449 results about "Modified zeolite" patented technology

The invention discloses a preparation method of capillary crystalline self-repairing concrete, which comprises the following steps: adding zeolite powder into a urease solution for dipping treatment to obtain pretreated zeolite powder; adding the pretreated zeolite powder into a mixed solution A containing urea and sodium alginate, adding a calcium chloride solution A, and separating a solid phase to obtain coated zeolite powder; fumed silica is added into a magnesium chloride solution to be mixed, polyethylene glycol is added, ultrasonic dispersion is conducted, and dispersion liquid is obtained; mixing the coated zeolite powder with the dispersion liquid, adding a sodium alginate solution, mixing, adding a calcium chloride solution B, and separating a solid phase to obtain modified zeolite powder; mixing preparation raw materials including the modified zeolite powder, the cement, the fly ash, the polycarboxylic acid water reducing agent and the aggregate to obtain the concrete. The concrete prepared through the method is good in crack self-repairing effect and good in mechanical strength, and the durability and the service life of the concrete can be improved easily.

The invention relates to injectable hydrogel for rapid hemostasis and antibiosis of an oral cavity as well as a preparation method and application of the injectable hydrogel, and the injectable hydrogel comprises the following components in percentage by weight: 5-15% of aminated chondroitin sulfate, 5-15% of oxidized dextran, 1-3% of platelet-rich fibrin and 0.5-1% of quercetin modified zeolite imidazole acid framework nanoparticles. According to the invention, Chs-ADH and ODex are adopted as matrix materials, PRF and ZIF-8 (at) QCT are introduced, the hydrogel is endowed with antibacterial, anti-oxidation and immunoregulation functions, and by optimizing the proportion of the components, the obtained hydrogel has good injectability, stability and degradation resistance, so that the hydrogel can still maintain an effective blood coagulation function in a high-humidity and high-enzymatic-activity oral environment.

The invention provides a mineralization composition as well as a preparation method and application thereof. The mineralization composition comprises modified celestite, modified strontium-containing dolomite, modified medical stone, modified zeolite, modified tourmaline, modified wollastonite and modified serpentine. The strontium ion dissolution amount of the modified celestite is 50 to 55 mg / L; the strontium ion dissolution amount of the modified strontium-containing dolomite is 15 to 20 mg / L; the metasilicate ion dissolution amount of the modified medical stone is 30 to 35 mg / L; the metasilicate ion dissolution amount of the modified zeolite is 40 to 45 mg / L; the metasilicate ion dissolution amount of the modified tourmaline is 3 to 5 mg / L; the dissolution amount of metasilicate ions in the modified wollastonite is 3 to 5 mg / L; the dissolution amount of metasilicate ions in the modified serpentine is 10 to 15 mg / L. The mineralization composition can stably and enduringly release strontium ions and metasilicate ions, and also can adjust the water quality to alkalescence, so that the water quality reaches the national drinking water standard, and safe and healthy drinking water can be provided for users.

The invention discloses a method for preparing a soil conditioner based on infrared activation of coal gangue. The method comprises the following steps: S1, preparing activated coal gangue; s2, mixing the activated coal gangue with a slow-release fertilizer and modified zeolite, performing extrusion granulation to obtain basic particles, diluting a long-acting composite microbial inoculum with deionized water to obtain a microbial inoculum suspension, spraying the microbial inoculum suspension on the surfaces of the basic particles in a low-temperature spraying manner, and performing low-temperature drying to obtain a core material; s3, mixing the activated coal gangue with kaolin, humic acid, calcium hydrogen phosphate, sodium alginate and water to obtain coating slurry, and coating the core material with the coating slurry to obtain a shell-core material; s4, mixing the modified activated coal gangue with polyvinyl alcohol, talcum powder, a composite additive and water to obtain outer coating slurry, and coating the outer coating slurry on the core-shell material to obtain the soil conditioner. According to the method, the coal gangue is subjected to infrared activation treatment and then prepared into the soil conditioner with a high additional value, and waste resource utilization is achieved.

The invention relates to the technical field of wastewater treatment, and provides a pretreatment device and method for wastewater containing heavy metal ions, and the pretreatment device comprises a water inlet unit, a multi-stage reaction unit, a solid-liquid separation unit, a deep adsorption unit and an intelligent control unit; the water inlet unit comprises a wastewater storage pool and a pH adjusting pool, and the pH adjusting pool is provided with a pH sensor and a dosing device; the multi-stage reaction unit consists of three rotational flow reaction tanks which are connected in series, and spiral guide plates are arranged in the tanks to enhance mixing; the solid-liquid separation unit comprises an inclined plate sedimentation tank and a centrifugal filter; a sludge return pipe is arranged at the bottom of the inclined plate sedimentation tank and extends to the reaction tank; the deep adsorption unit is filled with a modified zeolite-activated carbon composite adsorbent, and a heavy metal ion concentration online monitor is arranged at the rear end; the intelligent control unit dynamically adjusts the dosage and the reaction time based on pH and concentration data. The device has the beneficial effects that the mixing efficiency of wastewater treatment is enhanced, the pH application range of wastewater treatment is widened, and the cost is reduced.

The invention provides a salt-tolerant plant constructed wetland system for treating eutrophicated mariculture wastewater, which specifically comprises a lower filler formed by mineral materials, and a middle filler formed by modified zeolite, sodium alginate coated vermiculite, rice husk charcoal, oyster shell, coral sand and diatomite, the surface filler is composed of intertidal zone bottom mud, intertidal zone raw water, coastal saline-alkali soil and composite algae powder, and the three fillers are combined with salt-tolerant plant breeding, bow-shaped water flow optimization and layered collaborative design; the core problems of poor salt tolerance, low adsorption efficiency, easiness in blockage, high maintenance cost and the like of the traditional constructed wetland during treatment of the mariculture wastewater are systematically solved.

The invention provides a VOCs catalyst as well as a preparation method and application thereof, and belongs to the field of atmosphere prevention and control. The invention provides a VOCs (Volatile Organic Compounds) catalyst. The VOCs catalyst comprises a modified ZSM-5 zeolite molecular sieve and active metal and / or oxide of the active metal loaded on the modified ZSM-5 zeolite molecular sieve, the preparation method of the modified ZSM-5 zeolite molecular sieve comprises the following steps: mixing a ZSM-5 zeolite molecular sieve and an organic alkali solution, and carrying out a hydrothermal reaction to obtain an organic alkali-loaded ZSM-5 zeolite molecular sieve; and roasting the ZSM-5 zeolite molecular sieve loaded with the organic alkali, and removing the organic alkali to obtain the modified ZSM-5 zeolite molecular sieve, the organic alkali solution is a tetrapropylammonium hydroxide solution.

The invention belongs to the technical field of environmental rock soil, and particularly relates to a preparation method of zeolite-magnetic iron oxide and application of the zeolite-magnetic iron oxide in catalyzing sodium percarbonate to repair petroleum hydrocarbon polluted soil. The specific method comprises the following steps: carrying out alkali treatment on zeolite, and then carrying out heat treatment to obtain alkali-heat combined modified zeolite; extracting an iron element in the iron-containing by-product with acid and preparing ferric hydroxide colloid; and uniformly mixing the alkali-heat combined modified zeolite with the ferric hydroxide colloid, carrying out solid-liquid separation, and then carrying out heat treatment and hydrogen reduction treatment to obtain the zeolite-magnetic iron oxide, the application specifically comprises the following steps: uniformly mixing sodium percarbonate, tween-80, silica sol and water to prepare a turbid solution A; uniformly mixing zeolite-magnetic iron oxide, organic acid, silica sol and water to prepare a turbid solution B; and uniformly mixing the turbid liquid B with the petroleum hydrocarbon polluted soil, then adding the turbid liquid A, uniformly mixing, and maintaining for 12-15 days to finish the remediation.

The present application relates to wastewater treatment technical field, specifically to a kind of ammonia nitrogen wastewater treatment method, the composite modified zeolite material in the present application has excellent physical adsorption capacity to ammonia nitrogen by virtue of its unique pore structure and surface properties, ammonia nitrogen molecules in wastewater can be quickly captured, then through the synergistic effect of composite photocatalyst under light and ultrasonic, strong oxidizing free radicals are generated, ammonia nitrogen molecules not completely adsorbed by zeolite material are deeply degraded, through the synergistic effect of adsorption and photocatalysis, the removal efficiency of ammonia nitrogen is significantly improved;After adsorption and photocatalytic treatment, the ammonia nitrogen concentration in wastewater has been greatly reduced, and resin adsorption treatment is used as a subsequent step, which can selectively adsorb residual trace amounts of ammonia nitrogen and other impurities, thereby realizing deep purification of wastewater and ensuring that the effluent quality meets or exceeds relevant discharge standards.

The invention relates to the technical field of wastewater treatment, in particular to an ammonia-nitrogen wastewater treatment method.A composite modified zeolite material has excellent physical adsorption capacity on ammonia nitrogen by means of the unique pore structure and surface property of the composite modified zeolite material, ammonia nitrogen molecules in wastewater can be rapidly captured, and the ammonia nitrogen wastewater treatment effect is improved. Then, under the synergistic effect of illumination and ultrasonic waves, free radicals with strong oxidizing property are generated through the composite photocatalyst, ammonia nitrogen molecules which are not completely adsorbed by the zeolite material are deeply degraded, and the removal efficiency of ammonia nitrogen is remarkably improved through the synergistic effect of adsorption and photocatalysis; after adsorption and photocatalysis treatment, the concentration of ammonia nitrogen in the wastewater is greatly reduced, then resin adsorption treatment is adopted as a subsequent step, and residual trace ammonia nitrogen and other impurities can be selectively adsorbed, so that deep purification of the wastewater is realized, and the effluent quality is ensured to reach or be superior to related emission standards.

The invention discloses a metal-doped modified zeolite molecular sieve adsorbent as well as a preparation method and application thereof. The metal-doped modified zeolite molecular sieve adsorbent comprises a carrier and an active metal component loaded on the carrier, the carrier is a mordenite molecular sieve; the active metal components comprise at least two of Ca, Mg, Ti, Fe, Ni, Co, Cu, Zn, Na and Ag; in the adsorbent, the loading capacity of the active metal component is 0.1%-15%. The adsorbent provided by the invention has good separation performance on CH4 / CO2, CH4 / N2, CO2 / N2 and CH4 / CO2 / N2 mixed gas separation systems, has the advantages of simple synthesis method, strong hydrothermal stability, high selectivity and the like, and can meet the requirements of CH4 purification in unconventional natural gas such as landfill gas, sewage treatment methane gas, agricultural and breeding biogas, coal bed gas, shale gas and shallow biogas, and the like. And the requirements of high-concentration natural gas denitrification, CO2 capture and other scenes can be met.

The invention relates to the technical field of building materials, in particular to light water-resistant phosphogypsum-based cement concrete mortar and a preparation process thereof. The phosphogypsum-based cement concrete mortar comprises the following components: activated phosphogypsum, sulphoaluminate cement, magnesium phosphate cement, modified zeolite powder, lightweight aggregate, modified nano silicon dioxide, a core-shell toughening agent, a polycarboxylate superplasticizer and water, and the preparation method comprises the following steps: respectively preparing the activated phosphogypsum, the modified zeolite powder, the modified nano silicon dioxide and the core-shell toughening agent; the water resistance of the ardealite is improved through activating treatment, the interface bonding force and the structural compactness are enhanced through multi-component synergism by means of selective adsorption of the modified zeolite powder, the mechanical property of the lightweight aggregate is optimized, the toughness is improved through the core-shell toughening agent, and lightweight, high water resistance, stable performance and durability improvement of the mortar are achieved; the requirements of complex building scenes are met, and environment-friendly and practical values are achieved.

The invention provides a preparation method of a catalyst, the catalyst and a diethyltoluenediamine synthesis method based on the catalyst, and belongs to the technical field of chemical synthesis. After the surface of phosphoric acid modified zeolite is coated with aluminum oxide, a layer of quantum dot intercalation metal layered oxide is coated, the surface is modified by polydopamine, citric acid is coupled, cerium oxide and ruthenium oxide are loaded, and the catalyst is prepared. The prepared catalyst can well improve the conversion rate of toluenediamine, inhibit side reactions, improve the anti-coking capability, reduce the generation of carbon deposits, prevent the agglomeration of catalyst particles, prolong the service life, improve the mechanical strength and thermal stability, reduce the activation energy in the synthesis process of diethyltoluenediamine, make the reaction conditions milder, make the yield higher, and reduce the production cost. And the method can be repeatedly used and has a wide application prospect.

The invention provides a cultivation method of ornamental small ginger, and relates to the field of plant cultivation, and the method comprises the following steps: tissue culture seedling cultivation: adopting a culture medium comprising a basic culture medium, a plant growth regulator, an organic additive, an antioxidant and trace elements for cultivation to obtain tissue culture seedlings. Performing potting cultivation: transferring the tissue culture seedlings into a potting container on which a mixed substrate is uniformly laid, and performing cultivation, wherein the mixed substrate comprises charcoal particles, modified zeolite particles, a mycorrhizal fungus inoculant, gelatin slow-release particles, fermented soybean meal and graphene modified cellulose; in the cultivation process, irrigation, fertilization and environment regulation and control are carried out regularly. According to the method, high-quality tissue culture seedlings are obtained by using a culture medium with specific components, and growth balance of ginger plants is adjusted and overgrowth of the plants is inhibited by adjusting a planting matrix and regulating and controlling a specific culture method, so that small potted ginger plants for ornamental use are obtained.

The invention relates to the technical field of lithium ion battery fire extinguishing agents, and discloses a compound lithium ion battery fire extinguishing agent and a preparation method thereof.The compound lithium ion battery fire extinguishing agent is prepared from, by mass, 30-35 parts of vermiculite, 5-7 parts of fire extinguishing filler, 6-8 parts of modified zeolite, 0.5-1 part of a stabilizer, 1.5-2 parts of a dispersing agent, 1-2 parts of a thickening agent, 1-3 parts of a foaming agent and 40-50 parts of water. The fire extinguishing filler can form a barrier layer on the surface of the battery to prevent oxygen and heat transfer and achieve the fire extinguishing purpose, and starch and polydopamine in the fire extinguishing filler can form compact carbon layers, so that wrapped combustible molecules are distributed among the carbon layers, oxygen is further isolated, and the fire extinguishing efficiency is improved; the modified zeolite can complete fire extinguishing through a physical and chemical synergistic effect, and can form silicon dioxide to be distributed on the surface of the zeolite in the fire extinguishing process, so that the situation that the zeolite is subjected to thermal shock and thermal stress to cause collapse of a zeolite framework and influence the fire extinguishing performance is avoided.

The invention belongs to the technical field of denitration agents, and particularly discloses a composite denitration agent for an out-of-furnace phase change process and a preparation method of the composite denitration agent. The preparation method comprises the following steps: mixing 60-80 parts of urea, 20-30 parts of a hydrolysis accelerant and 5-15 parts of amino modified zeolite to obtain the composite denitration agent for the external phase change process; the hydrolysis accelerant is coated ammonium carbamate, and the amino-modified zeolite is obtained by modifying an amino-containing silane coupling agent. The prepared composite denitration agent can promote forward proceeding of urea hydrolysis, the conversion rate of urea is increased, and the ammonia yield is increased; the amino modified zeolite can adsorb and activate urea molecules, urea decomposition is transferred to a low temperature, the activation energy of urea decomposition is remarkably reduced, and the reaction rate is increased.

The invention relates to the field of agricultural microbial fertilizers, and discloses a composite biological bacterial fertilizer for promoting yield increase of kidney beans, which is prepared from chitosan modified zeolite, salt-tolerant growth-promoting bacteria, potassium-solubilizing and phosphate-solubilizing bacteria, plant signal bacteria and humic acid. The modified zeolite loads potassium ions, adsorbs redundant Na < + >, slowly releases potassium nutrients and adjusts the K < + > / Na < + > ratio of rhizosphere; the flora synergistically acts to secrete betaine, IAA and other substances, salt stress is relieved, and root development is promoted; the humic acid improves the soil structure and improves the water and fertilizer retention capability. Through a freeze-drying immobilization technology, the activity and durability of the flora are enhanced. The granular design of the bacterial fertilizer realizes slow release of nutrients and microorganisms, and improves the fertilizer efficiency and the application convenience. The saline-alkali soil conditioner is suitable for saline-alkali soil agricultural production, and has the effects of improving soil, relieving salt stress and promoting crop yield increase.

The invention provides a VOCs gas purification system and method, and relates to the technical field of waste gas treatment.The system comprises a pre-filter, a modified zeolite rotating wheel, a UV photolysis oxidation unit, a target sensor, an intelligent controller and a draught fan, the pre-filter is used for filtering out particulate matter larger than 0.3 micrometer in gas to be purified; the modified zeolite rotating wheel is used for adsorbing part of VOCs gas in the filtered gas and heating and desorbing the adsorbed part of VOCs gas into the storage tank; the UV photolysis oxidation unit is used for performing photodegradation treatment on residual VOCs gas in the gas subjected to adsorption treatment to obtain purified tail gas; the target sensor is used for monitoring target concentration data of the VOCs gas, and the intelligent controller intelligently controls the air volume of the fan based on the target concentration data. By implementing the technical scheme provided by the invention, the effects of saving energy and reducing energy consumption are achieved.

The invention belongs to the technical field of vegetable culture media, and relates to a leaf vegetable culture medium with pepper seed meal as a raw material and a preparation method thereof.The leaf vegetable culture medium is prepared by mixing and stirring pepper seed meal leavening, regenerated old media, activated coco coir powder, bamboo fiber charcoal powder, modified diatomite, modified zeolite powder and an adhesive according to the mass ratio of (8-12): (4-8): (2-4): (1-3): (3-7): (1-3): (1-3); placing for 2-3 days in an environment with the humidity of 70-80% and the temperature of 40-50 DEG C, then drying until the water content is less than or equal to 8%, and sterilizing to obtain the leafy vegetable culture medium. The Chinese prickly ash seed meal is used as a main raw material, and combined with compound bacteria fermentation, old substrate regeneration, functional material modification and waste high-value treatment, the defects of an existing substrate in the aspects of environmental friendliness, nutrient release, recovery rate, water and fertilizer retention capacity and the like are systematically overcome.

The invention relates to the technical field of concrete, and particularly discloses low-temperature-resistant self-repairing waterproof concrete for water conservancy and a preparation method of the low-temperature-resistant self-repairing waterproof concrete. The water conservancy low-temperature-resistant self-repairing waterproof concrete is specifically prepared from the following components in parts by weight: 70 to 80 parts of cement, 10 to 20 parts of fly ash, 8 to 12 parts of silica fume, 2.5 to 3.5 parts of a reinforcing material, 0.2 to 0.4 part of a crystallization inducer, 1.5 to 2.5 parts of a repairing agent and 20 to 40 parts of water, the reinforcing material is formed by mixing nano silica sol, bentonite, quartz sand and triethanolamine; the crystallization inducer is formed by mixing sodium silicate and aluminum hypophosphite; the repairing agent is obtained by loading calcium ions on an amino silane modified zeolite material and then mixing with a bacillus pasteurii bacterial solution. By utilizing the technical scheme provided by the invention, the prepared concrete has excellent mechanical properties, water resistance, impermeability, freezing resistance, crack resistance and good durability.

The invention discloses an impurity removal device and an impurity removal method for salt separation crystallization mother liquor of chemical high-salt wastewater, and belongs to the technical field of comprehensive utilization of water resources. The impurity removal device comprises a high-density sedimentation tank for receiving high-salinity wastewater salt separation crystallization mother liquor; the first-stage reactor is connected with the high-density sedimentation tank through a pipeline; the second-stage reactor is connected with the first-stage reactor through a pipeline; the three-stage reactor is connected with the filtering device through a pipeline, the filtering device is connected with the mesoporous adsorption tower through a pipeline, the mesoporous adsorption tower is connected with the chelating resin tower through a pipeline, and the chelating resin tower is connected with the modified zeolite adsorption tower through a pipeline. The method has the advantages that equipment configuration is reasonable, and good stability and operability are achieved; the method provided by the invention has outstanding process route originality and low treatment cost, and realizes liquid phase treatment and high-valued cyclic utilization of the chemical high-salinity wastewater salt separation crystallization mother liquor.

The invention discloses a feed containing monosodium glutamate by-products and a production method of the feed, and belongs to the technical field of feeds. The fertilizer is prepared from the following raw materials in parts by weight: 60-100 parts of distillers' grains, 20-40 parts of corn sugar residues, 5-12 parts of monosodium glutamate wastewater, 3-8 parts of microbial zymophyte, 15-40 parts of water, 4-10 parts of a traditional Chinese medicine preparation and 8-16 parts of a carrier, wherein the carrier is modified zeolite composite particles. According to the prepared feed containing the monosodium glutamate by-product, recycling of resources is achieved, the storage stability of the feed is improved, the shelf life of the feed is prolonged, meanwhile, the immune antitoxic ability of animals can be improved, and animal growth can be promoted.

The application relates to the technical field of fluorine-containing wastewater treatment, and discloses a MOF modified zeolite fluorine removal agent as well as a preparation method and application thereof, which comprises the following steps: subjecting natural zeolite to carboxylation or calcination pretreatment; preparing a MOF precursor; the MOF precursor is prepared from at least two kinds of rare earth metal ions in La 3+ , Ce 3+ or Zr 4+ and an organic ligand; adding the MOF precursor into a DMF solvent, then adding the pretreated natural zeolite, and ultrasonic treatment for 5-10 min; adding the obtained mixed solution into a high-pressure reaction kettle, and reacting at 160 DEG C for 24 h; after the high-pressure reaction kettle is naturally cooled, the mixed solution in the high-pressure reaction kettle is centrifuged, the precipitate is washed with DMF for 3-5 times, and then dried at 65-90 DEG C for 18-24 h, so that the MOF modified zeolite fluorine removal agent is finally obtained. The disclosed fluorine removal agent has larger pore volume and specific surface area, and has good fluorine removal effect.

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 invention discloses a production process of a high-potassium-based compound fertilizer, which comprises the following steps: S1, raw material pretreatment: crushing potassium feldspar to 200 meshes, mixing with 5% sulfuric acid according to a mass ratio of 1: 3, calcining at 120-130 DEG C for 2-3 hours, washing with water until the pH is 6.5-7.0, and drying to obtain potassium feldspar activated powder; s2, putting a potassium citrate solution, a calcium citrate solution, potassium feldspar activated powder, a trace element organic acid salt solution, urea, modified zeolite and a binder into a high-speed mixer in proportion, uniformly stirring, and granulating by adopting a high tower to obtain base material particles; s3, the base material particles are dried, broken particles with the diameter smaller than 2.5 mm are removed, multiple layers of composite films are sprayed to the surfaces of the base material particles for coating, and coated base material particles are obtained after drying; and S4, spraying a bacillus subtilis microbial agent on the surfaces of the coated base material particles, and drying at low temperature to obtain the high-potassium-based compound fertilizer. The high-potassium-based compound fertilizer produced by the invention has the advantages of high nutrient content, long fertilizer efficiency and small environmental pollution, and can improve the soil environment and increase the crop yield.

The invention relates to the technical field of fabrics, in particular to a cool-feeling long cilia strip and a preparation method thereof.The cool-feeling long cilia strip is composed of cool-feeling fibers and a long cilia strip base material and is characterized in that the cool-feeling fibers comprise a core layer, a functional skin layer and an outer thin skin layer; the functional skin layer is prepared from the following components: a sulfonated copolyester matrix, catechol grafted master batch, surface modified zeolite nano powder, an anti-hydrolysis agent and an antioxidant, and the functional skin layer also contains introduced Zn < 2 + > and Mg < 2 + >. Zn < 2 + > and Mg < 2 + > which are stably combined on anchoring points of sulfonated copolyester are subjected to hydration endothermic reaction when being in contact with water, so that a cool feeling is generated; the surface modified zeolite nano powder synergistically enhances moisture absorption and water temporary storage by virtue of the specific surface area, and continuously provides water for an ionized hydration reaction to prolong and amplify a cool feeling effect; the catechol grafting structure endows the fiber with antibacterial performance, and long-term stability of the structure is ensured through an interface enhancement effect. And the outer layer hydrophilic polyester is matched, so that the product has comfort, durability and functionality.

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.

A modified zeolite material used for removing metal impurities from an organic solvent composition; the modified zeolite material comprising (i) a hydrogen-based zeolite having hydrogen functionalities, (ii) an ammonium-based zeolite having ammonium functionalities, or (iii) a combination of a hydrogen-based zeolite having hydrogen functionalities and an ammonium-based zeolite having ammonium functionalities; the zeolite material containing a pore size of from 3 Å to 20 Å; and the zeolite material selectively removing metal impurities present in the solvent, to an impurity content of less than 1 ppb; a process for preparing the above modified zeolite material; and a process for removing contaminants from organic solvents using the above modified zeolite material.

The invention relates to the technical field of petrochemical engineering, in particular to a continuous production method of high-stability N-methyldiisopropanolamine. The method comprises the following steps: heating and reacting methylisopropanolamine and propylene oxide under the action of a specific catalyst to generate an N-methyldiisopropanolamine crude product; then adding the crude product into a rectifying tower, and extracting a high-purity N-methyldiisopropanolamine product from a side line at the middle upper part; the used catalyst is citric acid modified zeolite loaded copper-chromium bimetal. According to the production method disclosed by the invention, by optimizing an active site structure and a rectification separation path of the catalyst, efficient and stable operation of a reaction process is realized, and the thermal stability of a final product is remarkably improved.

The invention belongs to the technical field of waste gas treatment, and particularly relates to a method for preparing a hierarchical pore modified zeolite adsorbent from lithium silicon powder and application of the hierarchical pore modified zeolite adsorbent. The method comprises the following steps: grinding and sieving, pickling and impurity removal, gel crystallization, filtering and washing, and zeolite modification. The lithium silicon powder is used as a main raw material, acid pickling, crystallization, washing and modification are combined, and the obtained hierarchical pore modified zeolite adsorbent has the advantages of being large in specific surface area, high in porosity, high in adsorption rate, high in capacity, good in thermal stability and high in regeneration capacity; the preparation method is simple in process, easy to operate and low in cost, and the prepared hierarchical porous modified zeolite is used for adsorbing VOCs, is high in adsorption efficiency and can be regenerated and recycled, so that the VOCs treatment cost is further reduced.