202results about How to "Rich in micropores" patented technology

The invention discloses a method for preparing a carbon molecular sieve adsorbent. The steps are as follows: (1) solidification: polymer is used as a raw material and is arranged in a thermostatic drying oven to be solidified; (2) dry distillation: the solidified macromoleclar polymer is pulverized by a pulverizer and then is processed by dry distillation; (3) fine pulverization: the macromoleclar polymer which is pulverized and processed by dry distillation is further processed by fine pulverization in the premise that the particle diameter of the macromoleclar polymer does not meet the requirement, and ball milling or gas milling is used for preparing micro-particles; (4) molding: the macromoleclar polymer which is processed by fine pulverization is mixed and uniformly stirred with agglomerant by mass ratio, and the mixture obtained is pressed and molded by an oil hydraulic press and then is dried; (5) carbonization and activation: under the state of N2 protection, temperature is raised for carbonization so as to increase the CMS surface area; and (6) carbon precipitation and hole adjustment: the hole adjustment agent is decomposed in the carbon molecular sieve for carbon deposition, the particle diameter is shortened and is enabled to be uniform, and the carbon molecular sieve product can be obtained after cooling. The carbon molecular sieve has the advantages of high CH4 adsorbing capacity, high selectivity factor of adsorption, favorable strength, low cost and no pollution, and the performance achieves or surpasses the standard of a sample of Japan carbon molecular sieve.

The invention provides a method for preparing activated carbon powder with lignin from an alkaline papermaking black liquor. The method comprises the steps as follows: the lignin is extracted from the alkaline papermaking black liquor through acidification and is prepared after being purified; KOH (potassium hydroxide) is added after the lignin is carbonized; the mixture is placed in an ultrasonic water bath to be subjected to ultrasonic treatment for 30 to 35 min; and after being dried, the mixture of the lignin and the potassium hydroxide is heated and activated for 0.5 to 2.0 hours at 650 to 850 DEG C, so as to prepare the activated carbon powder. The method has the advantages that the process is simple; waste utilization is realized; and the prepared activated carbon powder has the effects of large specific surface area, high porosity, strong adsorption effect and excellent properties and can effectively remove heavy metals and organic pollutants.

The invention provides a method for preparing activated carbon by utilizing direct coal liquefaction residue as a raw material. The method includes the steps as follows: (1) adding smashed direct coal liquefaction residue together with KNO3, KOH and absolute alcohol into water, stirring to be uniform under room temperature, and later drying the obtained mixture to obtain a dry material; (2) placing the prepared dry material in a carbonization furnace, conducting preoxidation in the atmosphere of air, conducting carbonization-activation in the atmosphere of inertia gas, and then obtaining coarse activated carbon; and (3) acid-washing and deashing the prepared coarse activated carbon to obtain finished activated carbon. The method is simple in preparation process route, uses conventional equipment and has universality to the raw material. The obtained activated carbon has not only characteristics of high specific surface area, developed micropores and low ash content, but also controllable output, higher productivity, suitability for production in batches, and better technological and economic benefits.

The invention relates to a methjod for preparing activated charcoal with high specific surface area by using petroleum tar. It comprises following steps: disintegrating petroleum tar into grits # 80; immersing raw material into oxide medium for complete contact, oxidizing; mixing with alkali, activating in inert atmosphere, washing and getting said product. The specific surface area of got product is over 2000 m2 / g, the micropore volume is 1.2-2.1 cm3 / g, bore diameter is about 1 nm, the adsorbility is good, the alkali consumption is greatly reduced compared with current technology, the activating temperature is low and ratio of performance and cost is high.

The invention discloses a biomass powdered activated carbon prepared from lychee seeds and a preparation method thereof. The prepared activated carbon has the specific surface area (SBET) of 1350-2450m<2> / g, the micropore specific surface area > of 97%, the pore volume (P / P0=0.95) of 0.62-1.16cm<3> / g, the micropore volume fraction > of 95%, the granularity of 2300-4500 meshes, the iodine value of 845-1545mg / g, the methylene blue adsorption value of 10.12-21.3Ml / 0.1g, the ash content of less than or equal to 0.15% and the resistance of 0.3-0.6 ohm. The lychee seeds are agricultural fruit crop wastes which are not effectively utilized at present and are sufficient in source, and other raw materials, equipment and the like used in the preparation process are used as usual and can be purchased on the market, so that the production cost of the activated carbon is effectively reduced.

The invention relates to a method for preparing activated carbon from camellia seed waste residues. The method comprises the following steps: by adopting a chemical activation method, enabling camellia seed waste residue particles to be subjected to pyrolysis in an inertia atmosphere; infusing carbonizing materials subjected to pyrolysis into an activating agent, uniformly stirring, and drying after infusion for a period at normal temperature; carrying out activation, washing and stoving in the inertia atmosphere, and then obtaining the activated carbon prepared by the camellia seed waste residues as raw materials. According to the invention, the prepared activated carbon is low in ash content, high in specific surface area, excellent in adsorptive property, stable in product quality and high in product performance-price ratio, and has a plenty of micropores and mesopores; when the method is adopted to prepare the activated carbon on a large scale, pyrolysis gas generated in the pyrolysis carbonizing phase can be used in the stoving process of the late stage of the activated carbon preparation; the preparation method and process conform to the principle of environment-friendly and resource-efficient utilization of wastes at present; the prepared activated carbon can be used for decolorization, purification and solvent recovery in the chemical industry, as well as gas absorption, separation, purification and the like in the environmental protection field.

The invention provides a hard carbon material for an anode of a sodium-ion battery, a preparation method of the hard carbon material and the related sodium-ion battery, and belongs to the technical field of energy storage materials and electrochemistry. The hard carbon material is synthesized from a biomass material as a precursor, compared with the traditional high-temperature carbonization process, the preparation method adopts process steps of alkaline washing, acid pickling, drying, pre-carbonization and pyrolysis, and the hard carbon material having larger interlayer spacing (not smallerthan 0.37 nm), smaller specific surface area (about 100 cm<3> / g) and rich micropores and mesopores is prepared by adjusting process parameters. By means of a special microstructure, the hard carbon material serving as the anode of the sodium-ion battery shows excellent electrochemical performance, high specific capacity, high coulombic efficiency and good cyclic stability. A novel concept is provided for preparing a sodium-ion anode material, and the preparation method is simple and has low preparation cost, high repeatability and small industrialization difficulty, and the hard carbon material is expected to be applied to sodium-ion batteries for realizing large-scale industrial production.

The invention relates to a bimetal organic framework material adsorbent applied to methane / nitrogen separation and a preparation method thereof. The bimetal organic framework material adsorbent is a compound with super-molecular porous network structure, wherein the compound is formed by coordinating two metal ions with an organic ligand HCOOH under the action of an adjusting agent; at least one of the two metal ions is Ni(II); the coordination conditions of different metals are controlled by adjusting complexation of Ni(II) to obtain several bimetal organic framework materials with different metal ratios. The prepared adsorbent has rich micro-porous structures; the purpose of adjusting pore properties microscopically is achieved; the NH4 / N2 separation effect is excellent; the material is simple to prepare and low in cost, and is extremely applicable to development and recycling of low-quality methane separated under low pressure.

The invention relates to an integrated control method for simultaneously removing respirable particle substances and heavy metal in fire coal. The integrated control method is characterized in that fly ash residual carbon having good adsorption effect on the heavy metal is sprayed in the front end of a bag type filter to remove heavy metal mercury in fire coal flue gas; meanwhile, ferrum series oxides with catalysis are sprayed in lime and the fly ash to remove sulfur oxide, and the like in the fire coal flue gas in a fluid bed reactor; filter materials of the bag filter are made of carbon-doped fibers and can effectively remove the heavy metal mercury in the fire coal flue gas for the second time, thereby achieving the aim for simultaneously removing the respirable particle substances and the heavy metal in the fire coal flue gas. The method can remove PM2.5 level, particularly finer micrometer and nanometer respirable particle substances with the removal rate up to more than 98 percent, and can remarkably control the emission of the heavy metal mercury in the fire coal flue gas; the integrated control process is simple in operation, safe in running, remarkable in environment benefit, small in occupied area of the device and low in process cost.

The invention relates to a PAN (Polyacrylonitrile)-based porous carbon nanofiber for removing NOx from air. The PAN-based porous carbon nanofiber has the diameter range of 50-1000 nm, the specific surface area of 200-1200 m<2> / g, a micropore-based porous structure and the micropore volume of 0.3-1.0 cm<3> / g. The PAN-based porous carbon nanofiber can remove the low-concentration NOx from air at room temperature through flowing air containing the low-concentration NOx through the PAN-based porous carbon nanofiber, wherein the low-concentration NOx means the concentration, less than 50 ppm, of NO in air, and in order to ensure a removal effect, the flow velocity of the air containing the low-concentration NOx is 100-400 SCCM, and the reaction temperature is the room temperature. The invention further provides a preparation method of the PAN-based porous carbon nanofiber, and the preparation method is simple and controllable in process.

The invention provides a method for preparing modified activated carbon from coffee residues. The method includes soaking raw materials, namely, the coffee residues, in sodium hydroxide solution at first; carbonizing the coffee residues at the high temperatures to increase the specific surface areas of the coffee residues, spraying potassium chloride solution on the coffee residues, activating the coffee residues at the high temperatures again and keeping the temperatures of the coffee residues constant; activating the coffee residues by the aid of water vapor, spraying iron sulfate solution on the coffee residues and carrying out activating treatment on the coffee residues; adding silane coupling agents into the coffee residues and grinding and smashing the silane coupling agents and the coffee residues; adding potassium ferrate, diatomaceous earth and MnO2 into the coffee residues, sufficiently grinding the potassium ferrate, the diatomaceous earth, the MnO2 and the coffee residues and sufficiently mixing the potassium ferrate, the diatomaceous earth, the MnO2 and the coffee residues with one another to obtain mixtures; calcining and cooling the mixtures to obtain the modified activated carbon which is a final product. The method has the advantages that the modified activated carbon has abundant micropores, the micropores are slightly larger than harmful gas, the specific surface area of the modified activated carbon is larger than 3000 square meters / gram, the modified activated carbon is high in efficiency and adsorption capacity for toxic and harmful gas such as benzene, formaldehyde and ammonia gas, gaseous pollutants and harmful repugnant substances in indoor air can be effectively removed, purposes of reducing pollution and purifying the air can be achieved, and increase of the formaldehyde in the indoor air can be effectively inhibited.

The invention provides a preparation method of a melamine resin modified nitrogen-rich porous carbon fiber electrode material and relates to the technical field of production of functional materials. Melamine resin is synthesized by melamine and formaldehyde; polyacrylonitrile is dissolved in N,N-dimethyl formamide, and then the melamine resin is added to prepare a spinning solution; MF / PAN composite precursor fiber is prepared through electrostatic spinning; the MF / PAN composite precursor fiber is subjected to preoxidation, carbonization and other heat treatment to obtain nitrogen-rich carbon fiber; the NCNF is made into a super capacitor electrode. The problem that existing carbon fiber nitrogen doping and pore formation needs to be performed in a step-by-step mode, a production process is complicated and the cost is higher is solved.

The invention relates to a catalyst used for removing flue gas NOx at low temperature. The weight percentage of each component is: 90.0 to 99.0 percent of active carbon fiber and 0.1 to 10.0 percent of V2O5. The active carbon fiber is dipped into a mixed solution prepared by oxalic acid and ammonium metavanadate which contains V2O5 and has a concentration of 0.000088735 to 0.0088735g / ml, then is stood for 2 to 5h under the room temperature, dried for 2 to 12h under a temperature of 40 to 60 DEG C, dried for 2 to 6h under a temperature of 100 to 120 DEG C, then is calcined for 2 to 8h in an argon atmosphere at 400 to 500 DEG C and is calcined for 2 to 5h in air of 200 to 260 DEG C to obtain the catalyst. The invention is simple to be operated, has excellent poisoning capacities of H2O resistance and SO2 resistance and improves the activity of selectively catalyzing and reducing the NOx.

The invention relates to a method of preparing carbon molecular sieve by petroleum coke intercalation treatment, firstly precrushing petroleum coke, then adopting oxidiant and intercalator to make dipping oxidizing and intercalating expanding treatments on raw materials, further finly crushing the sample, then adding in a proper amount of adhesive agent, bonding assistant and water to knead uniformly, moulding the kneaded matter, drying and carbonizing the moulded matter, controlling physical activation and carbon deposition hole regulating treatments according to the requirements, and obtaining the carbon molecular sieve. And it has beneficial effects of: high product intensity, rich micropores, and narrow aperture distribution, and the product can be used to make nitrogen by air separation with PSA process, and enrich methane in gas or natural gas.

The invention provides a preparation method of a modified Beta molecular sieve catalyst, belonging to the technical field of catalysts. The preparation method comprises the steps of preparing Beta molecular sieve raw powder, preparing a Mn-Co-Beta molecular sieve, and preparing a Sn modified Mn-Co-Beta molecular sieve, wherein the mole ratio of Mn to Co is (5-8) to 1, Mn accounts for 10%-13% of the mass of the Mn-Co-Beta molecular sieve, and the mole ratio of Sn to manganese is 1 to (35-40). The catalyst prepared by virtue of the preparation method can be applied to an automobile tail gas low-temperature SCR denitration system and has relatively good CO2 and SO2 poisoning resistance in the premise that a relatively good temperature operation window is maintained, so that the relatively good catalytic activity is guaranteed.

The invention relates to a compound porous support and a preparation method, in particular to a calcium sulfate and freeze-dried bone compound porous support and the preparation method, belonging to the medical instrument technical field. The compound sizing agent of the half water calcium sulfate powder and the mashed freezing person homogeneous allograft bone is made; after the calcium sulfate sizing agent is evenly painted on polyurethane foam, the calcium sulfate ceramic porous support is obtained through the drying and the high-temperature treatment; after immersed in the compound sizing agent to get coating, the calcium sulfate ceramic porous support is positioned in the inner door environment for being dried naturally; then after heating and drying, the invention is produced.

The invention relates to a preparing method of a microporous carbon fiber with high specific surface area. The preparing method comprises the steps of adding thermosetting phenolic resin, polyvinyl butyral (PVB) and a pore-forming agent into ethyl alcohol to be subjected to blending to prepare an organic fiber precursor for electrostatic spinning, then after the technologies of electrostatic spinning, curing, carbonization and the like, and the microporous carbon fiber with high specific surface area is obtained. The preparing method of the microporous carbon fiber with high specific surface area is simple in technology, rich in micropore and environmentally friendly, and saves energy.

The invention relates to a composite porous scaffold and a preparation method thereof, in particular to a composite porous scaffold combining calcium sulfate and apatite compound and a preparation method thereof, and pertains to the technical field of medical apparatus and instruments. Composite sizing material combining calcium sulfate hemihydrate powder and crushed apatite compound is first prepared; calcium sulfate sizing material is evenly brushed on polyurethane foam to obtain a porous calcium sulfate ceramic scaffold after the steps of drying and high-temperature treatment. The obtained porous calcium sulfate ceramic scaffold is then immersed in the composite sizing material and then placed indoors for natural drying after the treatment of sizing hanging and finally heated and dried to obtain the composite porous scaffold combining calcium sulfate and apatite compound of the invention.

The invention discloses deciduous leaf activated carbon which is obtained by pulverizing deciduous leaves, impregnating in phosphoric acid, carbonizing in a carbonization furnace, activating, washing with acid, washing with water, and drying. The deciduous leaf activated carbon has a well-developed gap structure, a large internal specific surface area, stable properties, and high adsorption capacity. The deciduous leaf activated carbon has an iodine absorption value of 1853-1873 mg / g, a methylene blue adsorption value of 606-621 mg / g and a specific surface area of 1628.5-1645.3 m2 / g; and the deciduous leaf activated carbon can be used for decolorization, military gas masks, cigarette filters, air purifiers, water plant water treatment, drinking water purification, detoxification, control of radioactive element pollution, reduction of soil pesticide residues, conditioning of soil properties, control of indoor formaldehyde, preservation of vegetables and the like, thereby having very strong practicality.

The invention discloses a kieselguhr template carbon with large specific surface area and high pore volume, and a preparation method of the kieselguhr template carbon. The method comprises the following steps in sequence: carbonizing kieselguhr to obtain a kieselguhr-carbon complex with the template contained; transferring the kieselguhr-carbon complex with the template contained into the atmosphere of steam or carbon dioxide; heating to 700 to 900 DEG C; fully roasting for 1 to 3 hours; crushing to obtain the activated solid; removing the template from the activated solid; and washing and drying to obtain the kieselguhr template carbon with large specific surface area and high pore volume. The kieselguhr template carbon with large specific surface area and high pore volume, prepared by the preparation method disclosed by the invention, is outstanding in properties and methylene blue adsorption capacity, can be widely applied to the fields such as the adsorption field, the separation field, the load field and the capacitor preparation field, and is wide in the application prospect. The method has the advantages of being low in cost, simple in process, high in efficiency, less in pollution, and low in energy consumption.

The invention discloses a method for preparing activated carbon from tree leaves. The method comprises the following steps: after abandoned tree leaves are dried and crushed, fully impregnating the crushed tree leaves in impregnation liquid, and carrying out suction filtration; after tree leaf particles subjected to activating treatment are dehydrated, adding a right amount of barium nitrate and magnesium nitrate into the tree leaf particles, and uniformly mixing to obtain a mixture; placing the obtained mixture in a carbonizing furnace so as to carbonize the mixture through heating; carrying out treatment on the obtained carbonized material by sequentially using a salpeter solution and a sodium hydroxide solution, and then washing the carbonized material by using distilled water until the pH value of the carbonized material is 6.8-7.2; and after the washed carbonized material is boiled by using distilled water, washing the carbonized material, then drying the obtained product until the carbonized material is at a constant weight, carrying out microwave irradiation treatment on the obtained product under the protection of high-purity nitrogen, and cooling the obtained product to room temperature, thereby obtaining a finished product. The preparation method disclosed by the invention is simple, and low in cost, and belongs to the utilization of wastes; According to the method, the tree leaves are used for replacing timbers to prepare the activated carbon, therefore, the method has an important practical significance to the resource utilization of abandoned tree leaves and the protection of forests; the prepared activated carbon is rich in micropores, large in specific surface area, and high in adsorption capacity.

The invention discloses a method for improving the photocatalytic activity of bismuth tungstate through an excessive Bi source. Through adjusting the raw material mole ratio of Bi (NO3) 3.5 H2O and Na2WO4.2 H2O, a series of photocatalysts with different mole ratios of Bi / W are prepared by using a simple hydrothermal method implemented without any organic molecule additives, and the performances of the photocatalysts on playing a catalytic oxidation role on dye rhodamine B under simulated sunlight irradiation are studied. Results show that when the Bi source is excessive, the performances of the photocatalysts are improved at different levels; and X-ray diffraction results show that when the Bi source is excessive, besides a Bi2WO6 matrix, trace bismuth subnitrate Bi6O6 (OH) 3 (NO3) 3.1.5 H2O also can be obtained, and the appearance of a sample is integrally of a sheet hypersphere structure, but the rigidity and the assembling density of a sheet layer are higher than those of pure Bi2WO6, and the thickness of the sheet layer is obviously thinner than that of the Bi2WO6 by 15-30nm. Fluorescence tests show that the recombination probability of a photon-generated carrier of a sample with the excessive Bi source is really and effectively inhibited.

A method for preparing activated carbon with high adsorption activity by using petroleum coke as a raw material comprises the following steps: pulverizing the petroleum coke raw material into 81-150 mesh powder, and degassing in a 220-350 DEG C vacuum dryer to obtain a product A with a certain initial pore space; preparing an alkaline medium solution with a molar concentration of 0.2-0.5N, adding the product A into the alkaline medium solution, adding a cosolvent, mixing uniformly, and allowing carbonization and alkaline activation treatment at 700-800 DEG C under inert gas atmosphere for 1-3 hours to obtain a product B; and cooling the product B, washing and drying to obtain the final product. The inventive method has the following advantages that: the activated carbon prepared by using the method has rich micro-pores and has BET specific surface area of 2,500-3,000m<2> / g; the petroleum coke has a certain initial pore space and can mix and sufficiently contact with the alkaline medium solution, so as to reduce the consumption of the alkaline medium, reduce cost, reduce pollution, and unify reaction; and the activation rate and the yield are high, and the product quality is stable.

The invention provides a boron / nitrogen double-doped porous carbon nanosheet and a lithium-sulfur battery positive electrode material thereof. According to the technical scheme, urea, boric acid and polyethylene glycol serve as raw materials, the boron / nitrogen double-doped porous carbon nanosheet is prepared through high-temperature carbonization, and the prepared boron / nitrogen double-doped porous carbon nanosheet is of a graphene-like two-dimensional sheet structure and has a high specific surface area and rich micropores and mesopores; on the basis, the boron / nitrogen double-doped porous carbon nanosheet is used as a carrier, and the positive electrode materials with different sulfur contents are prepared by a melt diffusion method. In the lithium-sulfur battery positive electrode material provided in the invention, the unique two-dimensional structure of the boron / nitrogen double-doped porous carbon nanosheet is beneficial to promoting rapid transfer of electrons and relieving volume expansion of a sulfur electrode, and boron / nitrogen doped atoms have a relatively strong Lewis acid-base effect on lithium polysulfide, so that the shuttle effect of the electrode can be effectively inhibited, and relatively high specific capacity and excellent cycle performance are shown.

The invention discloses banana tree base activated carbon and a preparation method of the banana tree base activated carbon. The preparation method of the activated carbon comprises the following steps of: taking banana tree as a raw material, and treating banana tree by a microwave radiation process and a chemical activation process, so that the banana tree base activated carbon which is multiple in micropores, high in specific surface area and high in adsorption ability can be obtained, and can be taken as high-performance activated carbon adsorbent. The banana tree base activated carbon belongs to the waste utilization of agricultural and sideline products, and is good for the environment protection. After the invention is used, the abundant carbon resources of the special industrial waste material can be abundantly used, the environment pollution caused by the special industrial waste material can be avoided, and the sources channel of the high-performance activated carbon production raw material in China can be widened; and the added value of the banana industry can be effectively improved, and the banana tree base activated carbon is considerable in economic benefit and social benefit.

The invention discloses a method for preparing magnetic biochar from sludge. The method includes the following steps of adding a ferric salt solution and an alkaline solution to the sludge to preprocess the sludge, drying the preprocessed sludge to reduce the water content in the sludge, and conducting pyrolysis treatment on the dried sludge to obtain the magnetic biochar, wherein the pyrolysis treatment temperature is higher than 650 DEG C. By means of the method for preparing the magnetic biochar from the sludge, the ferric salt solution and the alkaline solution are introduced into the sludge preprocessing stage, then drying and pyrolysis are conducted to directly generate the magnetic biochar, and the magnetic biochar is easy and convenient to prepare. Due to the high pyrolysis temperature, the micro-pores in activated carbon can be further enriched in the pyrolysis process, the porosity of the biochar is increased, and the adsorption performance of the biochar is improved.

The invention discloses an imbibition agent applied to low-permeability reservoir imbibition oil recovery, and aims to overcome the defects of an existing surfactant imbibition agent. The imbibition agent is organochlorosilane modified nano-SiO2. The invention further provides a method for preparing the imbibition agent. The organochlorosilane modified nano-SiO2 has a great number of hydrophilic hydroxyl functional group, and also has partial oleophilic organic functional group. The organochlorosilane modified nano-SiO2 is adsorbed to an oil wet surface to generate wettability alteration to reach a reservoir stratum, so that the aim of changing the wettability of the reservoir stratum can be achieved. Furthermore, the organochlorosilane modified SiO2 can exist on an oil-water interface to change the property of crude oil, so that the fluidity and imbibition efficiency of crude oil can be improved. The modified nano-SiO2 is low in cost and wide in source, has a relatively good effect for modifying the interface of the reservoir stratum, can be widely applied to the field of triple oil recovery, and has an excellent application prospect.

The invention discloses a solvent-free method of preparing a Co-MOF material based on a cobalt-containing double metal oxide. The method comprises the following steps of: grinding and mixing the cobalt-containing double metal oxide with a ligand compound; putting the mixture in a sealing kettle; and performing a reaction at 80-300 DEG C in the sealing kettle to obtain the Co-MOF material which is large in specific surface and has mesopores and micropores at the same time. The method is simple to operate, short in period and high in yield, provides a novel MOF material preparation path, and greatly lowers the production cost of the MOF material, so that industrial production is facilitated.

The invention discloses high-efficient water-purifying activated carbon and a preparation method thereof. The high-efficient water-purifying activated carbon is prepared from the following raw materials in parts by weight: 60 to 80 parts of activated carbon, 20 to 40 parts of modified diatomite, 15 to 25 parts of zeolite, 10 to 30 parts of kaolin, 5 to 10 parts of alum powder, 3 to 8 parts of montmorillonite, 5 to 15 parts of sepiolite powder, 3 to 6 parts of calcium carbonate powder, 4 to 10 parts of binding agent and 30 to 50 parts of deionized water. The preparation method of the high-efficient water-purifying activated carbon comprises the following steps: (1) a pre-treatment process; (2) a carbonization process; (3) an activation process. The high-efficient water-purifying activated carbon disclosed by the invention has the advantages of high mechanical strength, good adsorption capability, good water purification effect and the like; therefore, the activated carbon is desired water-purifying activated carbon, and is suitable for being massively promoted and used.

The invention provides a technique for preparing a cotton grass active carbon. The preparation method is that: cut a spadix from a cattail, remove cattail wool from the inflorescence and dry the cattail wool at the temperature of 120 DEG C to get rid of moisture, then soak the cattail wool in a phosphoric acid with the concentration of 25-30 percent according to the weight ratio of 1:1.6-1:2.0; then the cattail wool is heated with water bath at the temperature of 60-80 DEG C and steeped for 30-50 minutes; place the cattail wool in a muffle furnace or a carbonization oven and raise the temperature to 260-300 DEG C for carrying out carbonizing activation for 40-80 minutes, then stop heating operation and take out the cattail wool after being kept for 2 hours in the oven; wash the cattail wool with a 80-100 DEG C distilled water or deionized water until the PH value reaches 6.5-7.0 and finally dry the cattail wool. The invention adopts a chemical process to produce cattail wool active carbon fiber, the production process is simple, the production speed is high and the production cost is low, furthermore, the fiber texture is not damaged and the cattail wool active carbon fiber with great adsorption capacity (2-4 times higher than an ordinary active carbon), large specific area, rich micropores and high mechanical strength can be obtained.