42results about How to "Rapid separation and recovery" patented technology

The invention discloses a method for preparing an algae base magnetic activated carbon material and the application of the algae base magnetic activated carbon material. According to the method, the preparing process and the magnetizing process of the activated carbon material are synchronized, a one-pot mode is adopted, drying, smashing, sieving and other preprocessing and activating processes are not needed, the steps of washing, drying and activator removing and the like are not needed after carbonization, a ferric salt solution is directly carbonized into ferroferric oxide nanometer particles in the preparing process, the ferroferric oxide nanometer particles are loaded to the surface of the activated carbon material, the operation is simple and easy to carry out, the preparing period is short, cost is low, mass production can be achieved, and due to the fact that the environmental pollutant of blue algae is utilized in the preparing process, dual environment benefits are achieved. The prepared algae base magnetic activated carbon material has large specific surface area and porosity, can efficiently adsorb methylene blue or methylene blue or bisphenol A in wastewater, has superparamagnetism and can be quickly separated from a liquid phase system after adsorption, and recycling is facilitated.

The invention discloses a polyamidoamine functionalized magnetic polymer microsphere adsorbent, which is characterized in that its structural formula is: PAMAMG3-Fe3O4 / (GMA-AA-EGDMA), which is prepared from the following raw materials: epoxy Based magnetic polymer microspheres Fe3O4 / P (GMA‑AA‑EGDMA), ethylenediamine, methyl acrylate. The specific steps are: (1) Preparation of magnetic polymer microspheres containing epoxy groups; (2) Synthesis of polyamidoamine functionalized magnetic polymer microsphere adsorbent; (3) Magnetic polymer microsphere adsorbent Adsorption test for uranium in uranium-containing wastewater. The preparation route of the present invention is simple and easy to operate; it has the advantages of strong adsorption capacity, large adsorption capacity and fast adsorption speed when treating uranium-containing wastewater, and is easy to separate from aqueous solution, can be reused, and can effectively absorb and recover uranium in aqueous solution ion.

The invention relates to a binary amorphous-state alloy porous microspherical type efficient catalyst used for hydrogen release through catalytic alcoholysis of a hydrogen storage material ammonia borane and a preparation method for the binary amorphous-state alloy porous microspherical type efficient catalyst. A chemical formula of the catalyst can be abbreviated as CoxB(1-x), wherein a molar ratio of Co to B is x to (1-x), and x ranges from 0.15 to 0.85. The catalyst has an unformed amorphous-state phase structure, has an uniformly dispersed microspheric appearance, has a microsphere size ranging from 200 nm to 300 nm, is distributed with micropores in surface, and has a specific surface area ranging from 45 m<2>.g<-1> to 60 m<2>.g<-1>; a liquid-phase chemical process is adopted, the process is relatively simple and convenient, a high-temperature high-pressure reaction and treatment process is involved, time is relatively short, control is easy, and environmental pollution is avoided in a preparation process; and through liquid-phase chemical technological treatment, a Co-B amorphous-state alloy product still keeps certain magnetic characteristics, and therefore, the catalyst is quickly separated and recycled, regenerated and reused conveniently, and operation cost in a catalytic reaction process is favorably reduced.

The present application discloses a magnetic iron-based polyatomic coupling self-assembled two-dimensional nanosheet catalyst and its preparation method and application. In water, fully mix with the previously prepared citric acid aqueous solution to form a polynuclear metal atom citrate complex, adjust the pH of the solution to 6.8~7.5 by dropping ammonia water under rapid stirring, and add a certain amount of ethylene glycol, through the sol‑ The colloid is obtained by the gel method, which is then ground into a powder, and calcined in a muffle furnace to obtain a magnetic self-assembled two-dimensional sheet-like nanomaterial, which is an iron-based catalyst that couples various metal atoms. The catalyst of the present invention can effectively degrade organic pollutants through photocatalysis under visible light, realize efficient utilization of sunlight, take into account energy saving and environmental purification functions at the same time, and is expected to accelerate the separation of nanomaterials and avoid secondary environmental pollution by combining magnetic separation technology , Reduce post-processing costs.

The invention discloses a surface molecularly imprinted composite material as well as a preparation method and application thereof. The surface molecularly imprinted composite material is prepared by using bisphenol A as a template molecule, beta-cyclodextrin-modified magnetic chitosan as an imprinting vector and methacrylic acid as a functional monomer, forming a polymer through a polymerization reaction and then eluting the template molecule in the polymer. The surface molecularly imprinted composite material provided by the invention has the advantages of good adsorption effect, good stability, high capability of resisting water-molecule interference and a severe environment, high selectivity on the target pollutant bisphenol A, and the like, can be used for removing the bisphenol A in a water body, has the advantages of short treatment period, high selectivity, good stability, high capability of resisting the severe environment, capability of being quickly recycled, no harm to an environment, and the like, and has wide application prospects in the fields of environmental pollution treatment and environmental restoration.

The invention belongs to the field of environmental science and engineering, discloses an aluminum-based MOFs / chitosan composite microsphere and its preparation method and application, and solves the problem of reduced adsorption capacity of the existing MOFs after molding. The present invention uses the aluminum-based MOFs material MIL‑68 (Al) as a matrix, and obtains composite microspheres coated with chitosan on the surface under the joint crosslinking action of sodium alginate and chitosan. The particle size of the microspheres is about 2mm. Easy to separate and recover from water. Moreover, the present invention has a simple operation process, low requirements on equipment conditions, and is easy to implement. The aluminum-based MOFs / chitosan composite microspheres can achieve a removal efficiency equivalent to that of powdered MOFs, and can efficiently adsorb and remove bisphenol A in water bodies and will Materials are quickly separated and recovered from water bodies.

The invention relates to a magnetic nano-particle supported palladium catalyst and a preparation method thereof. The catalyst carrier selects silica gel-wrapped ferriferrous oxide magnetic nanoparticles with core shell structure, and has a high specific surface area, and excellent dispersibility and mechanical properties. The catalyst has superparamagnetism at room temperature, and is easy to be magnetized under applied magnetic field action, and magnetism is disappeared when the magnetic field is removed, so it is easy to implement purposes of rapid separation recovery and cycling usage of the palladium catalyst. The surface of the nano carrier covalently grafts a schiff base ligand by 'click chemistry' strategy to firmly and effectively support an organic ligand, and an intermediately longer carbon chain makes the schiff base ligand far from constraint of the carrier, and makes the schiff base ligand to be better coordinated with metal, thereby reaching homogeneous catalysis effect. The catalyst is suitable for Suzuki reaction of halogeno-benzene and aryl boric acid. Under mild reaction conditions, high yield can be obtained, and the catalyst can be repeatedly used almost without activity change.