110 results about "Peracetic acid" patented technology

The invention discloses a composite catalyst in a Fe3O4 nanoparticle confined carbon nanotube and application of the composite catalyst in degradation of bisphenol pollutants in water, and belongs to the technical field of environmental protection and water treatment. According to the catalyst, Fe3O4 nano-particles with the particle size of 1-5 nm are confined in inner channels of multi-walled carbon nanotubes (CNTs), stable Fe-C bonds are formed between Fe atoms and carbon atoms on the inner walls of the CNTs, a nano confinement structure is constructed, and the stability and electron transfer efficiency of the catalyst are improved. When the catalyst is used for activating peracetic acid (PAA), bisphenol pollutants in water can be quickly and efficiently removed. The catalyst can keep high-efficiency degradation performance in a wide range of pH value of 4-12, the degradation efficiency is still kept at 95% or above after the catalyst is recycled for 10 times, and the catalyst shows remarkable stability and practicability. The invention provides a novel catalyst which is excellent in performance, economical and environment-friendly and a process method for the field of actual water treatment.

The invention discloses a composite catalyst for a peracetic acid activation system and a preparation method and application thereof, and relates to the technical field of advanced oxidation water treatment. The preparation method of the catalyst comprises the following steps: preparing an aqueous solution of a cobalt source as a precursor solution; adding a manganese source into the precursor solution to obtain a Co-Mn mixed salt solution; adding a complexing agent into the Co-Mn mixed salt solution to form a stable sol system; heating the sol system at constant temperature to obtain wet gel; drying the wet gel to obtain a porous dry gel precursor; calcining the porous xerogel precursor, and then cooling and grinding to obtain the composite catalyst for the peracetic acid activation system. The composite structure in the catalyst greatly improves the rate of generating hydroxyl radicals and organic oxygen radicals by decomposing peracetic acid by promoting electron transfer circulation of a metal active center, shows good structural stability and recyclability, and is especially suitable for degradation of an organic pollutant sulfamethoxazole in a water body.

The invention discloses a copper-cobalt bimetallic catalyst and a preparation method and application thereof. The preparation method comprises the following steps: mixing ZIF-67, a copper source and a solvent, adjusting the pH value to 7.0, stirring, standing, centrifuging, washing and drying to obtain ZIF-67 adsorbed with copper ions, and calcining to obtain the copper-cobalt bimetallic catalyst. Compared with a conventional cobalt-based bimetallic catalyst, the copper-cobalt bimetallic catalyst prepared by the invention has the advantages of large specific surface area, multiple catalytic active sites, high catalytic activity, good structural stability and the like, is a novel catalyst with a novel structure and excellent performance, can efficiently activate peracetic acid and is used for degrading antibiotics; the method can realize deep oxidative degradation of various antibiotics in different water bodies, has the advantages of high reaction system activation rate, high degradation efficiency, wide pH application range, good reusability, low metal leaching amount, no secondary pollution and the like, and is high in use value and good in application prospect.

The invention discloses a preparation method and application of an iron carbide nanoparticle modified carbon-based Fe monatomic catalyst, in the preparation process, Fe < 3 + > is complexed with oxalic acid in advance to realize coordination self-assembly and effectively inhibit hydrolysis of Fe < 3 + >, and glucose is used as a carbon-based carrier precursor and a reducing agent to prepare a carbon-based Fe monatomic catalyst. According to the preparation method, the self-assembled iron species are converted into Fe3C nanoparticles at a high temperature, melamine and cyanuric acid are used as N sources to realize N-doped carbon and anchor part of the iron species to form Fe monatomic atoms, and in addition, oxalic acid, melamine and cyanuric acid are easy to decompose at the high temperature to generate small-molecule gas, so that glucose forms a porous carbon structure during high-temperature carbonization, and the porous carbon structure is formed. Finally, Fe3C and Fe monatomic synergistic coexistence hierarchical porous N-doped composite carbon-based catalyst is achieved, the obtained catalyst can efficiently activate peracetic acid and degrade phenol organic pollutants, and the catalyst is simple in preparation process, good in catalytic effect and high in stability and has wide application potential.

The invention discloses a modified PVC (polyvinyl chloride) particle and a preparation method thereof in the field of high polymer material modification, the modified PVC particle takes PVC resin as a matrix, and two brand new modifiers, namely a silicon-boron-nitrogen hybrid epoxy nanosphere and epoxidized soybean oil-maleic anhydride-2-ethylhexyl acrylate random copolymer, and other auxiliaries are added. The silicon-boron-nitrogen hybrid epoxy nanospheres are prepared by the following steps: hydrolyzing tetraethoxysilane and triethyl borate in absolute ethyl alcohol to generate a silicon-boron alcohol intermediate, then carrying out sol-gel reaction on the silicon-boron alcohol intermediate and glycidyl methacrylate to form a hybrid network containing an epoxy group, and finally carrying out ultrasonic dispersion. The epoxidized soybean oil-maleic anhydride-2-ethylhexyl acrylate random copolymer is prepared by carrying out ring opening on epoxidized soybean oil and peracetic acid to generate epoxidized soybean oil acrylate, and then carrying out free radical copolymerization reaction on the epoxidized soybean oil acrylate, maleic anhydride and 2-ethylhexyl acrylate. The method is suitable for the fields of high-end building materials, automotive interiors and the like.

The invention discloses a preparation method of a metal organic framework catalyst and application of the metal organic framework catalyst in biomass furfural hydrogenation, and belongs to the technical field of catalytic hydrogenation. The preparation method of the metal organic framework catalyst comprises the following steps: S1, dissolving cobaltous acetate, L-glutamic acid and phosphomolybdic acid in distilled water to obtain a solution marked as a solution A; dissolving 1, 3, 5-benzenetricarboxylic acid (BTC) in ethanol to obtain a solution B, pouring the solution B into the solution A, stirring, and centrifuging to collect a precipitate; and S2, calcining the precipitate in an inert atmosphere to obtain the metal organic framework catalyst. The specific steps of applying the catalyst to the furfural hydrogenation reaction are as follows: adding the prepared catalyst and furfural into deionized water, performing heating and pressurizing reaction through a hydrogenation reaction kettle to obtain a solution, extracting the solution with ethyl acetate, and performing GC quantitative detection on the product after the extraction reaction. The method is mild in reaction condition, has an efficient furfural hydrogenation effect, and can completely convert FFA within 2 hours under the condition that 50 mg of catalyst is added.

The invention discloses a chlorine-free environment-friendly bleaching agent for refined cotton. Comprising the following raw materials in parts by weight: 5-18 parts of peracetic acid, 10-30 parts of hydrogen peroxide, 5-8 parts of a sodium alginate / PEG4000 / modified cellulose nanowhisker compound, 1-5 parts of an organic acid catalyst, 0.05-0.5 part of a dipicolinic acid stabilizer, 0.01-0.1 part of a magnesium salt stabilizer, 2-10 parts of a pH buffer solution and 40-60 parts of deionized water. According to the chlorine-free environment-friendly refined cotton bleaching agent disclosed by the invention, efficient bleaching under mild conditions is realized through precise matching of a composite oxidation system and a multi-element synergistic protection system; meanwhile, the invention provides a preparation method and an application process of the bleaching agent, the bleaching agent is adaptive to the existing production line, and enterprise upgrading cost is reduced.

A method for controlling microbial growth in a sugar processing system is disclosed, wherein the method comprises adding a peroxy acid into water of a flume system used for transporting a sugar-containing plant material from a delivery or storage location to a wash system. In one non-limiting example embodiment, the sugar-containing plant material comprises sugar beets, and the peroxy acid comprises peracetic acid.

Various formulations of a high-level disinfectant and liquid chemical sterilant are provided. The formulations include a peracetic acid solution which has achieved equilibrium and is catalyzed by an amount of sulfuric acid in the solution. The inclusion of sulfuric acid greatly reduces the amount of time to achieve equilibrium, and despite the inclusion of a mineral acid the resulting solution has enhanced reuse stability and equivalent toxicity, improved sterilization properties, and material compatibility to non-catalyzed peracetic acid solutions.

The invention discloses a method for enhancing compost humification synergistic gas emission reduction and tetracycline degradation through thermal activation peroxide, and relates to the technical field of compost. The method comprises the following steps: mixing livestock and poultry manure and 1-3cm crop straws according to a dry weight ratio of (1-3): 1, and adjusting the carbon-nitrogen ratio to (20-30): 1 to complete raw material pretreatment; when the temperature of the pile body is 25-35 DEG C, peroxide (hydrogen peroxide, peracetic acid or potassium persulfate) is sprayed and mixed uniformly in the form of an aqueous solution, the addition amount is 0.125-1.25% of the dry weight of the raw materials, the moisture content of the pile body is controlled to be 55-75%, and continuous or intermittent ventilation composting is carried out at the speed of 0.2-1.0 m < 3 > h <-1 >. According to the method, the peroxide is activated by utilizing self-produced heat of compost, external energy sources and chemical activators are not needed, triple effects of compost humification improvement, ammonia gas and greenhouse gas emission reduction and tetracycline degradation are realized, and the method is green, environment-friendly, low in cost and suitable for organic solid waste treatment.

The application discloses a sludge-based activated carbon loaded monatomic catalyst, a preparation method thereof and application thereof in activating peracetic acid to degrade organic pollutants in water. The catalyst comprises a nitrogen-doped sludge activated carbon porous carrier in a graphene appearance and Fe monatomic atoms loaded on the nitrogen-doped sludge activated carbon porous carrier, wherein the Fe monatomic atoms have 2Fe-N4 and Fe2N6 double coordination structures. The preparation method comprises the following steps: S1, after wastewater sludge is dried, crushed, sieved, mixed with a ZnCl2 solution, and then solid-liquid separation is performed to obtain the solid, the solid is dried, first pyrolysis is performed in an inert atmosphere, acid washing purification is performed, and water washing is performed, a sludge-based porous activated carbon is obtained; S2, the sludge-based porous activated carbon, melamine and Fe(NO3)3.9H2O are uniformly mixed in a solvent, and then dried to obtain a precursor solid; and S3, the precursor solid is subjected to second pyrolysis in an inert atmosphere, acid etching, water washing and drying.

The invention provides a synthetic method of 2-(2-amino-5-bromo-benzoyl) pyridine, and belongs to the technical field of medicine synthesis. A one-pot boiling method is adopted, 2-cyanopyridine and 4-bromaniline are used as raw materials, BCl3 is used as a catalyst, dichloromethane is used as a solvent, a heat preservation reaction is performed for 5-25 hours at the temperature of-10 DEG C to 40 DEG C, and the product 2-(2-amino-5-bromo-benzoyl) pyridine is obtained through ethyl acetate extraction, anhydrous sodium sulfate drying and dichloromethane and petroleum ether recrystallization. According to the preparation method of the 2-(2-amino-5-bromo-benzoyl) pyridine, provided by the invention, butyl lithium with extremely high dangerousness does not need to be used, the reaction steps are simple, the yield is stable, the treatment is easy, and the yield is high.

The application discloses a method for degrading organic matter by activating peracetic acid by using electrochemically generated atomic hydrogen, and degrading antibiotics, and can realize mineralization effect, improve degradation effect, improve degradation efficiency, and does not need other catalysts, thus avoiding other energy input, reducing cost, avoiding secondary pollution, realizing directional degradation effect, having strong anti-interference capability in degradation, and being good in use effect and beneficial to promotion.

The application discloses a preparation method of a deodorant product, and comprises the following steps: step one, preparing a cross-linked hydroxypropyl methyl cellulose and chitosan water solution: hydroxypropyl methyl cellulose and chitosan are dispersed in water in a mass ratio of 1:1 to form a uniform and stable water dispersion a; peracetic acid and a copper ion catalyst are added to the water solution a, and the water solution a is heated and treated at 80-100 DEG C for 3-5 hours to obtain a water solution b; glucose is added to the water solution b to remove excess peracetic acid, and the water solution b is heated and treated for 1 hour again; and the cross-linked hydroxypropyl methyl cellulose and chitosan water solution is obtained after cooling; step two, preparing a stable hydrogen peroxide solution: urea is added to a hydrogen peroxide solution, and the solution is stirred at 40-50 DEG C for 1 hour; cyclodextrin is added to the above solution, and the solution is continuously stirred at 40-50 DEG C for 1 hour; and the stable hydrogen peroxide solution is obtained after cooling to room temperature; and step three, preparing the deodorant product: the cross-linked hydroxypropyl methyl cellulose and chitosan water solution obtained in step one and the stable hydrogen peroxide solution obtained in step two are mixed in a ratio of 1:5 to 1:1, and sodium chlorite is added, so that the deodorant product is obtained after stirring.

The application discloses a method for removing trace sulfonamidochrysoidine in water by activating peracetic acid through complexation of manganese sulfate and 2-picolinic acid, wherein, (1) a homogeneous Mn(II)-PICA complex solution is prepared by mixing and stirring a manganese sulfate solution and a 2-picolinic acid solution; (2) peracetic acid solution and the homogeneous Mn(II)-PICA complex solution are added into water containing sulfonamidochrysoidine, and the mixture is fully stirred, and in the reaction process, high-valence manganese active species Mn(V)=O is generated; the system mainly adopts a non-radical oxidation path, has high selectivity to sulfonamidochrysoidine, and realizes degradation of the sulfonamidochrysoidine. The method has high activation efficiency and fast degradation speed, and the complex system significantly improves the activation efficiency of PAA, and the removal rate of sulfonamidochrysoidine can reach more than 90 % within 10 min, which is much higher than that of a single activation system.

This application discloses a cobalt-supported peanut shell biochar / peracetic acid synergistic system for water treatment and its application. The synergistic system includes cobalt-supported peanut shell biochar, peracetic acid, and water. The cobalt-supported peanut shell biochar comprises a peanut shell biochar matrix and cobalt-containing substances supported on the matrix. The cobalt-containing substances include metallic cobalt and / or cobalt oxides. The mass ratio of cobalt-supported peanut shell biochar to peracetic acid is (2-132):1. The atomic ratio of cobalt to carbon in the matrix is ​​(0.2-0.3):1. The cobalt-supported peanut shell biochar has a mesoporous structure with a total pore volume of not less than 0.07 cm³ / g and a specific surface area of ​​not less than 100 m². 2 / g. When this synergistic system is used to treat water containing organic pollutants, especially sulfamethoxazole, it can achieve a removal rate of over 90% within 3-5 minutes. The system maintains high activity and good stability over a wide pH range and in the presence of common anions, exhibiting excellent continuous operation performance. The degradation pathway of this synergistic system is environmentally friendly and can effectively reduce the toxicity of the products.

The invention discloses a preparation method of a medical radiopharmaceutical aseptic packaging material, which comprises the following steps: firstly, blending graphene enhanced PET (Polyethylene Terephthalate) and radiation crosslinked polyethylene through a melt extrusion process to form a three-layer composite structure with antibacterial property, mechanical support property and high barrier property; secondly, forming by adopting a laser heat sealing technology, embedding a photochromic microbial indicator, and simultaneously integrating a PTFE (Polytetrafluoroethylene) membrane filter layer and an iodine adsorption pad; then, electron beam irradiation is used for body sterilization, and ultrasonic atomization peracetic acid is used for disinfection; finally, a PVDF-HFP / zinc oxide composite nanofiber membrane is prepared through an electrostatic spinning technology, a PLA buffer layer is sleeved, a temperature-sensitive radiation protection material is pre-buried, and seamless sealing is completed; experimental results show that the novel packaging material not only has excellent antibacterial performance, mechanical strength and chemical stability, but also can effectively improve the shielding efficiency on beta / gamma rays, and ensures the safety and stability of radiopharmaceuticals in the storage and transportation processes.

The application provides a Mo and K co-doped MnO2 catalyst, which is obtained by doping Mo and K in alpha-MnO2 nanowires, and Mo and K are uniformly distributed on the surface and tunnel structure of the alpha-MnO2 nanowires, and the catalyst has a hydroxyl functional group. The application also provides a preparation method of the catalyst, and a method for degrading pollutants by activating peracetic acid with the catalyst, wherein peracetic acid and the catalyst are added into wastewater containing organic pollutants under stirring, and the pH value of the wastewater is controlled to be 5-9; in the wastewater treatment process, the catalyst activates the peracetic acid to generate organic free radicals and singlet oxygen to degrade the organic pollutants in the wastewater. The application can improve the ability of the MnO2-based catalyst to activate peracetic acid to generate active species to degrade organic pollutants, and solves the problems that the existing MnO2-based catalyst has low ability to activate peracetic acid and poor degradation ability for organic pollutants.

The invention belongs to the technical field of sewage treatment, and particularly relates to a method for degrading cyanide-containing wastewater. When the cyanogen-containing wastewater is cyanogen-containing complex wastewater, the method for degrading the cyanogen-containing wastewater comprises the following steps: sequentially carrying out photolysis reaction and first oxidation reaction on the cyanogen-containing wastewater under the condition that the pH value is 9.5-13.0; when the cyanide-containing wastewater is free cyanide-containing wastewater, the method for degrading the cyanide-containing wastewater comprises the following steps: sequentially carrying out a second oxidation reaction on the cyanide-containing wastewater under the condition that the pH value is 9.5-13.0; oxidizing agents for the first oxidation reaction and the second oxidation reaction are solutions of peracetic acid; the second oxidation reaction is carried out under the condition of ultraviolet irradiation. The method provided by the invention can destroy stable coordinate bonds (Fe-CN) of ferricyanide, improves the degradation efficiency, and does not generate secondary pollution.

The invention provides a preparation method of iodobenzene diacetate, and belongs to the technical field of preparation of drug intermediates. According to the method, 50wt% hydrogen peroxide reacts with acetic anhydride to obtain a peracetic acid system, separation and purification are not needed, the peracetic acid system directly reacts with iodobenzene, and iodobenzene diacetate is prepared. The method has the advantages of simple and easy process, mild conditions, low production cost and less wastewater discharge, and is suitable for industrial production.

When the COP processing and the SOP processing in the chamber of the aseptic filling machine are performed, the cleaning solution or the sterile water remaining in the chamber before the sterilizing agent containing peracetic acid or hydrogen peroxide is sprayed is promptly removed. The conveying device that conveys the container in the chamber of the aseptic filling machine is driven to remove the cleaning solution after the COP processing or the sterile water during the SOP processing.

1. Name of the design product: biological reader (new type of express). 2. Use of the design product: for fast and effective monitoring of the processes of pressure steam sterilization, hydrogen peroxide low-temperature plasma sterilization, ethylene oxide sterilization, low-temperature steam formaldehyde sterilization, peracetic acid sterilization, etc. performed in medical equipment, in combination with the corresponding express biological indicator. 3. Design points of the design product: in shape. 4. Picture or photo best indicating the design points: perspective view.

The present application belongs to the technical field of metal fuel, and particularly relates to a surface modification method of metal, a modified metal obtained by the method and application of the modified metal. The modification method provided by the present application comprises hydrophilic modification and oleophilic modification. The hydrophilic modification is performed by modifying the metal with cerium hydroxide, so as to improve the dispersibility of the metal in water. The oleophilic modification is performed by modifying the surface of the metal with cerium acetate, so as to improve the dispersibility of the metal in an organic solvent. The improvement of the dispersibility promotes the combustion effect of the metal.

A multi-barrier coupled treatment process for organic complexed heavy metals in wastewater from battery cathode material production is disclosed, relating to the field of wastewater treatment. The method involves: 1. Adjusting the pH of the wastewater to 3.0-4.5; 2. Adding iron salt and peracetic acid to an oxidation reaction tank; 3. Achieving primary removal of heavy metals through neutralization and precipitation after oxidation; 4. Adjusting the pH of the wastewater back to 6.0-6.5; 5. Passing the wastewater sequentially through a primary adsorption unit and a secondary adsorption unit. This invention utilizes the low bond energy characteristics of PAA and the synergistic oxidation advantages of multiple free radicals to solve the bottleneck problems of incomplete complex breaking, large sludge production, and narrow pH application range in traditional methods. After treatment by this invention, the total nickel concentration in the effluent is less than 0.05 mg / L, and the total cobalt concentration is less than 0.02 mg / L, consistently exceeding the limits of the "Emission Standard of Pollutants for Battery Industry" (GB 30484-2013), demonstrating broad industrial application prospects.

The invention belongs to the technical field of device cleaning, and particularly relates to a cleaning method of a gold terminal multilayer ceramic capacitor. According to the invention, through mixed cleaning of acetic acid and ethanol, inorganic and organic pollutants on the surface of the gold terminal multilayer ceramic capacitor can be effectively cleaned. The acetic acid can chemically react with part of alkaline impurities, metal oxides and part of organic dirt on the surface of a gold layer of the gold-terminal multilayer ceramic capacitor to convert the alkaline impurities, the metal oxides and the organic dirt into water-soluble or easy-to-clean substances; ethanol has good solubility and volatility, and has a good cleaning effect on organic pollutants such as oil stains and organic impurities on the surface of the multilayer ceramic capacitor; according to the method, ultrasonic waves are used in a combined mode, strong impact force and microjet are generated through the cavitation effect of the ultrasonic waves in liquid, inorganic and organic pollutants on the surface of the multi-layer ceramic capacitor are stripped and removed, micro-pollutants can be effectively removed through multi-stage rinsing, and the service life of the multi-layer ceramic capacitor is prolonged. Therefore, the purpose of cleaning the gold layer surface of the gold terminal multilayer ceramic capacitor is achieved.

Disclosed herein is a method for preparation of a disinfectant formulation, the method comprising steps of obtaining a chlorine dioxide (CIO2) solution by adding a predetermined quantity of sodium chlorite with a predetermined quantity of sodium bisulfate in a first container filled with water, keeping the first container closed for a predetermined period of time, dissolving a predetermined quantity of peracetic acid (PAA) in water in a second container, adding a predetermined quantity of benzalkonium chloride (BAC) to the solution in the second container, and mixing and stirring the solutions of the first and second container to obtain a disinfectant solution.

This invention discloses a method and apparatus for recycling amine-cured epoxy resin carbon fiber reinforced composite materials. The method utilizes an organic solvent to pretreat the composite material sample through solvent swelling, followed by the use of an in-situ peracetic acid generation system to degrade the epoxy resin matrix, thereby achieving complete recycling of the carbon fibers. The recycling method of this invention operates at a reaction temperature not exceeding 160°C and under normal pressure throughout the entire recycling process, effectively avoiding surface damage and mechanical property impairment to the fibers caused by high-temperature pyrolysis (typically above 500°C) or high-pressure reactions (e.g., supercritical hydrolysis). The carbon fibers recovered using this method retain over 90% of the original fiber tensile strength, exhibiting extremely high reuse value.

The invention discloses a method for preparing peracetic acid based on a heterogeneous catalyst. The method comprises the following steps: acetic acid and hydrogen peroxide react for a certain time under the catalysis of a heterogeneous catalyst to obtain peroxyacetic acid, wherein the heterogeneous catalyst is MoO3 / WO3-loaded three-dimensional mesoporous silica. Compared with a traditional acetic acid method adopting concentrated sulfuric acid as a catalyst, the heterogeneous catalyst is small in corrosion to equipment, easy to separate and capable of being recycled, and the product does not contain sulfuric acid and is high in purity.

In this space decontamination method, a solution containing hydrogen peroxide at a concentration of 1-6 w / v% and acetic acid at a concentration of 1-10 w / v% and not containing peracetic acid is sprayed into a space. This space decontamination apparatus includes a spray unit configured to spray a solution into a space, the solution containing hydrogen peroxide at a concentration of 1-6 w / v% and acetic acid at a concentration of 1-10 w / v% and not containing peracetic acid.

The invention discloses a method for removing microcystis aeruginosa, which comprises the following steps: (1) adding peracetic acid into a microcystis aeruginosa water body, so that the concentration of the peracetic acid in the water body is 0.1-5.0 mmol / L; and (2) carrying out electrolytic reaction on the water body in the step (1) by adopting an electrochemical oxidation device, activating peracetic acid in the water body, and enabling generated free radicals to act on microcystis aeruginosa cells so as to remove the microcystis aeruginosa. According to the method, pseudomonas aeruginosa can be rapidly removed, the degradation rate within 30 minutes exceeds 90%, microcystin-LR is eliminated, and the biotoxicity is remarkably reduced.