705 results about "Adsorption separation" patented technology

The invention discloses a method for continuously and efficiently adsorbing and separating hydrogen isotopes. The hydrogen isotopes are separated by adopting a multi-tower variable-temperature variable-pressure device operated in a simulated moving bed operation mode. When the device runs, each adsorption tower needs to sequentially execute the following steps: 1, adsorption; 2, replacement; 3, heating; 4, vacuumizing and desorbing; 5, carrying out vacuum purging; 6, pressurizing and cooling; the operation mode of the simulated moving bed is that an adsorption tower is frequently, sequentially and synchronously moved along the gas flowing direction in the tower through all gas input and output ports, so that an adsorbent phase and a gas flowing phase in the tower form countercurrent flow, and the hydrogen isotope adsorption separation efficiency is enhanced. The invention relates to a technological process of cyclic adsorption, replacement, heating, vacuum desorption, pressurization and cooling, continuous and efficient hydrogen and isotope adsorption separation is realized, multi-tower serial adsorption and replacement are adopted in the process, and separation of hydrogen isotopes (such as H2 / D2) is enhanced; and the desorption efficiency of heavy components is improved by adopting a heating and vacuumizing depressurization coupling mode.

The invention provides a synthesis method of a bromide ion adsorbent for salt lake bromine extraction, and belongs to the technical field of adsorbent preparation, a mixed solution of strontium chloride and manganese chloride and a mixed solution of sodium phosphate and sodium hydroxide are subjected to precipitation reaction to obtain A-Sr4Mn6 (PO4) 6 (OH) 2; the preparation method comprises the following steps: reacting A-Sr4Mn6 (PO4) 6 (OH) 2 with a sodium bromide solution to obtain B-Sr4Mn6 (PO4) 6Br2; and reacting the B-Sr4Mn6 (PO4) 6Br2 with a sodium hydroxide solution to obtain Sr4Mn6 (PO4) 6 (OH) 2, namely the bromide ion adsorbent. The prepared adsorbent can selectively adsorb bromide ions from high-salt brine, and has the advantages of high adsorption capacity, high selectivity, high recyclability and the like; in brine with extremely high chloride ion concentration, low-concentration bromide ions can be selectively adsorbed without being influenced by high-concentration chloride ions; in a high-salt water body, the adsorption capacity on bromide ions is higher; the selective adsorption separation of the chloride ions and the bromide ions is realized.

The invention discloses a diaphragm sorting device for waste lithium battery recycling, and relates to the technical field of diaphragm sorting, the diaphragm sorting device for waste lithium battery recycling comprises a shell, a screening assembly, a winnowing assembly and an adsorption separation assembly.Large particles, medium particles and light materials are screened out through small screen holes, medium screen holes and large screen holes in a screen, and when the screen reciprocates up and down, the large particles and the medium particles are separated; the two symmetrically-arranged baffles are driven by the connecting rod to conduct continuous opening and closing actions, periodic opening and closing are achieved, the opening and closing frequency of the baffles is synchronous with the vibration frequency of the screen, dynamic control over falling materials is formed, it can be ensured that the materials falling every time are single-layer particles, multi-layer accumulation is avoided, and when the single-layer materials fall, the particles are evenly distributed in the vertical direction, and the quality of the particles is improved. Air flow can vertically act on each particle conveniently, the situation that bottom layer particles in multiple layers of materials cannot be effectively separated due to insufficient air flow penetration is avoided, and the screening precision is remarkably improved through linkage control of screen vibration and the baffles.

The invention relates to an aromatic hydrocarbon isomer adsorbent containing a modified X-type molecular sieve. The outer surface area of the modified X-type molecular sieve is 9.5-19m < 2 > / g, and the sum of the pore volume of mesopores and the pore volume of macropores is 6%-18% of the total pore volume. The p-xylene adsorbent comprises 88-95% by mass of a modified X-type molecular sieve, 4-11% by mass of a crystal transformation X-type molecular sieve and 1-3% by mass of a matrix. The invention also relates to a preparation method of the adsorbent and application of the adsorbent in adsorption separation of p-xylene from mixed C8 aromatic hydrocarbons.

The invention provides an SSZ-13 molecular sieve as well as a preparation method and application thereof, the preparation method comprises the following steps: mixing activated silica-alumina minerals, SSZ-13 seed crystals, a silicon source, a template agent and a second alkali source to obtain dry glue, and then carrying out crystallization treatment on the dry glue in the presence of water vapor to obtain the SSZ-13 molecular sieve. According to the preparation method, a solvent is not adopted, a small amount of deionized water is used for providing a steam phase, the utilization rate of the raw materials can be increased, the high solid yield is obtained, the loss of a solid phase is reduced, no alkaline wastewater is generated, and the synthesis cost of the SSZ-13 molecular sieve is remarkably reduced. When the SSZ-13 molecular sieve prepared by the method is used for CO2 / CH4 adsorption separation, the SSZ-13 molecular sieve has relatively high separation selectivity.

The invention discloses a fused electrostatic spinning polymer / molecular sieve blended composite fiber as well as a preparation method and application thereof. The melt electrostatic spinning polymer / molecular sieve blended composite fiber is prepared from the following raw materials in parts by weight: 25-90 parts of a thermoplastic polymer matrix, 5-75 parts of a molecular sieve, 1-10 parts of a compatibilizer and 0-5 parts of a conductive additive. According to the polymer / molecular sieve blended composite fiber material and the preparation technology, no solvent participates in the whole process, and the green manufacturing requirement is met. Moreover, in the fiber material, the molecular sieves can be uniformly distributed on the superfine polymer fibers, scanning electron microscope pictures show that the molecular sieves are uniformly embedded into the material, no aggregate larger than 10 microns exists, and the fiber material has a hierarchical pore structure, a high specific surface area and excellent mechanical properties. Therefore, the fiber material can be applied to the fields of air filtration, catalytic reaction, drying purification, adsorption separation and the like.

The invention discloses a real-time monitoring data control method for adsorption separation and an adsorption separation device, and relates to the technical field of adsorption and analysis regulation and control. The method comprises the following steps: setting a first cleanliness threshold value of finished gas and a second cleanliness threshold value of desorption gas; according to the current state of the first cleanliness and the current state of the second cleanliness, the regeneration medium flow of the analysis process is dynamically adjusted; or when the first cleanliness reaches the first cleanliness threshold value and the second cleanliness reaches the second cleanliness threshold value, the current adsorption process is ended, and the working mode is switched; if the second cleanliness does not reach the threshold value, the regeneration medium flow is increased until the switching condition is met. Saturation regulation is carried out by monitoring the dual states of the finished gas and the desorption gas in real time, actual working condition fluctuation can be responded in a self-adaptive mode, the quality stability of the finished gas is guaranteed, meanwhile, the problem that regeneration is insufficient or regeneration media are excessively consumed is solved, and operation energy consumption is remarkably reduced.

Provided in the present invention are a preparation method for a crown ether covalent organic framework material, and the use thereof in iodine adsorption. In the present invention, an 18-crown-6-ether group is introduced into the structure of a covalent organic framework (COF) material for iodine adsorption work. The covalent organic framework material can form a one-dimensional pore channel structure in order, and the 18-crown-6-ether can be selectively complexed with iodine molecules, thereby achieving the purpose of efficient iodine adsorption. The material can perform specific iodine adsorption from high-temperature iodine steam, and the iodine steam adsorption capacity of the COF material is as high as 5.56 g / g. The COF material has a high adsorption capacity, is easy to prepare and simple to operate, has a high adsorption efficiency, and is particularly suitable for adsorbing and separating radioactive iodine in the nuclear industry.

The invention relates to the technical field of methanol resource utilization, and discloses a system for preparing methanol based on SOEC-CH4 electrolysis, which is characterized in that a cathode subsystem main body reacts to generate water vapor and H2 mixed gas, the water vapor and H2 mixed gas are condensed and separated to obtain H2, and most of H2 is conveyed to an H2 storage buffer tank and stored; the anode subsystem for preparing CO2 comprises a CH4 tank, an anode subsystem main body and an electrolytic bath anode of an SOEC electrolytic bath which are communicated in sequence, and the anode subsystem main body reacts to generate water vapor, CH4 and CO2 mixed gas; the mixed gas of the water vapor, CH4 and CO2 is subjected to condensation and adsorption separation to obtain CO2, and most of CO2 is conveyed to a CO2 storage buffer tank to be stored; and the methanol preparation subsystem reacts to obtain methanol. According to the system for preparing methanol through electrolysis, methane is introduced to prepare carbon dioxide, the technical problems of high energy consumption and low comprehensive utilization rate of waste heat and wastewater are solved, and cost is greatly reduced to prepare methanol.

The invention discloses a carbon fluoride molecular sieve adsorbent, a preparation method thereof and application of the carbon fluoride molecular sieve adsorbent in purification of electronic-grade fluorine-nitrogen mixed gas. According to the method, a stable passivation layer composed of fluorine-containing chemical bonds is formed on the inner surface and the outer surface of a carbon material through direct fluorination treatment on a carbon molecular sieve. Compared with other fluorination methods, the method has the advantages of higher fluorination degree and lower reaction temperature; meanwhile, the operation is simple, and the thermal stability of fluorine-containing groups on the surface of the treated carbon molecular sieve is good. The fluorinated carbon molecular sieve adsorbent has greatly improved corrosion resistance, can maintain stable adsorption separation performance in gas atmospheres with extremely strong corrosivity, such as fluorine gas and hydrogen fluoride, and is suitable for deep removal of trace oxygen impurities in electronic-grade gas fluorine-nitrogen mixed gas.

The invention provides a method for recovering platinum group metal from a waste automobile exhaust purification catalyst, and belongs to the field of precious metal recovery. The method comprises the following steps: carrying out crushing and impurity removal pretreatment on the waste catalyst to obtain solid residues; mixing the obtained solid slag with alkali liquor, and performing hot-pressing activation to obtain active slag; leaching the active slag by using an acid leaching system of hydrochloric acid-hydrogen peroxide-sodium chloride to obtain a leaching solution enriched with platinum group metals; adjusting the acidity of the leachate, adding a first adsorption material, selectively adsorbing platinum and palladium, and separating supernate and a platinum / palladium enrichment material; adjusting the acidity of the supernate, adding a second adsorption material, selectively adsorbing rhodium, carrying out solid-liquid separation, and collecting a rhodium enrichment material; respectively eluting and refining the platinum / palladium enrichment material and the rhodium enrichment material, and recovering platinum, palladium and rhodium; through the optimally designed recovery method of alkaline hot-pressing activation-mild acidic directional leaching-two-stage magnetic adsorption separation, efficient recovery of platinum, palladium and rhodium in the waste automobile exhaust catalyst is realized.

The invention provides a crown ether functionalized covalent organic framework material and a preparation method and application thereof, the crown ether functionalized covalent organic framework material has a structure as shown in a general formula A. Benzocrown ether functional groups are introduced into the structure of the covalent organic framework material through a bottom-to-top method for adsorption separation of lithium ions; and the lithium adsorption capacity is good.

The invention relates to the technical field of rare earth element separation methods, in particular to a method for separating ytterbium and lutetium by using a phosphate adsorbent, which comprises the following steps: loading a phosphate solution on a porous solid-phase carrier by using a vacuum impregnation method, and carrying out reduced pressure evaporation and drying to obtain a phosphate solid adsorbent; filling an exchange column with the solid adsorbent to obtain the exchange column filled with the solid adsorbent; enabling a nitric acid solution containing ytterbium and lutetium to flow through an exchange column filled with a solid adsorbent to complete a column adsorption process; and performing elution, performing desorption by using a desorption solution to obtain the regenerated exchange column filled with the solid adsorbent, respectively collecting the ytterbium solution and the lutetium solution, completing the separation process, and repeating the steps. By adopting the steps, the separation of ytterbium and lutetium is directly realized from the nitric acid solution containing ytterbium Yb and lutetium Lu through column adsorption separation, leaching and desorption processes, and high-purity ytterbium and lutetium products are prepared.

The invention discloses a carboxyl-functionalized porous organic polymer, a preparation method thereof and application of the carboxyl-functionalized porous organic polymer in ammonia gas adsorption separation and sensing. The polymer is obtained by free radical polymerization, hydrolysis and acidification of monomers containing vinyl and ester groups, and has a mesoporous structure and a skeleton carboxyl functional group. The preparation method is simple and mild in condition. The polymer has excellent adsorption selectivity and high adsorption capacity on ammonia gas, the static adsorption capacity on the ammonia gas under the conditions of 298 K and 1 bar is not lower than 6.5 mmol / g, the ammonia gas can be efficiently separated from NH / N / H and NH / COs mixed gas, and the cycling stability is good. An ammonia gas sensor prepared by taking the graphene oxide as a sensitive material has linear or piecewise linear response to ammonia gas with the concentration of 1-100 ppm at room temperature, the detection limit is lower than 30 ppb, and the selectivity is excellent. The invention overcomes the defects of the existing ammonia gas adsorption separation material and sensor, has important significance for optimizing the ammonia production process and reducing pollution, and has wide application prospects.

The invention discloses a preparation method and application of a metal covalent organic framework material, and the prepared metal covalent organic framework material can be used for adsorption separation of elemental iodine pollutants and shows excellent iodine adsorption capacity and rate. According to the preparation method, 1H-pyrazole-4-formaldehyde and copper nitrate trihydrate are subjected to a solvothermal reaction to prepare a copper ion ring trinuclear metal complex with an aldehyde group, and the copper ion ring trinuclear metal complex and 1, 3, 5-tri (4-aminophenyl) benzene are further subjected to a Schiff base reaction to prepare the metal covalent organic framework material containing copper ions. According to the metal covalent organic framework material disclosed by the invention, copper ion active adsorption sites in a chemical structure are also retained while a developed microporous structure is maintained, and the interaction strength of pore channels to iodine is remarkably enhanced, so that the iodine adsorption rate and capacity are remarkably improved. The preparation method is simple, convenient, universal and high in controllability, and large-scale production and manufacturing of the metal covalent organic framework adsorption material can be achieved.

The present invention relates to the technical field of polymer preparation. Disclosed are a covalent organic framework material, and a preparation method therefor and a use thereof. The preparation method for the covalent organic framework material comprises the following step: subjecting an organic aldehyde and an organic amine to a condensation reaction in a deep eutectic solvent to obtain the covalent organic framework material, wherein the deep eutectic solvent is a two-component eutectic liquid composed of menthol and acetic acid. The temperature for the reaction is 25-120ºC, and the time for the reaction is 1-72 hours. The deep eutectic solvent composed of menthol and acetic acid used in the present invention has good dissolution properties for organic matters, and can also efficiently catalyze the condensation reaction between the organic amine and the organic aldehyde. The prepared covalent organic framework material exhibits high crystallinity and has good applications in the fields of adsorptive separation, heterogeneous catalysis, energy storage, etc. The present method has mild reaction conditions, simple operation, and good universality, is conducive to industrial large-scale production, and conforms to the concept of green chemistry.

The utility model discloses a purification device for fluoroethylene carbonate, and relates to the technical field of fluoroethylene carbonate processing. The fluoroethylene carbonate purification device comprises a distillation kettle, wherein a filtering mechanism for filtering and separating fluoroethylene carbonate is fixedly mounted on one side of the top of the distillation kettle. Through the high adsorption effect of the nano-porous plate, particles and impurities in fluoroethylene carbonate liquid can be conveniently adsorbed and separated, the constant-speed motor is powered on and operates to drive the baffle to rotate, and the impurities and the particles adsorbed on the surface of the nano-porous plate can be pushed into the pipe fitting through the rotating baffle. The collected impurities and particles are conveyed into the storage box through the pipe fitting to be stored and collected, the separated fluoroethylene carbonate liquid is conveyed into the distillation still through the conveying pipe to be purified, and the purity of fluoroethylene carbonate is remarkably improved through matched use of the nano-porous plate and the storage box.

The invention relates to an adsorbent based on an X molecular sieve and preparation and application thereof, and a preparation method of the adsorbent comprises the following steps: (1) mixing the X molecular sieve with a binder, molding and roasting to obtain a molded body; (2) treating the molded body obtained in the step (1) with an alkali solution to perform in-situ crystallization on the binder in the molded body to obtain a crystallized product; (3) carrying out partial barium ion exchange on the crystallized product obtained in the step (2) by using a barium salt solution, and drying to obtain a dried product; (4) carrying out ammonium ion exchange on the dried product obtained in the step (3) by using an ammonium salt solution, and roasting in a flowing atmosphere to obtain a roasted product; and (5) performing barium ion exchange and optional potassium ion exchange on the roasted product obtained in the step (4), and then drying to obtain the adsorbent. The adsorbent has at least two kinds of mesoporous channels with different apertures, has high barium ion exchange capacity, high adsorption capacity and compressive strength, and shows good adsorption selectivity and mass transfer performance when used for adsorption separation of p-xylene.

The invention discloses a method for screening an MOFs material with excellent CH4 adsorption separation performance based on high-throughput calculation, a method for improving the screening efficiency and a preparation method. The screening method comprises the following steps: constructing a screening database of MOFs material structure information; calculating physical and chemical characteristic parameters by utilizing computational chemistry and material simulation software, and further setting a screening standard aiming at CH4 adsorption; carrying out preliminary screening through a high-throughput screening technology; predicting the competitive adsorption behavior of the primarily selected material in the mixed gas by means of a molecular simulation technology, and performing secondary screening; and finally, determining the final MOFs material in combination with an actual application environment. According to the method, the high-performance MOFs material is rapidly and accurately screened out from a large number of materials, the research and development period is effectively shortened, the development cost is reduced, an efficient and feasible solution is provided for resource utilization of ultralow-concentration CH4 in coal mine windblown gas, and energy utilization and environmental protection are assisted.

The invention discloses a composite membrane with adsorption separation and catalytic degradation functions as well as a preparation method and application of the composite membrane. The composite membrane is supported by a porous base membrane, a polyamide separation layer formed by reaction of a 3, 4-dihydroxyphenylethylamine and 2, 3-diaminophenol comonomer and acyl chloride is constructed on the surface of the porous base membrane through interfacial polymerization, and FeCo-g-C3N4 nanosheets are anchored in situ; the membrane can efficiently activate peroxymonosulfate (PMS) to generate free radicals under the nearly neutral condition, efficient interception and catalytic degradation of organic pollutants (such as antibiotics) are synchronously achieved, and heavy metal ions (such as Pb < 2 + > and Cd < 2 + >) are adsorbed through a functional monomer structure; the invention provides an interfacial polymerization preparation method of the membrane. The composite membrane breaks through the limitation of'only interception but not degradation 'of a traditional membrane, realizes integration of'separation-adsorption-degradation', can remarkably reduce the volume of concentrated water and reduce the toxicity of the concentrated water, and is suitable for advanced treatment of wastewater containing composite pollutants in the industries of pharmacy, printing and dyeing and the like.

The invention discloses an application of a novel miscellaneous [3] aromatic hydrocarbon crystal material in adsorptive separation of a pyrrolidine and tetrahydrofuran mixture and / or capture of iodine vapor, and relates to the technical field of adsorption.Firstly, the novel miscellaneous [3] aromatic hydrocarbon crystal material capable of adsorptive separation of pyrrolidine and tetrahydrofuran so as to realize iodine capture is synthesized; the application method comprises the following steps: selectively adsorbing pyrrolidine in a mixture of pyrrolidine and tetrahydrofuran by adopting the novel miscellaneous [3] aromatic hydrocarbon crystal material to obtain a pyrrolidine-miscellaneous [3] aromatic hydrocarbon crystal material, realizing separation of tetrahydrofuran and pyrrolidine, and capturing iodine vapor by adopting the pyrrolidine-miscellaneous [3] aromatic hydrocarbon crystal material. Compared with other macrocyclic aromatic hydrocarbons, the method provided by the invention not only can realize separation of tetrahydrofuran and pyrrolidine, but also has the advantages of high iodine adsorption capacity, good thermal stability and the like; meanwhile, the synthesis method has the advantages of simplicity in operation, high yield, simplicity in post-treatment, easiness in separation and purification of products and the like.

The invention relates to the technical field of separation, and discloses a molecular sieve separation system for medical oxygen production, which comprises an adsorption separation group, a fluid control valve group, a pressure monitoring unit and a self-adaptive control center, the self-adaptive control center executes capacity locking logic and regeneration clamping logic based on fluid impedance fingerprint characteristics, monitoring the actual pressurizing duration of the adsorption pressurizing stage in real time, calculating a deviation value between the actual pressurizing duration and the reference adsorption duration, and generating a primary switching instruction; meanwhile, the real-time residual desorption pressure of the other adsorption bed layer is obtained and compared with a regeneration end point pressure threshold value, a final step sequence switching instruction is output when the conditions are met, and self-adaptive locking of the real adsorption capacity of the molecular sieve is achieved by recognizing the adsorption capacity saturation characteristics and decoupling gas source fluctuation.

The invention discloses a photo-thermal carbon dioxide adsorbent as well as a preparation method and application thereof. The photo-thermal carbon dioxide adsorbent is green in production process and wide in raw material source, chitosan which is high in natural abundance and low in price is directly used as a raw material, and the energy consumption in the preparation process is effectively reduced through a composite pore-forming strategy that an activating agent, a pore-forming agent and a nitrogen source are introduced through a one-pot method. The photo-thermal carbon dioxide adsorbent provided by the invention can realize direct carbon capture in normal-temperature air or adsorption separation of CO2 in flue gas, and then realizes zero-carbon desorption under sunlight irradiation, thereby providing a new idea for capture, utilization and storage of carbon dioxide.

The invention discloses an adsorbent material for removing perfluorinated and polyfluoroalkyl substances in water and a preparation method thereof, and belongs to the technical field of adsorption separation. The preparation method of the adsorbent material for removing perfluorinated and polyfluorinated alkyl substances in water comprises the following five steps: preparing melamine cyanurate in-situ coated lignin, preparing a precursor, carbonizing, activating with water vapor, and performing hydrothermal secondary activation. The specific surface area of the adsorbent material for removing perfluorinated and polyfluoroalkyl substances in water is 1109-1205m < 2 > / g, the average pore size is 24.2-30.7 nm, and the saturated adsorption capacities of the adsorbent material for PFOS, PFOA and PFBA are respectively 158-183mg / g, 163-177mg / g and 161-170mg / g.

The invention discloses a molecular sieve / polyacrylate spherical composite material for CO2 adsorption separation and a preparation method thereof, and belongs to the technical field of gas separation. A spherical porous polyacrylate carrier and molecular sieve crystals loaded in the polyacrylate spherical carrier are included, part of a silicon-aluminum precursor is arranged in the molecular sieve crystals when the polyacrylate spherical carrier is synthesized, and then an external growth solution provides an aluminum source and an alkali source to enable the molecular sieve crystals to grow in holes of the carrier in situ; the molecular sieve crystals are selected from LTA type molecular sieves with CO2 adsorption capacity in reported documents. Meanwhile, the problem of performance reduction caused by direct molding of molecular sieve powder is solved, the separation efficiency is improved, and the method is particularly suitable for high-humidity conditions.

The invention discloses a method for preparing battery-grade lithium carbonate by extracting lithium from sulfate-type salt lake sodium-removed brine, which comprises the following steps: 1) conveying extracted sulfate-type salt lake original brine to a sodium-removed salt pond for concentration to form sodium-removed brine with improved lithium concentration; 2) carrying out adsorption separation treatment on the sodium-removed brine to form qualified lithium liquid; (3) carrying out membrane separation treatment on the qualified lithium liquid to form a refined lithium concentrated solution; and 4) carrying out lithium precipitation treatment on the lithium refined concentrated solution to obtain the battery-grade lithium carbonate. Separation and extraction of lithium in sodium-removed brine with different lithium concentrations in a sulfate type salt lake and preparation of battery-grade lithium carbonate can be realized, meanwhile, the composition change of the brine after lithium extraction is extremely low, and subsequent product production is not influenced.

The invention belongs to the field of heavy metal adsorption separation and solid adsorbents, and provides a dendritic polyethyleneimine surface modified GO / MXene nano adsorbent as well as a preparation method and application thereof. The preparation method comprises the following steps: mixing a graphene oxide dispersion liquid with a Ti3C2Tx colloidal solution, and carrying out dispersion treatment to obtain a GO-Ti3C2Tx mixed solution with a certain concentration; adding dendritic polyethyleneimine, and carrying out covalent modification and electrostatic assembly strategy reaction to obtain a dendritic polyethyleneimine modified GO / MXene reaction solution; and centrifuging, washing and drying to obtain the dendritic polyethyleneimine surface modified GO / MXene adsorbent. According to the invention, the nitrogen-rich cationic polymer is introduced, so that the adsorption capacity of graphene oxide to Cr (VI) is improved; the preparation process is simple, green and environment-friendly; the obtained adsorbent can efficiently remove Cr (VI) in a water body, and has a good adsorption effect on Cr (VI).

The invention relates to a cobalt-aluminum-zinc hydrotalcite assembled membrane catalyst as well as a preparation method and application thereof. The catalyst is composed of an assembled film and cobalt-aluminum-zinc hydrotalcite, wherein the molar ratio of Co to Al to Zn in the cobalt-aluminum-zinc hydrotalcite is 1: (1-2): (1-2), and the mass ratio of the cobalt-aluminum-zinc hydrotalcite in the assembled membrane catalyst is 35%-55%. Through a specific vacuum-assisted flocculation assembly method, the characteristic of high specific surface area of the hydrotalcite material is maintained, and rich active sites are provided for the processes of catalytic reaction, adsorption separation and the like. The preparation process of the catalyst comprises preparation of CoAlZn-LDH and preparation of a CoAlZn-LDH assembled film, the process not only improves the catalytic efficiency, but also optimizes the mechanical strength and thermal stability of the catalyst through introduction of the assembled film, and can maintain the stability of the structure and performance under harsh conditions.

The invention provides a method for preparing a ceramic material from lithium slag obtained by extracting lithium through a spodumene acid method, and relates to the technical field of energy conservation and environmental protection. The method for preparing the ceramic material by extracting the lithium slag through the spodumene acid method comprises the following steps: S1, component analysis: carrying out comprehensive component analysis on the lithium slag; s2, magnetic separation iron removal: enabling the lithium slag to pass through a magnetic field by using a magnetic separator, so that magnetic iron impurities in the lithium slag are adsorbed and separated; s3, particle size adjustment is conducted, and mechanical equipment is adopted for conducting particle size grading and grinding treatment on the lithium slag; step S4, mixing and ball-milling: according to a preset formula proportion, adding the lithium slag, kaolin, feldspar, quartz and an additive into a ball mill in proportion, adding a proper amount of water, and carrying out ball-milling and mixing for 2-4 hours, so that the raw materials are fully and uniformly mixed to obtain uniform ceramic blank slurry; finally, the problems that the lithium slag is difficult to treat, the requirement for ceramic materials is large, the preparation cost is high and the performance needs to be improved are solved, and energy-saving and environment-friendly treatment and resource recycling of lithium slag resources are achieved.

The application provides a solid waste synthesis SSZ-16 zeolite molecular sieve and adsorption separation application thereof, and relates to the technical field of zeolite molecular sieves. Water, an alkali source, an organic template agent, a silicon source and FCC solid waste are mixed to obtain an initial reaction gel; the initial reaction gel is subjected to hydrothermal crystallization to obtain an initial SSZ-16 zeolite molecular sieve; and the initial SSZ-16 zeolite molecular sieve is calcined to obtain an SSZ-16 zeolite molecular sieve. The application uses the FCC solid waste without any treatment as an aluminum source, additionally supplements a silicon source, an organic template agent and an alkali source, and for the first time utilizes the FCC solid waste to synthesize the SSZ-16 zeolite molecular sieve with an AFX topological structure through a hydrothermal method. Moreover, the synthesized SSZ-16 zeolite molecular sieve has excellent selective adsorption and separation performance of carbon dioxide, and has a broad prospect in application fields such as flue gas carbon dioxide capture and natural gas carbon dioxide removal.