19results about How to "Improve adsorption speed" patented technology

The invention discloses an adsorption heat storage material with a multi-stage stepped pore structure and a preparation method of the adsorption heat storage material, according to the material, a metal foam matrix is combined with the multi-stage pore structure, and the storage and release efficiency of heat energy is remarkably improved. Specifically, the metal foam matrix is composed of a plurality of metal foam layers with different porosities, and the porosities are gradually increased in the heat source direction, so that the heat resistance is effectively reduced, and the diffusion of adsorbate is accelerated. The adsorbent coating is coated with an adsorption material mixture containing a template agent, and is subjected to drying and roasting treatment to form a multi-stage pore structure comprising macropores, mesopores and micropores, so that the adsorption diffusion speed and the adsorption capacity are improved. The material not only improves the heat energy storage and energy release capabilities, but also optimizes the diffusion rate of adsorbate. According to the preparation method, through simple and convenient processes such as splicing of the metal foam layer and coating of the adsorbent, the production cost is reduced, the preparation process is efficient and controllable, and wide application prospects are achieved.

The invention discloses a medicinal silica gel desiccant with high adsorption speed and a preparation method thereof, and belongs to the technical field of desiccant preparation. The medicinal silica gel desiccant with high adsorption speed is prepared from the following components in parts by weight: 50-65 parts of silica gel, 4-8 parts of calcium chloride, 3-6 parts of magnesium sulfate, 3-7 parts of ferric oxide, 1-4 parts of an antibacterial compound, 5-10 parts of a modified surfactant, 1-2 parts of potassium hydroxide, 10-30 parts of ice water, 2-4 parts of acrylic acid, 2-4 parts of acrylamide and 0.4-0.8 part of sodium carboxymethyl starch. 0.2 to 0.3 part of benzoin dimethyl ether, 0.005 to 0.015 part of polyethylene glycol diacrylate and 1 to 2 parts of methanol. The silica gel desiccant prepared by the method has excellent antibacterial performance, adsorption rate and adsorption capacity.

Provided is a method for efficiently reducing carbon dioxide in a living space. This method for efficiently reducing carbon dioxide in a living space includes: a step for causing carbon dioxide to be adsorbed to a carbon dioxide adsorbent by bringing the carbon dioxide adsorbent into contact with a gas including moisture and carbon dioxide in a living space; a step for separating carbon dioxide from the carbon dioxide adsorbent by heating the carbon dioxide adsorbent having adsorbed thereto carbon dioxide to 50-900°C; and a step for discharging the separated carbon dioxide to the outside of the living space. The carbon dioxide adsorbent contains: at least one alkali metal carbonate containing an alkali metal; and a metal compound containing at least one element selected from the group consisting of Group 3 elements in the periodic table and Group 4 elements in the periodic table.

The invention relates to the technical field of lithium resource extraction, and provides a composite fiber membrane adsorbent as well as a preparation method and application thereof. The composite fiber membrane adsorbent comprises a polymer fiber membrane and a manganese lithium ion sieve coated carbon material loaded on the polymer fiber membrane. The preparation method of the composite fiber membrane adsorbent comprises the following steps: pre-treating a carbon material in an acid solution to obtain a pre-treated carbon material; a manganese source, a lithium source and a doped metal source are subjected to a hydrothermal reaction and calcined, and a manganese-series lithium ion sieve precursor is obtained; mixing the pretreated carbon material and a manganese-series lithium ion sieve precursor, and calcining to obtain a manganese-series lithium ion sieve precursor coated carbon material; and dispersing the manganese-series lithium ion sieve precursor coated carbon material into a polymer solution, spinning, and pickling to remove lithium to obtain the composite fiber membrane adsorbent. The composite fiber membrane adsorbent not only has high adsorption capacity, but also shows relatively low manganese solution loss, and can adapt to long-time cyclic lithium extraction operation.

The invention belongs to the technical field of biomass utilization, and particularly relates to a process for preparing magnetic charcoal rich in nitrogen / iron oxide through rapid pyrolysis activation and a method for efficiently adsorbing phenol through the magnetic charcoal. The method comprises the following steps: by taking biomass as a raw material, crushing, cleaning and drying, impregnating with a ferric trichloride solution, drying at a low temperature to prepare an iron-containing precursor, and then quickly pyrolyzing in an ammonia gas atmosphere to generate nitrogen / iron oxide-rich magnetic biochar which has a developed pore structure and loaded iron oxide and ferroferric oxide particles. The adsorbent is short in preparation period, low in energy consumption and high in efficiency, and the specific surface area and surface functional group distribution are further improved by optimizing pyrolysis conditions, so that the adsorption rate and capacity of phenol are remarkably enhanced. The prepared iron-nitrogen co-doped biochar is low in cost, efficient and renewable, a new path is provided for organic pollutant treatment, and high-value utilization of biomass waste and economic treatment of water pollution are achieved.

The invention discloses a hollow porous adsorption material and a preparation method and application thereof.A covalent organic framework successfully grows on the surface of a metal organic framework through an in-situ growth method to form a core-shell structure composite material, and then the metal organic framework is etched with acid to prepare the hollow porous adsorption material. The prepared hollow porous adsorption material has good particle size uniformity and has remarkable and efficient adsorption capacity on target pollutants, the adsorption speed and the adsorption capacity are greatly improved due to the hollow structure of the material, and the hollow porous adsorption material can be used for enriching pollutants in food; the hollow porous adsorption material has higher chemical stability and thermal stability, stably exists in various organic solvents, and is suitable for sample pretreatment of complex matrixes.

The utility model discloses a high-precision glass engraving and milling machine, and relates to the field of glass engraving and milling equipment. The laser engraving machine comprises a machine base and a mounting plate, a laser engraving device is detachably connected to the outer surface of the mounting plate, and protection mechanisms are arranged on the two sides of the laser engraving device. The fixing pieces and the mounting plate can be detachably connected through the fixing bolts, the convenient mounting and dismounting functions are provided, the first protection piece is arranged between the two fixing pieces and is a static protection piece, the position of the first protection piece is fixed, the second protection piece is designed to be capable of sliding on the inner side of the first protection piece, and the second protection piece is designed to be capable of sliding on the inner side of the second protection piece. Therefore, an operator can adjust the position of the protection piece according to the position of the carving head, and normal work of the carving head cannot be hindered while necessary protection is provided.

The present application relates to a natural gas pipeline filter and a method of use, and to the technical field of natural gas filtration, which includes a filter box, two filter frames arranged inside the filter box, and a partition plate arranged inside the filter box, wherein a switching component for switching and adjusting the two filter frames is arranged inside the filter box, and the filter frame is used to filter particles and moisture in natural gas; a processing mechanism for detecting, drying and dusting the filter frame is arranged inside the filter box, and the processing mechanism includes a detection component, a drying component and a dust collection component, and an adjustment component for adjusting the drying component and the dust collection component is arranged inside the filter box. The present application has the purpose of achieving automatic cleaning of filter particles, and does not require the user to disassemble and clean the filter at regular intervals, and does not require the natural gas pipeline to suspend the delivery of natural gas in the middle, which saves time and effort and reduces the labor intensity of the user.

The invention provides a zero discharge method of electroplating alkaline wastewater, which comprises the following steps: preliminarily filtering the alkaline wastewater generated by electroplating by using a screen, and adding an acidic solution to adjust the pH value of the wastewater to 7-8; adding a flocculating agent which accounts for 3-5% of the mass of the wastewater, then stirring at the stirring speed of 150-250r / min for 20-30 minutes, and then introducing the wastewater into a sedimentation tank for sedimentation for 2-2.4 hours; then filtering through an ultrafiltration device and a nanofiltration device; feeding the filtered wastewater into an MVR (mechanical vapor recompression) evaporator for evaporative crystallization treatment, discharging crystalline salt in a crystallizer through a scraper conveyor, and condensing at the temperature of 40-50 DEG C to realize zero discharge of the wastewater. According to the zero discharge method for the electroplating alkaline wastewater, harmful substances in the electroplating alkaline wastewater are efficiently separated and converted, and finally zero discharge of the wastewater is achieved.

The application provides a binary ionic liquid fiber membrane, a preparation method and application in adsorption of palladium, and belongs to the technical field of adsorption materials, and comprises the following steps: mixing dichloromethane and acetic acid to obtain a first solution; dissolving cellulose acetate, a first ionic liquid and a second ionic liquid in the first solution to obtain a second solution; the first ionic liquid and the second ionic liquid are alkenyl imidazole salts with different length alkyl side chain molecular structures; adding N,N'-methylene bisacrylamide and benzoyl peroxide into the second solution, heating, stirring and warming to obtain a third solution; performing high-pressure electrospinning on the third solution to obtain a binary ionic liquid fiber membrane; or performing irradiation on the second solution after high-pressure electrospinning to obtain a binary ionic liquid fiber membrane. The binary ionic liquid fiber membrane prepared by the application can efficiently and selectively adsorb and recover palladium from a complex acidic solution, and has the advantages of faster adsorption speed, better selectivity and better salt resistance.

The present invention discloses an ammonia gas-sensitive material and a preparation method and application thereof, and relates to the technical field of gas sensors. The chemical formula of the ammonia gas-sensitive material is Xwt% Ag-SmCo 1‑y Mg y O3, where 0

The invention discloses an ammonia gas sensitive material as well as a preparation method and application thereof, and relates to the technical field of gas sensors. The chemical formula of the ammonia gas sensitive material is Xwt% of Ag-SmCo (1-y) MgyO3, and 0 lt; x < = 20, 0lt; and y < = 0.5. On the basis of a SmCoO3 material through a hydrothermal method, Ag element is adopted to carry out surface loading and modification on the SmCoO3 material, and Mg element is adopted to carry out B-site doping on the SmCoO3 material. Through precious metal and B-site composite doping modification, the prepared ammonia gas sensitive material shows excellent sensitivity in detection of ammonia gas and especially shows good response to low-concentration ammonia gas, specifically, at the working temperature of 150 DEG C, the response value of the prepared ammonia gas sensitive material to 2 ppm of ammonia gas is 7.53, and meanwhile, the response value of the prepared ammonia gas sensitive material to 2 ppm of ammonia gas is 7.53. The catalyst shows good selectivity to ammonia gas and has good long-term stability.

The invention designs a hollow heteroporous adsorption material as well as a preparation method and application thereof, a covalent organic framework material is introduced, a novel composite heteroporous material with a core-shell structure and strong adsorbability and large specific surface area is prepared by adopting an in-situ growth method, and then a hollow structure is obtained by etching the core-shell composite framework material through a sacrifice template method. The material can be used for realizing selective adsorption and efficient enrichment of the phytochrome and purifying a complex sample matrix, so that chemical hazardous substances in the matrix are subjected to non-targeted screening. The prepared hollow special-hole adsorption material has a specific hole diameter and a relatively large specific area, and has remarkable and efficient adsorption capacity on target pollutants, and the adsorption speed and the adsorption capacity are greatly improved due to the hollow structure of the material. Meanwhile, the hollow heteroporous adsorption material has higher chemical stability and thermal stability, stably exists in acidic, alkaline and organic solvents, and is suitable for sample pretreatment of complex matrixes.

The utility model provides a lithium extraction adsorption device with high recovery rate and high selectivity, which comprises an adsorption unit, a cleaning unit, a desorption unit and a heating device, the adsorption unit comprises an original brine inlet pump, the original brine inlet pump is connected with an adsorption valve in series, and the adsorption valve is connected to an ion exchange column through a main pipeline; the cleaning unit comprises a cleaning pump, the cleaning pump is connected with a washing valve in series, and the washing valve is connected to the ion exchange column through a main pipeline; the desorption unit comprises a desorption water inlet pump, the desorption water inlet pump is connected with a desorption valve in series, and the desorption valve is connected to the ion exchange column through a main pipeline. The device has the advantages of high adsorption capacity, high adsorption and desorption speed, simplicity and convenience in operation and the like, and can improve the extraction efficiency of lithium and reduce energy consumption and cost.

The invention discloses a preparation method of water vapor modified chemical capacitance carbon, which comprises the following steps: (1) taking an intermediate of current commercial chemical capacitance carbon, namely activated carbon which is not calcined at a high temperature, as a carbon material, putting the carbon material into a corundum boat, and putting the corundum boat into a tubular furnace; (2) introducing inert gas into the tubular furnace, heating to 250 DEG C at the heating rate of 10-15 DEG C / nim, switching the inert gas into water vapor with the flow of 0.15-0.35 L / min and the constant heating rate, continuously heating to 850-950 DEG C, and keeping the temperature for specified time; and (3) naturally cooling to 750 DEG C, switching to inert gas, continuously cooling to room temperature, and taking out to obtain the modified capacitor carbon. The capacitor carbon modified by the chemical carbon has the properties of the capacitor carbon prepared by a physical method, and the capacitor assembled by the carbon is resistant to high temperature and stable in performance.

This invention discloses a carbon dioxide gas-sensitive material based on praseodymium lanthanum iron cobalt oxide and its application, relating to the field of carbon dioxide gas sensor technology. The chemical formula of the carbon dioxide gas-sensitive material is Pr x La 1‑x Fe 1‑y Co y O3, where 0

The invention discloses a one-step silane crosslinked SEBS-based elastomer and a preparation method thereof. The elastomer is composed of a silane master batch and a catalytic master batch. Wherein the silane master batch is prepared from the following components in parts by weight: 40 to 60 parts of SEBS (Styrene-Ethylene-Butylene-Styrene), 40 to 60 parts of linear low-density polyethylene, 1.5 to 5.0 parts of vinyl silane, 0.03 to 0.25 part of initiator, 20 to 30 parts of processing base oil, 0.5 to 1.0 part of lubricant and 1.0 to 5.0 parts of antioxidant; the catalytic master batch comprises the following components in parts by weight: 99 parts of linear low-density polyethylene, 1 part of SEBS, 1.5-2.5 parts of a catalyst and 2.0 parts of an antioxidant; after the silane master batch and the catalytic master batch are prepared, the silane master batch and the catalytic master batch are packaged according to the proportion of 19: 1, and a finished product is obtained. According to the invention, the one-step rapid, efficient and low-energy-consumption preparation of the silane crosslinked SEBS-based elastomer is realized, the production efficiency is improved, the production cost is reduced, the energy is saved, and the preparation process is greener and lower in carbon.

The invention discloses a novel activated carbon adsorbent and a preparation method and application thereof.The preparation method specifically comprises the following steps that S1, sodium percarbonate is added into water to form a sodium percarbonate solution, activated carbon is placed in the sodium percarbonate solution to react, and activated carbon with micropores in the surface is obtained; s2, drying the moisture of the activated carbon with the micropores in the surface to obtain the dried activated carbon with the micropores; s3, spraying hydrogen peroxide on the dried activated carbon with the micropores to obtain a target object; according to the novel activated carbon adsorbent prepared by adopting the method disclosed by the invention, on the basis of keeping the original activated carbon adsorption capacity and the original activated carbon ash content, the adsorption capacity and the adsorption speed of hydrogen sulfide, carbon tetrachloride and other waste gases are greatly improved, so that the application range of the product can be expanded; the quality and the market competitiveness of the product are also improved; in addition, the method is easy to operate and worthy of being vigorously popularized and used.

The invention discloses a uranium extraction nanofiber membrane assembly as well as a preparation method and application thereof. The preparation method comprises the following steps: (1) fixing sandwich screen cloth on a receiving roller, and depositing polyacrylonitrile nanofibers on the sandwich screen cloth through electrostatic spinning to obtain deposited screen cloth; the thickness of the polyacrylonitrile nanofibers deposited on the sandwich screen cloth is 5-35 microns; the thickness of the sandwich screen cloth is 0.5-2 cm; the sandwich screen cloth is 120-160g / m < 2 >; (2) collecting the deposited screen cloth into a roll by using a winding machine to prepare a winding assembly; (3) immersing the winding assembly into a hydroxylamine solution to obtain an amidoximation assembly; and (4) carrying out alkali treatment on the amidoximation assembly to obtain the uranium extraction nanofiber membrane assembly. By means of the preparation method, the uranium adsorption capacity of the uranium extraction nanofiber membrane assembly in the low-concentration water-based uranium solution can be improved, and the service life is long.