17results about How to "Avoid excessive oxidation" patented technology

The invention discloses a carbon nanomaterial pretreatment device and a process thereof, and belongs to the technical field of carbon nanomaterial modification and application, the device comprises a pretreatment main body, a roller way conveying mechanism, a sagger and a collecting and releasing dust-free purification area, the roller way conveying mechanism penetrates through the purification area and the pretreatment main body, the pretreatment body is provided with a low-temperature area, a medium-temperature area, a high-temperature area and a cooling area in the material conveying direction, the temperatures of all the temperature areas are independently controlled, an exhaust and detection assembly is arranged, and the roller way conveying speed can be adjusted to control the material retention time. According to the process, carbon nanotubes are fed into a device through dust-free feeding, and the temperatures (300-600 DEG C) of a low-temperature area, a medium-temperature area, a high-temperature area and a cooling area and the protective gas and oxidant atmosphere are accurately regulated and controlled; according to the method, the pretreatment target of'modification but not destruction 'is achieved, the purity, surface activity and dispersity of the carbon nanotubes are synchronously improved, the defect structure is optimized, the specific surface area is increased to 600-1000 m < 2 > / g, and the core performance is remarkably enhanced.

This invention discloses a craft beer flavor enhancement process using oak barrel micro-oxygen aging, belonging to the field of craft beer brewing technology. This process achieves the targeted transformation and accumulation of flavor compounds in craft beer through oak barrel pretreatment, precise control of the micro-oxygen environment, and optimization of aging process parameters. First, the oak barrel undergoes a combined pretreatment of toasting, carbonization, and maceration. Then, the fermented base beer is poured into the pretreated oak barrel, and a stable oxygen concentration is maintained within the barrel through a micro-oxygen control system, aging under suitable temperature conditions. Craft beer brewed using this process exhibits a significantly increased content of characteristic flavor compounds and an effective reduction in the content of off-flavor substances such as acetaldehyde. The beer combines the rich aroma of oak with the refreshing taste of beer, solving the problems of single flavor and prominent off-flavors in traditional aging processes, and significantly improving the quality and market competitiveness of craft beer.

The invention relates to a post-treatment method for a mercury-based II-VI group nanocrystal with a protective layer formed by chemical oxidation, and solves the problems of poor stability and photoelectric property degradation of the mercury-based II-VI group nanocrystal caused by surface oxidation, ligand desorption and environmental sensitivity. An oxide protection layer with the thickness of 1-3 nm is formed on the surface of the nanocrystal, the long-term stability and the photoelectric property of the nanocrystal are improved, and the method comprises the specific steps of centrifugal purification of the nanocrystal, preparation of an oxidizing agent solution, controllable oxidation reaction, functional ligand surface modification and purification treatment. The oxidation layer is ensured to be compact and stable by accurately adjusting the concentration of the oxidant, the reaction temperature and the reaction time. According to the method, oxygen and moisture permeation is effectively blocked, surface defects are reduced, the quantum yield and the photoelectric property are improved, and the method is widely applied to the fields of post-treatment of mercury-based II-VI group nanocrystals and photoelectric devices.

The invention discloses nanometer graphene oxide and a preparation method thereof. The transverse size of the nanometer graphene oxide is 10-100 nm, and the thickness of the nanometer graphene oxide is 1-2.5 nm. The surface chemical structure meets the following conditions: a C1s peak is analyzed on the basis of X-ray photoelectron spectroscopy, the sum of the atomic percent content of hydroxyl and epoxy groups is not higher than 15%, and the atomic percent content of carboxyl is not lower than 6%. According to the structural design, the structural defect caused by excessive oxidation or reduction in a traditional method is avoided, and the chemical stability and the functionalization potential of the material are improved.

The invention discloses a preparation method of an Al-RE intermediate alloy based on an alloy opposite doping method, which comprises the following steps: firstly, industrial pure aluminum Al and mother alloy Al-90RE are taken as raw materials, the raw materials are dried according to a mass ratio meeting the requirement of Al-(10-50) RE, then, the raw materials are melted by adopting a two-stage variable-temperature melting method to obtain an Al-RE melt, then, the Al-(10-50) RE melt is refined, and meanwhile, the Al-RE intermediate alloy is prepared by adopting an alloy opposite doping method. The steel ingot mold is preheated, and finally, the refined Al-RE melt is poured into the preheated steel ingot mold to be cooled, so that an Al-RE intermediate alloy ingot based on the alloy opposite doping method is obtained; rE is one of La, Ce or La + Ce alloy. The obtained Al-RE intermediate alloy is compact in metallographic structure and less in inclusion; in addition, the yield is greater than 90.0%.

This invention discloses a method for repairing and regenerating lithium iron phosphate (LFP) cathode materials, belonging to the field of lithium-ion battery technology. The method involves: firstly, partially oxidizing the LFP cathode material obtained by stripping waste LFP electrode sheets; then, using excess carbon in the LFP cathode material to reduce the oxidized LFP at high temperature, resulting in decarbonized and regenerated LFP cathode material. By controlling the degree of oxidation to partially oxidize the LFP cathode material, and then using excess carbon in the LFP cathode material to reduce the oxidized LFP at high temperature, the decarbonization purpose is achieved, and pure LFP cathode material is obtained. This truly realizes the direct repair and regeneration of LFP cathode materials by decarbonization, ensuring the electrochemical performance of the recycled LFP repaired material.

The application provides a biaxial texture nickel oxide buffer layer and a preparation method and application thereof, and relates to the technical field of coated conductor preparation.The preparation method of the biaxial texture nickel oxide buffer layer provided by the application comprises the following steps: performing recrystallization annealing treatment on a nickel alloy in a reducing atmosphere to obtain a biaxial texture nickel alloy; and performing oxidation treatment on the biaxial texture nickel alloy in an oxidizing atmosphere to obtain the biaxial texture nickel oxide buffer layer.The biaxial texture nickel oxide buffer layer is prepared by using a controllable oxidation recrystallization texture method, the prepared biaxial texture nickel oxide buffer layer has good c-axis orientation, low surface roughness, and good in-plane and out-of-plane growth texture.The preparation process is simple, the operation control is simple, the cost is low, the application is environment-friendly, and the application is suitable for large-scale application.

This invention relates to the field of aluminum foil production technology, specifically a method for treating aluminum powder on the surface of rolled aluminum foil. This method effectively removes aluminum powder adhering to the aluminum foil surface by combining physical and chemical treatments, improving the purity and safety of the aluminum foil. It is applicable to industries such as electronics, electrical appliances, and food packaging. The treatment effect of aluminum powder can be further optimized by controlling static electricity elimination during the rolling process, selecting the cleaning solution, and using controlled atmosphere heat treatment conditions. Furthermore, the introduction of quality inspection ensures that there is no residual aluminum powder on the surface of the treated aluminum foil, improving product reliability and safety. This invention provides a new solution for quality control in the aluminum foil production process.

The invention discloses a preparation process of an LYSO crystal, and relates to the technical field of scintillation crystal material preparation. The preparation process of the LYSO crystal comprises the following steps: preparing an LYSO precursor by a liquid phase method, growing an LYSO crystal sample by a Bridgman-Stockbarger method, and carrying out heat treatment and segmented annealing treatment on the LYSO crystal sample to obtain the LYSO crystal. The LYSO crystal prepared by the process has few oxygen vacancies, high transparency and strong light output, and the crucible material used in the process steps is a calcium oxide stabilized zirconia crucible, so that the instrument cost is greatly reduced.

This invention relates to a method for enhancing the stirring intensity during vanadium extraction, belonging to the field of steel pretreatment. The method includes the following three steps: first, vanadium-containing molten iron is added to a converter; then, a top-and-bottom blowing process is used for smelting; coolant is added according to the composition and temperature at the smelting endpoint; finally, semi-steel is removed from the lance at the smelting endpoint. The top-blown gas is an oxygen-nitrogen mixture, and the total flow rate of the oxygen-nitrogen mixture is 31,000~35,000 Nm³. 3 / h; the oxygen consumption per ton of iron, the top blowing lance position, and the nitrogen consumption per ton of iron are controlled in segments according to the blowing period; the bottom blowing gas is nitrogen, and the nitrogen supply intensity is controlled in segments according to the blowing period. This invention significantly enhances the stirring intensity of the molten pool without significantly increasing the temperature rise rate through the synergistic effect of the high-flow-rate oxygen-nitrogen mixed gas from the top and the variable-flow-rate nitrogen from the bottom, thereby shortening the mixing time and enhancing the slag-metal reaction, further increasing the vanadium oxidation amount and further reducing the TFe content in the vanadium slag.

The invention provides a method for synthesizing ethylene glycol from ethylene, which comprises the following steps: in the presence of a free radical inhibitor, ethylene, hydrogen peroxide and a titanium silicalite molecular sieve are contacted in a mixed solution of water and an optional organic solvent to carry out oxidation-hydration one-step reaction, and the addition amount of the free radical inhibitor is 0.005-5wt% of the addition amount of the hydrogen peroxide. By introducing the efficient free radical inhibitor and selectively inhibiting a side reaction path, generation of acidic impurities is remarkably reduced, selectivity and product purity of ethylene glycol are improved, and the method is suitable for industrial production.

This invention belongs to the field of pharmaceutical chemical synthesis technology and relates to a method for the catalytic oxidation of acetate tetraenes to synthesize dihydroxy compounds. The method uses acetate tetraenes as a raw material, acetone as a solvent, Ru-X-Y as a catalyst, and sodium hypochlorite as an oxidant. Under alkaline conditions, catalytic oxidation yields the product dihydroxy compound. In Ru-X-Y, X is Pt or Pd, and Y is any one of Fe, Mn, and Cu. This invention uses solid Ru-X-Y as a catalyst, utilizing the synergistic activation and polarization properties of metals. It only requires sodium hypochlorite, which has relatively weak oxidizing power, as an oxidant to catalytically oxidize acetate tetraenes to the target product dihydroxy compound, effectively avoiding the use of strong oxidants such as potassium permanganate. This not only prevents over-oxidation and improves product yield and quality but also increases production efficiency, resulting in significant economic and social benefits.

The invention discloses a high-entropy perovskite supported catalyst as well as a preparation method and application thereof. The catalyst comprises a perovskite carrier and iridium nanoclusters dispersed on the perovskite carrier, wherein the perovskite carrier is a high-entropy perovskite carrier of which the B site is occupied by five different transition metal elements, and the five different transition metal elements comprise Ir, Ti, Ni, Co and Mo; the mass ratio of the iridium nanocluster to the perovskite carrier is (0.6-1): 1; the catalyst has a rooting structure in which an active component iridium element is simultaneously distributed in a perovskite bulk phase and an iridium nanocluster. The prepared rooting type high-entropy perovskite carrier supported iridium catalyst shows good catalytic activity and catalytic stability in proton exchange membrane water electrolysis equipment, and the problem that iridium active species in a proton exchange membrane water electrolysis anode supported catalyst are prone to agglomeration and falling off under the reaction condition is effectively solved.

The present application relates to the technical field of zinc base powder additive manufacturing, and particularly relates to a zinc base powder additive manufacturing system and a manufacturing method thereof, the following steps: obtaining zinc base alloy powder, performing surface activation treatment through plasma jet; determining cold spraying process parameters based on oxygen content of the activated powder; performing cold spraying-laser composite deposition to form a dense blank on a substrate layer by layer; determining a metallurgical bonding state between the deposition, and triggering selective laser remelting to eliminate interface defects. The present application generates a composite oxide layer on the powder surface through Ar-mixed gas and 8-12kW power plasma jet treatment, can prevent excessive oxidation, and can improve powder activity, thereby laying a good foundation for subsequent spraying deposition.

This invention relates to the field of lithium-ion battery applications and discloses a top-sealing process for a pouch battery. The process includes: placing the top sealing edge of the pouch battery to be packaged between an upper sealing head and a lower sealing head of a top-sealing device; driving the upper sealing head to close with the lower sealing head; hot-pressing the positive tab region of the pouch battery using a first set of packaging parameters; simultaneously hot-pressing the negative tab region of the pouch battery using a second set of packaging parameters; and hot-pressing other regions besides the positive and negative tab regions using a third set of packaging parameters. The first set of packaging parameters includes a first packaging temperature and a first packaging time, and the second set of packaging parameters includes a second packaging temperature and a second packaging time. The first packaging temperature is higher than the second packaging temperature, and the first packaging time is shorter than the second packaging time.

This invention discloses a novel application of CdS-Cdln2S4 in the two-phase oxidation-reduction of toluene and water to prepare benzyl alcohol, benzaldehyde and hydrogen. It can be used for green, efficient and selective oxidation of toluene to prepare benzyl alcohol and benzaldehyde, preventing excessive oxidation of toluene to benzoic acid or carbon dioxide, and can synergistically reduce water to prepare hydrogen. It has the advantages of high selectivity, low energy consumption and low pollution.

The invention provides a lithium battery silicon-based negative electrode binder as well as a preparation method and application thereof, and belongs to the technical field of lithium ion batteries. According to the invention, polyacrylic acid is taken as a matrix, zinc ions and nickel ions are introduced to form a dynamic coordination bond network, and 3, 4-ethylenedioxythiophene (i.e., EDOT) monomers are subjected to in-situ polymerization to generate a poly (3, 4-ethylenedioxythiophene) (i.e., PEDOT) conductive polymer, so that the water-based composite binder with dynamic self-repairing capability and a conductive ion-conductive electron bicontinuous network structure is constructed; the technical problems that a traditional binder is insufficient in binding force in a silicon negative electrode, poor in flexibility, free of conductivity and difficult to adapt to large-volume change of a silicon material are solved. The negative electrode binder can be used in the fields of high-energy-density lithium ion batteries, fast-charging batteries, flexible or miniature electronic equipment and the like, and has great development potential in the fields of high-end power batteries, energy storage systems and the like.