1380 results about "Acid treatment" patented technology

The invention discloses a composite electrode material for removing uranium through photoelectrocatalysis and a preparation method and application of the composite electrode material, and belongs to the technical field of catalytic materials and wastewater treatment.The preparation method of the composite electrode material comprises the following steps that a ZIF-8 material, copper salt and ferric salt are mixed, and a first metal composite material is prepared; reacting the first metal composite material with a KOH solution to prepare a second metal composite material; carrying out carbonization treatment on the second metal composite material, and then carrying out acid treatment by using acid to obtain a bimetallic atom catalytic material; the preparation method comprises the following steps: dispersing a bimetallic atom catalytic material and a g-C3N4 material in a mixed solution containing phytic acid and a Nafion solution to obtain catalyst ink; and coating the catalyst ink on a substrate, and carrying out illumination drying to obtain the composite electrode material. According to the composite electrode material, under the synergistic effect of the bimetallic single atomic cluster catalyst and g-C3N4, respective advantages are fully exerted, and efficient deposition removal of uranium is achieved.

The invention discloses a glass fiber reinforced epoxy resin composite material and a preparation method thereof, and relates to the technical field of composite materials, and the preparation method comprises the following steps: carrying out organic solvent immersion treatment, cleaning and drying on glass fibers to obtain pretreated glass fibers; respectively carrying out phytic acid modification treatment on the pretreated glass fibers and hollow alumina microspheres; performing plasma surface treatment on the glass fibers and the hollow aluminum oxide microspheres subjected to the phytic acid modification treatment; mixing and dispersing epoxy resin, a curing agent, the glass fibers subjected to plasma surface treatment and the hollow aluminum oxide microspheres according to a preset mass ratio; carrying out vacuum degassing on the mixture; and injecting the degassed mixture into a mold for step-by-step curing. The preparation method has the beneficial effects that active groups are introduced to the surfaces of the glass fibers through phytic acid treatment, the number of the active groups is further increased by combining plasma surface treatment, and the interface bonding capacity of the glass fibers and an epoxy resin matrix is remarkably improved.

The invention belongs to the field of coal gangue resource utilization, and particularly discloses a method for separating and recovering silicon and aluminum elements from coal gangue. The coal gangue is used as a raw material, and efficient resource utilization of the coal gangue is realized through crushing and ball milling, high-temperature roasting activation and acid-base combined treatment. The coal gangue is subjected to high-temperature fluorination roasting by adopting an activating auxiliary agent fluorinating agent to form soluble fluosilicate (H2SiF6) and a fluorine-aluminum compound (AlF3), so that the subsequent silicon-aluminum separation is obviously promoted. The method comprises the following steps: desiliconizing through alkali treatment, leaching and converting silicon in the coal gangue into sodium silicate, and carrying out solid-liquid separation to obtain sodium silicate filtrate and aluminum-rich leaching residues; and then acid treatment is conducted on the aluminum-rich leaching residues, aluminum salt or aluminum hydroxide is prepared, and finally efficient separation of silicon and aluminum is achieved. According to the method, through high-temperature activation roasting, the normal-pressure alkaline leaching desiliconization effect is improved, the acid extraction aluminum efficiency is remarkably improved, the advantages of an acid method and an alkaline method are effectively combined, and the problems that coal gangue resources are difficult to utilize and the resource recovery rate is low are solved.

The invention relates to a preparation method of a cobalt-free single crystal lithium-rich positive electrode material. The preparation method comprises the following steps: preparing a nickel-manganese oxygen-containing compound precursor from manganese salt and nickel salt by using a solid-phase method or a coprecipitation method; mixing the prepared nickel-manganese oxygen-containing compound precursor with a low-melting-point lithium source, pre-sintering and melting the mixture, performing high-energy ball milling, adding a conventional lithium source once or multiple times during ball milling, and calcining the mixture after ball milling to obtain an initial product of the cobalt-free single crystal lithium-rich positive electrode material; and carrying out acid treatment and secondary calcination on the initial product to obtain the cobalt-free single crystal lithium-rich positive electrode material product. The single crystal lithium-rich material with excellent performance can be prepared with high efficiency and low cost, and has excellent electrochemical performance.

The invention provides a microorganism curing biochar material and a heavy metal sewage treatment method thereof. The microorganism curing biochar material comprises modified biochar, functional microorganisms, an intelligent responsive polymer coating and quantum dots. The high-performance material is prepared through acid treatment, loading of metal oxide modified biochar, compounding with specific functional microorganisms, coating of an intelligent responsive polymer coating and bonding of quantum dots, when heavy metal sewage is treated, all the components have a synergistic effect, the adsorption and conversion capacity is improved, the environmental adaptability is enhanced, real-time monitoring is achieved, and the application prospect is wide. The sewage treatment efficiency and quality are effectively improved; pretreatment is set in the sewage treatment process, and the addition proportion, the reaction temperature, the stirring rotating speed, the reaction time and the like of a microorganism solidified biochar material are reasonably controlled, so that the high removal rate of various heavy metal ions is realized; meanwhile, the microorganism solidified biochar material can be repeatedly used, so that the use of a large number of chemical agents is avoided, the secondary pollution is reduced, and remarkable economic and environmental benefits are brought.

The invention discloses a method for preparing a lithium-copper composite negative electrode by utilizing lithium slag and application, and the preparation method of the negative electrode comprises the following steps: adding the lithium slag with certain concentration after removing impurities such as Ca < 2 + >, Mg < 2 + > and Fe < 3 + > through acid treatment into metal lithium in a molten state, and fully stirring until the reaction is complete; and coating the molten metal lithium obtained after the reaction on a current collector to obtain the modified lithium metal negative electrode plate. The prepared lithium-copper composite negative electrode has a lithium-loving 3D frame structure, volume expansion in the circulation process can be inhibited, lithium oxide, lithium aluminum alloy and lithium silicon alloy existing on the 3D frame structure can serve as lithium-loving sites for uniform lithium ion deposition, lithium dendrite growth is inhibited, and long-term stable circulation of the lithium metal negative electrode is promoted.

The invention relates to a porous carbon material as well as a preparation method and application thereof. The specific surface area of the porous carbon material is 1500-3000m < 2 > / g, and pore channels are intensively distributed in a range of 0.6-2.0 nm. The preparation method of the porous carbon material comprises the following steps: (1) montmorillonite acid treatment; (2) uniformly mixing the acid-treated montmorillonite obtained in the step (1) with asphalt, and carrying out carbonization treatment to obtain a carbonized material; and (3) under the inert atmosphere condition, mixing the carbonized material with an activating agent for activation, and then washing and drying. The porous carbon material obtained by the invention has the advantages of large specific surface area, reasonable pore size distribution, high ion transmission speed and the like, and is a super-capacitor carbon material with excellent rate capability.

The invention provides a high-carbon-layer-strength intumescent fireproof coating for a steel structure. The high-carbon-layer-strength intumescent fireproof coating for the steel structure is prepared from the following components in parts by mass: 0.3 to 0.6 part of cellulose, 18 to 23 parts of phosphorus flame retardant, 3 to 6 parts of modified nano titanium dioxide, 3 to 5 parts of modified expandable graphite, 0.6 to 1.8 parts of modified glass fiber, 1 to 3 parts of aluminum hydroxide, 1 to 3 parts of boric acid, 20 to 25 parts of emulsion, 22 to 32 parts of additive and 29 to 43 parts of water, wherein the modified nano titanium dioxide is a silane coupling agent grafted nano titanium dioxide; the modified glass fibers are alkali-treated glass fibers; the modified expandable graphite is acid-treated expandable graphite. The intumescent fire-retardant coating for the steel structure has excellent carbon skeleton strength and carbon-steel adhesion strength, the structural integrity of the intumescent fire-retardant coating can be kept under severe conditions such as high temperature, burning and airflow jetting, and the practical application performance is improved.

The invention relates to a method for synthesizing mordenite by using coal gangue as a raw material. The method comprises the following steps: firstly, carrying out acid treatment and activation on the coal gangue, extracting a silicon source and an aluminum source in the coal gangue as raw materials by accurately adjusting the use amount of sodium hydroxide, and finally preparing the pure-phase mordenite by accurately adjusting the content of acetic acid. The method for synthesizing the mordenite from the coal gangue is low in experiment cost, simple in process, good in repeatability and convenient for large-scale popularization to realize high value-added utilization of the coal gangue.

The invention relates to the technical field of acidic wastewater titrimetric analysis, and discloses an automatic sampling titrimetric analysis method based on a copper smelting acidic wastewater treatment link, which comprises the following steps: collecting waste acid to obtain a waste acid sample; carrying out titration treatment on the waste acid sample to obtain a waste acid sample image after the titration reaction is finished, and carrying out sediment outline extraction on the waste acid sample image to generate sediment coagulation complexity; according to the method, automatic sampling titration is combined with image analysis, precipitation coagulation complexity and arsenic specific hue separation degree are extracted, a precipitation effectiveness index and an arsenic residue risk coefficient are generated through dynamic fusion, arsenic precipitates and other precipitates in similar forms are accurately distinguished by utilizing precipitate contour features and arsenic specific hue in an HSV color space, and the arsenic content is accurately determined. The method has the advantages that spectral signal superposition interference is avoided, and the arsenic residual state can be accurately reflected, so that whether arsenic removal is qualified or not is reliably judged, the accuracy and safety of waste acid treatment are improved, and the quality of water reuse is guaranteed.

The invention discloses a perfluorinated compound adsorption material and a preparation method thereof. Comprising the following steps: 1) placing moso bamboo in a high-temperature carbonization furnace for carbonization treatment, after carbonization is completed, taking out bamboo charcoal, carrying out acid treatment to remove surface impurities and part of ash, then repeatedly washing the bamboo charcoal with deionized water until the bamboo charcoal is neutral, and finally drying the bamboo charcoal to obtain pretreated bamboo charcoal; and 2) putting the pretreated bamboo charcoal into a chitosan acetic acid solution to load chitosan on the surface of the bamboo charcoal, repeatedly washing the bamboo charcoal with deionized water to remove unloaded chitosan, and then drying to obtain the perfluorinated compound adsorption material. The prepared adsorption material has high adsorption capacity and selectivity on perfluorinated compounds, the adsorption performance of the adsorption material on the perfluorinated compounds is improved by modifying the bamboo charcoal, and the adsorption capacities of the adsorption material on perfluorooctanoic acid and perfluorooctane sulfonic acid can reach 400 mg / g and 450 mg / g respectively.

The invention discloses a recombinant human IV-type collagen as well as a preparation method and application thereof, and belongs to the field of bioengineering and protein engineering. According to the invention, three recombinant human IV type collagen new molecules are designed and screened on the basis of a part of sequences in a human IV type collagen alpha1 chain, soluble expression of a target protein is realized by using an escherichia coli system, and the recombinant collagen with the purity of more than 98% can be obtained through nickel column purification and acid regulation treatment. The recombinant collagen provided by the invention has good cell migration promotion activity and cell adhesion activity, and can be widely applied to the fields of tissue engineering, medical equipment, cosmetics, health care products and the like.

The invention discloses a La < 3 + >-doped lithium manganese oxide lithium ion sieve as well as a preparation method and application thereof, and belongs to the technical field of salt lake lithium extraction. The preparation method comprises the following steps: by taking Mn2O3 and LiOH as raw materials, carrying out hydrothermal reaction to generate LiMnO2, mixing the LiMnO2 with La2O3, grinding and calcining to form a La < 3 + >-doped spinel structure precursor La-LMO, and carrying out acid pickling to prepare La-HMO. La < 3 + > replaces part of Mn < 3 + >, the average valence state of manganese is improved, meanwhile, the structural stability of the manganese is enhanced through the high bond energy of La-O bonds, the number of exposed manganese atoms is reduced, manganese solution loss caused by Mn < 3 + > disproportionation reaction in the acid treatment process is effectively inhibited, the adsorbed oxygen content and active sites are increased, and the lithium ion adsorption capacity is remarkably improved. The material has high-selectivity adsorption capacity on lithium ions in salt lake brine in a strong alkaline environment, the manganese solution loss rate is obviously lower than that of traditional HMO, the cycle life is remarkably prolonged, and the industrial application potential is remarkably improved. The preparation process of the lithium ion sieve is simple, the raw material cost is low, and the technical bottlenecks that an existing manganese-based lithium ion sieve is poor in structural stability and high in manganese solution loss are solved.

The invention discloses an application of lactic acid (Lactate) in prevention and treatment of infection of CyHV-2 (Cyprinid Herpesvirus, CyHV-2), SVCV (Spring Viraemia of Carp Virus) and GCRV (Grass Carp Reovirus), a result of a cell line infection model shows that the lactic acid has a significant protection effect on cells infected by CyHV-2, SVCV and GCRV, and the lactic acid has a significant protection effect on cells infected by CyHV-2, SVCV and GCRV. Furthermore, a molecular biology experiment result shows that the transcription level of the virus related genes treated by lactic acid is obviously inhibited. Therefore, the lactic acid can be used as a medicine or an additive for preventing and treating CyHV-2, SVCV and GCRV infection, and has the advantages of low dosage and good protection effect.

The invention provides a preparation method and application of medical grade agarose with different molecular weights, and belongs to the technical field of biomedical materials. According to the invention, the crude agarose product is treated by DMSO, EDTA-Na2 and DEAE-cellulose, and then the acid concentration, the acid treatment temperature, the acid treatment time and the like in the acid treatment stage are finely regulated, so that the medical-grade agarose with medium-high molecular weight (3000-100000), medium molecular weight (3000-3000) and low molecular weight (1t, 3000) is successfully prepared. The medium-high molecular weight and medium molecular weight medical grade agarose provided by the invention has excellent gel performance, adjustable mechanical strength and injection performance, and is suitable for the fields of skin implants, gel dressings, tissue engineering and the like; the low-molecular-weight medical grade agarose shows good water solubility, fluidity and oxidation resistance, and has significant application potential in the fields of medical skin care products and functional dressings.

The invention discloses a preparation method of an in-situ nano manganese dioxide and zeolite composite material and application of the composite material in removal of metal ions and micropollutants in water, and belongs to the field of drinking water source water treatment. The preparation method of the in-situ nano manganese dioxide and zeolite composite material comprises the following steps: 1, pretreating natural zeolite; 2, preparing acid-treated zeolite; and 3, preparing the in-situ nano manganese dioxide and zeolite composite material. According to the invention, an impregnation-calcination method is adopted, MnO2 is loaded in situ on the pore channels and the surface of the acid-treated zeolite, and uniform growth of nanometer and sub-nanometer layered manganese dioxide is realized based on the nanometer pore channel structure of the zeolite. According to the structure, the reactivity of various oxidants represented by monopersulfate is stimulated, macromolecules and background substances with the same electric property are excluded through the confinement effect, interference of non-target objects on the oxidation process is reduced, and a new thought and technical support are provided for solving the problem of combined pollution of drinking water.

The invention relates to the technical field of mineralogy, in particular to a complex iron mineral distinguishing and quantifying method and an iron mineral content analysis method, which innovatively combines chemical dissolution, automatic mineralogy analysis and a micro-area magnetic verification technology to realize distinguishing and quantifying of complex iron minerals. According to the analysis method, a closed and mutual verification analysis system is formed, acid treatment of carbonate, automatic mineralogy analysis of residual minerals, micro-area magnetic verification correction of misjudgment of maghemite, element surface scanning verification of mineralogy total quantification accuracy and a final calculation result, and closed verification of the total iron content of chemical analysis are combined, and therefore the comprehensive performance of the magnetic separation system is improved. The reliability of a final result is ensured and standardized popularization and application are facilitated.

The invention relates to a nano silicon carbide whisker and a preparation method thereof, and the preparation method comprises the following steps: (1) carrying out acid process treatment on fly ash by using an acid solution, so that the content of key impurity elements in the fly ash accounts for 2-11% of the total mass of the treated fly ash, and obtaining acid-treated fly ash; (2) mixing the acid-treated fly ash with a first carbon source to obtain a mixture; and (3) covering the mixture with a second carbon source, roasting in a reducing atmosphere to obtain a roasted material which comprises a nano silicon carbide whisker layer and a total impurity layer positioned below the silicon carbide whisker layer, and removing the total impurity layer to obtain the nano silicon carbide whisker. According to the preparation method, the low-cost fly ash is taken as a raw material, the advantages of low preparation cost and relatively high product yield can be taken into account through the synergistic effect of moderate acid treatment, raw material position setting and roasting in the reducing atmosphere, and good morphology and relatively high purity of the nano silicon carbide crystal whiskers are ensured.

The invention discloses a preparation method of a high-negative-electricity nanofiltration membrane, which comprises the following steps: step 1, modifying a substrate by using an organic solvent to obtain a hydrophilic substrate; step 2, performing enhanced oxidation treatment on the biomass raw material to obtain biomass nanofibers carrying oxygen-containing functional groups, and depositing the biomass nanofibers on the surface of the hydrophilic substrate to form a biomass nanofiber middle layer; the enhanced oxidation treatment is one or more of oxidant coupling acid treatment, alkali treatment and cell disrupter ultrasonic treatment; the usage amount of the oxidizing agent is 5-50 wt%; and 3, carrying out interfacial polymerization reaction on a polyamine monomer and an acyl chloride monomer on the surface of the biomass nanofiber intermediate layer to prepare the polyamide active layer with the surface Zeta potential lower than-90mV. The high-negative-electricity nanofiltration membrane obtained by the invention has low Zeta potential, high permeability and high ion separation efficiency; the surface of the high-negative-electricity nanofiltration membrane can enhance the Donnan repulsive effect, and the hydrophilicity of the surface of the membrane is improved through a carboxyl-rich structure.

The invention relates to a carbon carrier material for microwave-assisted phosphoric acid treatment and oxygen reduction, a catalyst, a preparation method and application thereof, and the scheme is innovated by the following steps: dipping conductive carbon black (such as ketjen black ECP600JD) and 60-70wt% phosphoric acid solution according to a solid-to-liquid ratio of 1g / (15-18) mL, preheating at 100-250 DEG C in an argon atmosphere, then carrying out a reaction for 10-100 seconds under the assistance of a microwave power of 100-600 W, and carrying out vacuum drying to obtain the carbon carrier material for microwave-assisted phosphoric acid treatment and oxygen reduction. The phosphorus content of the prepared carbon carrier material is 4-6wt%, and the graphitization degree of the carbon carrier material is improved (ID / IG value is 1.15-1.20). And after the platinum-cobalt alloy is further loaded, the particle size of the nanoparticles is uniform, the potential loss is only 3 mV after 5000 accelerated attenuation tests in the proton exchange membrane fuel cell, and the power density attenuation is reduced by 58%. The method has the advantages of quick reaction, low energy consumption, high corrosion resistance and the like, and the stability of the catalyst is remarkably 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 method for preparing a zirconium boride ceramic material through pressureless sintering, and belongs to the technical field of zirconium boride ceramics. The method comprises the steps of preparing zirconium boride composite powder, modifying silicon carbide nanowires and mixing and sintering. The method for modifying the silicon carbide nanowire comprises the steps of acid treatment and modification, the modification step comprises the following steps: adding aluminum isopropoxide into absolute ethyl alcohol, adding a nitric acid solution, stirring for 1.5-2.0 hours at the temperature of 60-63 DEG C, adding the acid-treated silicon carbide nanowire, carrying out ultrasonic dispersion and water bath evaporation, then drying, putting into a muffle furnace, and carrying out heat preservation for 2.0-2.2 hours at the temperature of 490-500 DEG C to obtain a modified silicon carbide nanowire; the ceramic material prepared by adopting the method disclosed by the invention is high in density, good in mechanical property and excellent in high-temperature oxidation resistance and stability in a complex environment.

The invention belongs to the technical field of catalysts, and discloses an ammonia decomposition hydrogen production catalyst and a preparation method and application thereof. The preparation method of the catalyst for hydrogen production through ammonia decomposition comprises the following steps: in an inert atmosphere, successively carrying out calcination and acid treatment on a carbon carrier to prepare an acid-treated graphitized carbon carrier; adding a ruthenium precursor, a rare earth element precursor and an alkali metal precursor into ethanol, and mixing to prepare a mixed solution; then adding a graphitized carbon carrier into the mixed solution, and mixing; then adding urea and a surfactant, continuously mixing, and standing to obtain a solid precipitate; and finally, carrying out heat treatment on the solid precipitate in a reducing atmosphere. The catalyst takes a highly graphitized carbon material as a carrier, an alkali metal is doped to provide an alkaline environment, and a rare earth metal oxide and Ru form dual-assistant synergistic regulation of an interface, so that low-temperature high-activity ammonia decomposition hydrogen production and long-acting stable operation are realized.

A method for preparing a high-purity yeast β-glucan, comprising the following steps: treating a yeast cell wall mixed liquid by adding amylase at a certain temperature, then adjusting the pH, and treating the mixed liquid by adding lipase at a certain temperature; adding an alkali and a nonionic surfactant, carrying out heating and thermal insulation treatment, and cooling to obtain an alkali-treated liquid; washing and separating the alkali-treated liquid, adding water to a precipitate, then adding an acid to adjust the pH to 3-5, carrying out heating and thermal insulation treatment to obtain an acid-treated liquid, and performing separation, washing, and drying on the acid-treated liquid to obtain a yeast β-glucan product; and subjecting the yeast β-glucan to a combined action of a mixed enzyme preparation and ultrasound to obtain an enzymatic hydrolysate, and performing separation treatment on the enzymatic hydrolysate to obtain an insoluble yeast β-glucan and a water-soluble yeast β-glucan, respectively. In the present invention, a high-purity yeast β-glucan product having a content of 90% or more and a water-soluble yeast β-glucan product with biological activity can be prepared, the preparation method is simple, large-scale production can be achieved, and the quality and additional value of the product can be improved.

Apparatus and associated methods relate to evaluating impurity content in battery materials. In an illustrative example, a battery material impurity assessment system (BMIAS) may include a slurry mixing system and an impurity extraction system (IES). The slurry mixing system, for example, may include a motor configured to rotate a vertical axis of a slurry container. For example, the motor may pause a movement of the slurry container when the vertical axis is rotated at a predetermined angle. For example, the IES may include a translatable magnetic mass (TMM) enclosed within a sheath. For example, by operating a position of the TMM, the IES may release non-target impurity and retain target substances. In some implementations, the target substance may be ionized by an acid treatment solution rapidly without direct heating. In some implementations, the target substances may be dispersed on a conductive filter to be directly used in subsequent analysis. Various embodiments may advantageously rapid high precision and rapid impurity testing for battery manufacturing.

A treatment composition that includes a treatment adjunct and a population of core / shell delivery particles, where the shell is made from an acid-treated chitosan and a cross-linking agent, where the acid-treated chitosan results from treating chitosan with a weak acid, or even a mixture of a strong acid and a weak acid. Related methods of making and using such compositions.

The invention provides a positive electrode material, a preparation method thereof and a lithium ion battery, and belongs to the technical field of battery materials. Comprising the following steps: carrying out acid treatment on ferric oxide to obtain acid-modified ferric oxide; and mixing the acid-modified iron oxide, a second iron source, a lithium source and a phosphorus source to obtain a mixture, and then roasting the mixture to obtain the positive electrode material. By performing acid treatment on the ferric oxide, on one hand, impurities and a loose oxide layer on the surface of the ferric oxide can be removed, more active sites can be exposed, the reactivity of the ferric oxide is matched with that of the second iron source, the reaction process is carried out synergistically, and formation of a regular and uniform-size crystal structure is promoted; a foundation is laid for obtaining a positive electrode material with excellent electrochemical performance; on the other hand, the surfaces of the iron oxide particles can be regulated and controlled, so that agglomeration among the particles can be reduced when the iron oxide particles are mixed with the second iron source particles, the dispersity of the particles is improved, and the mixture forms more excellent gradation.

The invention relates to the technical field of distillate oil refining, and discloses a vacuum distillate oil deacidification method which comprises the following steps: S10, performing deacidification treatment on vacuum distillate oil and a deacidification agent in a deacidification unit; s20, carrying out extraction separation on the obtained deacidification agent to be generated and a back extraction agent in a back extraction mixing coalescer; s30, the separated supernatant liquid is conveyed to a back extractant regeneration device for regeneration treatment; s40, the separated lower-layer liquid enters a deacidification agent regeneration device to be subjected to regeneration treatment; the deacidification unit comprises one or more deacidification mixing coalescers, each of the deacidification mixing coalescers and the back extraction mixing coalescers comprises a shell, each shell is provided with a premixing area, a coalescence separation area and a settling separation area from top to bottom, structured packing is arranged in the premixing areas, and polar fiber bundles are arranged in the coalescence separation areas; the deacidification agent contains organic amine, a cosolvent and water. The method can be used for deacidification treatment of vacuum distillate oil with high viscosity and high acid value, and is wide in application range.

The invention relates to a method for preparing silicon dioxide aerogel based on waste clay bricks, which comprises the following steps: cleaning the surfaces of the waste clay bricks, and then crushing and screening to obtain waste clay brick particles with the particle size of 80-150 microns; carrying out alkali treatment according to the proportion that 5300-5400 g of NaOH solution is added into every 1 Kg of waste clay bricks, filtering, and retaining filtrate; carrying out acid treatment according to the proportion that 6700-10000 g of the dilute sulfuric acid solution is added into every 1 Kg of the waste clay bricks, mixing and uniformly stirring, standing, filtering, and repeatedly washing a filter cake to obtain gel; standing the obtained sol at room temperature for 2 to 10 days to form gel; then, sodium ion removal treatment, gel aging treatment, gel alcoholization treatment, hydrophobic modification treatment and normal-pressure drying treatment are carried out, and the silicon dioxide aerogel is obtained. The purpose of high-value utilization of the waste clay bricks is achieved, the building waste waste clay bricks which can pollute the environment are used as raw materials for preparing the silicon dioxide aerogel, and the silicon dioxide aerogel with excellent performance is successfully prepared.

The invention discloses a regeneration method of a metal modified mordenite catalyst used in a methanol amination reaction, and belongs to the technical field of catalyst regeneration. The catalyst regeneration method comprises the following steps: firstly, removing non-framework aluminum in a catalyst by using an organic acid solution, and then washing by using an organic solvent to remove residual organic acid and part of carbon deposit after acid treatment; oxidizing carbon deposit on the surface of the catalyst by adopting a hydrogen peroxide solution and inert mixed gas containing ozone; and finally, reducing active metal components in the catalyst by adopting hydrogen. According to the regeneration method, carbon deposit on the surface of the catalyst can be well and effectively removed under the low-temperature condition, generation of non-framework aluminum on the surface of mordenite in the regeneration process is reduced, the service life of the catalyst is effectively prolonged, and the regenerated catalyst can keep good reaction performance in the methanol amination reaction.