1160results about "Aluminium silicates" patented technology

The invention provides analcime based on alkali grinding activation as well as a preparation method and application of the analcime. The preparation method of analcime comprises the following steps: S1, providing lithium slag; s2, ball-milling the solid material and water together to obtain a ball-milled product; the solid material comprises the lithium slag and an alkaline auxiliary material, and the alkaline auxiliary material comprises one or more of sodium hydroxide and potassium hydroxide; s3, mixing the ball-milled product with an alkaline solution to obtain a to-be-treated solution; performing hydro-thermal treatment on the to-be-treated liquid to obtain reaction liquid; and S4, carrying out solid-liquid separation on the reaction liquid to obtain a solid isolate containing analcime. The analcime with high crystallinity and high yield can be obtained, a new way is provided for preparation of the analcime, and a new way is also provided for resourceful treatment of the lithium slag.

The invention belongs to the technical field of thermal insulation material preparation, and discloses modified silicon dioxide aerogel powder and a preparation method thereof, aerogel slurry and a preparation method and application thereof. The preparation method of the modified silicon dioxide aerogel powder comprises the following steps: (1) modifying a halloysite nanotube by using dodecyl methacrylate and pentafluorophenyl methacrylate; (2) preparing silica sol; (3) adding the modified halloysite nanotube into silica sol to prepare wet gel; and (5) preparing the wet gel into modified silicon dioxide aerogel powder. According to the invention, the modified silicon dioxide aerogel powder is used for preparing aerogel slurry, and the aerogel slurry is used for preparing the aerogel heat insulation felt. The aerogel heat insulation felt prepared in the invention shows low heat conductivity, and can effectively block heat transfer; the aerogel heat insulation felt prepared by the invention has good mechanical properties, and meanwhile, the powder falling amount is small, so that transportation is facilitated, and the aerogel heat insulation felt can adapt to heat insulation application in various scenes.

The invention provides a preparation method and an application method of a gasified slag-based carbon-zeolite composite material, and belongs to the technical field of carbon-zeolite composite materials. The preparation method comprises the following steps: taking gasified slag as a raw material, mixing the gasified slag with alkali, a silicon source substance, a surfactant and water, and sequentially carrying out aging treatment and hydrothermal reaction to obtain the gasified slag-based carbon-zeolite composite material. The gasified slag-based carbon-zeolite composite functional material is prepared from the gasified slag, the process is simple, the preparation cost is low, meanwhile, high-added-value utilization of the gasified slag is achieved, the purpose of treating waste with waste is achieved, and economic benefits and environmental protection benefits are achieved. The gasified slag-based carbon-zeolite composite functional material prepared by the invention has a good removal effect on low-concentration ammonia nitrogen and organic matter wastewater, has regeneration performance, and still has good ammonia nitrogen adsorption and organic pollutant degradation performance after regeneration.

The invention discloses a method for preparing a catalytic material by synergistically utilizing red mud and electrolytic manganese residues as well as a product and application thereof. The method comprises the following steps: mixing electrolytic manganese residues and red mud, uniformly stirring, adding ammonium chloride, stirring, adding a hydrochloric acid solution, stirring, roasting and grinding. And adding an auxiliary agent, uniformly stirring, adding water, granulating, standing, carrying out hydrothermal reaction, and roasting to obtain the catalytic material. The preparation process is simple, the technological process is brief, the needed core raw materials are only the red mud and the electrolytic manganese residues, and resource utilization of the red mud and the electrolytic manganese residues is efficiently achieved. The prepared catalytic material can quickly adsorb pollutants in waste liquid under the condition of no photocatalysis, and the removal effect on COD (Chemical Oxygen Demand), ammonia nitrogen, total phosphorus and heavy metal mercury can be further remarkably improved under the photocatalysis condition.

To provide a heat and carbon dioxide utilization system that uses an adsorbent to generate a large amount of heat per unit volume when water vapor is adsorbed, and that can supply carbon dioxide with a balanced supply of heat and carbon dioxide.SOLUTION: A heat and carbon dioxide utilization system comprises: drying and cooling an adsorbent having pores capable of adsorbing and desorbing water vapor and carbon dioxide by flowing heated air through the adsorbent, and then supplying dehumidified air containing carbon dioxide to the adsorbent to cause the adsorbent to adsorb carbon dioxide; transporting the adsorbent with adsorbed carbon dioxide to a horticultural facility; and supplying the carbon dioxide released from the adsorbent into the horticultural facility, and then supplying the heat generated when the adsorbent adsorbs water vapor.SELECTED DRAWING: Figure 1

A carbon dioxide capture module according to one or more embodiments may include: an absorber containing an amine-based absorbent capable of absorbing carbon dioxide; and a filter allowing air to pass through and preventing permeation of the amine-based absorbent. The filter is located between the amine-based absorbent and ambient air of the carbon dioxide capture module.

Porous structures are made from compositions that include hollow glass bodies and an inorganic powder. The inorganic powder may act as a rigid frame member, a crystallization agent, or both, which reduces the shrinkage of the porous structures during firing. The porous structures made therefrom have an open porosity of greater than 70% and reduced shrinkage of less than 10% compared to the green structures prior to firing. Methods for firing the green structures made from the compositions are also disclosed, the firing methods including reducing a temperature ramping rate of the green structures during a crystallization temperature range of the glass of the hollow bodies.

Apparatuses and methods for extracting desired chemical species including, without limitation, lithium, specific lithium species, and / or other chemical compounds from input flows in a modular unit. The input flows may be raw materials in which lithium metal and / or lithium species are dissolved and / or extracted. The apparatuses and methods may include daisy chain flow through separate tanks, a column array, and / or combinations thereof.

The invention belongs to the technical field of wastewater treatment, and particularly relates to multi-element doped synergistically modified ferrihydrite as well as a preparation method and application thereof, and the ferrihydrite is doped with at least one rare earth element and at least one of an aluminum element and a silicon element; the doping amount of the rare earth elements in the ferrihydrite is 0.5-20wt%; the doping amount of the aluminum element in the ferrihydrite is 0-20wt%; the doping amount of the silicon element in the ferrihydrite is 0-20wt%. Compared with the prior art, the method solves the problems that in ferrihydrite single-element modification in the prior art, although stability is improved through Al / Si doping, element modification in the same period is limited in improvement of the adsorption capacity, and the specific recognition capacity on phosphate radicals cannot be improved; and the anti-interference performance of the rare earth doped in the complex water matrix still needs to be improved. According to the scheme, rare earth and Al / Si doping are combined, so that improvement of phosphorus adsorption stability, adsorption capacity, specific recognition capability and anti-interference performance of ferrihydrite is realized synergistically.

An adsorbent composition comprising: a plurality of particles of an acid-activated clay with a predetermined particle size. Each particle may have a surface comprising metal oxides or metal hydroxides and each particle may have a surface modified by coupling the metal oxides to ligands comprising amino-silane coupling agents configured to adsorb impurities. Each amino-silane coupling agents may comprise an alkoxysilane group and an amine group. The alkoxysilane group may couple to the metal oxide or metal peroxide of each particle. The adsorbent composition may comprise the amino-silane coupling agent and the acid-activated clay with a wight ratio between 2:2 and 3:1 (the acid-activated clay: the amino-silane coupling agent). The acid-activated clay may comprise a plurality of pore with a predetermined diameter formed between particles.

The invention discloses a fly ash-based geopolymer carbon sequestration adsorption material and a preparation method thereof, and belongs to the technical field of engineering materials. The material disclosed by the invention is modified by adding 13X zeolite with a specific particle size, and the carbon sequestration adsorption performance of the material is remarkably improved through an in-situ hydrothermal conversion process. The fly ash-based geopolymer material and the preparation method disclosed by the invention are simple and easy to implement, are easy to implement in industrial production, and can overcome the defects of low mineralization efficiency and unstable reaction products caused by direct reaction of solid waste with CO2 to generate a mineralized (carbonate) filling material at present. The geopolymer carbon sequestration adsorption material has a wide application prospect, provides a new method for synergistically solving the problems of carbon sequestration, solid waste disposal and waste underground space reutilization, and has important environmental protection, social and economic benefits.

The invention provides a cross-adsorption-temperature industrial organic waste gas adsorbent type selection method and application, two or more model adsorption materials with concentrated pore size distribution are used, and filling type adsorption with high pore volume utilization rate can be formed in pores with a specific size or below due to adsorption of volatile organic compounds (VOCs) on a porous material; and a matching relation equation between the filling type adsorption critical aperture and the adsorption partial pressure and a rule of changing along with the adsorption temperature are explored. According to the method, the partial pressure is normalized relative to the saturated vapor pressure at the respective adsorption temperature, and the parameter saturated vapor pressure related to the adsorption temperature is introduced into an equation as a variable, so that an equation of critical pore diameters suitable for adsorption of VOCs at different temperatures and concentrations is established; and a cross-adsorption-temperature industrial organic waste gas adsorbent type selection method is formed. The method provided by the invention can provide a quantitative reference basis for development of VOCs efficient adsorption materials and technologies suitable for different adsorption temperatures.

The invention provides an adsorbent, a preparation method thereof and application of the adsorbent to separation of ethylbenzene from C8 mixed aromatic hydrocarbon, and relates to the technical field of adsorbents. The method comprises the following steps: mixing a silicon source, an aluminum source and water to obtain a first mixed solution; 2-aminoterephthalic acid, titanium isopropylate, N, N-dimethylformamide and methyl alcohol are mixed, and a second mixed solution is obtained; mixing the first mixed solution, the second mixed solution and an alkali metal salt solution to obtain a third mixed solution; performing hydrothermal reaction on the third mixed solution, and roasting an obtained hydrothermal product to obtain the adsorbent. The prepared adsorbent has a molecular sieve / MOF composite structure, alkali metal ions are anchored through organic ligands, and the acting force is stronger, so that the selectivity of the alkali metal ions is enhanced, meanwhile, the molecular sieve and MOF structures provide rich pore structures, and the ethylbenzene adsorption capacity of the material is greatly improved. The adsorbent provided by the invention can realize efficient separation of ethylbenzene from C8 mixed aromatic hydrocarbons, and ethylbenzene selectivity and adsorption capacity are high.

The invention provides a preparation method of a composite porous geopolymer for heavy metal adsorption. The preparation method comprises the following steps: step 1, preparing a geopolymer porous material with through pores; and 2, synthesizing the composite geopolymer porous adsorption material. The composite type geopolymer porous material prepared by the preparation method of the composite type porous geopolymer for heavy metal adsorption can significantly increase the specific surface area of a blocky porous material, so that the adsorption rate of the geopolymer to heavy metals in a water body is greatly increased.

The invention belongs to the field of adsorption materials, and discloses a porous lignin fiber adsorption material and a production process thereof, the porous lignin fiber adsorption material comprises the following raw materials by weight: 40-60 parts of lignin fiber, 20-30 parts of bamboo fiber, 5-15 parts of chitosan, 5-10 parts of sodium bicarbonate, 5-10 parts of attapulgite, 5-10 parts of zeolite, and 2-5 parts of magnetic nanoparticles; the invention aims to provide the production process of the porous lignin fiber adsorption material, the problems that the existing lignin fiber adsorption material is poor in pore structure, limited in adsorption performance, difficult to separate and the like are solved through an innovative raw material formula and an optimized production process, efficient adsorption of light components in asphalt is realized, the stability of an asphalt mixture is enhanced, and the service life of the asphalt mixture is prolonged. Meanwhile, heavy metal ions, organic pollutants and the like are efficiently adsorbed and rapidly separated, the production energy consumption is reduced, and the environmental protection property and economical efficiency of the process are improved.

The invention relates to the technical field of silicon-aluminum aerogel preparation, in particular to a method for preparing high-temperature-resistant silicon-aluminum aerogel by using a coal gangue one-step method, which comprises the following steps: S1, crushing, grinding and sieving coal gangue, mixing the coal gangue with an alkaline solid, and calcining to obtain alkali fusion powder; s2, the alkali fusion powder is subjected to acid treatment and suction filtration, and a silicon-aluminum solution is obtained; s3, adding polystyrene-coated zirconium oxide particles into the silicon-aluminum solution, and sequentially carrying out gelation, primary aging, solvent washing, water washing and secondary aging; s4, washing, replacing and modifying the gel; and S5, drying the hydrophobic wet gel obtained in the step S4 at normal pressure to obtain the silicon-aluminum aerogel. The silicon-aluminum aerogel prepared by the method has the advantages of low density, good thermal stability, high specific surface area, strong hydrophobic property and high strength.

The invention provides a hierarchical porous silicon material and a preparation method thereof, and belongs to the technical field of comprehensive utilization of fly ash. The preparation method of the hierarchical porous silicon material provided by the invention comprises the following steps: mixing fly ash and an activating agent, and calcining to obtain activated fly ash; the activating agent comprises at least one of sodium salt and potassium salt; and mixing the activated fly ash with hydrochloric acid, and carrying out acid etching to obtain the hierarchical porous silicon material. According to the invention, at least one of sodium salt and potassium salt is adopted to activate the fly ash, and at least one of Na < + > and K < + > in the activation process can promote the conversion of mullite in the fly ash to different mineral phase aluminosilicate, so that a nepheline structure of Na and / or K is formed; and then hydrochloric acid is adopted for acid etching, and the alumina component can be selectively etched, so that the hierarchical pore channel is constructed, the process is simplified, and template-free preparation of the hierarchical pore silicon material is realized.

The invention discloses an advanced treatment agent for textile printing and dyeing wastewater and a treatment method. The advanced treatment agent comprises a component A and a component B, the component A comprises modified graphene oxide and an enzyme treatment agent; the component B comprises magnesium aluminum silicate, hydroxyapatite, hydroxypropyl methyl cellulose and chitosan, and the hydroxyapatite is coated with the magnesium aluminum silicate to form a core-shell structure. By adopting a modified graphene oxide immobilized enzyme structure, harmful components in water can be effectively adsorbed, so that the effect of greatly improving sewage purification is achieved, and meanwhile, the adsorption effect of the harmful components can be further improved by matching with aluminum-magnesium silicate coated hydroxyapatite, hydroxypropyl methyl cellulose and chitosan; meanwhile, bonding with the modified graphene oxide is beneficial to agglomeration and flocculation of substances, so that the flocculation capacity is improved, and floc separation is facilitated.

The present disclosure, in various embodiments, discloses hydrothermal methods, hydrothermally modified materials and dried hydrothermally modified materials. Certain dried hydrothermally modified materials can readily releases ionic species such as alkali metal ions (K+, Na+), silicate salts, and alkaline earth metal ions (Mg2+, Ca2+). Some dried hydrothermally modified materials can readily release aluminum ions and / or silicon, such as in the form of soluble silicates. Such processes and materials are useful, for example in economically preparing potassium releasing fertilizers.

The invention provides an adsorption process for recovering ethylene from refinery dry gas through combination of MOF and zeolite, raw material gas is refinery dry gas, a main body contains hydrogen, carbon dioxide, C1-C3 low-carbon hydrocarbon gas and the like, the content of C2H4 is about 10%, a pre-decarburization process and an associated bed process are introduced, the adsorption capacity of an adsorbent is protected, and the content of ethylene is reduced. The non-compliant purity ethylene gas in the pressure swing adsorption process is re-enriched and recovered through an associated bed; in the initial stage of adsorption separation, after CO2 is removed through a customized or commercialized adsorbent, C2H4 enrichment and purification are directly carried out, and by introducing an associated bed, ethylene in gas passing through the adsorption process and ethylene gas in the preliminary desorption process of the adsorption bed are captured again, so that the ethylene recovery rate in the process is improved.

The invention belongs to the technical field of fly ash solid waste resource utilization, and particularly relates to a method for preparing flaky alumina by using fly ash, which is characterized by comprising the steps of fly ash pretreatment, intermediate preparation and alumina preparation, ammonium fluoride used in the alumina preparation step is a recycling product of fluorine-containing tail gas in the step, and ammonium fluoride used in the alumina preparation step is a recycling product of fluorine-containing tail gas in the step. The preparation method comprises the following specific operation steps: 1) pretreating fly ash, namely treating fly ash with a NaOH solution and an HCl solution to obtain a mixture of quartz and mullite; (2) preparing an intermediate, namely reacting a mixture of quartz and mullite with CeO2 to obtain a K3Al (SO4) 3 intermediate; and 3) preparing aluminum oxide, purifying the K3Al (SO4) 3 intermediate, grinding and mixing the purified K3Al (SO4) 3 intermediate and ammonium fluoride crystals according to the F / Al molar ratio, and roasting at high temperature to obtain a flaky aluminum oxide product. The method has the beneficial effects that the problem of low purity of flaky aluminum oxide in the existing method for preparing the aluminum oxide from the fly ash is solved, and the purity of the flaky aluminum oxide is 99.2-99.8%.

Embodiments relate to systems and methods of location determination based on images. Embodiments perform comparison of an input image to images in a library of reference background images using a background matching module to identify a matching image. Embodiments determine location associated with the input image based on the metadata associated with the matching background image.

The invention relates to the field of VOCs treatment, and discloses a composite material for adsorbing VOCs as well as a preparation method and application thereof. The composite material comprises foam metal and a heat-conducting adsorption material filled in a foam metal framework, the heat-conducting adsorption material comprises a porous material and a heat-conducting material. The composite material provided by the invention has the characteristic of good heat conduction effect, meanwhile, the shape and the size of the foam metal can be randomly adjusted according to the requirements of an adsorption bed layer, and the composite material can be used for adsorbing light hydrocarbons, such as small molecules such as ethane and propane.

The invention discloses a preparation method of an aluminum silicate-based nanoflower porous material, the prepared product presents a special nanoflower-shaped morphology, has fibrous open pore channels, and has the characteristics of highly open space, effective utilization of active sites and the like, aluminum salt, TEOS (tetraethyl orthosilicate) and the like are adopted as raw materials, and the aluminum silicate-based nanoflower porous material is prepared. A novel catalyst carrier material with a nano flower-shaped structure is prepared by a hydrothermal method. Due to the large pore volume between the nano petals and an excellent directly reachable interface structure, various catalytic active sites can be well dispersed on the surfaces of the petal structures. The preparation process is simple and controllable, and the obtained product is rich in hole pattern, high in specific surface area and convenient for industrial preparation. Meanwhile, the obtained product is convenient for further processing and preparation of a catalyst with extremely excellent performance.

The invention provides an integral adsorbent based on a 3D printing technology. The halloysite nanotube and the hydroxypropyl methyl cellulose are selected as binders, and the halloysite nanotube has excellent high-temperature resistance, hardness, durability and chemical stability and can meet the application requirements of the catalyst under high-temperature complex working conditions, so that the catalyst structure keeps mechanical stability; the hydroxypropyl methyl cellulose has treatability and plasticity, can help to print complex shapes and structures, can effectively adhere printing materials due to super-strong adhesion force and interlayer adhesion, ensures firmness and stability of interlayer adhesion in the printing process, and is beneficial to reducing distortion and deformation in the printing process. The integral passive NOx adsorbent provided by the invention is simple and feasible in preparation method, is a non-noble metal adsorbent with economic benefits, and is connected in series with a downstream SCR (Selective Catalytic Reduction) treatment unit to realize ultralow emission in a NOx cold start stage.

Aerogel materials, aerogel composites, and the like may be improved by the addition of opacifiers to reduce the radiative component of heat transfer. Such aerogel materials, aerogel composites, and the like may also be treated to impart or improve hydrophobicity. Such aerogel materials and methods of manufacturing the same are described.

The invention relates to the technical field of industrial waste resource utilization, and discloses a method for preparing an alpha-Fe2O3 byproduct polysilicate aluminum ferric material through industrial waste collaboration.The method comprises the steps that copper slag and red mud are evenly mixed and ground, and a mixture A is obtained; adding waste alkali liquor into the mixture A to obtain a solid-liquid mixture B; carrying out alkalization roasting on the solid-liquid mixture B, then carrying out ultrasonic reaction and carrying out solid-liquid separation to obtain a solid precipitate C and a filtrate D; adding hydrogen peroxide into the solid precipitate C, and calcining to obtain a solid E; grinding the solid E, blending into ore pulp, and carrying out magnetic separation on the ore pulp to obtain alpha-Fe2O3 and mineral active micro powder F; and reacting the filtrate D under an acidic condition, and curing to finally obtain the polysilicate aluminum ferric material. According to the method, the copper slag, the red mud and the waste alkali liquor in the iron-containing solid waste are used as raw materials to replace pure chemical reagents to prepare the high-added-value material, the problems that the existing solid waste / liquid utilization rate is low, the disposal cost is high and the like are solved, and value-added utilization of the iron-containing solid waste and the waste alkali liquor is achieved.

Processes and apparatuses for degrading PFAS into calcium fluoride, carbon dioxide, and water. PFAS are heated and introduced to a calcium base which will degrade the PFAS. The PFAS may be in a stream that is a PFAS enriched stream formed by desorbing the PFAS from an adsorbent which removed the PFAS from a contaminant stream. The PFAS may be desorbed in the presence of the calcium base. The calcium base may be calcium hydroxide, calcium oxide, calcium carbonate, or combinations thereof.

The invention provides a polysilicate aluminum zirconium coagulant as well as a preparation method and application thereof, and relates to the technical field of solid waste recycling. The preparation method of the polysilicate aluminum zirconium coagulant comprises the following steps: S1, activation preparation of a polysilicate solution; S2, introduction and pre-complexation of a metal salt solution; and S3, alkalization induced polymerization and curing. According to the invention, the efficient charge neutralization capability of zirconium and aluminum metal ions and the long-chain network structure characteristic of polysilicic acid are organically combined through a copolymerization reaction by molecular design, the developed polysilicate aluminum zirconium coagulant can maintain a good coagulation effect in a wide pH range, is suitable for treating residual sludge with different sources and properties, and has a good coagulation effect under the dosage of 7.5%. The CST value is reduced to 35.4 s from 190.7 s, the water content of a filter cake is reduced to 77.4%, and the Zeta potential is-8.2 mV, so that the polysilicate aluminum ferric coagulant is obviously superior to a traditional polysilicate aluminum ferric coagulant, and has the advantages of high operation flexibility, good process stability and good application prospect.

Disclosed is a process for preparing a high silica Y-zeolite by utilizing a waste silica source. The method comprises the following steps: preparing a dilute nucleating agent, and preparing a thick nucleating agent by mixing sodium silicate, sodium aluminate, deionized water and sodium hydroxide. Furthermore, an aluminosilicate gel is prepared by mixing the dilute nucleating agent with sodium silicate, aluminum sulfate, deionized water and the thick nucleating agent, and then the aluminosilicate gel is crystallized, filtered and washed to obtain a Y-zeolite filter cake. The Y-zeolite is ammonium exchanged, dried and calcined to obtain a high silica Y-zeolite.