775 results about "Oxidizing agent" patented technology

Disclosed are an integrated device for multiphase extraction and tail gas and wastewater treatment and a control method therefor. The integrated device comprises at least one set of small multiphase extraction units connected to an extraction well, a reagent tank storing a solubilizing agent and an oxidizing agent, a resin adsorption tower, an oil-water separator, a photocatalytic reactor, an oil storage tank, a heating system for heating the reagent tank and the oil-water separator and providing high-temperature steam for the resin adsorption tower, and a controller, wherein the reagent tank is separately connected to the extraction well and the photocatalytic reactor. Each multiphase extraction unit comprises a gas-liquid separator, a water ring vacuum pump, and a jet pump, wherein an extracted gas-liquid mixture undergoes gas-liquid separation by means of the gas-liquid separator, a waste gas is conveyed to the resin adsorption tower by means of the water ring vacuum pump, waste liquid and an extracted oil-water mixture are respectively conveyed to the oil-water separator by means of the jet pump, wastewater is conveyed to the photocatalytic reactor, and waste oil is conveyed to the oil storage tank. The present invention effectively ensures the stability and high efficiency of removal while realizing miniaturization.

The application discloses a method and a reaction device for synchronously and efficiently removing iron and organic matters, and belongs to the technical field of hydrometallurgy. The method comprises the following steps: taking a leaching solution of a zinc hydrometallurgy purification process, adjusting the pH by using a neutralizing agent a, maintaining the pH between 3.6-4.0, then conveying the solution to a leaching solution storage tank for preheating and stirring, after reaching a set temperature of 50-95 DEG C, injecting the solution into an iron removal reactor, adjusting the pH to be 4.0-5.0, introducing an oxidizing agent, controlling the flow rate to be 10-300 L / h, deeply removing the organic matters and iron ions in the solution, and after the reaction is finished, aging for 1-4 h, and then performing solid-liquid separation. The reaction device comprises a leaching solution storage tank, an iron removal reactor, an oxidizing agent supply system and the like. The application can efficiently and synchronously remove the iron ions and the organic matters in the solution, can greatly reduce the iron removal time, can reduce the catalyst and oxidizing agent consumption, has a good removal effect, and has a good application prospect.

The application relates to the technical field of magnetic materials, in particular to a preparation method of high-performance heavy-rare-earth-free neodymium iron boron magnets; the preparation method comprises the following steps: rapidly quenching a main phase alloy into a flake, obtaining coarse powder after hydrogen breaking; immersing the coarse powder in an ethanol mixed solution containing lanthanum nitrate and cerium nitrate, drying the pretreated coarse powder after ultrasonic-magnetic stirring cooperative treatment; adding an antioxidant and a lubricant into the pretreated coarse powder, preparing fine powder with an average particle size of 2-3.5 microns through airflow milling; performing magnetic field orientation compression molding on the fine powder under nitrogen protection, improving the density through cold isostatic pressing; finally, performing vacuum sintering and step-by-step tempering treatment to obtain the high-performance heavy-rare-earth-free neodymium iron boron magnets; wherein the main phase alloy is composed of the following components with mass percentage: 28-31wt.% Pr25Nd75, 0.88-1.2wt.% B, 0-0.1wt.% Al, 0.05-0.3wt.% Ti, 0.05-0.4wt.% Cu, 0.5-1.4wt.% Co, 0.1-0.4wt.% Ga, and the balance is Fe; the prepared neodymium iron boron magnet has the dual characteristics of high coercivity and high remanence, and effectively guarantees the performance and quality.

A method of producing hydrocarbons from an organic material. The method includes: dissolving a solid including an organic material in a solvent to form a carbon liquid feed; introducing the carbon liquid feed into a liquid inlet of a feed assembly of a reactor system; mixing the carbon liquid feed and an oxidant gas feed in the feed assembly; combusting, in the feed assembly, at least a portion of the carbon liquid feed to produce an at least partially combusted gas mixture and heat; introducing the carbon liquid feed and the at least partially combusted gas mixture to a reactor vessel in fluid connection with the feed assembly; and in the reactor vessel, converting, using the heat, the organic material in the carbon liquid feed into a high value chemical.

The application discloses a kind of sulphur-containing polydopamine melanin nanoparticles and preparation method and application, preparation raw materials include polyhydroxy compound and sulphur-containing compound, the weight ratio of the polyhydroxy compound and the sulphur-containing compound is (1-100) :(1-100), the preparation raw materials also include water, organic solvent and acid-base regulator.The application occurs self-polymerization reaction under alkaline condition with dopamine and sulphur-containing compound, without additional crosslinking agent and oxidant, and the nanoparticles obtained have excellent photothermal performance.In photothermal therapy, biomedical imaging, water purification, functional coating and other aspects, it shows great application potential.And preparation reaction condition is mild, without additional catalyst and oxidant, process is safe, post-processing is simple, and no harmful waste water and waste residue to environment, meet the requirements of green chemistry.

This invention belongs to the field of metallurgical solid waste resource utilization technology, specifically involving a method for recovering rare and precious metals from smelting acid sludge. It includes: (1) oxidative leaching of smelting acid sludge using a sulfuric acid-hydrogen peroxide leaching system to obtain a selenium-containing solution and gypsum slag; (2) reduction of the selenium-containing solution using a reducing agent to obtain crude selenium; (3) pre-sulfurization of the gypsum slag obtained in step (1), followed by solid-liquid separation to obtain sulfidated gypsum slag; and (4) enrichment of silver and other precious metals in the sulfidated gypsum slag obtained in step (3) using an agglomeration flotation method. The oxidative leaching process in this invention differs from the traditional sulfuric acid-nitric acid leaching system. It uses green and clean hydrogen peroxide as the oxidant, without introducing other interfering elements, avoiding the problem of re-dissolution during selenium reduction, thereby reducing the amount of reducing agent used. Furthermore, the leaching temperature is lower than that of the traditional oxidative leaching process, thus reducing energy consumption and cost.

The present application relates to the technical field of micro-nano functional materials, and particularly relates to a high-efficiency light-heat conversion and wear-resistant super-hydrophobic coating, a preparation method thereof and an application thereof in ice prevention and removal, the preparation method adopts ammonium persulfate as an oxidant to initiate polymerization of pyrrole on the surface of halloysite nanotubes to generate polypyrrole, so as to obtain a halloysite nanotube composite material wrapped by polypyrrole. The super-hydrophobic coating is obtained by mixing the composite material with low-surface-energy polydimethylsiloxane, and the coating layer formed by the super-hydrophobic coating has the characteristics of high roughness and low surface energy, and thus has excellent hydrophobic performance. The coating layer also has good light-heat effect, flexibility, elasticity, mechanical performance, high-temperature resistance and durability. In addition, by adding hydrophobic nano-SiO2, the super-hydrophobic performance of the coating layer is further improved, and the hardness and wear resistance of the coating layer are also enhanced. Finally, the coating layer has excellent light absorption capacity and light-heat conversion efficiency, and realizes the performance of efficient protection and ice layer removal in the application of ice prevention and removal.

The application discloses an intermediate processing liquid for an electroless nickel immersion gold (ENIG) production line and a chemical gold preparation method. The intermediate processing liquid is applied between the electroless nickel plating and immersion gold processes, and comprises (a) a pH buffer and a metal ion complexing agent: a total concentration of 50-150 g / L; (b) an adsorptive corrosion inhibitor: a concentration of 0.5-5.0 g / L; (c) a low-foam non-ionic surfactant: a concentration of 0.01-10 g / L; (d) an auxiliary antioxidant: a concentration of 0.5-30 g / L; (e) a dissolving agent: a concentration of 1-50 ml / L; (f) a pH regulator: an appropriate amount, which is added to maintain the pH value of the intermediate processing liquid at 4.0-6.5; and (g) deionized water: a balance, so that the concentrations of the above components reach the set target values; and the intermediate processing liquid has a design use temperature of 20-45 DEG C. The intermediate processing liquid removes residual nickel ions on the board surface and in micropores through strong complex cleaning, and blocks the pollution to the subsequent gold tank; meanwhile, the preferential adsorption of the corrosion inhibitor molecules at the nickel layer grain boundaries forms a controllable molecular-level protective film, effectively adjusts the immersion gold replacement reaction kinetics, and prevents the occurrence of intergranular corrosion (black plate).

The application relates to the technical field of organic synthesis, and discloses a preparation method of a hydrocarbyl carboxylic acid, which comprises the following steps: mixing a hydrocarbyl aldehyde, an oxidizing agent and a first metal salt to perform pre-reaction, and then mixing the reaction system obtained through the pre-reaction with a second metal salt to perform reaction; wherein the first metal salt is selected from at least one of a sodium salt, a potassium salt, a calcium salt, a lithium salt, an iron salt and a copper salt; and the second metal salt is selected from at least one of a zinc salt, a manganese salt, a cobalt salt, a palladium salt and a silver salt. The preparation method of the hydrocarbyl carboxylic acid can greatly shorten the reaction time, and improve the raw material conversion rate, the target product selectivity and the target product purity of the aldehyde oxidation acid reaction.

The application relates to the technical field of high polymer materials, and particularly discloses a high-toughness rubber glove material and a preparation method thereof, the high-toughness rubber glove material comprises the following raw materials: a base material, nano silicon dioxide, a multifunctional crosslinking agent, a peroxide initiator, a lubricant and an antioxidant; the base material is composed of alpha-olefin ethylene copolymer, ethylene propylene diene rubber and hydrogenated styrene-butadiene block copolymer in a mass ratio of 5-7:2-3:1-2. The hydrogenated styrene-butadiene block copolymer is introduced as a physical compatibilizer, macroscopic phase separation in a dynamic crosslinking process is effectively inhibited, and crystal point defects are eliminated; the multifunctional crosslinking agent is used for micro-crosslinking, so that the material can dissipate strain energy through molecular chain stretching when subjected to external force, the tensile strength, the elongation at break and the tear strength of the glove are significantly improved under the premise of keeping soft, and excellent barrier blocking performance is endowed.

This utility model discloses a device for efficiently removing COD from electroplating wastewater, relating to the field of electroplating wastewater treatment technology. It includes a base with a reaction tank fixedly connected to the top. The beneficial effects of this utility model are as follows: Oxidizing agents or coagulants from the storage tank can be input into the spray tank via a delivery pipe and a pump. While the stirring rollers rotate, the oxidizing agents or coagulants are continuously sprayed into the reaction tank through the spray tank, causing the wastewater to react uniformly. This destabilizes and coagulates the tiny suspended particles, colloids, and some dissolved organic matter in the wastewater into larger flocs. Through the coordinated operation of the air inlet pipe, jet nozzle, and air pump, the reaction tank is continuously injected with air. The air bubbles adsorb the coagulated flocs, and the upward force of the gas causes the flocs to float on the wastewater surface. Finally, a scraper removes the flocs into the storage tank.

The application relates to an ultrasonic treatment method of high-impurity copper anode slime. The ultrasonic treatment method is realized through hierarchical ultrasonic strengthening and synergistic leaching. In the first-stage leaching, hydrogen peroxide-oxygen-rich air composite oxidants are combined with ultrasonic cavitation effects to realize efficient oxidation leaching of arsenic, antimony and bismuth; in the second-stage leaching, sulfuric acid-sodium sulfite mixed leaching agents are used to remove harmful impurities such as arsenic, antimony and bismuth under ultrasonic strengthening, and to efficiently enrich valuable metals such as gold, silver, selenium and tellurium, so that the treatment period is shortened, energy consumption and reagent consumption are reduced, resource comprehensive utilization is improved, and the method is suitable for efficient separation and resource recovery of high-impurity copper anode slime containing refractory impurities such as arsenic, antimony and bismuth and valuable metals such as gold, silver, selenium and tellurium.

The present application relates to the technical field of graphite material, and provides a method for preparing high-expansion-volume expanded graphite by activation or pretreatment. In the method, natural flake graphite, potassium permanganate, concentrated sulfuric acid and an activating agent are mixed to perform an oxidation intercalation reaction, and then high-expansion-volume expanded graphite is obtained by high-temperature expansion. Alternatively, in the method, natural flake graphite is pretreated by a pretreatment agent, and then an oxidation intercalation reaction and high-temperature expansion are performed to obtain high-expansion-volume expanded graphite. By activation or pretreatment, the method can improve the expansion volume of expanded graphite. In particular, when the pretreatment method is used, the method can prepare expanded graphite with significantly increased expansion volume on the basis of reduced use of oxidizing agent and intercalating agent, and the expansion effect is more significant.

The purpose of the present invention is to provide a combustion-type ammonia decomposition device wherein NH3 and an oxidant are supplied to the combustion-type ammonia decomposition device, combustion heat generated by a combustor is utilized to the maximum extent as heat for decomposing NH3 into N2 and H2, and, furthermore, the decomposition gas is purified to efficiently produce H2. Provided is a combustion-type ammonia decomposition device (101) comprising a combustor (11) configured by a burner, a combustion furnace (12) in which the combustor (11) is disposed, a heating furnace (14) connected following the combustion furnace (12), and a catalyst vessel (15) connected following the heating furnace (14), wherein: in the combustion furnace (12), NH3 and an oxidant supplied to the combustor (11) are combusted, and a combustion gas containing steam and N2 generated in the combustion furnace (12) is supplied to the subsequent heating furnace (14); in the heating furnace (14), NH3 supplied separately to the heating furnace (14) is heated and decomposed by the combustion gas, and decomposition gas produced by decomposing the NH3 in the heating furnace (14) is supplied to the subsequent catalyst vessel (15); and in the catalyst vessel (15), residual NH3 contained in the decomposition gas is decomposed by using a catalyst (16).

Provided is a radiant heating device. The radiant heating device according to the present disclosure comprises: a combustion chamber body having a combustion chamber therein; a burner configured to preheat the combustion chamber by supplying fuel and an oxidizer and, after preheating, to supply only fuel into the combustion chamber; an oxidizer injection nozzle for supplying the oxidizer to the combustion chamber; and a gas discharge pipe for discharging exhaust gas circulated in the combustion chamber.

The present application belongs to the field of environmental functional materials and water treatment technology, and aims to provide a preparation method of ceramic membrane based on endogenous pore forming and catalysis of sludge containing algae. The method comprises the following steps: taking dewatered sludge of water supply plant in algae outbreak period of water source, drying, ball milling and sieving to obtain sludge powder; soaking and washing after using organic acid with complexing ability as heavy metal removal agent, pre-carbonization treatment, dry pressing into embryo, sintering into membrane sheet; primary activation treatment in weak oxidizing strong acid, washing and heating treatment for secondary activation to obtain ultrafiltration ceramic membrane product. The method is simple in operation steps, easy to implement and green and environmental protection; the prepared ceramic membrane has good separation performance and high mechanical strength, can catalyze oxidizing agent commonly used in water treatment while filtering, and free radicals are generated by decomposition to degrade organic matter; or catalyze common cleaning agent sodium hypochlorite during membrane cleaning to generate free radicals to strengthen the cleaning effect.

A method for determining the presence of chromium-6 (Cr-6) in a solid sample is described, comprising the steps of contacting the solid sample with a destruction liquid under conditions in which the Cr-6 of the solid sample dissolves in the destruction liquid as a chromate, providing a test solution; subjecting the test solution obtained in step (1) to a specific Cr-6 detection reaction, under conditions in which the presence of Cr-6 is detected; and detecting whether the specific Cr-6 reaction occurred in step (2); wherein the destruction liquid comprises an oxidant, which has a standard electrode potential E0 higher than the chromate.

The application discloses a kind of lignin-based aryl formate and diaryl ether compound and synthesis method thereof, belong to the technical field of organic compound synthesis.The method uses lignin β-O-4 model compound as reaction raw material, under the condition of oxidant and alkali, after heating reaction, then join diaryl iodonium under air atmosphere and stir, obtain aryl formate and diaryl ether compound.The synthesis method of the application has the advantages of simple operation, mild reaction condition and high product selectivity, provides a new way for the preparation of aryl formate and diaryl ether compound.

The application provides a method for separating rare earth and iron aluminum boron from neodymium iron boron calcined material leaching solution. The method provided by the application comprises the following steps: obtaining neodymium iron boron calcined material leaching solution containing rare earth, aluminum, iron and boron based on hydrochloric acid preferential dissolution method, adding an oxidizing agent after adjusting the pH of the leaching solution to 3-5, stirring and reacting, and separating to obtain an iron-containing precipitate and an iron-removed solution; using an organic extractant to extract boron from the iron-removed solution to obtain a boron-containing organic phase and a boron-removed solution; adjusting the pH of the boron-removed solution to 4-5, and then performing deep hydrolysis to remove aluminum, and filtering and separating to obtain an aluminum-containing precipitate and a purified rare earth solution for extracting and separating rare earth; using deionized water or an alkaline solution to back-extract boron from the boron-containing organic phase, recycling the organic phase, and concentrating the back-extraction solution to obtain a boron-containing crystalline product. The method provided by the application can recover boron in the neodymium iron boron calcined material leaching solution, is conducive to the removal of aluminum by hydrolysis and reduces the loss of rare earth, and greatly reduces the environmental pressure and the subsequent wastewater treatment pressure.

This invention relates to the field of concrete admixtures, specifically to an anti-mud polycarboxylate superplasticizer, its preparation method, and its application. The anti-mud polycarboxylate superplasticizer provided by this invention comprises, by weight, the following raw materials: 100-180 parts of unsaturated polyether monomer, 5-10 parts of unsaturated carboxylic acid monomer, 2-5 parts of air-entraining monomer, 5-10 parts of anti-mud monomer, 10-20 parts of oxidant, 0.4-0.6 parts of reducing agent, 5-7 parts of chain transfer agent, and 150-300 parts of water; the air-entraining monomer and the anti-mud monomer have specific structures. The simultaneous introduction of specific anti-mud monomers and air-entraining monomers into the anti-mud polycarboxylate superplasticizer of this invention not only reduces clay adsorption but also provides better dispersibility and anti-mud effect at lower dosages, increasing the overall workability of concrete and improving concrete performance.

This application relates to the field of organic synthesis technology, specifically disclosing a clean synthesis method for dithiodiethylene glycol. Using β-mercaptoethanol (2-mercaptoethanol) as a starting material, this application efficiently prepares dithiodiethylene glycol via oxidative coupling. This clean synthesis method uses hydrogen peroxide as a green oxidant, achieving highly selective oxidative coupling under mild conditions. It has advantages such as simple process, high safety, environmental friendliness, easy operation, and excellent product yield, making it suitable for large-scale industrial production.

The invention provides compositions useful in the etching of polysilicon in the presence of silicon oxide and silicon nitride. The compositions comprise choline hydroxide, an oxidizing agent such as periodic acid, and optionally a surfactant, and are useful in the etching of polysilicon in general, and in particular in both the operation of polysilicon trim as well as polysilicon exhume. The utilization of an added oxidizing agent was found to reduce selectivity of silicon etching based on the silicon crystal orientation, which was found to reduce roughness and the presence of residual silicon residues, such as silicon (111) residues after the etching step.

This invention provides a hierarchical porous lithium-ion sieve, its preparation method, and its application, belonging to the field of lithium extraction technology. The invention uses needle-like γ-MnOOH as a stabilizer and an aqueous polymerization reaction solution as the liquid phase for foaming. The foamed material is then subjected to ultraviolet light curing to obtain a porous material with γ-MnOOH as the framework. This porous material is further immersed in a lithium hydroxide solution containing an oxidant for a hydrothermal reaction. After the hydrothermal reaction, the product is calcined to obtain hierarchical porous LiMn2O4. Finally, the obtained hierarchical porous LiMn2O4 is impregnated and cured, thereby preparing a hierarchical porous lithium-ion sieve with excellent adsorption rate, adsorption capacity, and cycle stability. Furthermore, the preparation method provided by this invention is simple to operate and beneficial for practical production.

A multiply redundant safety system that protects humans and assets while transfer(s) / fuelling of on road / off road, rail, marine, aircraft, spacecraft, rockets, and all other vehicles / vessels utilizing Compressed and or Liquefied Gas Fuels / compound(s). Utilizing Natural Gas Chemical Family of Hydrogen / Propane / ethane / ammonia / and any mixtures along with or with out oxidizer(s), such as Liquefied Oxygen, Oxygen Triplet (O3) / ozone / hydrogen peroxide / peroxide / solid oxidizer(s) one or more processors, utilizing Artificial Intelligence techniques / machine learning in combination with one or more sensors; in combination with one or more micro switches / actuator(s) combine to detect any leaks / fire(s) / or explosion hazards / vehicle motion / arc's, spark(s) / and other hazards for quickly mitigating / locking out / stopping fueling / gas / transfers / vehicle releasing system(s).

This invention discloses an integrated treatment method for desulfurization, denitrification, and waste heat recovery of coke oven flue gas, belonging to the field of coke oven flue gas treatment technology. The method includes: 1) flue gas pretreatment and high-temperature waste heat recovery; 2) directional oxidation conversion of nitrogen oxides and removal of residual oxidants; 3) synergistic desulfurization and denitrification treatment with activated carbon / activated coke; 4) side reaction suppression and control; 5) low-temperature waste heat recovery and reheat utilization; and 6) activated carbon / activated coke regeneration and sulfur resource recovery. This invention converts NO in flue gas into high-valence NO₂ through a pre-oxidation reaction, improving the kinetics of the denitrification reaction, increasing denitrification efficiency, and reducing ammonia consumption. By controlling the SO₂ concentration and acid gas content at the desulfurization layer outlet, it effectively inhibits the deposition of ammonium salts such as (NH₄)₂SO₄ and NH₄Cl, reducing bed blockage. Through high and low temperature staged waste heat recovery, it achieves tiered utilization of heat, improving the overall thermal efficiency of the system. This achieves synergistic optimization of efficient pollutant removal and efficient energy utilization.

This invention discloses an in-situ iodine-generating water purification material, a water purification method, and a method for regenerating the water purification material, solving the technical problems of poor storage stability of elemental iodine, uncontrollable addition, and potential secondary pollution in existing technologies. The in-situ iodine-generating water purification material includes a catalyst and an oxidant, which undergo a catalytic oxidation reaction in organic wastewater to generate elemental iodine; wherein the catalyst includes a metal oxyiodide generated by a solvothermal reaction of a soluble bismuth salt and a soluble alkali metal iodide. The water purification method includes the steps of adding the catalyst and oxidant from the aforementioned in-situ iodine-generating water purification material to the organic wastewater. The method for regenerating the aforementioned in-situ iodine-generating water purification material includes the steps of adding the deactivated water purification material to an iodide solution, reacting for a period of time, and then collecting the solid to obtain the regenerated catalyst.

This application provides a method for preparing nano-sized orthogonal iron phosphate and a method for preparing lithium iron phosphate cathode materials, relating to the field of electrode materials. The method for preparing nano-sized orthogonal iron phosphate includes: mixing a first ferrous salt solution with a first phosphorus source solution and an oxidant to perform a co-precipitation reaction to obtain amorphous iron phosphate; mixing the amorphous iron phosphate with water to form a slurry, controlling the slurry particle size, and then adding a crystal transformation aid to the slurry, followed by aging under stirring conditions at a pH of 0.8–1.5 to obtain nano-sized orthogonal iron phosphate; wherein the crystal transformation aid includes a second ferrous salt and a second phosphorus source. The iron phosphate prepared in this application is single-crystal nano-sized orthogonal iron phosphate, reducing the grinding pressure at the lithium iron phosphate end. Simultaneously, its unique octahedral structure is more stable than monoclinic iron phosphate produced by conventional processes, with fewer crystal defects and higher lattice integrity, effectively avoiding the generation of magnetic foreign matter during sintering and contributing to the performance of lithium iron phosphate materials.

Dyeing Kit. The present invention relates to a dyeing kit comprising: a) a dye composition, comprising: a1) 1.5% by weight or more of at least one antioxidant, relative to the total weight of the dye composition, and a2) at least one oxidative dye; and b) a developer composition comprising: b1) from 0.5% by weight to 10% by weight of at least one oxidant, relative to the total weight of the dye composition; wherein the mixture of the dye composition and the developer composition has a pH value of 8.3 or lower. Figure for abstract: none