789results about "Aluminium silicates" patented technology

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.

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 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 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.

This application relates to the technical field of comprehensive utilization of fly ash, and specifically discloses a method for extracting alumina from solid waste fly ash. The extraction of the alumina successively undergoes raw material calcination and digestion, desilication treatment of the digested slurry, refining and crystallization of the mother liquor, and roasting and decomposition; among them, the desilication treatment of the digested slurry includes the following steps: adding a desilication agent to the digested slurry, heating for treatment, and filtering to obtain the carbonation mother liquor; the desilication agent is prepared by mixing raw materials in the following mass parts: 65-75 parts of deionized water, 30-40 parts of active desilication powder, 0.5-0.8 parts of dispersant, and 0.2-0.3 parts of stabilizer, and the active desilication powder is obtained by intercalating and compounding modified nano-sodalite and modified kaolin; by using the desilication agent of this application to treat the fly ash mixed raw meal, the removal rate of silicon dioxide in the digested slurry can reach ≥90.37%, and the purity of alumina in the product can reach more than 97.7%.

The invention provides a chitosan composite material and a compound feed additive, and relates to the technical field of feed additives. The chitosan composite material comprises cross-linked chitosan and a porous carrier, the cross-linked chitosan is coated on the surface of the porous carrier; the porous carrier comprises a first porous carrier and a second porous carrier, the average particle size of the first porous carrier is 80-150 [mu] m, and the average particle size of the second porous carrier is 10-30 [mu] m. The chitosan composite material disclosed by the invention has relatively good heavy metal ion adsorption performance and can be used as a feed additive.

A hybrid catalyst for simultaneous dehalogenation and cracking of plastic derived oil includes a plurality of composite particles, wherein each of the composite particles includes red mud particles and beta zeolite particles. A process for upgrading plastic derived oil includes contacting the plastic derived oil with the hybrid catalyst. A system for upgrading plastic derived oil includes an FCC reactor containing the hybrid catalyst.

Provided are a positive electrode active material and a preparation method therefor, a positive electrode sheet, a battery, and an electric device. The positive electrode active material comprises Na4-aAbFe3-cBd(PO4)2-eDf(P2O7), wherein A comprises at least one of Li and K, B comprises a metal element, D comprises at least one of a halogen anion, a silicate ion, a sulfate ion, or a borate ion, -0.12≤a≤0.12, b≥0, 0≤c≤0.3, d≥0, f>0, and 0<e≤0.1.

The invention belongs to the technical field of biological agents and sewage treatment, and particularly relates to application of priesta aryabhattai ZZRQ1 (Priesta aryabhattai) ZZRQ1 and zeolite modified by the priesta aryabhattai ZZRQ1 in nitrogen-containing sewage treatment. According to the present invention, the P.adami ZZRQ1 has efficient heterotrophic nitrification performance, and can effectively remove NH4 < + >-N in the natural water body; the modified zeolite is used as a microbial carrier, the specific surface area of the zeolite can be increased through modification, the number of functional groups on the surface of the carrier is increased, the ammonia nitrogen removal capacity of the carrier is improved, more attachment interfaces are provided for microorganisms, and the adsorption performance of the modified zeolite is combined with the degradation performance of the Prussella aryabhattai ZZRQ1, so that the degradation performance of the Prussella aryabhattai ZZRQ1 is improved. Compared with unmodified zeolite, the modified zeolite has better capability of removing ammonia nitrogen in sewage.

The present invention provides a modified silica aerogel powder having a higher water repellency and a larger contact angle, and a method for producing the same. At the same time, the present invention provides an aerogel slurry having a lower thermal conductivity and a method for producing the same. The present invention also provides a method for producing an aerogel insulating felt having low thermal conductivity, high mechanical strength, and capable of relatively well resolving the problem of powder shedding. The method for producing the modified silica aerogel powder includes the steps of (1) modifying halloysite nanotubes with dodecyl methacrylate and pentafluorophenyl methacrylate, (2) preparing a silica sol, (3) adding the modified halloysite nanotubes to the silica sol to prepare a wet gel, and (5) preparing the wet gel into the modified silica aerogel powder. The present application also provides a method for producing an aerogel slurry from the modified silica aerogel powder, and a method for producing an aerogel insulating felt from the aerogel slurry.

Methods and compositions herein relate to producing an aluminosilicate aerogel. The method may include receiving a silica precursor in solvent, hydrolyzing the silica precursor to produce colloidal silica, introducing an aluminum compound to the colloidal silica to produce a colloidal aluminosilicate suspension, converting the aluminosilicate suspension to an aluminosilicate gel composition, and forming the aluminosilicate aerogel by extracting fluid.

The invention discloses a waste sulfuric acid treatment method and device, the device comprises a sintered filter element filter, a fine filtration coalescer, an adsorption tank and a membrane separator which are connected in sequence, and the fine filtration coalescer adopts a ceramic membrane tube or a polytetrafluoroethylene membrane tube or a silicon carbide lining membrane tube as a filter material; an adsorption material in the adsorption tank is one or a combined adsorption material of more than two of activated carbon, a modified molecular sieve, a metal organic framework material and a nano adsorption material; and the membrane separation system adopts one or a combined membrane of more than two of an ultrafiltration membrane, a reverse osmosis membrane and an electrodialysis membrane. The alkylation waste acid regeneration process can be simplified, the occupied area of the device is saved, the engineering investment is reduced, and the operation cost is greatly reduced compared with that of an existing process technology; according to the method, a physical separation means is adopted, organic polymeric oil, dissolved organic matters, dissolved salts and other impurities in the alkylated waste sulfuric acid can be effectively removed without decomposing and reconstructing the waste sulfuric acid, and the concentrated sulfuric acid after concentration completely meets the production requirements of an alkylation device.

The present invention belongs to the technical field of catalytic materials and relates to a silicon-aluminum material, its preparation and a low-coking, high-activity heavy oil conversion catalytic cracking catalyst. The silicon-aluminum material has an anhydrous weight chemical formula of (0-1)Na2O·(15-50)Al2O3·(85-50)SiO2, a most probable pore diameter of 10-100 nm, and a specific surface area of ​​150-600 m 2 / g, a pore volume of 0.5-1.5 ml / g, and a pore volume of pores with a pore diameter greater than 10 nm accounting for 70%-98% of the total pore volume. Its preparation method comprises the steps of adding an alkaline silicon source to an acidic aluminum source, contacting with a base, and washing. The low-coking, high-activity heavy oil conversion catalytic cracking catalyst contains the aforementioned silicon-aluminum material and an in-situ crystallized Y-type molecular sieve. The catalytic cracking catalyst has good coke selectivity.

The invention belongs to the technical field of adsorbents, and particularly relates to a lanthanum ion modified zeolite adsorbent as well as a preparation method and application thereof. Compared with the prior art, the method has the advantages that sodium ions are used for replacing aluminum ions which are originally large in size in the artificial zeolite to enable the salt-modified artificial zeolite material to have higher surface activity, then high-temperature calcination is used for removing impurities which are firmly combined with a pore channel structure in the artificial zeolite material, and the surface activity of the material is further improved; lanthanum in the lanthanum ion modified zeolite adsorbent exists in the form of lanthanum oxide after the lanthanum ion modified zeolite adsorbent is calcined, the surface of the lanthanum ion modified zeolite adsorbent is in an electron-deficient state and is expressed as Lewis acid, the lanthanum ion modified zeolite adsorbent is combined with water molecules to form hydrated oxide, and the hydrated oxide can generate electrostatic adsorption with phosphate ions to generate a complex; the method realizes efficient adsorption of phosphorus and fixation of phosphorus in sediments, so that the effect of removing phosphate radicals in the water body is achieved, the material cost is low, and the method has a good application prospect in the aspects of eutrophication treatment and emergency treatment of the water body.

The invention relates to a fast ion conductor-stabilizer composite coated lithium manganese iron phosphate material as well as a preparation method and application thereof. The lithium manganese iron phosphate material comprises a lithium manganese iron phosphate inner core and a coating layer on the surface of the lithium manganese iron phosphate inner core, the coating layer is obtained by mixing sodium aluminosilicate, magnesium metaaluminate, a coating carbon source and a lithium supplement agent, coating the surface of the lithium manganese iron phosphate inner core with the mixture, and performing sintering treatment. According to the invention, sodium aluminosilicate and magnesium metaaluminate are combined with conductive carbon to carry out co-coating treatment on lithium manganese iron phosphate, and in a high-temperature sintering process, part of Na < + > / Al < 3 + > / Mg < 2 + > multi-ions are co-embedded into a near surface layer of a lithium manganese iron phosphate crystal, so that a unit cell structure which is more stable in structure and easier in Li < + > diffusion is formed. In the high-temperature sintering process, part of magnesium metaaluminate reacts with the lithium supplement agent to form an Al-based fast ion conductor, and sodium aluminosilicate has a wider Li < + > diffusion channel, so that the material has excellent rate capability.