143 results about "Acid treatment" patented technology

The application discloses a synthesis method of a large single-crystal sodium-ion battery layered oxide positive electrode material, and comprises the following steps: (1) weighing metal oxides containing transition metal elements, transferring to a device with mixing functions, uniformly mixing, and obtaining a metal oxide mixture; (2) adding acid to the metal oxide mixture, fully mixing, and completing an acid treatment process; (3) adding alkali to the mixture after acid treatment, fully mixing; (4) transferring the mixture obtained in the step (3) to a calcining furnace, high-temperature calcining, and obtaining a layered oxide. The acid treatment process is introduced, the surface of the metal oxide forms a defect structure under the action of the acid, and the defect structure is more beneficial to the formation of strong interaction between each component of the metal oxide and between the metal oxide and sodium-containing alkali, so that a larger single-crystal layered oxide structure is finally formed, and the specific capacity, rate performance and cycle performance are excellent.

The application provides a bacillus desiccabilis strain XT23 microbial agent, a preparation method and application thereof, and belongs to the technical field of biological agents. A biological agent comprises a bacillus desiccabilis strain XT23, a fermentation treatment liquid of the bacillus desiccabilis strain XT23, or supernatant separated from the fermentation treatment liquid of the bacillus desiccabilis strain XT23. The fermentation treatment liquid is obtained by acid treatment and heat treatment of the fermentation liquid of the bacillus desiccabilis strain XT23, which effectively promotes spore formation, inactivates miscellaneous bacteria, significantly improves the stability and storage period of effective live bacteria, maximally retains antibacterial active substances in the fermentation liquid, and makes the inhibition effect of the final biological agent on Vibrio parahaemolyticus equivalent to that of fresh fermentation liquid. Meanwhile, the addition of the auxiliary material has a protective and slow-release effect on the active ingredients, and further enhances the convenience and effect persistence of application.

This invention discloses a method for efficiently extracting rare earth elements from mine sediment based on flash Joule heating technology, thus establishing a rare earth element extraction technology field. The method comprises the following steps: (1) drying and grinding the mine sediment to be extracted to obtain rare earth precursor powder; (2) heat-treating the rare earth precursor powder using flash Joule heating under a protective atmosphere, followed by cooling and grinding to obtain flash Joule-heat-treated rare earth powder; (3) activating the flash Joule-heat-treated rare earth powder in an acid treatment solution, filtering after activation, and collecting the filtrate to obtain a rare earth element extract. Using this invention, efficient extraction of rare earth resources from mine sediment can be achieved.

The utility model discloses a nucleic acid processing device belongs to nucleic acid extraction technical field. Nucleic acid processing device includes processing container, pressurizing unit and collection container, and processing container has first containing cavity, one end of processing container is provided with first interface, the other end of processing container is provided with second interface, and the lateral wall of processing container is provided with sample adding pipe, and sample adding pipe, first interface and second interface all are connected with first containing cavity, and the first containing cavity is filled with impurity removing material, and the filter screen is arranged below impurity removing material, pressurizing unit communicates with first interface, and pressurizing unit is used for increasing the pressure in first containing cavity, and collection container has second containing cavity, and collection container communicates with second interface through first connecting pipe. The utility model is helpful to the nucleic acid extraction purification of efficient low cost.

The application discloses a preparation method of zinc oxide nanoflower fibers and application thereof. The preparation method comprises the following steps: cleaning and acid treating a nickel-chromium alloy wire base; preparing a zinc oxide seed layer on the surface of the nickel-chromium alloy wire base through an immersion-calcination method; and growing zinc oxide nanoflowers on the seed layer in situ through a hydrothermal method to obtain the zinc oxide nanoflower fibers. The fiber has the nickel-chromium alloy wire as the base, is good in flexibility and high in strength, has a firm combination of the zinc oxide nanoflower coating on the surface, is large in specific surface area, has rich active sites, and exhibits excellent selective adsorption capacity to polycyclic aromatic hydrocarbons. The application also provides application of the fiber in solid-phase microextraction, in particular, application of the fiber in enrichment and detection of trace polycyclic aromatic hydrocarbons in environmental water samples. The fiber is used for solid-phase microextraction of polycyclic aromatic hydrocarbons and detection of trace polycyclic aromatic hydrocarbons in environmental water samples, is low in detection limit, is good in reproducibility, is suitable for environmental water monitoring, and has important practical application value.

This application discloses a method for preparing n-butene from isobutene, comprising the following steps: contacting a raw material containing isobutene with a catalyst and reacting to obtain a product containing n-butene; the catalyst is composed of MgAl2O4 and a hierarchical porous molecular sieve; and obtaining the catalyst through the following steps: 1) subjecting the molecular sieve to alkali treatment and acid treatment in sequence to obtain the porous molecular sieve; 2) wet mixing of magnesium source and aluminum source and calcining to obtain the MgAl2O4; 3) mixing the porous molecular sieve with the MgAl2O4 and calcining to obtain the catalyst.

The application belongs to the technical field of oil exploitation, and particularly relates to an acid liquid for acid treatment of an oil layer and a preparation method thereof. The preparation method is as follows: the specific steps of the preparation method are as follows: in a reactor, piperazine-1,4-diethyl sulfonate monosodium salt, ethanol and bromoalkane are added, heated to reflux, and during the reaction, sodium hydroxide solution is used to maintain pH 7-8; 1-bromo-6-(trimethylammonium) hexyl bromide is added, heated to reflux, and during the reaction, sodium hydroxide solution is used to maintain pH 8-9; vacuum distillation is performed to obtain a viscous solid, cyclohexane recrystallization is performed to obtain a solid, and the solid is dried at 90 DEG C overnight to obtain corrosion-inhibiting acid; hydrochloric acid, hydrofluoric acid, hydroxyethylidene diphosphonic acid, corrosion-inhibiting acid and water are added to the reactor, stirred uniformly, and the acid liquid is obtained. The acid liquid has the advantages of low corrosion rate and long acidification time.

Provided is a wavelength conversion member manufacturing method and a wavelength conversion member including a sintered body having improved light-tightness of a surface other than a light incident surface and a light exit surface. A wavelength conversion member manufacturing method including a sintered body having a light incident surface, a light exit surface, and a light reflection surface different from the light incident surface and the light exit surface includes: a sintered body preparation step of preparing a sintered body including inorganic particle and phosphor particle; and a recess formation step of performing acid treatment on the sintered body to form a plurality of recesses in the light reflection surface of the sintered body.

Methods and fluids for consolidating unconsolidated particulates. An example method introduces a furfuryl alcohol-based resin treatment fluid into a wellbore; wherein the furfuryl alcohol-based resin treatment fluid is a furfuryl alcohol-based resin and a diluent. The method contacts the unconsolidated particulates within the wellbore with the furfuryl alcohol-based resin treatment fluid to produce resin-contacted unconsolidated particulates. The method further introduces a substituted amine acid treatment fluid into the wellbore after the introduction of the furfuryl alcohol-based resin treatment fluid into the wellbore; wherein the substituted amine acid treatment fluid is a substituted amine acid salt and a solvent. The method further contacts the resin-contacted unconsolidated particulates with the substituted amine acid treatment fluid.

This application relates to the technical field of bimetallic cyanide catalyst preparation, specifically disclosing an in-situ acid treatment modification method for bimetallic cyanide catalysts and the catalyst itself. The modification method comprises: S1, preparation of precursors to obtain zinc salt solution and cobalt cyanide salt solution; S2, co-precipitation reaction of zinc salt solution and cobalt cyanide salt solution under weakly alkaline conditions; S3, in-situ acid treatment, with the slurry pH controlled within the target range of 4-6.5 by real-time pH closed-loop regulation; S4, in-situ aging; S5, post-treatment to obtain the final product. Through in-situ acid treatment, combined with the synergistic effect of pH closed-loop regulation, the irreversible secondary aggregation of nanoparticles is inhibited at its source, and free metal ions are locked by organic acid coordination, significantly reducing the Co content in the polyether product. 2+ The dissolution rate and platinum-cobalt color number improve the catalyst's activity, stability, and batch consistency.

This invention discloses a method for screening the stability of biomass-derived hard carbon raw materials. The method involves treating biomass materials from different sources and batches that can be used to prepare hard carbon with an acid solution, then testing the sugar content, ash content, and coin capacity of the finished hard carbon. The method utilizes the relationship between these parameters to simply and quickly screen out biomass-derived hard carbon raw materials with good stability, thereby obtaining biomass-derived hard carbon materials with excellent battery cycle stability and good electrochemical performance. When the biomass ash content, sugar content, and coin capacity of the biomass-derived hard carbon after acid treatment satisfy the relationship 10≤α / β×σ≤50, an effective balance between biomass ash and sugar content can be achieved. This balance allows for the formation of a specific porous structure, increasing sodium storage sites and improving sodium ion conductivity, while also preventing excessive ash and impurities from affecting the electrochemical performance of the hard carbon material. This ensures the high energy storage capacity and excellent cycle stability of the hard carbon material.

This invention discloses a waste acid recovery method based on ion exchange separation technology, belonging to the field of waste acid recovery technology. The method includes the following steps: passing a waste nitric acid solution containing aluminum and chloride ions through a cation exchange resin to adsorb aluminum ions; adding silver nitrate solution to the adsorbed waste liquid to allow silver ions to react with chloride ions to form silver chloride precipitate; filtering out the silver chloride precipitate to obtain a nitric acid solution; removing the silver chloride precipitate, using aluminum foil as a reducing agent, and adding a small amount of hydrochloric acid to reduce the silver chloride to silver powder; washing the reduced silver powder and dissolving it in nitric acid to obtain a silver nitrate solution for recycling. This waste acid recovery method based on ion exchange separation technology solves the problem of excessive total nitrogen in wastewater discharge; it also significantly reduces waste acid treatment costs and improves economic efficiency.

This invention provides a phenolic acid-modified attapulgite composite sunscreen agent, its preparation method, and applications, as well as a Pickering sunscreen lotion, belonging to the field of cosmetic technology. The method of this invention includes acid treatment of attapulgite, surfactant modification, loading of phenolic acid biomolecules, and hydrophobic modification. Using modified attapulgite as a carrier, this invention loads phenolic acid biomolecules through electrostatic adsorption to construct a composite synergistic system, and further modifies the surface with hydrophobicity to obtain a composite sunscreen agent with high stability and excellent sun protection performance. The sunscreen agent prepared by this invention combines physical shielding and biological protection functions, exhibiting excellent UV absorption capacity, good dispersibility, skin compatibility, and a pleasant feel on the skin. It solves the problems of nanoparticle aggregation, whitening, and poor photostability in existing sunscreen products, making it suitable for the cosmetic sunscreen field. It can achieve broad-spectrum UVA / UVB protection, antioxidant properties, and soothing repair, showing broad application prospects.

The present invention provides a method for producing a concentrated beer-flavored beverage, said method comprising an acid treatment step for obtaining an acidified beer-flavored beverage by adding an acid to a raw material beer-flavored beverage so as to lower the pH and a concentration step for obtaining a concentrated beer-flavored beverage by concentrating the acidified beer-flavored beverage obtained in the acid treatment step. The present invention also provides a method for producing a beer-flavored beverage, said method comprising producing a concentrated beer-flavored beverage by the above method for producing a concentrated beer-flavored beverage, diluting the obtained concentrated beer-flavored beverage in accordance with the concentration rate in the concentration step, and adding an alkali so as to increase the pH.

The application provides an improved quartz purification method, which realizes ultrahigh-purity quartz by adopting a multi-step process assisted by a probe type ultrasonic wave.The purification process comprises the following stages: mechanical grinding, magnetic separation, acid immersion, ultrasonic oscillation assistance and drying, etc.The acid immersion process uses hydrochloric acid, nitric acid, phosphoric acid, hydrogen peroxide and sulfuric acid in any order to selectively remove impurities.Probe type ultrasonic oscillation is used in each acid immersion process to accelerate the reaction kinetics, improve the impurity dissolution efficiency and reduce residual pollutants.The multi-stage process can effectively remove metal and non-metal impurities while maintaining the structural integrity of the quartz.The synergistic effect of ultrasonic oscillation and precise acid treatment not only improves the purification efficiency, but also has high reproducibility and scale characteristics, meeting the high-end application requirements for ultrapure quartz.The quartz purification method provided by the application can improve the purity of quartz to four 9s without using hydrofluoric acid.

The invention discloses a method of extracting high-purity melanin from Black Soldier Fly(Hermetia illucens)larvae. The methodessentially comprises ofenzymatic breakdown of polymer exoskeleton components, subcritical water extraction, low-pH hydrolysis using formic acid, nanofiltration using graphene oxide membranes, ultrasonic treatment for metal ion removal and crystallization using supercritical CO2 to achieve melanin with purity levels greater than 95%. This method reduces the need for harmful organic solvents and treatment with acids,thereby making the process sustainable and environment friendly.

The application belongs to the technical field of catalysts, and provides a one-dimensional platinum-based catalyst, a preparation method and application thereof. The one-dimensional platinum-based catalyst has a nanorod structure and is a platinum-tellurium-bismuth catalyst or a bismuth-doped platinum-tellurium catalyst. The preparation method comprises the following steps: (1) in the presence of a dispersing agent, performing a hydrothermal reaction on a platinum precursor, a tellurium precursor, a bismuth precursor and ascorbic acid in an aqueous solvent to form a platinum-tellurium-bismuth ternary heterogeneous phase alloy; (2) loading the platinum-tellurium-bismuth ternary heterogeneous phase alloy on a carbon material to obtain a platinum-tellurium-bismuth catalyst; optionally, the method further comprises the following step: (3) performing acid treatment on the platinum-tellurium-bismuth catalyst obtained in step (2) to dealloy, thereby obtaining a bismuth-doped platinum-tellurium catalyst. The catalyst exhibits excellent electrocatalytic activity and stability in a formic acid oxidation reaction.

This invention discloses a liquid crystal polymer copper-clad laminate and its preparation method, relating to the field of liquid crystal polymer technology. The invention involves melt-blending and granulating a liquid crystal polymer, modified polyetheretherketone (PEEK), nanofillers, and a lubricant via twin-screw extrusion, followed by single-screw extrusion casting or blown film production to obtain a thin film, which is then hot-pressed with copper foil to produce the copper-clad laminate. This invention uses fluorinated benzylamine-modified PEEK, utilizing the π-π stacking and van der Waals forces between the fluorinated benzene rings and the liquid crystal polymer to enhance interfacial compatibility, improve melt strength and processing stability, and significantly enhance peel strength. Simultaneously, boron nitride hollow microspheres and diamond powder, after acid treatment, synergistically construct a thermally conductive pathway. The hollow microspheres introduce a trace amount of air to reduce dielectric loss, resulting in a copper-clad laminate that combines high peel strength, excellent thermal conductivity, and low dielectric properties.

The invention provides a method for chiral resolution of (trans)-2,2-dichloro-3-(3-chloro-4-fluorophenyl)cyclopropane-1-carboxylic acid. The method comprises the steps of: (a) treating (trans)-2,2-dichloro-3-(3-chloro-4-fluorophenyl)cyclopropane-1-carboxylic acid with a chiral base selected from the list consisting of: quinine, R )-1-cyclohexylethan-1-amine, S )-1-cyclohexylethan-1-amine and L )-leucinamide, in an organic solvent to form a suspension, (b) separating the desired enantiomer and diastereomeric salt of the chiral base from the suspension, and (c) optionally, treating the separated diastereomeric salt with an acid to obtain the desired enantiomer of 2,2-dichloro-3-(3-chloro-4-fluorophenyl)cyclopropane-1-carboxylic acid.

The application belongs to the technical field of molecular sieve catalysis, and relates to a preparation method and application of a catalyst for catalyzing methane steam into methanol by plasma. The catalyst uses mordenite prepared by a hydrothermal synthesis method as a carrier, is exchanged by copper ions, and is subjected to acid treatment by using a nitric acid solution, so that the acid site distribution and strength of the mordenite are accurately controlled, and deep oxidation of methanol is effectively inhibited. The preparation method comprises three core steps of hydrothermal synthesis of mordenite, copper ion exchange and acid treatment for controlling acidity, and has the advantages of simple process and low cost. The catalyst is applied to a reaction of catalyzing methane steam into methanol by plasma at low temperature, and under the mild conditions of low temperature and normal pressure, the selectivity of methanol can reach 57.58%, and the methanol accounts for more than 90% of liquid phase products. The application solves the problems of low methanol selectivity and insufficient research on acid control of existing catalysts for catalyzing methane into methanol, and provides a green and efficient technical scheme for efficient conversion of methane into high-value-added methanol.

This invention relates to the field of industrial waste acid treatment and resource recycling technology, and particularly to a method for the resource-based treatment and recycling of pickling waste liquid from hot-rolled titanium coils. The method includes: based on the mixed waste acid liquid discharged from the acid tank, continuous measurement and recording, filtration, impurity separation, and pretreatment liquid preparation are performed to obtain a first pretreatment liquid record; then, alkali solution is added, stirred, and a first pH window is adjusted, followed by precipitation and solid-liquid separation to obtain a first supernatant record; next, alkali solution is added, stirred, and a second pH window is adjusted to obtain a first mother liquor record; finally, diffusion dialysis or selective ion exchange membrane separation is performed to obtain a first regenerated acid liquid record, which is then mixed with fresh acid liquid after concentration detection to obtain a first recycling record. This invention, through graded precipitation and a complete recording chain, achieves stepwise separation of iron and titanium components and efficient recovery and reuse of acid liquid, significantly improving the resource utilization level.

The application discloses an active peptide for promoting bone growth, and a preparation method and application thereof. The active peptide contains amino acid sequences GPAGPLGPV, LGVPLPL, FLPEPPQEE and SFLPEPPQE, and is derived from an enzymatic product of animal bone collagen. The average molecular weight of the enzymatic product is 500-1000 Da, and the mass percentage of components with a molecular weight less than 1000 Da is greater than 60%. The preparation method comprises the following steps: sequentially performing acid treatment, alkali treatment, extraction, filtration and ion exchange on animal bone, and then performing enzymolysis on the animal bone under the action of a protease to obtain an enzymolysis solution, wherein the protease is selected from alkaline protease, trypsin and papain; and the enzymolysis solution is separated and purified, wherein the separation and purification comprises ultrafiltration membrane grading and chromatographic separation, the cut-off molecular weight of the ultrafiltration membrane is 3kDa, and the chromatographic separation comprises gel chromatography and reverse-phase high performance liquid chromatography separation. The low-molecular active peptide obtained by the application can promote the proliferation and / or differentiation of osteoblasts, improve the alkaline phosphatase activity, has a small molecular weight and is easy to be absorbed and utilized by the body, has a wide raw material source, has a simple and controllable preparation process, and has a good application prospect.

The application discloses an ion exchange membrane and a preparation method and application thereof. The preparation method of the ion exchange membrane comprises the following steps: (1) placing a perfluorosulfonic acid fluorine type resin membrane, a reinforcing membrane and the perfluorosulfonic acid fluorine type resin membrane in sequence and then performing hot pressing to obtain a composite base film; (2) performing bidirectional stretching after cooling the composite base film; and (3) performing heat treatment on the membrane after the bidirectional stretching in the step (2), and then performing alkali treatment and acid treatment in sequence to obtain the ion exchange membrane. The method of the application can increase the mechanical strength of the ion exchange membrane while ensuring the ion exchange capacity of the ion exchange membrane, the resin and the reinforcing material in the membrane are closely combined, the microporous structure is uniform, the crystallinity is high, the tensile strength is high, the proton conductivity is high, the proton exchange capacity is strong, and the ion exchange membrane can be applied to the fields of water electrolysis, fuel cells and the like.

This invention provides a chemical chain gasification method for Chlorella, belonging to the field of biomass energy conversion technology. The invention involves acid treatment of Chlorella to remove endogenous alkali (earth) metals and some ash, avoiding interference with the gasification reaction while retaining the organic active components of Chlorella. Calcination of ilmenite improves its mechanical strength, facilitating recycling, and converts it into an active state, enhancing its reactivity and increasing its selectivity for H2 and CO, particularly H2. This achieves efficient gasification of Chlorella, yielding high-purity syngas. Furthermore, the use of natural ilmenite reduces costs.

This invention discloses a method for preparing a protonated Hβ molecular sieve catalyst using acid treatment modification, the obtained catalyst, and its application. A β molecular sieve is mixed with an ammonium chloride solution, and after sufficient ion exchange, the resulting mixture is transferred to a centrifuge tube, centrifuged, and washed several times with water. The lower solid layer is dried and ground. After grinding, the solid is placed in a crucible, which is then placed in a muffle furnace for a first calcination at high temperature, yielding an H-type β molecular sieve. The obtained H-type β molecular sieve is mixed with an inorganic acid solution, and after sufficient acid leaching, the resulting mixture is allowed to cool to room temperature, filtered, and washed several times with water. The upper solid layer is dried and ground. After grinding, the solid is placed in a crucible, which is then placed in a muffle furnace for a second calcination at high temperature, yielding a protonated Hβ molecular sieve catalyst. This invention first hydrogenates the molecular sieve and then modifies it with an acid solution to construct highly efficient and stable active sites, thereby achieving efficient NO removal.

METHOD FOR COMPLETING OIL WELLS IN PRE-SALIFEROUS CARBONATE FORMATIONS WITH EARLY INJECTIVITY INDUCTION The present invention relates to a method for completing oil wells with early injectivity induction, promoting the elimination of drilling damage in a step prior to the installation of the production column and the subsea Christmas tree and without the need to use spiral tubing, by obtaining sufficient, but not excessive, initial injectivity, such that subsequent acid treatment can reach the formation without risk of fracturing, reducing the operating time and the risks associated with the use of this equipment.

The application discloses a method for preparing silicon fertilizer from acid treatment liquid containing silicon and a non-alkali silicon fertilizer, and the method comprises the following steps: (1) gelatinizing the acid treatment liquid containing silicon, and filtering and separating to obtain silica gel; and (2) adding calcium agent and / or magnesium agent into the gelatin, adding water to prepare slurry, and reacting, and filtering and separating to obtain the silicon fertilizer. The application develops a comprehensive treatment and resource utilization method aiming at the acid treatment waste liquid of minerals, especially the acid treatment waste liquid of the acid-alkali deslagging method of coal. According to the application, the silica in the acid liquid can be effectively utilized, the high-efficiency silicon fertilizer can be produced, the effective silicon content in the silicon fertilizer is high, the silicon fertilizer does not contain sodium, and the application has high industrial application value.