gases (CH4, CO, H2 and the like) and reducing coke, and reducing the aluminum-containing ternary positive electrode material; and then leaching out Li through water leaching, and precipitating to obtain Li2CO3. Carrying out acid leaching on the water leaching residues, and transferring Al, Co, Ni and Mn elements to a liquid phase; kMnO4 is added into the acid liquor, and MnO2 is precipitated; then adding dimethylglyoxime (DMG) to obtain a nickel dimethylglyoxime precipitate; and adjusting the pH value of the cobalt-aluminum solution to 6-10, precipitating aluminum impurities, and evaporating, concentrating and crystallizing the cobalt-containing solution to obtain a CoSO4. 7H2O product. The waste hazelnut shell powder is used for reducing raw materials, wastes are used for treating wastes, the cost of the recycling process is effectively reduced, meanwhile, combination of aluminum and lithium is inhibited, the lithium recycling efficiency is improved, the cost of the recycling process can be effectively reduced, and good economic benefits and application prospects are achieved.