79results about How to "Large saturated adsorption capacity" patented technology

The invention relates to preparation and application of a lignin or an aminolignin-modified magnetic nano-adsorbent. The magnetic nano-adsorbent is obtained by a one-step conversion of lignin and a raw material iron salt by a modified chemical coprecipitation method. The main method is to prepare surface-modified magnetic nanoparticles by dissolving lignin or amino-modified lignin in an alkaline precipitant and using the alkaline precipitant for coprecipitation. The synthesized magnetic nano-adsorbent has adsorption capacity for both anionic dyes and cationic dyes. Compared with other lignin-based adsorbents, the adsorption capacity is increased by about 2 to 5 times. At the same time, desorption can be achieved by adjusting of the pH, so that the adsorbent is recycled, and the dyes can berecovered. Lignin raw materials used in the adsorbent are industrial and agricultural waste materials, the materials are rich and low in price, the synthesis method is simple and efficient, and the adsorbent is economical and environmentally friendly, and has good application prospects.

The invention discloses a method for recovering rhenium from molybdenum smelting waste acid and belongs to the technical field of metal rhenium recovery and recycle. The method comprises 1, filtering molybdenum smelting waste acid, and treating the filtrate by a composite aminoethylene weak basic anion exchange resin column for adsorption until adsorption is saturated, and 2, carrying out desorption on the saturated anion exchange resin column, collecting the desorption liquid and carrying out evaporation crystallization to obtain ammonium perrhenate. The composite aminoethylene weak basic anion exchange resin has large saturation adsorption quantity. The desorption liquid has rhenium content 100 times or more that of waste acid. Compared with the existing extraction method and ion exchange method, the method provided by the invention has a high rhenium recovery rate of 98% or more. Through use of solubility difference of ammonium perrhenate, ammonium molybdate and ammonium sulfate, ammonium perrhenate is purified by evaporation crystallization and ammonium perrhenate purity is 99.9% or more. The method has a simple rhenium recovery process, is environmentally friendly, is convenient for operation and is suitable for large scale production.

The invention discloses a modified polypropylene non-woven fabric, its preparation method and application. The preparation method comprises: impregnating a polypropylene non-woven fabric in a grafting solution containing a graft monomer, a crosslinking agent, a non-ionic surfactant and a photosensitizer, and initiating graft polymerization under ultraviolet irradiation, thus obtaining the modified polypropylene non-woven fabric, which can be widely used in adsorption separation treatments of dye wastewater, heavy metal ion wastewater, inorganic anion acid radical-containing chemical wastewater and the like as a filtering material. The modified polypropylene non-woven fabric provided by the invention has the characteristics of high mechanical strength, large water flux, and great saturated adsorption capacity. Meanwhile, after being subjected to a regeneration treatment in a cationic surfactant-containing ethanol solvent desorption solution, the adsorbed filtering material can be recycled.

The invention discloses an amino-functional ordered mesoporous carbon material and a preparation method and application thereof. The preparation method comprises the steps of carrying out concentrated nitric acid oxidation treatment on the ordered mesoporous carbon synthesized by soft template lines, and preparing the amino-functional ordered mesoporous carbon material under the action of a silane coupling agent. Through wet oxidation on the ordered mesoporous carbon, the concentration of hydroxyl groups in an ordered mesoporous carbon duct is remarkably improved. Through the organic silane coupling agent, silane groups containing amino can be uniformly grafted into the duct of ordered mesoporous carbon with ordered height and uniform pore size distribution. The technical problem that functional groups cannot be grafted directly caused by hydrophobicity and surface inertness of the ordered mesoporous carbon material is solved. Applied to Cr (VI) in an adsorption aqueous solution, the material has the advantages of being convenient to apply, and high in adsorption rate and adsorption volume.

The invention relates to a method for preparing a biomass absorbing agent capable of absorbing heavy metal ions in waste water efficiently and belongs to the fields of material preparation and waste water treatment. The method is characterized by comprising the steps of treating rice straw which is low in price and easy to obtain as raw materials, and conducting washing, drying, pulverization and screening. Firstly, the pretreatment is conducted through an acidic hydrogen peroxide solution, the method of conducting the heating and stirring in water bath is adopted for reaction, and the rice straw is filtered, washed to be neutral and dried. Then phosphoric acid or disodium hydrogen phosphate serves as the modifying agent, the straw which is obtained after the pretreatment is heated and stirred for reaction, after the reaction is ended, the straw is filtered, washed to be neutral and dried, and the needed heavy metal ion absorbing agent is obtained. The method has the advantages of being simple in preparation method, low in cost, free of secondary pollution and the like.

The invention relates to a preparation method of a kind of modified silicon gel absorbing agent used for protecting on-vehicle fuel batteries, which belongs to the branch of the non-metallic inorganic material technology and is applied to the field of gas absorption and separation. The preparation method uses 3-aminopropyl triethoxysilane as amino modifying agents, uses tetraethoxy silane as silicon gel precursors, and prepares and obtains modified silicon gel with uniformly decorated amino groups in a porous silicon gel framework through adding a certain number of amino modifying agents in the gel forming stage. The absorbing agent can be used for removing a trace amount of sulfur dioxide in the air, so cathodic catalysts of on-vehicle proton exchange membrane fuel batteries are protected from the poisoning effect of the sulfur dioxide. Compared with the prior art, the invention has the following advantages that: (1) the obtained absorbing agent has better capability for absorbing the trace amount of sulfur dioxide than active carbon fiber, the effect is shown through longer penetrating time and larger saturation adsorption capacity, in addition, the absorbing agent still has good absorbing capability when the humidity is lower; and (2) the obtained absorbing agent has simple and convenient preparation method, the operation is easy, the condition is mild, and the effects of energy saving and environment protection can be obtained.

The invention discloses hollow structure biomass activated carbon fiber and a preparation method thereof. Metaplexis japonica seed hair fiber with a hollow structure is adopted as an activated carbonfiber precursor, and wax removal, phosphoric acid activation, low-temperature pre-oxidation and high-temperature carbonization are performed to prepare the hollow structure biomass activated carbon fiber with the high hollow structure; the prepared hollow structure biomass activated carbon fiber has the characteristics of light weight and double surfaces of an inner layer and an outer layer; compared with solid fiber, the specific surface area is significantly increased; by performance testing, the hollow structure biomass activated carbon fiber prepared with the method has the specific surface area which reaches up to 1,882.003 m<2>/cm<3> and the average pore diameter being 3.056 nm, and has developed mesoporous distribution; and an XRD result shows that a graphite-like microcrystalline refined structure appears in the biomass activated carbon fiber.

The invention relates to a series of nano-particle water purification materials, which take quartz sand or zeolite particle as a substrate, nanometer aluminum (iron) oxide or nanometer aluminum (iron) oxidized hydrogen oxide as a modified filtration coating, and can effectively and completely remove bacilli and virus from wastewater and sewage. The invention also relates to a preparation method of the nano-particle water purification materials. In the preparation method, acidic solution with 40 to100 meshes of quartz sand or 60 to120 meshes of clinoptilolite is poured into secondary deionized water, uniformly mixed and heated, nano-aluminum powder, aluminum nitride powder or iron powder is poured into the acidic solution and ultrasonically mixed and ethanol solution of ester is then poured into the mixed acidic solution, ultrasonically mixed again, filtrated and dried so as to gain nano-fibriform AlO(OH) or FeOOH which is the particle water purification materials of filtration coating which are further roasted so as to gain Gamma-Al2O3 or Fe2O3 which is the particle water purification materials of filtration coating. The nano-particle water purification materials of the invention have the advantages of strong removal ability, high cleanliness, great saturated adsorption capacity, etc.

The present invention discloses a manufacture and use method for an indoor organic polluting gas purificant. The method comprises the following steps: (1) waste pericarps and other vegetable cutins are collected, and residual pulps and other sundries are removed to get natural vegetable cutins and biological polymers; (2) the vegetable cutins are dried, crushed and filtered with a sieve of 10 to 200 eyes; (3) hydrochloric acid with the concentration of 0.5-6mol/l is added; then after the vegetable cutins with the hydrochloric acid are heated in a water bath for 0.5 to 6 hours, the cutins are flushed with water to be neutral, and a green purificant is got; (4) the green purificant is used absorb and treat organic pollutants in the indoor air; after the purificant is saturated, the purificant is heated under the temperature of 70 to 100 centigrade degrees for 0.5 to 2 hours to be regenerated and recycled. The purificant manufactured with the present invention is provided with the rapid and highly-efficient performance of absorbing the indoor organic pollutants. The absorption capacity reaches as high as 2.0g/g. Moreover, the purificant is free of the temperature, the humidity and co-existing organic pollutants and in particular applicable for purification of indoor compound pollutants. The purificant is cheap and easily obtainable, and can be recycled and regenerated.

The invention discloses a desulfurization wastewater dechlorination treatment method and desulfurization wastewater treatment equipment. The method comprises the following steps: A, firstly, adding anacid into the desulfurization wastewater to adjust the pH value to 0.5-4, and then stirring and mixing with a liquid resin; B, separating an obtained mixture in a separation chamber; C, enabling theseparated liquid resin to enter a liquid resin buffer tank, and enabling separated desulfurization wastewater to enter a next-stage reactor for further treatment; and D, repeating the steps A, B and Cin the treatment process, removing the liquid resin dissolved in the water in an air floatation oil removal device, taking the desulfurization wastewater treated through air floatation treatment andpH adjustment as reuse water, and conveying the liquid resin brought out by bubble floatation into the liquid resin buffer tank. The method has the advantages that the equipment investment is small, the operation cost is low, the produced water after chloride ion removal can meet the industrial water recycling requirement, no waste is generated in the treatment process, real-time adsorption and real-time regeneration are achieved in the reaction process, 100% removal of chloride ions can be achieved, the whole process is continuously operated, waiting and time delay are not needed, and the production efficiency is high.

The invention provides a method for preparing a needle-sized nanometer iron oxide adsorbent. The method comprises the following steps: respectively dissolving inorganic iron salt and urea in a mixtureof glycerol and deionized water to obtain a mixed solution; stirring the mixed solution, ultrasonically dissolving the mixed solution, then transferring the material to a high-pressure reaction vessel with a polytetrafluoroethylene liner for a solvothermal reaction to form a precipitated product in the reaction vessel; and performing steps of washing centrifugation and drying to obtain the needle-sized nanometer iron oxide adsorbent. The needle-sized nanometer iron oxide adsorbent prepared by the invention has stable performance, has good adsorption capacity for anionic dyes such as Congo red, and can be used for efficiently treating the pollution problem of the organic pollutant Congo red in the water body; the organic solvent used in the preparation process is used with a small amount,and the harm to the environment is low; the treatment of the organic dye Congo red-polluted water body does not cause secondary pollution; the method is simple and easy to prepare, the preparation conditions are mild, the raw materials are cheap and easy to acquire, and the process cost is low.

The invention discloses a preparation method and an application of a mesoporous hydroxyl-ferric oxide Cr (VI) adsorbent which can be used for solving the pollution problem of heavy metal Cr (VI) in water. The preparation method of the adsorbent comprises the steps as follows: inorganic iron salt, an amide precipitator and a mesoporous template agent are mixed and dissolved in pure water; the solution is subjected to a hydrothermal reaction after being sealed; a precipitate obtained after the reaction is filtered, washed and dried, and a precursor is obtained; the precursor is calcined and theadsorbent is obtained. The prepared efficient mesoporous hydroxyl-ferric oxide adsorbent has good adsorption capacity for Cr (VI), high saturation adsorption capacity, high adsorption rate and low equilibrium concentration. The raw materials used in the method are cheap, easy to obtain, green and environmentally friendly, the preparation method is simple and adopts mild conditions, and the prepared low-cost adsorbent which has excellent adsorptive performance for highly toxic pollutant Cr (VI) has important scientific significance and good application prospects.

The invention relates to a method for separating halogenated olefin impurities from 2-chloro-1,1,1,2-tetrafluoropropane. The method comprises the following steps: adding the 2-chloro-1,1,1,2-tetrafluoropropane containing the halogenated olefin impurities into an adsorbent and absorbing halogenated olefins; the solid adsorbent is a copper-modified high-silicon ZSM-5 molecular sieve adsorbent. The absorption method adopted by the invention has the advantages that the saturated adsorption quantity is large, the adsorption quantity of the adsorbent for the halogenated olefins reaches 0.8, the content of HCFO-1233xf in absorbed HCFC-244bb is less than 700 ppm, the purity of the HCFC-244bb reaches above 99.6 percent, and the like. In addition, the adsorbent adopted by the invention has the advantage of HF resistance and is suitable for industrial production equipment.

The invention discloses a purification and ventilation system for a sterile workshop. The purification and ventilation system for the sterile workshop comprises a housing, an air inlet port, a first filter device, a sterilization device, an air inducing device, a second filter device and an air outlet device, wherein the first filter device comprises a first filter cavity, an air guide device anda first filter layer; the air guide device comprises a plurality of air guide plates; a plurality of bulges are arranged on each air guide plate; the sterilization device comprises a sterilization cavity, a sterilization pipe and an ultraviolet lamp; the air inducing device comprises an air inducing chamber, an air inducing fan and a heat dissipator; the second filter device comprises a second filter cavity, as well as an aluminum alloy filter screen, a honeycomb activated carbon filter screen and a cold catalyst filter screen which are sequentially arranged in the second filter cavity; and the air outlet device comprises an air outlet port, an air outlet cavity, a negative-ion generator and a micro-fan. The invention provides a purification and ventilation system for a sterile workshop, solves the problems that sterilization and disinfection cannot be carried out on the interior of a workshop, bacteria are easily bred in the workshop, and adverse influence is brought to personnel health and production, in the prior art, and improves the effects of purification, and sterilization and disinfection for the sterile workshop.

The invention relates to a nicotine adsorbent and a preparation method thereof. The nicotine adsorbent is prepared by mixing mordenite raw powder and attapulgite powder in proportion and granulating the mixture. The preparation method comprises steps as follows: mixing of powdery materials: the mordenite raw powder and the attapulgite powder are uniformly added to a stirrer in the weight ratio being 4: (1-1.5) and stirred and mixed for 1.5-2.5 hours in the mixing stirrer; forming and granulation: a plurality of seeds are put in a granulator, the powdery materials are continuously added to the granulator, meanwhile, water mist is sprayed, the seeds grow to be adsorbent granules, and when the adsorbent granules reach predetermined specifications, the granules roll out of a discharge port of the granulator and conveyed to a vibrating sieving machine to be sieved; the water consumption in the whole forming and granulating processes doesn't exceed 35% of the weight of the powdery materials. The nicotine adsorbent has high nicotine adsorption capability, adsorption speed, saturated adsorbing capacity and adsorption rate and can realize thorough adsorption; the preparation method of the adsorbent is simple, convenient and low in production cost.

The invention discloses a method for acquiring isoparaffin from long-carbon-chain mixed n-alkanes and isoparaffin. The method includes steps of absorbing and separating raw materials to be separated through a first absorption separation zone, a second absorption separation zone and a third absorption separation zone, and acquiring isoparaffin, wherein the raw material to be separated is a mixed liquid of n-alkanes and isoparaffin containing 8-22 carbon atoms; the carbon atom intercepted by the first absorption separation zone is 8-14 n-alkanes, the carbon atom intercepted by the second absorption separation zone is 15-18 n-alkanes, and the carbon atom intercepted by the third absorption separation zone is 19-22 n-alkanes. The method has significant absorbing effect, and can completely absorb the of n-alkanes from the complex long-carbon-chain mixed n-alkanes and isoparaffin containing 8-22 carbon atoms, and acquire high-purity isoparaffin; besides, the method is low in cost of absorbing process and easy to realize the industrial production.

The invention relates to a preparation method for a formaldehyde adsorbent, and belongs to the technical field of the air purification. The preparation method comprises the following steps: uniformlymixing a MOR molecular sieve and manganese sulfate water solution, placing in a muffle furnace for roasting, naturally cooling to a room temperature, to obtain MnO2-MOR; placing the prepared MnO2-MORin copper nitrate and performing ion exchange, to obtain a product of the formaldehyde adsorbent. The preparation method is capable of enabling the MnO2 to be placed in pore channels of the MOR molecular sieve by using a method of directly roasting, and substituting sodium ions by copper ions through an ion exchange method, and enabling the copper ions to be placed in the pore channels of the molecular sieve, thereby improving a formaldehyde adsorption rate. Compared with the existing formaldehyde adsorbent, the adsorbent is stronger in formaldehyde adsorption, large in saturation adsorption quantity, complete in adsorption, and simple in preparation process, and secondary release cannot be generated.