473 results about "Metal chloride" patented technology

Disclosed in the present invention are a bimetallic-atom-loaded porous carbon framework material, and a preparation method therefor and the use thereof. The preparation method comprises: by taking a metal organic framework as a precursor raw material, and by using the self-polymerization of a high-molecular polymer on the surface of the metal organic framework, forming a polymer-coated metal-based organic framework material (PM@MOF) having a core-shell structure; and then capturing the metal of a metal chloride salt solution by using surface functional groups of the PM@MOF dispersed in n-hexane, so as to obtain a bimetallic element-doped polymer-coated metal-based organic framework material, and subjecting same to a high-temperature treatment in an argon gas atmosphere so as to obtain a bimetallic-atom-loaded porous carbon-based material (MD@PC). In the present invention, by loading bimetallic atoms on a nitrogen-doped porous carbon matrix to form MD-NX coordination sites, which have the dual functions of sulfur fixation and catalysis, the agglomeration degree of intermediate phase lithium sulfide can be reduced, thereby guaranteeing that the lithiation reaction of sulfur is more sufficient, rapid and efficient.

The invention discloses a wear-resistant and impact-resistant composite PVC material and a preparation method thereof, and belongs to the technical field of high polymer materials, the wear-resistant and impact-resistant composite PVC material comprises the following raw materials by weight: 80-100 parts of epoxy polyvinyl chloride, 10-15 parts of a plasticizing stabilizer, 10-12 parts of an impact modifier, 0.5-2 parts of a lubricant, 5-10 parts of a filler, 2-3 parts of an antioxidant and 2-3 parts of a heat stabilizer; the preparation method comprises the following steps: preparing a metal soap stabilizer, absorbing pyrolysis gas, decomposing to generate metal chloride, enhancing the flame retardant property of the material, and uniformly dispersing the metal soap stabilizer as a filler in the material, so that an epoxy group in the prepared modifier absorbs hydrogen chloride and hybridizes a polyvinyl chloride chain segment at the same time, thereby enhancing the flame retardant property of the material. And a double-bond structure reacts with pyrolysis free radicals to generate an annular structure, so that the impact resistance of the material is enhanced.

According to the method for gradient separation of the heavy metal in the household garbage incineration fly ash, the composition and content of the household garbage incineration fly ash are detected in advance, and grinding pretreatment is conducted on the household garbage incineration fly ash; a plurality of reaction temperature intervals corresponding to various heavy metals in the household garbage incineration fly ash are arranged in a heating furnace, the household garbage incineration fly ash is subjected to multi-stage heating roasting, and chlorine element compounds contained in the household garbage incineration fly ash react with the heavy metals under the high-temperature condition to be volatilized, so that heavy metal chloride gas is obtained; a certain amount of protective gas is introduced into the heating furnace in each reaction temperature interval to prevent the unvolatilized heavy metal chloride from being oxidized, and finally all heavy metals are successfully separated out; a plurality of condensation temperature sections are arranged in the sectional condensation pipe, heavy metal chloride is recycled step by step at different condensation temperatures, and separation and recycling of different heavy metals are achieved; according to the scheme, complex operation procedures can be avoided, energy consumption is reduced, and the method has remarkable economic and social benefits and wide application prospects.

The invention discloses a waste wind power blade recycling process. The waste wind power blade recycling process comprises the following steps that S1, a waste wind power blade is cut into blocks; wherein manufacturing materials of the waste wind power blade comprise carbon fibers and epoxy resin; s2, the block is put into a swelling solution to be subjected to swelling treatment; wherein the swelling liquid comprises a swelling agent and a solvent, the swelling agent is an inorganic metal chloride, the solvent is composed of acetone and water, in the solvent, the mass percentage of acetone is 10-40%, the mass percentage of water is 60-90%, and in the swelling liquid, the molar concentration of the swelling agent is 0.004-0.1 M; s3, cracking the block subjected to swelling treatment to obtain a cracking product containing the inorganic filler and the carbon fiber material; and S4, recycling the carbon fiber material in the cracking product. The recycling process has the advantages of being efficient, environmentally friendly, low in cost and the like, and is suitable for large-scale resource recycling of the wind power blades.

The invention belongs to the field of electronic materials, and particularly relates to a synthesis method of a high-purity metal complex precursor. Compared with a synthesis method in the prior art, the synthesis method provided by the invention changes a reaction route, substituted cyclopentadiene is prepared firstly, then the substituted cyclopentadiene reacts with butyl lithium and metal chloride in sequence to obtain a substituted cyclopentadienyl metal trichloride intermediate, and finally the substituted cyclopentadienyl metal trichloride intermediate reacts with lithium dialkylamino to obtain the substituted cyclopentadienyl metal trichloride. The target product substituted cyclopentadienyl tri (dialkylamino) metal complex is obtained, and the prepared product is high in yield and purity. The synthesis method provided by the invention is convenient for large-scale production in factories, improves the productivity, and meets the ever-increasing market demand.

The present invention relates to a porous composite feedstock for metal chloride preparation, comprising a metal oxide containing material,; and / or a first additive; and a binder; wherein the porous composite feedstock is in particulate form; wherein the water content of the porous composite feedstock is in the range of from 0.01 to 5 wt.% based on the weight of the porous composite feedstock; and wherein the porous composite feedstock has a poured bulk density in the range of from 0.2 g / cm3 and 2.0 g / cm3.

The invention discloses a preparation method of a polyurea elastomer containing multiple hydrogen bonds and metal coordination bonds, aiming at the problem of poor repeated processability of a single dynamic bond and a cross-linked polyurea elastomer, the multiple hydrogen bonds are introduced through dihydrazide chain extension, and network toughness integration is realized through coordination of pyridine and metal ions, so that the toughness of the polyurea elastomer is improved. A polyurea elastomer containing multiple hydrogen bonds and metal coordination bonds is developed. The specific method comprises the following steps: firstly, preparing an isocyanate-terminated prepolymer A, secondly, quantitatively adding the isocyanate-terminated prepolymer A, 2, 6-diaminopyridine, dihydrazide, metal chloride and a catalyst into a solvent according to a certain sequence, stirring and reacting to obtain the double dynamic network polyurea elastomer, and finally forming a product by adopting a polymer secondary processing mode. The raw materials are cheap and easy to obtain, and the preparation process is simple and efficient and suitable for batch production.

The invention discloses a preparation method of an oxychloride electrolyte material, the oxychloride electrolyte material and an all-solid-state battery, and the method comprises the following steps: providing raw materials; the raw materials comprise metal chloride and lithium hydroxide; and reacting the metal chloride in the raw material with lithium hydroxide in an inert gas atmosphere to obtain the oxychloride electrolyte material generated by the reaction. Lithium hydroxide is used as a lithium raw material, the price is low, the preparation cost is reduced, hydrogen chloride is generated in the mixing preparation process, an acidic catalysis environment is provided, and the preparation time is shortened; an oxygen element and a chlorine element are introduced into the prepared oxychloride electrolyte material, an oxygen-chlorine frame structure formed by the oxygen element and the chlorine element is an obvious flexible ion frame structure, and the ion frame structure reduces the diffusion activation energy of lithium ions, so that the room-temperature ion conductivity of the oxychloride electrolyte material is improved.

To provide a space purification device which suppresses strong alkalinity after electrolysis of an aqueous solution stored in a supply tank and thereby improves safety. [Solution] A space purification device 1 is provided, which comprises an electrolytic cell 10 for storing a first aqueous solution L1, a supply cell 20 for storing a second aqueous solution L2 and supplying chloride ions to the first aqueous solution L1, and an anion exchange membrane 30 connecting the electrolytic cell 10 and the supply cell 20 to allow anions to pass therethrough, wherein the second aqueous solution L2 is a metal chloride aqueous solution, and by performing diaphragm-containing electrolysis, the chloride ions contained in the second aqueous solution L2 stored in the supply cell 20 are passed through the anion exchange membrane 30 and supplied to the first aqueous solution L1 stored in the electrolytic cell 10 so as to replenish the chloride ions contained in the first aqueous solution L1 that have been reduced by diaphragm-less electrolysis, and in the supply cell 20, the metal ions contained in the second aqueous solution L2 react with the hydroxide ions generated by the diaphragm-containing electrolysis to form a metal hydroxide precipitate.

The invention discloses a preparation method of a catalytic membrane for organic wastewater treatment, which comprises the following steps: dissolving polyvinylidene fluoride (PVDF), a pore-forming agent and plant polyphenol in an organic solvent, and stirring to obtain a membrane casting solution, wherein the PVDF accounts for 12-20%, the pore-forming agent accounts for 1-8%, and the plant polyphenol accounts for 1-6%; standing and defoaming the membrane casting solution, blade-coating the membrane casting solution on a support body to form a membrane, and performing phase inversion in a water bath to obtain the plant polyphenol modified PVDF membrane; and immersing the membrane in a 3-10 mmol / L metal chloride aqueous solution, and reacting at 40-80 DEG C for 6-48 hours, so that metal ions and polyphenol are coordinated and crosslinked, and a metal-polyphenol network layer is formed on the surface of the membrane and the inner walls of membrane pores, thereby obtaining the catalytic membrane. The catalytic membrane can activate peroxymonosulfate (PMS) and synergistically degrade organic pollutants in water under a differential pressure filtration working condition, active sites are anchored stably, metal precipitation is reduced, and flux and catalytic efficiency are both considered.

The invention provides a method for recycling valuable metal from germanium-antimony-tellurium alloy waste. The method comprises the three steps of surface treatment, chlorine reaction and compartment condensation and discharging. Oxidation films on the surfaces of the waste materials are removed through surface treatment, and the subsequent chlorine reaction efficiency is improved; then a self-made chlorination-step condensation integrated device is utilized, germanium, antimony and tellurium react with chlorine at the high temperature to generate gaseous chloride, step-by-step condensation separation is achieved through partition temperature control based on the boiling point difference of tellurium tetrachloride, antimony pentachloride and germanium tetrachloride, and target products are collected respectively; and finally, introducing inert gas to purge residual chlorine, and discharging safely. The method has the advantages of short process flow, no need of complex wet process steps and low equipment investment; metal chlorides are efficiently separated through the integrated device, and recovery is thorough; and the pyrogenic process is mainly adopted, no wastewater is generated, only tail gas is treated in a compliance manner, and the method is environment-friendly. Compared with a traditional wet process, the method has the remarkable advantages of high efficiency, low cost, environment friendliness and the like.

A method for producing high-purity silicon carbide powder includes filling starch-based packing chips or expanded starch as organic raw material into a container open at the top; introducing the container filled with the raw material into a furnace and heating the packing chips, or the expanded starch, gradually to a temperature of 2,000° C. whilst feeding inert gas or under vacuum to graphitize the packing chips or the expanded starch into porous graphite pieces; feeding halogen gas, such as chlorine or fluorine, into the furnace to purify the porous graphite pieces at a temperature of >1,800° C. to remove foreign metals from the porous graphite pieces by forming metal chloride, and converting the porous graphite pieces into powdered silicon carbide by feeding SiO with argon as carrier gas at a temperature of >1,200° C. at a pressure of 30 mbar or higher.

A rechargeable electrochemical cell (10) comprises an anode compartment (14) and a cathode compartment (15), the compartments being enclosed in part by metal plates (11, 12) that define end faces of the cell (10), the two compartments (14, 15) being separated by an impermeable, ion-conducting electrolyte element (13). The cell (10) is a molten sodium / metal chloride cell, and the plate (12) enclosing the cathode compartment defines a slightly concave end face surrounded by a flat rim. The volume change of the cathodic materials as the cell is heated up to its operating temperature are accommodated by flattening of the concave end face, so the overall thickness of the cell (10) does not change.

The invention belongs to the technical field of rubber auxiliaries and rubber tracks, and particularly relates to a coupling agent composition for inhibiting rubber appearance flooding and application of the coupling agent composition in the rubber tracks. The coupling agent composition comprises the following components in percentage by weight: 15%-30% of coupling agent, 1%-15% of metal chloride and 70%-85% of clay mineral. Different from a microcapsule technology only aiming at anti-aging agent migration, the coupling agent composition disclosed by the invention can effectively capture various types of color-flooding source substances including carbon black residues, anti-aging agents, antioxidants and the like by starting from common characteristics (containing unsaturated bonds, heteroatoms and aromatic structures) of color-flooding small molecules and through the synergistic effect of the coupling agent and metal ions, so that the color-flooding source substances can be effectively captured. And the method has wide applicability. In addition, a composite system composed of the clay, the coupling agent and the metal chloride can improve the bonding strength of the rubber and a track framework material, and is suitable for being applied to a heavy-load rubber track.

The invention provides a system and a method for recycling solid content in polycrystalline silicon slag slurry, the system receives the polycrystalline silicon slag slurry generated by an upstream system, and chlorosilane, metal chloride and silicon powder are obtained after separation; comprising a slag slurry storage tank for receiving the polycrystalline silicon slag slurry generated by an upstream system, a filtering system for solid-liquid separation, a chlorosilane storage tank, a first drying machine, a rectification device, a second drying machine, a silicon powder storage tank, a separator, a fluidized bed, a metal chloride storage tank and a high-boiling cracking device, the method is realized by adopting the system, and the solid content in the polycrystalline silicon slag slurry is recycled.

The invention provides a preparation method of a metal chloride salt assisted pyrolysis Fe-N-C cathode oxygen reduction catalyst, which comprises the following steps: uniformly mixing ZIF-8 and metal chloride salt in water, and carrying out rotary evaporation drying to obtain a first composite solid; in a protective atmosphere, the first composite solid is subjected to first pyrolysis, so that metal chloride salt flows in the first composite solid in a molten state, the nitrogen-doped carbon substrate with increased porosity is obtained after acid pickling, and the melting point of the metal chloride salt is lower than the pyrolysis temperature of the first pyrolysis; grinding and mixing the nitrogen-doped carbon substrate, an external nitrogen source and ferric salt to obtain a second composite solid; and in a protective atmosphere, performing second pyrolysis on the second composite solid, and performing acid pickling and drying to obtain the Fe-N-C cathode oxygen reduction catalyst. The invention further provides the Fe-N-C cathode oxygen reduction catalyst obtained through the preparation method and application of the Fe-N-C cathode oxygen reduction catalyst.

The invention provides an iron-doped copper nanocluster nano-enzyme, a preparation method thereof and application of the iron-doped copper nanocluster nano-enzyme to detection of penicillin sodium by a colorimetric method. According to the preparation method, PVP-K30 and metal chlorate are taken as initial raw materials, deionized water is taken as a solvent environment, and the iron-doped copper nanocluster nanoenzyme is prepared through oil bath heating synthesis and dialysis purification. When 3, 3 ', 5, 5'-tetramethyl benzidine-hydrogen peroxide reaction is catalyzed by the nano-enzyme, the nano-enzyme is found to have an excellent peroxidase simulation effect, and rapid colorimetric detection of penicillin sodium is realized. The nano-enzyme provides an important thought for the development of novel nano-enzymes, and has a potential application value for the detection of antibiotics in a complex matrix.

The invention provides a preparation method of a light conversion packaging adhesive film for a solar cell, and the method comprises the steps: preparing perovskite quantum dots, an alkaline earth metal chloride solution and a perovskite quantum dot packaging adhesive film, and carrying out the reaction of Cs2CO3, oleic acid and 1-octadecene under the protection of inert gas to prepare a precursor A; adding PbCl2 and transition metal chloride into a mixed solvent to prepare a solution B; after heating, adding the precursor A into the solution B for reaction to obtain a perovskite quantum dot solution; mixing the perovskite quantum dot solution, the blank colloidal particles and an alkaline earth metal chloride solution, and performing melt extrusion and granulation to obtain perovskite quantum dot colloidal particles; and mixing the perovskite quantum dot colloidal particles with a coupling agent, a cross-linking agent, a light stabilizer, an antioxidant and other components, and carrying out film casting to obtain the packaging adhesive film. According to the invention, the photoluminescence quantum efficiency of perovskite and the optical performance of the packaging adhesive film are significantly improved, and the problem of low luminous efficiency of the existing perovskite quantum dot adhesive film is solved.

The invention belongs to the technical field of octafluorocyclopentene gas preparation, and particularly relates to a catalytic synthesis method of octafluorocyclopentene. The method specifically comprises the following step: under the action of a fluorine-chlorine catalyst, carrying out gas-phase catalytic fluorination reaction on 1-chloroheptafluorocyclopentene and anhydrous hydrogen fluoride at 80-120 DEG C to obtain octafluorocyclopentene. The preparation method of the fluorine-chlorine catalyst comprises the following steps: dissolving metal chloride in water, adding a precipitant, and fully stirring for reaction to obtain slurry; filtering the slurry to remove filtrate to obtain a solid, and washing the solid with deionized water until the solid is neutral; adding aluminum nitrate into the washed solid, fully stirring and drying to obtain a precursor of the catalyst; and performing compression molding on the precursor of the catalyst, roasting, and activating to obtain the fluorine-chlorine catalyst. The method is mild in reaction condition and high in catalytic efficiency.

The invention discloses a method for catalyzing degradation of polyolefin mixed plastic by using molten salt. The catalyst is composed of gallium chloride or gallium chloride and other metal chlorides, has a low melting point, high fluidity and strong Lewis acidity, and can degrade polyethylene (PE), polypropylene (PP), polystyrene (PS) plastics and mixtures thereof at 70-170 DEG C under a solvent-free condition to obtain C4-C16 + alkane, olefin and aromatic hydrocarbon. The method is suitable for actual waste plastic resource recovery, and has the advantages of mild conditions, low energy consumption, product controllability and the like.

The invention relates to the field of advanced flame-retardant aerogel materials, in particular to a flame-retardant heat-insulating nano-cellulose composite aerogel material, a preparation method and application. The preparation method comprises the following steps: S1, dispersing inorganic nanosheets, a nanocellulose solution and sodium alginate in water, and stirring to obtain a mixed solution; the mass ratio of the inorganic nanosheets to the nanocellulose solution to the sodium alginate to the deionized water is (0-5): (50-100): 2: 98; s2, slowly pouring the mixed solution into a mold, putting the mold into a refrigerator for freezing, after a sample is completely frozen, putting the sample into a surface active solvent, and adding metal chloride and a cellulose cross-linking agent into the solvent at the same time; then sodium alginate ion crosslinking and cellulose crosslinking are carried out under the condition of subzero; the mass ratio of the metal chloride to the cellulose cross-linking agent to the surface active solvent is (0.5-1.1): (1-2): 200; and then putting the mixture into a blast oven for normal-temperature and normal-pressure drying to obtain the flame-retardant and heat-insulating nano-cellulose composite aerogel material.

Removing metal from metal-carbon material includes contacting the metal-carbon material with hydrogen chloride, thereby yielding a metal chloride in the gas phase and a solid product comprising carbon. The metal-carbon material and the solid product may both contain elemental carbon. A concentration of metal in the solid product is typically less than 1 wt %.

The invention belongs to the field of synthesis of luminescent materials, and relates to a preparation method and application of a zero-dimensional manganese-based hybrid halide nanofiber membrane with reversible photoluminescence and radiation luminescence conversion. The synthetic route is as follows: preparing a precursor from 4-dimethylaminopyridine (DMAP) and hydrochloric acid, then synthesizing zero-dimensional organic-inorganic metal chloride with manganese chloride hydrate (MnCl2. 4H2O) and anhydrous manganese chloride (MnCl2), further mixing the zero-dimensional organic-inorganic metal chloride with polyvinylidene fluoride (PVDF), and performing electrostatic spinning to obtain a nanofiber film; compared with the prior art, the stimuli-responsive reversible PL switch flexible fiber membrane prepared by adopting an electrostatic spinning technology has excellent stability and PL switch performance, and can show efficient PL and RL switching under external stimuli. Meanwhile, the flexible nanofiber film produced by the method has the advantages of one-step synthesis, quick response, repeatability, good portability and low cost, so that the flexible nanofiber film becomes a new application of molecular-level dynamic photonic devices for data storage, information security, optical logic gates, flexible X-ray imaging and the like.

An electrochemical reactor comprising a source of a magnetic field positioned in proximity to a cathode and configured to generate a magnetic field; and an electrochemical cell comprising an anode and the cathode, and further comprising a catholyte channel configured to direct a catholyte stream comprising an iron-containing feedstock to the cathode; an anolyte channel configured to direct an anolyte stream comprising a metal chloride to the anode, wherein the catholyte channel and the anolyte channel are disposed between the cathode and the anode; and a separator disposed between the catholyte channel and the anolyte channel, wherein the electrochemical reactor is configured to electrochemically oxidize chloride anions to chlorine gas at a surface of the anode, and wherein the electrochemical reactor is further configured to electrochemically reduce the iron-containing feedstock to an iron particle comprising iron metal at the surface of the cathode and in the magnetic field.

Provided are a preparation method of an ion catalyst material for PET chemical recycling and a PET chemical recycling method. The preparation method of an ion catalyst material for PET chemical recycling includes the following. A metal chloride is added to an alkylimidazole-chloride ionic liquid to form a bisalkylimidazole-metal tetrachloride ionic liquid that is grafted on a porous carrier.

The invention provides a preparation method and application of MAX phase derived polymetallic sulfide, and belongs to the field of lithium ion battery negative electrode material preparation. A MAX phase is used as a precursor, metal chlorides such as CuCl2, FeCl2 and CoCl2 are used as etching agents, K2S is used as a sulfur source, and etching in-situ vulcanization is performed under a NaCl / KCl molten salt system to obtain a series of multi-metal sulfide materials. When the prepared multi-metal sulfide material is used as a lithium ion battery negative electrode material, excellent cycle and rate performance is shown.

The present invention provides a sulfide-polymer composite solid electrolyte and a preparation method thereof, belonging to the field of batteries. In the present invention, lithium sulfide reacts with phosphorus pentasulfide to generate a partially crystallized sulfide network, and high-valent metal ions are doped to optimize the lattice structure, enhancing conductivity and chemical stability; the crystalline phase provides an efficient ion migration channel, and the amorphous region reduces the grain boundary effect and improves the conduction uniformity; a metal chloride and lithium fluoride coating layer is used to isolate moisture and oxygen, and polyaniline coating reduces the interfacial impedance and enhances the cycle stability. The crystallinity is reduced and the amorphous region is increased by sulfonated polyether ether ketone, providing a low-impedance path for lithium ions; the polyethylene glycol chain segment improves the flexibility and ion migration ability, and the three-dimensional network structure is formed by crosslinking to enhance the mechanical strength and interfacial stability. The inorganic phase and the polymer act synergistically to construct a bicontinuous ion conductive network to improve the comprehensive performance.

The invention discloses a sulfide solid electrolyte of a lithium ion battery, comprising: a sulfide solid electrolyte matrix comprising sulfur; the surface of the sulfide solid electrolyte matrix is coated with the coating layer, and the coating layer is formed by substitution reaction of metal chloride, 1-undecyl mercaptan and sulfur. The sulfide solid electrolyte disclosed by the invention is a sulfide solid electrolyte with high ionic conductivity and good interface stability at the same time. The invention also discloses a preparation method of the sulfide solid electrolyte, a composite sulfide solid electrolyte and a preparation method of the composite sulfide solid electrolyte.

The invention discloses a preparation method of a post-metallocene catalyst. The method comprises the following steps: by taking quinoline 2-formaldehyde and ortho-aminophenol as raw materials, carrying out reflux reaction on the raw materials and a first solvent to prepare a ligand; dispersing a metal chloride in a second solvent, adding a Grignard reagent, and carrying out a reaction at a low temperature to prepare a methylated metal reagent; and adding a ligand into the methylated metal reagent, reacting at room temperature for 10-12 hours, removing liquid in vacuum, adding part of the second solvent again, stirring, filtering after the product is dissolved, and recrystallizing the filtrate to obtain the product, the metallocene catalyst is obtained by firstly preparing the ligand, then preparing the methylated metal reagent, adding the ligand into the methylated metal reagent for reaction, then stirring by using the second solvent, filtering after the product is dissolved, and recrystallizing the filtrate, so that the operation steps are simple, and the preparation of the ligand does not need water-oxygen treatment operation, and is simple and easy to implement; the preparation cost of the post-metallocene catalyst is reduced, and the method is suitable for industrial large-scale production.

The invention provides a magnetic biomass charcoal nano polymer material for adsorbing heavy metals and a preparation method of the magnetic biomass charcoal nano polymer material, and belongs to the technical field of adsorption materials. The preparation method specifically comprises the following steps: S1, mixing a biomass charcoal nano material with ultrapure water, and performing ultrasonic dispersion; adding ferric chloride hexahydrate, ferrous chloride tetrahydrate and sodium citrate dehydrate, stirring and dissolving to obtain a mixed solution; s2, adjusting the pH value of the mixed solution at a constant temperature, reacting at a constant temperature, cooling, magnetically separating and washing to obtain a magnetic biomass charcoal nano material; s3, adding a nano material and potassium persulfate into the water phase A, then dropwise adding the oil phase B while stirring, carrying out a first reaction and a second reaction at a constant temperature, and then carrying out solid-liquid separation by using a magnet to obtain black solid powder; and S4, crushing the black solid powder, washing the crushed black solid powder with hot water, respectively removing the residual suspended emulsion with ethanol and an ethanol-acetic acid solution, and sequentially filtering, washing and drying the obtained product to obtain the product, and the product has the characteristics of large specific surface area, high selectivity and adsorption capacity, fast adsorption rate and good cyclic utilization performance.