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

The invention discloses a polyamide amino-functionalized magnetic polymer microsphere adsorbent. The polyamide amino-functionalized magnetic polymer microsphere adsorbent is characterized in that a structural formula is as follows: PAMAMG3-Fe3O4 / (GMA-AA-EGDMA); the polyamide amino-functionalized magnetic polymer microsphere adsorbent is prepared from the following raw materials: epoxy magnetic polymer microsphere Fe3O4 / P(GMA-AA-EGDMA), ethylenediamine and methyl acrylate. A method for preparing and treating the uranium-containing wastewater comprises the following steps: (1) preparing magnetic polymer microspheres containing epoxy groups; (2) synthesizing the polyamide amino-functionalized magnetic polymer microsphere adsorbent; (3) performing an adsorption test to uranium in the uranium-containing wastewater through the magnetic polymer microsphere adsorbent. According to the polyamide amino-functionalized magnetic polymer microsphere adsorbent disclosed by the invention, the preparation route is simple and short, the operation is easy, the adsorbent has the advantages of strong adsorption capability, high adsorption capacity and quick adsorption speed, and is easily separated from an aqueous solution, can be repeatedly used and is capable of effectively adsorbing and recycling uranium ions in the aqueous solution when being used for treating the uranium-containing wastewater.

The invention provides visible-light responding type magnetic compound photocatalyst carbon microspheres-zinc ferrite and silver phosphate (CMSs-ZnFe2O4 and Ag3PO4) with core-shell structures and a preparation method and application of the visible-light responding type magnetic compound photocatalyst carbon microspheres. The CMSs are used as cores, zinc ferrite and silver phosphate are sequentially loaded on the surface of the CMS by a solvothermal method and an in-situ precipitation method, therefore, the compound photocatalyst carbon microspheres-zinc ferrite and silver phosphate with the double core-shell structures is prepared. Compared with pure Ag3PO4, the prepared compound photocatalyst has the advantages of high visible light absorption strength, good magnetic separation property, strong photo corrosion resistance and the like, is applied to treatment of 2,4-dichlorophen non-biodegradable organic wastewater, has high removal rate of 96.56% for 20mg / L of 2,4-dichlorophen solution within 150min, and still has the removal rate up to 86.21% for the 2,4-dichlorophen solution after used repeatedly for four times.

The invention discloses a method for chelating and functionalizing magnetic polyvinyl alcohol microspheres and application of the method. The method comprises the following steps: firstly carrying out chlorination on the magnetic polyvinyl alcohol microspheres to enable hydroxyl terminals of the polyvinyl alcohol microspheres to be connected with chlorine groups, then replacing the chlorine groups by using amino groups, then carrying out carboxylation to form final chelating groups and enable the final chelating groups to have the capability of chelating heavy metal so as to obtain the magnetic polyvinyl alcohol microspheres with the absorbing and chelating functions. The method provided by the invention has the advantages that the preparation condition is mild, the cost is low, the obtained chelated and functionalized magnetic polyvinyl alcohol microspheres can be used for treating heavy-metal ions in waste water, the absorbing capacity is large, the separation of the heavy-metal ions from water can be quick and the recovery utilization rate is high.

The invention discloses a preparation method for a composite magnetic chitosan adsorption material. The preparation method comprises the steps that magnetic chitosan is dispersed in deionized water, diethylenetriamine is added, uniform shaking is carried out, then activated nitrilotriacetic acid is added, uniform mixing is carried out, then the mixture is put into a high-temperature condition forreaction, then washing is carried out with deionized water, and drying is carried out so as to obtain the composite magnetic chitosan adsorption material, wherein the mass volume ratio of the magneticchitosan to a diethylenetriamine solution is 1 g:10-120 mL, and the mass ratio of the magnetic chitosan to nitrilotriacetic acid is 1:0.1-5. The adsorption material prepared through the method has the advantages of being excellent in adsorption capacity, high in stability and easy to separate and recycle; and in addition, the method has the advantages of being simple and easy to operate, low in instrument and equipment requirement and short in preparation period. The invention also provides application of the composite magnetic chitosan adsorption material in removal of tetracycline antibiotics in water. According to the application of the composite magnetic chitosan adsorption material, the tetracycline antibiotics include but are not limited to tetracycline, chlortetracycline, oxytetracycline and doxycycline.

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 preparation method and an application of a magnetic bimetallic catalyst for preparing alanine through lactic acid amination. The obtained magnetic bimetal M-Ni@C is used as acatalyst, ammonia water is used as a solvent, efficient conversion of alanine can be realized by carrying out reductive amination reaction under the action of H2, byproducts are few, the catalyst iseasy to separate and recover and is suitable for industrial production, and the problems of single reaction catalytic system, difficulty in catalyst separation and poor cyclic utilization in the priorart are solved.

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 invention provides visible-light responding type magnetic compound photocatalyst carbon microspheres-zinc ferrite and silver phosphate (CMSs-ZnFe2O4 and Ag3PO4) with core-shell structures and a preparation method and application of the visible-light responding type magnetic compound photocatalyst carbon microspheres. The CMSs are used as cores, zinc ferrite and silver phosphate are sequentially loaded on the surface of the CMS by a solvothermal method and an in-situ precipitation method, therefore, the compound photocatalyst carbon microspheres-zinc ferrite and silver phosphate with the double core-shell structures is prepared. Compared with pure Ag3PO4, the prepared compound photocatalyst has the advantages of high visible light absorption strength, good magnetic separation property, strong photo corrosion resistance and the like, is applied to treatment of 2,4-dichlorophen non-biodegradable organic wastewater, has high removal rate of 96.56% for 20mg / L of 2,4-dichlorophen solution within 150min, and still has the removal rate up to 86.21% for the 2,4-dichlorophen solution after used repeatedly for four times.

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.

Belonging to the technical field of VOC waste gas treatment, the invention particularly relates to a soybean oil absorption liquid for VOC waste gas treatment, an absorption method and a separation and recovery method. The soybean oil absorption liquid comprises, by mass, 10-50% of soybean oil, 40-80% of white oil and 4-10% of calcium chloride. The absorption method includes: introducing air containing VOC waste gas into the soybean oil absorption liquid, conducting stirring continuously, and then carrying out ultrasonic oscillation. According to the separation and recovery method, the soybeanoil absorption liquid absorbing VOC waste gas for 24h or more is subjected to reduced pressure condensation. The soybean oil absorption liquid provided by the invention has the characteristics of lowviscosity, good absorption effect, strong practicability, low cost, easy separation and recovery, recyclability, noninflammability, simple operation and safe use, and is suitable for large-scale application to VOC waste gas treatment.

The invention relates to a preparation method of 8-methoxy-2-tetralone. According to the method, 8-methoxy-2-tetralone is synthesized through a hydrolysis reaction, a reduction reaction and the like with 2-methoxybenzonitrile serving as the starting material. The method has the advantages that the raw material 2-methoxybenzonitrile is cheap and easy to obtain; reaction conditions of the technology are mild, reaction time of the technology is short, the yield is high, operation is easy and convenient, and industrial production can be easily achieved; use of expensive catalysts like rhodium is avoided in the technology, and production cost is low; adopted novel magnetic-nanoparticle-loaded lewis acid has good paramagnetism and can be rapidly separated from a reaction system and recovered just by adopting a simple applied magnetic field in separation and recovery, the process is simple, the quantity of the three wastes is small, and production cost is low.

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.