36 results about "Ammonium hydroxide" patented technology

The application discloses a preparation method and purification process of copper hydroxide, a certain amount of anhydrous copper sulfate is accurately weighed, and a certain volume of deionized water is added to prepare a solution with a certain concentration, a copper ammonia solution is prepared: slurry is prepared from circuit board sludge, screening is performed, ammonium bicarbonate or ammonium carbonate is added for reaction, and a copper ammonia solution containing carbonate or bicarbonate is obtained through purification; in addition, high-purity copper powder is added into concentrated ammonia water, concentrated hydrogen peroxide solution is slowly dropped into the concentrated ammonia water, and the dropping is continued until no large amount of bubbles is generated in the solution, and the solution is filtered to obtain a clear indigo blue solution. The production process adds the step of adding a stabilizer and stirring, guarantees the stable state of the copper hydroxide crystal, and enables the copper hydroxide crystal to remain unchanged into copper oxide for one year in an environment with a temperature as high as 60 degrees.

The application discloses a synthesis method of ZSM-35 and ZSM-5 composite zeolite, the composite zeolite takes ZSM-35 as a core and takes ZSM-5 as a shell, and the synthesis method comprises the following steps: (1) uniformly mixing ZSM-35 zeolite, a silicon source, an aluminum source, a template agent, ammonium hydroxide, alcohol and water; then sequentially performing dynamic treatment and static treatment; then separating solid substances and drying the solid substances; (2) mixing the dried substances obtained in the step (1) with inorganic alkali and water, and evaporating water to prepare dry gel; (3) performing crystallization by adopting a gas phase crystallization method, and then performing separation, drying and calcination to obtain the composite zeolite. The ZSM-35 and ZSM-5 composite zeolite can keep the integrity and crystallinity of the ZSM-35 and ZSM-5 skeleton structures, and the core and the shell are combined closely, are not separated and are stable in structure.

This invention relates to a copper-modified NaX molecular sieve adsorbent, its preparation method, and its application, and relates to the field of adsorption and separation materials technology. The preparation method of this invention includes the following steps: (1) mixing powdered NaX molecular sieve and copper ammonia solution to obtain a mixed suspension; filtering the mixed suspension under reduced pressure to separate the solid product; washing and filtering the solid product to obtain a wet molecular sieve solid; (2) vacuum drying the wet molecular sieve solid; grinding the solid to obtain a powder sample; and calcining the powder sample at a constant temperature to obtain the copper-modified NaX molecular sieve adsorbent. The preparation method of this invention significantly simplifies the process flow, reduces production costs, and produces a copper-modified NaX molecular sieve adsorbent with high pore utilization and high active site density, significantly improving the adsorption performance of NaX molecular sieve for boron and phosphorus impurities.

The utility model discloses a kind of tetraalkyl ammonium hydroxide recovery devices, it is related to tetraalkyl ammonium hydroxide recovery technical field, and wherein, tetraalkyl ammonium hydroxide recovery device includes adsorption unit and desorption unit, adsorption unit includes adsorption device, adsorption cavity of adsorption device is filled with adsorbent, liquid inlet line is used to introduce waste water and / or regenerating medium, liquid outlet line is used to discharge reclaimed water and / or tetraalkyl ammonium hydroxide solution, desorption unit includes desorption reagent line and / or desorption device;By adsorbent directly absorbing tetraalkyl ammonium hydroxide in waste water, the complexity of processing is reduced, the consumption of reagent is reduced, can be realized by desorption reagent or desorption device tetraalkyl ammonium hydroxide desorption, and the regeneration of adsorbent is realized, and after desorption, pure tetraalkyl ammonium hydroxide can be used for developing again by adjusting concentration and discharging reclaimed water, while realizing waste water purification, resource recovery and cost control.

A carbon dioxide mineralization process is disclosed, which includes introducing ammonium hydroxide solution and a calcium chloride solution into a reaction vessel to form a mixed solution, introducing carbon dioxide gas into the reaction vessel, and forming a calcium carbonate precipitate. Implementations of the carbon dioxide mineralization process can include where the mixed solution further may include tannic acid. A concentration of tannic acid can be from about 0 mg / mL to about 2 mg / mL. A flow rate of the introduction of carbon dioxide gas can be from about 0 L / min to about 1.0 L / min. The carbon dioxide mineralization process may include providing ultrasonic energy at a frequency of from about 20 khz to about 130 khz to the mixed solution. The carbon dioxide mineralization process may include filtering the calcium carbonate precipitate through a polyvinylidene fluoride membrane. The calcium carbonate precipitate may include a metastable vaterite phase.

The present invention provides: an aqueous composition capable of removing a photoresist from a printed wiring board or a semiconductor wafer while preventing corrosion of tin plating and tin alloy plating in addition to a copper wiring; and a method for removing a photoresist using the aqueous composition. The aqueous composition according to the present invention is characterized by comprising an alkanolamine (A), a quaternary ammonium hydroxide (B), a sugar alcohol (C), a polar organic solvent (D), and water (E), wherein, with respect to the total amount of the composition, the content of the alkanolamine (A) is 2.5-50 mass %, the content of the quaternary ammonium hydroxide (B) is 0.5-4 mass %, and the content of the sugar alcohol (C) is 0.5-20 mass %.

A method for preparing aluminum hydroxide dry powder and its sol, and its application, relates to the field of vaccine adjuvant preparation. The method includes: preparing an ammonia solution or sodium hydroxide solution; preparing an aluminum chloride solution; neutralizing the ammonia solution or sodium hydroxide solution with the aluminum chloride solution at 15-20°C to generate a milky white, translucent colloidal suspension; filtering; freeze-drying followed by aging to obtain aluminum hydroxide dry powder; adding the dry powder to a sodium chloride electrolyte solution, processing it in a high-speed shear disperser, redispersing the dry powder into a sol at a certain temperature, and homogenizing it cyclically in a high-pressure homogenizer to obtain aluminum hydroxide sol; removing electrolytes from the aluminum hydroxide sol using electrodialysis, followed by high-pressure sterilization and packaging. This invention solves the problems of clumping and sedimentation during sterilization and storage, poor stability, inconvenience in transportation and use, and limited concentration in existing aluminum hydroxide adjuvant preparation methods.

This invention belongs to the field of battery cathode material technology, specifically relating to a core-shell structured manganese tetroxide, its preparation method, and its application. The preparation method of the core-shell structured manganese tetroxide of this invention includes the following steps: (1) adding PEG, ZIF-8, and Zn to a container containing a manganese sulfate solution. 2+ (1) Ammonia solution is introduced into the container and heated to react; (2) After the reaction is completed, the solid and liquid are separated, and the obtained solid is washed and dried to obtain an intermediate product; (3) The intermediate product is calcined to obtain the core-shell structured manganese tetroxide. The core-shell structured manganese tetroxide of the present invention helps to solve the problems of rapid cycle decay, poor rate performance or insufficient compaction density in the sintering preparation process of lithium manganese oxide using manganese tetroxide in the prior art.

This invention relates to a method for preparing yttrium oxide with a large specific surface area. The method includes the following steps: S1, dissolving yttrium salt and adding tetramethylammonium hydroxide to precipitate; S2, washing with distilled water and centrifuging to dehydrate; S3, washing with ethanol and dehydrating; S4, adding diethylene glycol monobutyl ether and mixing evenly to form a paste; S5, calcining the paste formed in step S4 at a low temperature to form a powder; S6, adding anhydrous ethanol to the powder obtained in step S5 and ball milling; S7, drying. This invention uses tetramethylammonium hydroxide for precipitation, whose spatial structure reduces agglomeration. After washing, multiple washes with ethanol remove moisture, and then diethylene glycol monobutyl ether solution is added to form a paste, further reducing agglomeration during calcination. The calcination temperature is only 600-750℃, which is energy-saving and environmentally friendly. During ball milling, anhydrous ethanol is added, eliminating moisture during the process and reducing agglomeration. The yttrium oxide prepared by this method has a specific surface area of ​​100-200 m² / g. 2 / g.

This application discloses a nano-tetragonal barium titanate and its process-enhanced continuous preparation method, belonging to the field of barium titanate preparation technology. The process-enhanced continuous preparation method for nano-tetragonal barium titanate includes the following steps: preparing a circulating mother liquor, a titanium tetrachloride acid hydrolysate, a barium chloride solution, and an ammonia solution; adding the titanium tetrachloride acid hydrolysate dropwise to the barium chloride solution to obtain a titanium-barium mixture; passing the titanium-barium mixture, the circulating mother liquor, and the ammonia solution into a microdroplet process-enhanced device for mixing and reaction; after heat preservation and aging, and solid-liquid separation, obtaining a mixed precipitate and a first filtrate; dissolving the mixed precipitate in a solvent, filtering to obtain barium oxalate tetrahydrate and a second filtrate; calcining the barium oxalate tetrahydrate to obtain nano-sized tetragonal barium titanate powder. By employing a microdroplet process-enhanced method, the titanium-barium mixture and the ammonia solution are dispersed into microdroplets smaller than 10 μm, enhancing the degree of material mixing, improving the mass transfer rate, and obtaining nano-barium titanate with small particle size and high purity.

The application provides a fly ash-based chromium-cerium loaded hollow ZSM-5 molecular sieve catalyst and a preparation method and application thereof, and relates to the field of catalysts. The preparation method comprises the following steps: mixing water, fly ash and sodium hydroxide, stirring, activation treatment, solid-liquid separation and drying to obtain primary zeolite; mixing the primary zeolite, sodium hydroxide and water, stirring, adding tetrapropylammonium hydroxide and stirring, adding silica sol and stirring, adding crystal seeds and stirring, hydrothermal reaction, solid-liquid separation, drying, calcination; mixing ZSM-5 molecular sieve and tetrapropylammonium hydroxide, hydrothermal reaction, solid-liquid separation, drying, calcination, and then ion exchange with an ammonium nitrate aqueous solution to obtain hollow ZSM-5 molecular sieve; and mixing a chromium source, a cerium source and the hollow ZSM-5 molecular sieve, aging, drying and calcination. The catalyst provided by the application has excellent catalytic performance in the aspects of synergistic catalytic oxidation of chlorinated aromatic hydrocarbons and mercury.

The present disclosure relates to a kind of UZM-8 molecular sieve and its preparation method, catalyst and application containing UZM-8 molecular sieve, the method includes: the raw material mixture containing silicon aluminum source, first template agent, second template agent and water is carried out hydrothermal crystallization reaction and recovers product;Wherein, the first template agent is at least one selected from tetramethylammonium hydroxide, tetraethylammonium hydroxide, tetrapropylammonium hydroxide and tetrabutylammonium hydroxide, the second template agent is dimethyl diethyl ammonium hydroxide.Compared with the UZM-8 molecular sieve synthesized by traditional hydrothermal method, the UZM-8 molecular sieve with high crystallinity, high specific surface area and pore volume can be synthesized in the present disclosure, while the synthesis cost of molecular sieve is significantly reduced.

Provided are a processing liquid for semiconductor devices, a method for processing a substrate, and a method for manufacturing a semiconductor device, the processing liquid including a quaternary ammonium hydroxide compound, a cyclic ether compound, and an alkyl ketone, wherein the total of the the cyclic ether compound content and the alkyl ketone content is 0.001 ppm or more and less than 5 ppm.

This invention discloses an apparatus and method for efficiently desorbing rhenium-containing solutions from rhenium-absorbing resin. The apparatus includes a primary adsorption tank, a secondary adsorption tank, a tertiary adsorption tank, and a desorption reagent tank. Each adsorption tank is filled with resin. Pure water, nitric acid, ammonium chloride, and ammonium hydroxide are injected into the desorption reagent tank to prepare the desorption reagent. By adding a nitric acid metering tank, an ammonium chloride metering tank, and a pH meter to the desorption apparatus, the concentrations of nitric acid, ammonium chloride, and ammonium hydroxide in the desorption reagent are ensured to be 0.1%, 7%, and 2%, respectively. The prepared desorption reagent is transported to each adsorption tank through a desorption liquid delivery pipeline, thereby desorbing and collecting rhenium ions from the resin. This invention uses a composite desorption reagent that can fully react with the rhenium ions on the resin, improving the rhenium recovery rate. The synergistic effect of 0.1% nitric acid and 7% ammonium chloride significantly enhances the selectivity of the composite reagent for rhenium, improving rhenium purity. It does not damage the resin skeleton, extending the resin's lifespan.

This invention discloses a method for preparing and applying highly dense silver-coated copper powder. The method comprises the following steps: First, in a first solvent, pretreated copper powder, a copper complexing agent, a dispersant, p-benzoquinone, and slow-release microspheres coated with a reducing agent are mixed, and the pH is adjusted to 10-11.5 to obtain a first mixture; then, silver ammonia solution is added, and the reaction proceeds to obtain a second mixture; wherein the redox potential during the reaction is 0.6-0.75V; finally, the second mixture is cooled, washed, and dried, and then processed by an air jet mill to obtain the final product. This method eliminates the need for a complex silver liquid / reducing agent dropwise control system, requiring only temperature and stirring control. The reaction endpoint is determined by monitoring the ORP, which helps reduce operational difficulty and uncertainty in industrial scale-up. Furthermore, the resulting silver-coated copper powder exhibits advantages such as high density and low volume resistivity.

This invention provides a nickel-based single-crystal hydroxide precursor, a single-crystal cathode material, and a method for preparing the same. The precursor preparation method includes: preparing a mixed salt solution containing nickel, cobalt, and manganese salts; adding the mixed salt solution, ammonia solution, and sodium hydroxide solution concurrently to a reactor containing a base liquid under an inert atmosphere and stirring conditions, controlling the pH to carry out a staged nucleation-ripening reaction; after the reaction, adjusting the pH of the system, waiting for the nickel-based single-crystal hydroxide nuclei to grow to a predetermined particle size, and then aging, filtering, washing, and drying to obtain the nickel-based single-crystal hydroxide precursor. The single-crystal cathode material preparation method includes uniformly mixing the precursor with a lithium source, and then sintering in stages under an oxygen atmosphere to obtain the single-crystal cathode material. This invention enables the controllable preparation of highly dispersed, large-sized single-crystal hydroxide precursors; the prepared cathode material has advantages such as high specific capacity, good rate performance, and excellent reversibility.

This invention discloses a high-efficiency potassium-based CO2 adsorbent and its preparation method. The preparation method of the high-efficiency potassium-based CO2 adsorbent includes: dissolving a first template agent, isopropanol, and sodium chloride in water to obtain a first solution, wherein the first template agent includes polyethylene glycol hexadecyl; adding an aluminum salt and a second template agent to the first solution and stirring for a first set time to obtain a second solution, wherein the second template agent includes carbon black and cyclohexane; adding an ammonium hydroxide solution to the second solution and reacting at a first set temperature for a second set time, filtering to obtain an intermediate product; washing, drying, and heat-treating the intermediate product to obtain an alumina support; and loading potassium carbonate onto the alumina support to obtain the high-efficiency potassium-based CO2 adsorbent. According to the preparation method of the high-efficiency potassium-based CO2 adsorbent of this invention, the specific surface area and pore capacity of the alumina support are increased, thereby improving the dispersibility of the active ingredient potassium carbonate attached to the alumina support and enhancing the adsorbent's collection capacity and cycle stability.

The application provides antibacterial flaky silver-coated copper powder, a preparation method thereof and antibacterial fabric, and the preparation method comprises the following steps: mixing flaky copper powder with an alkaline solution to perform alkali washing to remove oil, to obtain pretreated copper powder; then, the pretreated copper powder is dissolved in water with an activation dispersant to perform activation and dispersion, to obtain an activated copper powder solution; a complexing agent is added into the activated copper powder solution, and the pH value is adjusted to weak alkalinity; then, a reducing agent solution and a silver-ammonia solution are added to perform a reduction reaction, to obtain flaky silver-coated copper powder; the flaky silver-coated copper powder is mixed with an aluminum source precursor to perform a gas phase chemical deposition reaction, to obtain flaky silver-coated copper powder with an alumina layer on the surface, i.e., the antibacterial flaky silver-coated copper powder; and the activation dispersant is obtained by addition reaction of polyvinylpyrrolidone and aminobenzenesulfonic acid. The antibacterial flaky silver-coated copper powder obtained by the application can completely replace pure silver material to some extent, can reduce the cost, and can effectively improve the antibacterial performance of the fabric after finishing modification.

The present invention relates to a method for preparing sodium bicarbonate and gypsum using sodium sulfate to adjust the particle size, and a sodium bicarbonate preparation apparatus, and more particularly, to a method for preparing sodium bicarbonate, a method for preparing gypsum, and a reactor for preparing sodium bicarbonate, the method for preparing sodium bicarbonate including the steps of generating a sodium sulfate solution containing sodium ions from a mixture of a leaching agent and a substance containing sodium sulfate, adding carbon dioxide and ammonia to the sodium sulfate solution to generate sodium bicarbonate (NaHCO3), and heating the sodium bicarbonate at a temperature of 60-100°C to adjust the particle size of the sodium bicarbonate, the method for preparing gypsum further including the step of adding a calcium-containing substance to a filtrate remaining after the sodium bicarbonate is recovered in the step of generating sodium bicarbonate to generate gypsum, and the reactor for preparing sodium bicarbonate including a leaching reactor that leaches sodium ions from a substance containing sodium sulfate by a leaching agent to generate a sodium aqueous solution, a carbonation reactor that supplies a carbon dioxide-containing gas or a carbonation solution and an ammonia-containing gas or an ammonia solution to the sodium aqueous solution and generates sodium bicarbonate (NaHCO3) by a reaction, and a particle size reactor that coarsens the particle size of sodium bicarbonate at 60-100°C in a sodium bicarbonate generation aqueous solution.

The present invention can provide a composition for removing a photoresist, which is for forming a copper-containing pattern, after the pattern has been formed, including:an alkaline agent containing at least one selected from the group consisting of an alkanolamine, a quaternary ammonium hydroxide, and an inorganic alkali;an organic solvent having Hansen solubility parameter coordinates that are within an area of a sphere centered on δd=16.0, δp=8.7, δh=15.5 within a radius of 3.60 MPa0.5 or less, andan azole compound.

To provide a system for supplying a rinsing liquid comprising ultra-pure water and ammonia gas.SOLUTION: A system (100) for supplying a rinsing liquid including ultrapure water and ammonia gas includes an ultrapure water source (102) configured to supply ultrapure water to a contactor (110), a gas mixture source configured to supply ammonia gas and a carrier gas to the contactor (110), a control unit configured to maintain an operating pressure of the contactor (110) below a pressure threshold, the contactor (110) configured to generate the rinsing liquid, and a pump (150) configured to deliver the rinsing liquid including a gas partial pressure below the pressure threshold to an outlet.SELECTED DRAWING: Figure 1

This invention relates to a new method of manufacturing an improved soil rejuvenator , effective for enhancing agricultural productivity. The soil rejuvenator is 3 to 5 times more efficacious. It means that this produces comparable impact on soil fertility at only 20 to 33% dose of .the standard humic acids produced through already known art. The coal is pulverized to particle size of 2.0 mm to 4 mm and then spread on a containment floor. Hydrogen per oxide in quantity 10% of coal and diluted with equal amount of water is sprayed. Then the treated coal is charged in a reactor and stirred to form homogenized slurry by adding water in quantity 40 to 50 % of the coal. Hydrogen peroxide slow addition in continuous drips is started until total quantity of 15 to35% of the weight of coal is added during vigorous stirring conditions. After completion of reaction, more water is added and then liquid containing fulvic acids is separated by centrifuging the material. The fluid separated from slurry is in pH range 0.5 to 1.5 and contains 4 to 8% solubalized fulvic acids. The solids separated from slurry are rich in Lumic acids and transferred to a reaction vessel to which water in volumes 2 to 3 times of the coal is added and slurred by stirring. The pH is slowly raised to 10.0 to 12.0 by adding sodium hydrd-oxide or potassium hydro-oxide or Ammonium Hydroxide. Stirring is done until desired specifications (SG 1.091.1) of the extract is achieved. The liquid extract may for example find application as rejuvenator of soils, which are poor in organic matter or poor for agriculture purpose due to overuse. The said extract is also used in organic fertilizers. The fulvic Acid produced during the process may also be used for improving soil where germination of seeds is not uniform.

The application discloses a method for removing trace water from carbon dioxide, which comprises the following steps: firstly, mixing tetrapropylammonium hydroxide and deionized water uniformly to obtain solution A; dissolving potassium aluminate in the solution A to obtain solution B; adding tetraethyl orthosilicate into the solution B drop by drop, stirring and mixing; transferring the solution C into a hydrothermal kettle to react for at least 2 hours; after the reaction is completed, taking out the reaction product, washing with water, centrifugal separation and drying; continuously heating to 550 DEG C, calcining for at least 2 hours to obtain K-ZSM-5; preparing an ethanol solution of potassium ethoxide, immersing the K-ZSM-5 in the ethanol solution of potassium ethoxide, removing ethanol from the immersed K-ZSM-5 under vacuum, and obtaining an adsorbent; filling the adsorbent into an adsorption column, passing carbon dioxide into the adsorption column, and removing water in the carbon dioxide by using a chemical adsorption method. The preparation method of the adsorbent is simple, the material is easy to obtain, the whole impurity removal stage does not need high temperature, the impurity removal method is simple, the efficiency is relatively high, and the water content can be reduced to below 20 ppb.

The application belongs to the technical field of chemical production, and particularly relates to a solid tetramethylammonium hydroxide preparation method and a preparation device. The solid tetramethylammonium hydroxide preparation method comprises the following steps: S1. tetramethylammonium hydroxide aqueous solution and nitrogen are mixed in a spraying device to obtain mixed slurry; S2. the mixed slurry is atomized to form dry powder particles to obtain solid tetramethylammonium hydroxide; the nitrogen is sent to the spraying device after being heated, and the temperature of the heating is 80-90 DEG C. The solid tetramethylammonium hydroxide preparation method provided in the application uses nitrogen heating atomization technology, completely abandons the traditional organic solvent dehydration process, fundamentally eliminates the risk of flammability and explosiveness, and avoids the high energy consumption link of solvent recovery by rectification. The solid tetramethylammonium hydroxide obtained by the method provided in the application has a lower water content than the tetramethylammonium hydroxide pentahydrate crystal, has uniform particle size, and is beneficial to the use effect of a semiconductor photoresist cleaning agent.

This invention discloses an environmentally friendly and efficient 4H-SiC polishing slurry and its preparation method, belonging to the technical field of polishing compositions. The 4H-SiC polishing slurry of this invention comprises the following components: 1.5 wt.%~6 wt.% abrasive, 0.2 wt.%~0.4 wt.% photocatalyst, 2 wt.%~4 wt.% H2O2, an organic base pH adjuster to adjust the pH value of the 4H-SiC polishing slurry to 8~11, and the balance being water; wherein the organic base pH adjuster includes at least one of tetramethylammonium hydroxide, tetraethylammonium hydroxide, and choline hydroxide. The composition design of this invention is simple and easy to prepare. It has a high material removal rate for 4H-SiC, significantly reduces surface roughness after polishing, and is environmentally friendly and pollution-free, possessing the advantages of being environmentally friendly and efficient, and has broad application prospects in high-precision polishing of 4H-SiC.

The application relates to the technical field of cement materials, and particularly discloses a high-carbonization-resistance type supersulfated cement material, a preparation method thereof and application. The material comprises the following components in parts by weight: 50-70 parts of slag powder, 10-20 parts of a sulfate activator, 15-25 parts of calcium sulphosilicate, 1-5 parts of lithium-based alkali silicate and 0.2-0.8 parts of benzyltrimethylammonium hydroxide. The preparation method comprises the following steps: (1) uniformly mixing the slag powder, the sulfate activator, the calcium sulphosilicate and the lithium-based alkali silicate to obtain a powder; (2) uniformly mixing the benzyltrimethylammonium hydroxide and water to obtain a benzyltrimethylammonium hydroxide solution; and (3) uniformly mixing the benzyltrimethylammonium hydroxide solution and the powder, thereby obtaining the product. The application utilizes the synergistic effect of the constructed quaternary ammonium alkali-lithium-based alkali silicate composite alkaline activation system and the calcium sulphosilicate, thereby improving the carbonization resistance of the supersulfated cement and the mechanical properties of the cement.

This application relates to the fields of molecular sieve synthesis and catalytic chemistry, disclosing a multifunctional titanium-silicon molecular sieve TS-1 nanosheet, its preparation method, and its applications. The nanosheet is prepared from 2 parts of TS-1 nanosheet support, 0-0.026 parts of gold source precursor, and 0-0.028 parts of palladium source precursor. The preparation process involves adding urea to a system containing tetrapropylammonium hydroxide and a silicon source to regulate morphology, adding a titanium source dropwise, and then hydrothermally crystallizing after alcohol removal to obtain the support. The support is then loaded with a metal active component and activated by impregnation. The nanosheet support grows in a confined manner along the b-axis to form a two-dimensional sheet structure. In applications, it catalyzes the in-situ generation of hydrogen peroxide from hydroxide in the same reaction system, and allows it to participate in the cyclohexanone ammoniation reaction to generate cyclohexanone oxime. This invention solves the problems of easy decomposition and storage and transportation safety risks associated with pre-prepared hydrogen peroxide, improves atom utilization and catalytic cycle stability, significantly shortens the process, reduces production costs, and improves process safety.

This invention relates to the field of cement materials technology, specifically disclosing a high carbonation-resistant hypersulfate cement material and its preparation method and application. The material comprises the following components: 50-70 parts by weight of slag powder, 10-20 parts by weight of sulfate activator, 15-25 parts by weight of calcium sulfosilicate, 1-5 parts by weight of lithium-based alkaline silicate, and 0.2-0.8 parts by weight of benzyltrimethylammonium hydroxide. The preparation method comprises: (1) mixing the slag powder, sulfate activator, calcium sulfosilicate, and lithium-based alkaline silicate to obtain a powder. (2) mixing the benzyltrimethylammonium hydroxide with mixing water to obtain a benzyltrimethylammonium hydroxide solution. (3) mixing the benzyltrimethylammonium hydroxide solution with the powder to obtain the final product. This invention utilizes the constructed quaternary ammonium base-lithium-based alkaline silicate composite alkaline activation system in synergy with calcium sulfosilicate, which not only improves the carbonation resistance of hypersulfate cement but also improves the mechanical properties of the cement.

This invention relates to a method for preparing and applying a cobalt-deficient cobalt selenide-anchored high-loading Pt single-atom catalyst. Selenium powder is mixed with sodium hydroxide solution to obtain material A. Cobalt salt is mixed with EDTA-2Na solution to obtain material B. Material B and material A are mixed and subjected to a hydrothermal reaction. The resulting product is centrifuged, dried, and dispersed in anhydrous ethanol. Potassium thiocyanate powder is then added, and the mixture is ultrasonically exfoliated, centrifuged, washed, dried, and calcined to obtain Co-deficient cobalt selenide. This cobalt selenide is uniformly dispersed in an ammonium hydroxide aqueous solution. Under alkaline conditions, an ammonia solution containing tetraammineplatinum nitrate is added, and the reaction is carried out at room temperature for 24 hours. After centrifugation, washing, drying, and calcination, the desired product is obtained. This invention provides a simple preparation method that enables rapid and low-cost preparation of Co-deficient cobalt selenide under mild conditions. The Co-deficient cobalt selenide can anchor high-loading Pt single atoms, improving the stability of the Pt single atoms and thus enhancing the catalytic activity and selectivity of the catalyst for oxygen reduction to H₂O₂.

This invention discloses a room-temperature curing lithium potassium silicate-based inorganic anti-corrosion coating, its preparation method, and its application, belonging to the field of anti-corrosion coating technology. The room-temperature curing lithium potassium silicate-based inorganic anti-corrosion coating disclosed in this invention, by mass percentage, comprises the following raw materials: 35-45% lithium silicate aqueous solution, 1-10% potassium silicate aqueous solution, 10-15% titanium dioxide, 8-12% calcined kaolin, 15-22% ultrafine heavy calcium carbonate, 3-8% chromium oxide green, 0.2-0.5% dispersant, 0.2-0.5% wetting agent, 0.2-0.5% defoamer, 0.1-0.5% tetramethylammonium hydroxide, 0.05-0.3% aminosilane coupling agent, and the balance deionized water; the pH value of the inorganic anti-corrosion coating is 9-11. This invention solves the technical problem of insufficient thermal stability after mixing existing compound systems with powders.