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233results about How to "High catalytic efficiency" patented technology

Method for preparing Fenton-like reaction catalyst and application thereof

The invention provides a method for preparing Fenton-like reaction catalyst. Inert oxide or a molecular sieve is used as a carrier, and the carrier is loaded with nano-scale iron oxide. The method includes mixing the iron oxide and the carrier with each other and then molding the iron oxide and the carrier to obtain particles; calcining the particles at the temperature of 200-500 DEG C to obtain the Fenton-like reaction catalyst with the particle size of 10-40 mesh. A weight proportion of the iron oxide to the carrier is 1:(0.4-1). The method has the advantages that the Fenton-like reaction catalyst prepared by the aid of the method is high in catalytic activity, selectivity and stability and can be used as Fenton-like oxidation reaction catalyst for advanced treatment of wastewater after the wastewater is subjected to biochemical treatment, accordingly, the catalytic efficiency can be improved in reaction procedures, float mud can be prevented, the COD (chemical oxygen demand) removal rate of the treated wastewater can be obviously increased as compared with existing Fenton treatment, and wastewater treatment discharge requirements can be met; the pH of treated outflow ranges from 7.0 to 8.0, and the treated outflow can be directly discharged without pH regulation; waste mud generated in treatment procedures can be utilized and can be used for producing coatings.
Owner:河北协同水处理技术有限公司 +1

Surface modified nano ferroferric oxide Fenton catalyst and preparation method thereof

The invention discloses a surface modified nano ferroferric oxide Fenton catalyst and a preparation method thereof. The preparation method of the surface modified nano ferroferric oxide Fenton catalyst comprises the following steps: firstly preparing high dispersibility nano ferroferric oxide by adopting a coprecipitation method, and then carrying out surface modification on the nano ferroferric oxide by adopting a hydrolysis method. Organic acid salt and a non-ionic surface active agent are added when the coprecipitation method is adopted for preparing ferroferric oxide particles, so that the quantity of inorganic matters deposited on the surfaces of the ferroferric oxide particles is low, enrichment of reaction substrate and charge transfer on the surfaces of the ferroferric oxide particles can be enhanced, good catalytic efficiency can be realized at room temperature in a larger pH range, and the surface modified nano ferroferric oxide Fenton catalyst can be used for advanced oxidation treatment of dye sewage, organic pollutant sewage, pesticide sewage and the like. Therefore, the preparation method of the surface modified nano ferroferric oxide Fenton catalyst has the characteristics of simplicity in operation, mild conditions, adaptability to large-scale preparation and the like, cost for obtaining the product is low, and the obtained product can be widely and more easily popularized.
Owner:SOUTHWEST UNIVERSITY FOR NATIONALITIES

Advanced treatment method of integrated catalytic ozonation-biological aerated filter water

The invention discloses a method for treating water by an integrated catalytic ozonation-biological aerated filter device. The method comprises the steps of mixing water from a water inlet water pump with ozone which comes from an ozone generation system and contains oxygen in a main pipeline of waste water, entering the mixture evenly into a catalytic ozonation zone through a filter plate which is arranged at the bottom of a catalytic ozonation reaction zone, wherein the upper end of a catalytic ozonating agent ceramsite is filled with a common biological ceramsite, wherein the filling height of the catalytic ozonating agent ranges 0.3n to 1m; and thoroughly oxidizing and decomposing the waste water and the ozone under the catalytic action of the catalytic ozonating agent ceramsite in the catalytic ozonation zone and then flowing up to the upper biological aerated filter. According to the invention, nonbiodegradable organic matters in water are destructed and treated through catalytic ozonation pretreatment and then converted into biodegradable organic matters, and further biochemically treated by using the biological aerated filter; as a result, the advantages of the biological aerated filter are brought into play thoroughly and the waste water containing the biodegradable organic matters are effectively treated.
Owner:SOUTH CHINA UNIV OF TECH

Preparation method of aniline through catalytic nitrobenzene hydrogenation

The invention discloses a preparation method of aniline through catalytic nitrobenzene hydrogenation. According to the preparation method, nitrobenzene is taken as the reactant, hydrogen gas is taken as the hydrogen source, a precious metal supported nitrogen-functionalized carbon material is taken as the catalyst, water is taken as the solvent, reactions are carried out for 0.5 to 5 hours at a temperature of 30 to 80 DEG C, after reactions, the reaction product is filtered; and then the reaction liquid is extracted by anhydrous ethanol to obtain aniline. No organic solvent or additive is used during the reaction process. After the reactions, the catalyst and the reaction product can be separated just through simple filtering. The catalyst can be repeatedly used, while the catalytic activity is basically not changed. The yield of aniline can reach 90% or more. The preparation process of catalyst is simple, the cost is low, the repeatability is good, and the catalyst system is high efficient, green, and environment-friendly. The reaction conditions are mild, the operation is simple, no additive is used, the catalysis process is environment-friendly, and thus the method has a very good industrial application prospect.
Owner:湖北进创博生物科技有限公司

Preparation method of titanium oxide (TiO2) - silicon dioxide (SiO2) visible light compound light catalytic agent

The invention discloses a preparation method of titanium oxide (TiO2) - silicon dioxide (SiO2) visible light compound light catalytic agent. The prepared TiO2-SiO2 visible light compound light catalytic agent by the preparation method has visible light wave band light response and excellent catalyst degrade effect to organic matters. The preparation method of the TiO2-SiO2 visible light compound light catalytic agent comprises the following steps: 1, respectively dissolving tetrabutyl orthotitanate (TBOT) and tetraethyl orthosilicate (TEOS) with a certain volume ratio, then adding ammonium acetate and C microsphere to anhydrous ethanol according to a certain adding amount, and eventually obtaining black suspension liquid; 2, transferring the black suspension liquid to a high-pressure reaction kettle to conduct hydrothermal reaction, and lastly, obtaining the TiO2-SiO2 visible light compound light catalytic agent after calcining solid products in reaction liquid. The preparation method of the TiO2-SiO2 visible light compound light catalytic agent is simple in steps, mild in reaction condition, low in cost, high in reproducibility, easy to scale-up, high in purity, production and rates of production of the prepared products, and large in specific surface area. The preparation method of the TiO2-SiO2 visible light compound light catalytic agent has response in visible light wave band and is high in catalytic efficiency.
Owner:ZHONGBEI UNIV

Multi-enzyme system with immobilized polyethylenimine and metal coordination and method for preparing multi-enzyme system

The invention discloses a multi-enzyme system with immobilized polyethylenimine and metal coordination and a method for preparing the multi-enzyme system, and belongs to the technical field of immobilized enzymes. The method includes immobilizing glycerol dehydrogenase, coenzyme oxidase and glycerol dehydrogenase-coenzyme oxidase fusion enzymes by the aid of coordination of polyethylenimine and metal ions; forming netted polyethylenimine frameworks by polyethylenimine molecules under coordination effects of imine and the metal ions in immobilizing procedures; forming coordination bonds by the metal ions coordinated on the polyethylenimine, C-end histidine tags of the glycerol dehydrogenase and the coenzyme oxidase and C-end histidine tags of the glycerol dehydrogenase-coenzyme oxidase fusion enzymes so as to acquire the immobilized multi-enzyme system. Coordination crosslinking effects can be realized by the metal ions in the immobilizing procedures, and the catalysis efficiency of the multi-enzyme system can be improved. The multi-enzyme system and the method have the advantages that the multi-enzyme system is high in multi-enzyme coupling efficiency, preparation conditions are mild, and processes are simple and feasible; the immobilized enzymes are high in immobilizing rate and activity recovery rate and good in reuse stability, the temperature stability can be obviously improved, and the like.
Owner:XIAMEN UNIV

Preparation method for carrollite spinel and application thereof

The invention provides a preparation method for carrollite spinel and an application thereof and relates to the preparation and application of carrollite spinel. The preparation method comprises the following steps: dissolving cobalt ion salt and cupric ion salt in ultrapure water and adding thiourea; dissolving and then adding excessive quadrol, and performing hydrothermal reaction, thereby acquiring a solid product; cleaning and drying the solid product. The application is as follows: free sulfate radicals generated by activation of persulfate under the effect of carrollite spinel are utilized to degrade organic pollutants in water, under the condition of taking the carrollite spinel as a catalyst and monopersulfate as an oxidizing agent. According to the invention, transition metals copper and cobalt on the surface of carrollite spinel are capable of catalyzing monopersulfate to decompose and generate free sulfate radicals with strong oxidizing property in the manner of changing valence state, and the free sulfate radicals react with organic pollutants so as to decompose and even mineralize the organic pollutants. The carrollite spinel prepared according to the invention has a stable structure, is high in catalyzing efficiency and is reusable. The invention is suitable for preparing carrollite spinel and catalyzing monopersulfate to degrade organic pollutants in water.
Owner:HARBIN INST OF TECH
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