239results about How to "High adsorption capacity" patented technology

The invention relates to a green preparation method of a magnetic molecular imprinting sorbent. The method is as below: preparing Fe3O4 nanoparticles by a room temperature ultrasonic-assisted coprecipitation method; conducting vinyl functionalization modification on the surfaces of the nanoparticles by using 3-(methacryloyloxy) propyl trimethoxy silane; and preparing the magnetic molecular imprinting sorbent in a methanol / water mixture system at room temperature through atomic transfer free radical precipitation polymerization by using sulfamethazine as a template molecule, hydroxyethyl methacrylate and 4-vinyl pyridine as functional monomers, ethylene glycol dimethacrylate and N, N'- methylene bisacrylamide as crosslinking agents, and cuprous bromide, N, N, N', N', N''- pentamethyldiethylenetriamine and 2-bromine ethyl isobutyrate as an initiator system. Static adsorption experiment results show that the magnetic molecular imprinting sorbent prepared by the invention has high adsorption capacity, rapid dynamic properties, specific molecular recognition properties and rapid magnetic separation capacity.

A bioadsorbent for treating the sewage containing heavy metal ions (5-2000 ppm) and with 2-11 of pH value is prepared by coating method and blotting method to coat the surface of mycelia (citrobacteria, yeast, etc) with the glucosan, chitosan, or chitosan derivative. Its advantages are low cost, high adsorption capacity (30-100 mg/g) and cyclic use (20 times).

The invention relates to a preparation process of a metal-organic framework porous adsorption material for C4-C8 normal paraffin and isoparaffin adsorption separation. According to the preparation method of the synthesized metal-organic framework porous adsorption material, metal ion nitrate and an organic ligand are dissolved according to the mass ratio of 1:1-15 in a mixed solution of N,N-dimethylformamide and N,N-diethyl formamide; stirring is carried out for 0.5-12 h; reaction temperature is controlled to 80-250 DEG C, and reaction time is 12-120 h; and by a hydrothermal synthesis method, the metal-organic framework porous adsorption material is prepared. The material has characteristics as follows: specific surface area is large; pore structure height is ordered; pore size is controllable; surface potential energy is controllable; and adsorption capacity of normal paraffin is large. The material can selectively adsorb normal paraffin from mixed materials of normal paraffin and isoparaffin, has high selectivity and has a wide practical application prospect in normal paraffin and isoparaffin separation.

A high-performance 5A molecular sieve with pressure-variable adsorption function is prepared through proportionally mixing the raw powder of 4A molecular sieve with kaolinite-type clay, adding plant fibres, granulating, sieving, baking, calcining at 200-1000 deg.C, immersing in the solution of sodium hydroxide, washing, Ca ion exchanging in CaCl2 solution, washing, baking, and calcining at 100-800 deg.C. Its advantages are high adsorption capacity, diffusing speed, and mechanical strength.

The invention relates to a nitrogen-doped porous hollow carbon sphere carbon dioxide adsorption material as well as a preparation method and application thereof. The preparation method comprises the following steps: adding SiO2 sphere flowers into mixed liquid of deionized water, absolute ethyl alcohol and ammonia water, and carrying out ultrasonic oscillation until the SiO2 sphere flowers are completely dispersed; and then adding a dopamine hydrochloride water solution, uniformly stirring at the room temperature, filtering, washing, drying, and processing at 700-900 DEG C for 2-4 hours in a N2 atmosphere so as to obtain nano-composite spheres; and finally impregnating the nano-composite spheres in hydrofluoric acid to remove the SiO2 sphere flowers, filtering, washing, and drying, so as to obtain the nitrogen-doped porous hollow carbon sphere CO2 adsorption material. The adsorption material is a porous hollow carbon sphere, the particle sizes of porous hollow nano-carbon spheres are about 400nm, the porous hollow nano-carbon spheres are uniform and regular, and the adsorption material has high nitrogen content, adsorptive property, specific surface area and pore volume and high-dispersed regular appearance, the surface of the adsorption material contains rich amino active sites, and the adsorption material can be applied to efficient adsorption of industrial CO2.

The invention discloses a method for preparing sulfured magnetic chitosan and a method for treating waste water containing heavy metals by using the sulfured magnetic chitosan, which belong to the technical field of material preparation. The method for preparing the sulfured magnetic chitosan comprises: dispersing a ferrous salt and a ferric salt in acetic acid solution of chitosan in advance; dripping the mixed solution into alkaline solution by using an injector to form magnetic chitosan spheres; crosslinking the spheres by using glutaraldehyde to form crosslinked magnetic chitosan spheres;and drying under vacuum, grinding into powder and obtaining the sulfured magnetic chitosan. The prepared material is used for treating waste water containing heavy metals.

The invention relates to a preparation method of a magnetic cadmium ion surface imprinted polymer, which comprises the following steps: synthesizing magnetic Fe3O4@SiO2 microspheres through a coprecipitation method and a sol-gel method, and treating with acid to increase the surface hydroxyl content; introducing polymerizable double bonds onto the surfaces of the Fe3O4@SiO2 microspheres through a two-step method, namely grafting amino groups onto the surfaces of the microspheres by using aminosilane coupling agent, and generating the double bonds through reaction between acid anhydride and the amino groups; and finally, performing polymerization reaction by taking the Fe3O4@SiO2 microspheres as carriers, taking Cd(II) as a template, taking ethylene glycol dimethacrylate as crosslinking agent and taking methacrylic acid and salicylaldoxime as monomers, and washing off the template Cd(II) after the reaction, thus obtaining a polymer layer with a large number of Cd(II) imprinted holes distributed on the surfaces of the Fe3O4@SiO2 microspheres. The magnetic cadmium ion surface imprinted polymer provided by the invention can be used for separation and removal of cadmium ions.

The invention relates to a cellulose base adsorption material used for removing arsenic ions and fluoric ions in water and a preparation method thereof. In the invention, natural cellulose or fibers of cellulose derivatives with the diameter of 10nm-100mu m is taken as matrix material for the absorption material; polyolefin containing an amino group is grafted on the surface of the cellulose matrix material, thus the surface of the cellulose matrix material contains the amino group; and electrostatic attraction can be realized between the contained amino group and arsenate anions, arsenite anions and fluoric ions in water, thus the harmful ions, namely the arsenate anions, arsenite anions and fluoric ions in water can be removed. Compared with the arsenic and fluorine removing material in the prior art, the material provided by the invention has the advantages that the natural cellulose or cellulose derivative is taken as an absorption carrier, the fluoric ions, arsenate anions and arsenite anions in water can be simultaneously absorbed, and the contents of the arsenic and fluorine in water can be far less than the national standards.

The invention discloses a method for preparing a modified microwave activated carbon sorbent. The method is characterized in that microwave activated carbon is taken as the carrier, loading alkaline metal ions K are taken as active components for modification, and the modified microwave activated carbon sorbent is prepared through adoption of ultrasonic wave equivalent impregnation. The method provided by the invention is simple, easy to operate and low in cost; and the sorbent prepared through the method has a good sorption effect, and more adsorption equilibrium selection factors of CO2/CO4 can be obtained.

The invention belongs to the technical field of material preparation and separation, and relates to preparation of lithium/rubidium ion adsorbing materials, in particular to a preparation method and application of a modified hollow mesoporous silicon sphere adsorbent. Hollow mesoporous silicon spheres (HSs) are synthesized, a manganese-based lithium ion sieve (HMO) is supported on the surface of the hollow mesoporous silicon spheres (HS), and finally, 3-aminopropyltriethoxysilane (APTES) is modified to form the modified hollow mesoporous silicon sphere adsorbent. Synthetic process steps are simple, the prepared micro-nano hollow mesoporous silicon spheres have the advantages of large specific surface area, modifiable surface hydroxyl, good mono-dispersity, good particle size and duct size adjustability and the like, the surface of the micro-nano hollow mesoporous silicon spheres with a high specific surface is modified, and the adsorbing capacity of the materials is greatly improved. The manganese-based lithium ion sieve and the APTES are compounded with the micro-nano hollow mesoporous silicon spheres to obtain the modified hollow mesoporous silicon sphere adsorbent with unique physical and chemical properties, and lithium/rubidium ions can be efficiently adsorbed and separated in a high-selectivity manner.

The invention discloses a preparation method of a mesoporous alumina composite adsorbent functionalized by alkali metal. The method comprises the following steps of: firstly fully agitating and uniformly mixing aluminum salt solution and Pluronic triblock copolymer solution, dropwise adding carbonate solution of the alkali metal in the case of slow agitation, and preparing the mesoporous alumina composite adsorbent functionalized by alkali metal from the obtained sediment via washing, drying and calcining of deionized water and absolute ethyl alcohol after solvent evaporation induced self-assembly or hydro-thermal treatment. The preparation method disclosed by the invention has the advantages of simple process, mild condition, low material cost, in-situ one-pot liquid-phase introduction of alkali metal components and carrier components and the like, and the obtained mesoporous alumina base composite material functionalized by Na- and K- has excellent adsorptive property on greenhouse gases CO2 (carbon dioxide) and highly toxic pollutants Cr (chromium)(VI) in a water body.

The invention relates to the absorbent manufacturing for separating Cs and Sr, made of crown ether and aromatic ether loaded on the big hole SiO2 coated with polymer, molecule ratio of the composition being 0. 3-2. 0, mass of the SiO2 being 2-40 times of the total mass of the aromatic ether that has general structural formula I and crown ether 4, and the Sio2 being phenylethene and divinylbenzene polymer. It does not need special dilution or solution treatment, getting over the deficiency of solution extracting, preserving the high volume of extraction.

The invention relates to a preparation method of a magnetic zinc ion surface-imprinted polymer, which comprises the following steps: synthesizing magnetic Fe3O4@SiO2 microspheres by a coprecipitation process and a sol-gel process, and treating with acid to enhance the surface hydroxy content; introducing a polymerizable double bond onto the surface of the Fe3O4@SiO2 microspheres by a two-step process, i.e. grafting amino group onto the microsphere surface by using an aminosilane coupling agent, and reacting acid anhydride with the amino group to generate the double bond; and finally, carrying out polymerization reaction by using the Fe3O4@SiO2 microspheres as a carrier, Zn (II) as a template, ethylene glycol dimethacrylate as a crosslinking agent and methacrylic acid and salicylaldoxime as monomers, and after the reaction finishes, washing out the template Zn (II) to obtain the polymer layer in which abundant Zn (II) imprinted holes are distributed on the Fe3O4@SiO2 microsphere surface. The magnetic zinc ion surface-imprinted polymer can be used for separating and removing zinc ions.

The invention discloses an amine-terminated hyperbranched polymer solid amine adsorption material as well as a preparation method and application thereof. The preparation method comprises the following steps: carrying out a Michael addition reaction between an amination reagent and an unsaturated monomer, so as to generate a hyperbranched polymer precursor; realizing polycondensation reactive synthesis in programmed temperature, so as to obtain an amine-terminated hyperbranched polymer; carrying out cross-linking and solidifying; reducing amide groups and imine groups so as to obtain the solid amine adsorption material. The solid amine adsorption material prepared according to the method has high alkyl amine density, has not only very high adsorption capacities for acid gases such as CO2, SO2 and H2S, but also excellent adsorptive regeneration performance, is high in heat stability and chemical stability, and high in adsorption capacity even after multiple regeneration, and can be used in the fields of acid gas adsorption trapping and environmental management, and the field of CO2 removing in a closed system.

The invention relates to a process for treating oil-containing waste water for a ship. The process comprises the following technical steps of: performing solid and liquid separation, coalescing separation treatment, adsorbing separation treatment and the like on pretreated ship oil-containing waste water sequentially. When the oil content in supplied water is less than or equal to 500 mg/L and the turbidity of the supplied water is less than or equal to 200 NTU, the oil content in discharged water quality is less than or equal to 1 mg/L and the turbidity of the discharged water quality is less than or equal to 5 NTU; and the national standard of the Integrated Pollutant Discharge Standard GB8978-1996 can be met. The method is high in treatment capacity of purifying the oil-containing waste water, namely the waste water treatment amount is up to 10 to 100 m<3>/hr, and is high in purifying efficiency, namely the oil removal rate is more than 99 percent and the turbidity removal rate is more than 90 percent. The process for treating the oil-containing waste water for the ship can be also applied to various types of oil-containing waste water, such as oil-field reinjected water, oil-base oil-containing waste water, metallurgical oil-containing waste water, steel factory oil-containing waste water, machined oil-containing waste water and the like, so that the treated oil-containing waste water can be treated until reaching the standard, and waste oil resources can be recycled.

The invention discloses a modified rice straw stalk and a preparation method and an application thereof. The modified rice straw stalk is obtained by the steps of carrying out solid-state fermentation of rice straw stalk, a white-rot fungus spore suspension and a trace element liquid, then mixing with oxalic acid, and carrying out ultrasonic treatment and heating reaction. The preparation method includes the steps of solid-state fermentation and chemical treatment. The modified rice straw has high specific surface area and specific pore area, contains more -COO<-> groups, and can be applied to treatment of wastewater containing cadmium; an application method includes the following steps of mixing the modified rice straw stalk with the wastewater containing cadmium, and carrying out oscillation adsorption, wherein the mass volume ratio of the modified rice straw stalk to the wastewater containing cadmium is (5 g-6 g) to (1 L). The modified rice straw stalk has the advantages of high treatment efficiency, good treatment effect, environmental protection and no secondary pollution.

The invention discloses a modified active carbon of fuel oil desulfurization and preparing method and device, which comprises the following steps: putting the U type pipe incorporating activated char of preliminary treatment into microwave reactor; leading into nitrogen; operating microwave reactor; cooling active carbon to room temperature; leading into nitrogen; placing quartz pipe with gas inlet and outlet into microwave reactor (4); connecting gas inlet side of quartz pipe (5) and gas flow controller (3); putting adsorbent active carbon (6) in the quartz (5). The surface of the preparing active carbon includes phenolic hydroxyl group, carboxyl acid group and inner ester group, wherein the density of carboxyl acid group can reach 0.0011mmol/g-0.0634mmol/g.

The invention discloses a magnetic dual-template protein molecule imprinted nano particle and a preparation method thereof. The surface amino-functionalization superparamagnetic nano particle is used as a carrier, and two types of protein are used as template molecules; the template molecules are fixed on the surface of the magnetic carrier; the polymer is formed under the effect of 3-aminopropyl triethoxysilane and octyltrimethylsilicane; then the template molecule in the polymer is washed out to obtain the magnetic dual-template protein molecule imprinted nano particle. The magnetic dual-template protein molecule imprinted nano particle prepared through the method is low in material cost, simple to prepare, rapid to separate, and various abundant protein constituents in complex biological systems are simultaneously, effectively and selectively removed and enriched more easily.

The invention discloses an oxygen-functionalized carbon material and uses of the same, and belongs to the technical field of adsorbent. The invention is characterized in that the oxygen-functionalized carbon material is prepared by oxidative modification of hydrogen peroxide or ultrasonic-assisted hydrogen peroxide; the number of oxygen-containing functional groups on the surface of the carbon material after the oxidative modification of the hydrogen peroxide is obviously increased, but the pore structure and the strength of the carbon material are basically kept unchanged; the adsorption capacity of the oxygen-functionalized carbon material on metallic ions such as Ag, Cu and Cr is greatly improved compared with a raw material carbon; and when an impregnated carbon catalyst prepared by infusing the oxygen-functionalized carbon material is used for protecting cyan chloride, the protection time of the impregnated carbon catalyst is improved by 20 to 30 percent under the same preparation condition compared with the raw material carbon. The oxygen-functionalized carbon material prepared by the oxidative modification of the hydrogen peroxide or the ultrasonic-assisted hydrogen peroxide has the advantages of simple process, quickness, environmental protection, and the like, and provides an effective carbon carrier for the impregnated carbon catalyst for protecting the cyan chloride.

The invention discloses a synchronous-pyrolysis iron loaded biochar preparation method which comprises the following steps: S1, preparing a biomass raw material, cleaning the biomass raw material andsmashing and sieving to obtain biomass powder; S2, soaking the biomass into an iron containing solution; S3, evenly mixing the biomass powder with the iron containing solution and filtering to achievesolid-liquid separation; S4, pyrolyzing the filtered biomass powder under the anaerobic condition, wherein a pyrolysis temperature is 500 to 700 DEG C, and thermal-insulation time is 1 to 3 hours; S5, smashing and sieving the pyrolyzed biomass powder to obtain the iron loaded biochar. The biochar prepared from the raw material of phyllostachys viridis can be applied to a heavy metal cadmium ion removing process in a water environment, so that the problems that an existing adsorption technology has a poor adsorption effect and secondary pollution in a heavy metal adsorption process are solved;meanwhile, a biochar carbonizing process can seal carbonic acid in biochar, emission of greenhouse gas of carbon dioxide is reduced, and an environmental ecological effect is beneficiated.

The invention relates to an adsorption purification method for hydrocarbon stream, which is mainly used for solving the problems of low adsorption capacity of adsorbent, need of frequent regeneration and high regeneration temperature in the existing adsorption purification method. The method can better solve the problems by adopting the technical scheme of leading hydrocarbon raw material containing a certain amount of oxygen-containing compound impurities to be in contact with the solid compound adsorbent containing metal halide, wherein the adsorbent comprises halide or sulfate of at least one metal selected from alkali metals or alkaline-earth metals and at least one molecular sieve selected from A type, Y type, L type, mordenite, ZSM type zeolite or beta type molecular sieve, and be used for the adsorption purification industrial production of various types of hydrocarbon stream.

The invention relates to a gas adsorbent of nitrogen oxides and a preparing method thereof in the technical field of air pollution. The gas adsorbent of the nitrogen oxides comprises active carbon, alkaline substances and metallic oxides. The preparing method comprises surface active modification, solution impregnation and metal load which are combined for preparing the gas adsorbent of the nitrogen oxides. The obtained adsorbent has high adsorption rate, large adsorption capacity and long penetration time to the nitrogen oxides, the preparation cost is lower than that of the prior art, and the preparation process is simple.

The invention discloses a complex function resin and process for preparation, and a method used for dealing with phthalate ester water body pollution. The process for preparation comprises the following procedures: swelling chlorine ball in the organic solvent; sulfonating in the mixing condition; getting the sulfonated chlorine ball after reacting; charging nitrobenzene or o-dichlorobenzene in order to swell in the air-tight condition after drying the sulfonated chorine ball; charging the accelerant in order to react; filtering the resin; washing the resin sequentially with distilled water, alcohol and chlorhydric acid 2%-5%; washing the resin with the distilled water until the washed water is neutral; getting the complex function resin. The specific surface area of the complex function resin is 900-1500m2/g, the exchange capacity of corrosive acid is 2.1-5.5mmol/g, and the sulfonic group is distributed in the micropore section, the mesopore section and the big pore section of the resin. The complex function resin is applied to deal with water body polluted by phthalate ester. The invention solves the problem that the corrosive acid of the prior complex function resin is concentrated in the mescopore and the big pore of the resin and is distributed less in the micropore, which enhances the absorption effect of the resin for phthalate ester, and enhances the acid hydrolysis catalytic activity of the resin.

There is provided a porous formed article which can remove hazardous substances at a high speed, has a high adsorption capacity and has high durability to cleaning chemicals and further which is scarcely broken even if being repeatedly used, and which contains an organic polymeric resin and an inorganic ion-adsorbing material, wherein the organic polymeric resin is a polyether sulfone resin and/or a polysulfone resin, and is an organic polymeric resin having a hydroxyl group.

The invention relates to a preparation method of biomass carbon adsorption material, and belongs to the technical field of environment-friendly materials. According to the invention, plant straws aresubjected to a trace of gasification treatment, part of structures of cellulose, lignin and the like in the plant straws can be removed in the gasification treatment process, so that the straw is enabled to be fluffy and the surface of the straw is enabled to have abundant active groups, meanwhile, ammonium hydrogen carbonate is added to form pores and expande porosity, and then mixed with sodiumsilicate which is used for supplying silicon source, so that sodium silicate is loaded in the straw pores, mesoporous nano-silica is formed through action of effect to fill the pores in the straws soas to improve adsorption capacity and adsorption effects of the straws, then mixed with oleic acid, oleic acid is adsorbed in the straws through adsorption of the straws so as to improve the adsorption property of biomass carbon to heavy metal ions, therefore the problems of poor removal efficiency and low adsorption capacity of the biomass carbon adsorption material to the heavy metal ions at present are effectively solved.

The invention discloses a beta-cyclodextrin polymer adsorbent applicable to adsorption of dye and heavy metal ions, and a preparation method and application thereof. According to the method, modifiedbeta-cyclodextrin, obtained by reaction between a silane-protected beta-cyclodextrin derivative and alkenyl anhydride, and heterocyclic olefinic monomers are subjected to free-radical crosslinking copolymerization to obtain the beta-cyclodextrin polymer adsorbent, wherein the structural general formula is shown in the description. The porous large-specific-surface copolymer can be formed during copolymerization between the modified beta-cyclodextrin and the heterocyclic olefinic monomers, and different adsorption sites are provided for the organic dye and the heavy metal ions, so that the adsorption capacity of the adsorbent can be improved greatly, and the mutual inhibition of the organic dye and the heavy metal ions as wells as the poor removal effect can be relieved effectively.

The invention relates to a solid adsorbent and a preparation method thereof, mainly solving the problems of low adsorption capacity and higher regeneration temperature of the adsorbent in the prior art. By adopting the technical scheme that a compound solid adsorbent is prepared by combining at least one kind of halide of alkali metal, halide of alkaline earth metal or metal sulfates with a molecular sieve, the invention better solves the problems and can be used for industrial production of adsorption and purification of various hydrocarbon raw materials.

The invention belongs to the technical field of water treatment and particularly relates to a preparation method of a composite modified fluoride-removing adsorbent. The method comprises the steps of crushing and calcining an animal bone as a raw material and then washing to prepare hydroxyapatite powder with a porous structure; preparing an aluminum-based sol by using aluminum sulfate, loading the aluminum-based sol on the hydroxyapatite powder, wherein the specific surface area of the natural porous hydroxyapatite powder is further improved and the adsorption capacity is improved and can reach 120-130mg/g through the synergistic effect of the aluminum-based sol and organic carbon among pores of the hydroxyapatite powder; preparing a solution from a rare-earth salt and a metal salt, and compounding rare-earth ions and metal ions through the synergistic effect of an aluminum base and hydroxyapatite under an alkaline condition, thereby further strengthening the electrostatic effect and strengthening the effects of lewis acid and base and the complexing action with fluoride ions and reducing the concentration of the fluoride ions in underground effluent to 0.9mg/L. The preparation method has the characteristics of being high in adsorption rate, easy to regenerate and stable in performance.

The invention relates to a method for removing perchlorate ions in water. Absorption material loaded with hydration ferric oxide is added, and the absorption and complexation functions of the loaded hydration ferric oxide are used to absorb and remove perchlorate ions. The method for preparing the absorbing material is as following: FeSO4 7H2O or FeCl3 7H2O or FeCl2 4H2O or Fe2SO43 9H2O and granular carbon are mixed and heated for the hydrolysis of ferric salt for a time, strong alkali is added into the solution, the pH value is regulated to the range from 7 to 9, the solution is heated for a time again, and hydration ferric oxide is formed on carbon and has a strong absorption function on the water solution containing perchlorate ions. The method can remove and absorb the perchlorate ions contained in iron water solution and the perchlorate ions contained in the product water of a water plant to achieve the water quality standard of drinking water.

The invention discloses a cold and hot type adsorption-desorption device and an adsorption-desorption method thereof, belonging to a device and a method for treating organic waste gas. The device comprises an adsorption tank which is provided with an opening used for leading in waste gas and vacuumizing, a clean gas outlet, a tube pass inlet used for leading in cold medium or hot medium and a tubepass outlet used for leading out cold medium or hot medium; the adsorption tank is internally provided with tube arrays which are evenly distributed in the adsorption tank, and the two ends of the tube arrays are respectively communicated with the tube pass inlet and the tube pass outlet; a shell pass of the adsorption tank is internally filled with adsorbing medium which surrounds the tube arrays; and the adsorption tank also carries out low temperature adsorption and high temperature desorption operations. In the invention, the adsorption tank is provided with tube arrays, and cold medium or hot medium can be led into the tube arrays, thus realizing low temperature adsorption and high temperature desorption operations, reducing the level of vacuumizing, saving energy consumption, substantially reducing requirements on the device in the desorption process, improving the adsorption and desorption efficiency, prolonging the service life of the adsorption medium and saving production cost.