351 results about "Chelation" patented technology

The invention discloses an insect antibacterial peptide nutrient solution as well as a preparation method and application thereof, and belongs to the technical field of biology. Insect protein (fly maggot powder / hermetia illucens) and plant fiber (bran) are subjected to enzymolysis and then subjected to a pH gradient chelation process (5.0-7.0-8.5), metal ions (Fe < 2 + > / Mn < 2 + > / Zn < 2 + >) are added in stages for chelation, the chelation degree is larger than or equal to 91.4%, lentinan and alginate oligosaccharide are added for synergistic interaction, and finally the insect antibacterial peptide nutrient solution is obtained. Experiments prove that after the insect antibacterial peptide nutrient solution prepared by the invention is used for carrying out root irrigation treatment on plants, tomato yellow leaf curl virus or tomato spotted wilt virus can be remarkably prevented and treated, and the insect antibacterial peptide nutrient solution has high efficiency and persistence and conforms to the development direction of green plant protection.

The present application relates to a kind of composite phosphorus-free scale inhibitor and its preparation method, including 800-1200 parts by weight of desalted water, 1-3 parts by weight of modified lignin sulfonate, 2-4 parts by weight of calcium magnesium acetate, 0.5-1.5 parts by weight of azole, 400-600 parts by weight of soluble inorganic zinc salt and 50-150 parts by weight of copolymer A.The composite phosphorus-free scale inhibitor provided by the present application is clear and transparent concentrate, after the above concentrate is added to circulating water, the effective ingredient in it can form soluble chelate with Ca 2+ , Mg 2+ Forming, increase the saturation solubility of ion, hinder micro-fouling lattice formation, distort crystal growth, so that microcrystalline will not accumulate into scale, and can make old scale loose, gradually shed old scale;At the same time, the special corrosion inhibitor and other corrosion inhibitor produce synergistic effect, which can effectively control the pitting of stainless steel, achieve the purpose of preventing scale, and fundamentally reduce the efficiency of corrosion and scale inhibition.

The invention discloses a polydopamine-tea polyphenol coated copper manganese oxide composite nano-enzyme as well as a preparation method and application thereof, and belongs to the technical field of biomedical materials. According to the invention, a DA-Cu (II)-EGCG (epigallocatechin gallate) complex is formed by virtue of chelation of main components of dopamine and tea polyphenol, namely epigallocatechin gallate, and copper ions; potassium permanganate is introduced for oxidative polymerization to obtain the polydopamine-tea polyphenol / copper manganese oxide organic-inorganic hybrid nano composite material, the nano composite material is monodisperse nano particles, the average particle size is about 80 nm, the nano composite material shows excellent nano enzyme catalytic activity, active oxygen free radicals can be effectively removed, and the nano composite material can be used for preparing nano-enzyme. The material has good photo-thermal conversion performance under near-infrared light, and shows excellent photo-thermal and photodynamic synergistic antibacterial effects. The preparation method disclosed by the invention is simple, mild, environment-friendly, low in cost and convenient for batch production.

The invention provides an etching solution, application thereof and an etching method of an aluminum-based metal laminated film, and particularly relates to the technical field of etching solutions. The etching liquid is prepared from the following components in percentage by weight: 3 to 10 percent of metal oxidizing agent, 55 to 85 percent of phosphoric acid, 5 to 15 percent of organic acid, 0.2 to 1.8 percent of organic acid ammonium, 0.1 to 1.2 percent of nitric acid imidazole ionic liquid, 0.15 to 0.8 percent of amino acid based ionic liquid, 0.05 to 1.2 percent of modified beta-cyclodextrin, 0.08 to 1 percent of polyalcohol ether compound and the balance of water. The etching liquid has the advantages of low line width loss, excellent etching profile, high cleanliness, good compatibility and long service life, a buffer system, a chelation mechanism and a volatilization inhibition function are effectively cooperated, the service life of the liquid medicine is greatly prolonged, excellent chemical stability and aging resistance are fully reflected, high-compatibility etching is realized, and the corrosion resistance of the liquid medicine is improved. And the comprehensive performance advantages of high precision, low defect and long service life are also realized.

The invention discloses a preparation method and application of high-sensitivity and high-stability time-resolved fluorescent microspheres, and relates to the technical field of immunochromatography. The preparation method comprises the following steps: (1) preparing high-stability high-carboxyl-density polystyrene microspheres; (2) preparing a high-stability europium ion chelate; and (3) preparing the high-stability fluorescent microspheres. Through a strategy of combining functional monomer copolymerization and surface covalent labeling, the fluorescent microspheres which are connected through strong covalent bonds from inside to outside and are high in stability and carboxyl density are constructed; obvious differential advantages and innovativeness are shown in the aspects of chemical stability, anti-leakage capability of fluorescent markers and surface functional group density. A time-resolved fluorescent microsphere test strip developed based on the microspheres has the advantages of good stability, high detection sensitivity and the like, and can realize rapid detection and analysis of a substance to be detected.

The invention belongs to the technical field of petrochemical anticorrosion, and provides a multifunctional water-soluble corrosion inhibitor for an oil refining device and a preparation method of the multifunctional water-soluble corrosion inhibitor, and the corrosion inhibitor is a functionalized grafted copolymer obtained by a ring-opening reaction of a succinimide ring on a polysuccinimide intermediate and a plurality of amino-containing compounds; the amino-containing compound at least comprises gemini imidazoline quaternary ammonium salt with a corrosion inhibition function; a polyaspartic acid chain segment precursor with scale inhibition and dispersion functions; the organic amine compound has targeted chelating and pH buffering functions and contains sulfonic acid groups and carboxyl groups; according to the invention, double-anchored gemini imidazoline quaternary ammonium salt is taken as a corrosion inhibition core, and a polysuccinimide ring-opening grafting process is combined, so that chain segments with corrosion inhibition, scale inhibition, targeted buffering and temperature-sensitive self-repairing functions are covalently integrated into a same polymer main chain, and multi-functional efficient protection of a single agent in an oil refining device water phase system is realized.

The application discloses an automatic control method for oxidation flocculation parameters in mancozeb wastewater treatment, and belongs to the technical field of industrial wastewater treatment and automatic control. In view of the problem that the existing process relies on manual experience and the oxidation and flocculation stages are improperly connected, the multifunctional modified material containing dithiocarbamate salt groups, quinone groups and pre-complexed manganese and zinc ions is prepared first; the material and hydrogen peroxide are synchronously added in the acid oxidation stage, and the control system monitors the redox potential change rate in real time; when the redox potential reaches the preset threshold value and the characteristic change point with the first derivative of zero or the change from positive to negative appears and is maintained for the preset maintenance time, the system is automatically adjusted to be alkaline, the modified material triggers the net capture and chelation crosslinking reaction, and finally solid-liquid separation is carried out; the polymer skeleton is protected from indiscriminate attack of free radicals, the problem of drug antagonism is overcome, and the stable and up-to-standard effluent quality is realized.

The invention relates to a radionuclide labeled trimer probe 68Ga-TRAP-(FAPI) 3 targeting FAP and a preparation method thereof, Trap is used as a trivalent chelating platform, and three FAPI targeting units are covalently connected by clicking a chemical linking arm to form a trimer structure; the invention further relates to application of the 68Ga-TRAP-(FAPI) 3 probe in preparation of imaging agents or therapeutic drugs for diagnosing FAP positive diseases, experiments prove that the trimer probe is good in affinity and high in stability, and in cell experiments and animal experiments, the uptake rate of FAP positive cells is kept at a high level within 240 minutes; preclinical and preliminary clinical applications show that the tumor detection rate of the < 68 > Ga-TRAP-FAPI 3 in various cancer models is superior to that of < 18 > F-FDG, and compared with < 68 > Ga-FAPI-04, the < 68 > Ga-TRAP-FAPI 3 is clearer to display focuses (particularly tiny metastases), higher in uptake intensity and particularly outstanding in delayed imaging, and the < 68 > Ga-TRAP-FAPI 3 can be used for preparing a medicine for treating cancer. And a novel drug candidate with better performance is provided for precise diagnosis and staging of tumors and subsequent radionuclide targeted therapy.

The invention discloses a lipid compound for delivering a therapeutic agent as well as a preparation method and application of the lipid compound, and particularly discloses a compound shown in a formula I or pharmaceutically acceptable salt, stereoisomer, tautomer, solvate, chelate, non-covalent complex or precursor of the compound, the ionizable lipid compound can effectively deliver nucleic acid molecules, small molecule compounds and other drugs, and through comparison, the lipid nanoparticles are good in particle size distribution and high in encapsulation efficiency, the delivery effect can be obviously better than that of contrast lipid nanoparticles, and the requirement of in-vivo delivery can be met. (I)

The invention discloses cysteine mediated Hf / Cu bimetal synergistic self-assembled nano-particles as well as a preparation method and application of the cysteine mediated Hf / Cu bimetal synergistic self-assembled nano-particles. According to the method, cysteine is used as a multifunctional ligand, carboxyl and sulfydryl of cysteine are in bridge connection with metal through coordination, ligand chelation and assembly guiding effects are synchronously exerted, bimetallic ions are induced to be cooperatively self-assembled in an alkaline system (pH is 9-10), and metal cysteine self-assembled nanoparticles with uniform structures are formed through in-situ nucleation and multistage aggregation. According to the method, the ligand function and the bimetallic synergistic effect are accurately matched, the synthesis process is mild (room temperature), the operation is simple and convenient, and the product is excellent in dispersity and stability. Meanwhile, a close coordination structure constructed by cysteine provides a key channel for energy / electron transfer from sensitizing metal to Cu under X-ray irradiation, and lays a structural foundation for subsequent catalytic effect enhancement.

The invention belongs to the technical field of preparation of tetraisopropyl alcohol-based ethylenediamine, and particularly relates to a catalyst for preparing tetraisopropyl alcohol-based ethylenediamine as well as a preparation method and application of the catalyst. The catalyst is formed by chelating two amine nitrogen atoms with aluminum ions by taking an Al < 3 + > center as tetra-coordination and 1, 1-dimethoxytrimethylamine as a ligand, and has a structure as shown in a formula I in the specification. The two-component composite catalyst is formed on the basis of coordination and chelation of the organic metal compound and the organic amine, the organic metal compound can promote the antistatic performance of the tetraisopropyl alcohol ethylenediamine, and the organic amine can promote the compatibility of the tetraisopropyl alcohol ethylenediamine and a high polymer material, so that the antistatic property of the tetraisopropyl alcohol ethylenediamine is improved. Compared with a pure organic amine catalyst, the composite catalyst has the advantages of high reaction activity, side reaction inhibition, improvement of the conversion rate and selectivity of tetraisopropanolethylenediamine, no need of separation from the product, promotion of the product, reduction of the impurity separation problem in the subsequent process, reduction of the reaction pressure, low equipment requirement and reduction of the equipment investment.

The invention discloses a composite polyaluminum ferric chloride water purifying agent and a preparation method and application thereof, and belongs to the technical field of sewage treatment.The preparation method comprises the steps that citric acid modified nano magnesium phosphate is prepared through a hydrothermal reaction, then polyaluminum ferric chloride sulfate powder is prepared through alkalization polymerization, then acidified attapulgite serves as a carrier to load polyaluminum ferric chloride sulfate, and the composite polyaluminum ferric chloride water purifying agent is prepared. Finally, the composite material and citric acid modified nano magnesium phosphate are compounded, aged and dried, and the water purifying agent is prepared. A stable composite structure is constructed through multi-stage assembly, suspended solids, phosphorus, COD and heavy metal ions can be synchronously and efficiently removed through the synergistic effect of electric neutralization, a carrier framework and deep chelation, formed floc is compact and stable and high in impact resistance, the problems that a traditional water purifying agent is single in function, and the synergistic effect is prone to attenuation are fundamentally solved, and the water purifying agent is suitable for large-scale popularization and application. The water treatment scene with harsh requirements on the stability, the reliability and the long-term efficiency consistency of the medicament can be met.

The invention relates to a formaldehyde purification antibacterial composition containing salix mongolica activated carbon, preparation and application, and belongs to the technical field of environmental functional materials. The technical problem to be solved is that the existing formaldehyde adsorption material activated carbon has limited specific surface area and limited adsorption capacity. In the prior art, the adsorption material has a single function, does not have the ability to inhibit the growth of microorganisms (such as bacteria and molds), easily becomes a hotbed for microorganism breeding on the surface, possibly generates peculiar smell, even causes secondary pollution, and has high preparation cost. Active carbon based on salix psammophila is prepared through a gradient chelation pre-oxidation and phosphoric acid synchronous doping process, and then a plant essential oil microcapsule resistant dextrin compound is added to prepare the salix psammophila-containing formaldehyde purification antibacterial composition. The invention provides the composite material with efficient formaldehyde adsorption and long-acting antibacterial functions, and the composite material is relatively low in preparation cost and wide in application prospect.

This invention discloses a mild and stable temperature-responsive microemulsion composition, its preparation method, and its applications, belonging to the fields of cosmetics and pharmaceutical technology. This invention uses a nonionic decyl glucoside and anionic sodium lauroyl glutamate, introducing tocopherol polyethylene glycol succinate and disodium EDTA, forming a dual stabilizing mechanism of "antioxidant + metal ion chelation," effectively protecting unstable active ingredients such as glycyrrhizin. Experiments show that in an accelerated test at 60℃, the retention rate of glycyrrhizin increased by more than 20%. The microemulsion composition prepared by this invention exhibits high stability, low irritation, and skin-targeted sustained-release properties.

This invention relates to the field of photoelectrochemistry, and more particularly to a photoanode based on phosphonic acid chelation and photoelectrochemical activation, and its preparation method. The purpose of this invention is to provide a method for dynamic passivation of deep-level defects based on the synergistic activation of phosphonic acid chelation and photoelectrochemical activation. 1-hydroxyethylidene-1,1-diphosphonic acid (HEDP) molecules (ZISH) are introduced onto the surface of a zinc indium sulfide (ZIS) photoanode via a low-temperature water bath. Photoelectrochemical activation is then used to induce a chelation reaction between HEDP and Zn sites on the surface, forming a stable Zn–O–P coordination structure. Under photoelectric bias, this structure can reconstruct the Zn-S framework in situ, adjusting the coordination number of Zn and converting deep traps into shallow-level states (ZISA), thereby effectively suppressing interfacial recombination while maintaining a high hole injection rate.

The application belongs to the technical field of food quality monitoring, and particularly relates to a ferric magnetic solid-phase masking agent and a quantitative detection method for lead in vegetable products. The ferric magnetic solid-phase masking agent is prepared by the following method: S1, performing carboxylation on the terminal amino group of DFO to obtain DFO-COOH; S2, coating a SiO2 layer on the surface of Fe3O4 magnetic core to obtain Fe3O4@SiO2; S3, modifying the Fe3O4@SiO2 by amination to obtain Fe3O4@SiO2-NH2; and S4, coupling Ac-DFO with Fe3O4@SiO2-NH2 to obtain Fe3O4@SiO2-DFO. The three hydroxamic acid groups of DFO are combined with Fe 3+ to form a stable chelate, and Fe 3+ can be removed through magnetic separation, the removal rate is increased to more than 99%, and the quantitative detection of lead ions is further faster and more accurate in combination with mature immunochromatography technology.

The application relates to the technical field of MOF-based catalysts, in particular to a noble metal MOF-based catalyst, a preparation method and application. The catalyst is prepared by the method. The method comprises the following steps: preparing a noble metal-ligand chelation solution; adding manganese salt, a second organic ligand, a second organic solvent and water into the noble metal-ligand chelation solution in sequence, adjusting the pH value to 3-5 after stirring and dissolving, and obtaining a precursor suspension; cooling the precursor suspension to room temperature after a crystallization reaction; then, performing suction filtration, and performing first washing treatment on the obtained solid until the washing liquid is colorless and transparent; performing first vacuum drying treatment on the obtained solid, and obtaining a precursor powder; and performing reduction treatment, second washing treatment and second vacuum drying treatment on the precursor powder in sequence, and obtaining the catalyst. The application is the application of the catalyst in adsorptive catalytic oxidation of formaldehyde, and the conversion rate of formaldehyde can be greater than or equal to 95% at room temperature.

The invention discloses an immunomodulatory composition based on a cordycepin-selenium nano chelate and a preparation method thereof, and belongs to the technical field of biological medicines.The immunomodulatory composition is characterized in that 15-25 nm zero-valent selenium nano particles are chelated through hydroxyl of cordycepin and N7 site bidentate coordination, and a stable five-membered ring structure with the molar ratio is formed; the preparation method comprises the following steps: reducing sodium selenite in an inert atmosphere to generate selenium colloid, chelating the selenium colloid with a cordycepin ethanol solution, and carrying out ultrafiltration and freeze-drying to obtain the product. The invention aims to solve the problems of fuzzy structure, inconsistent batch, uncontrollable immunomodulatory function and the like caused by non-specific mixing in the prior art, and the composition can bidirectionally regulate and control IRF3 pathways, promote polarization of M2 type macrophages and proliferation of Treg cells, and has a clear immunomodulatory mechanism and excellent stability.

The invention relates to the technical field of daily chemicals, and particularly discloses a dishwashing liquid for a low-temperature dishwasher and a preparation method of the dishwashing liquid. The dishwashing liquid for the low-temperature dishwashing machine comprises a colored stain removal synergistic composition, in the dishwashing liquid for the low-temperature dishwashing machine, the mass percentage of the colored stain removal synergistic composition is 30-40%; the colored stain removal synergistic composition is prepared by mixing sodium glucoheptonate and trisodium methylglycine diacetate according to a mass ratio of (1-3): 1. The synergistic composition for removing the colored stains has excellent low-temperature stability and high-efficiency metal ion chelation capacity, the dishwashing liquid containing the above content can efficiently remove the colored stains such as tea stains, coffee stains and fruit stains in a low-temperature environment, the decontamination effect of the dishwashing liquid in the low-temperature environment is improved, and the dishwashing liquid has the advantages of being environmentally friendly and free of toxic and side effects. And the defect that a liquid detergent cannot clean the stains is overcome.

The application discloses a kind of composite guanidine group acetic acid feed nutrient additives and application, composite guanidine group acetic acid feed nutrient additives are according to dry base mass fraction, comprising the following components are made into composite granules by granulation processing: guanidine group acetic acid trace element complex: 30~70 parts;Methionine source: 20~60 parts;Carrier and binder: 5~25 parts;Wherein, the guanidine group acetic acid trace element complex is the chelation product of guanidine group acetic acid and trace element;The methionine source is selected from at least one of methionine, methionine salt, methionine hydroxyl analogue, methionine hydroxyl analogue calcium salt.This application integrates guanidine group acetic acid trace element complex, methionine and / or its hydroxyl analogue in a uniform solid particle, not only synergistic between components, and physical property uniform stable, convenient to use, can comprehensively improve the growth performance of animal, feed conversion rate and health condition.

The invention relates to a protein composite fiber after-finishing method and application thereof. The preparation method comprises the following steps: firstly, carrying out pretreatment such as cleaning and drying on protein composite fibers, and then mixing the protein composite fibers with a tannin-containing cross-linking solution to carry out primary cross-linking so as to construct a stable cross-linked network; soaking the protein composite fiber in a metal ion solution for secondary coordination crosslinking, and sequentially performing oiling, high-temperature setting and the like to finally obtain a protein composite fiber finished product with excellent heat resistance, mechanical property and high protein retention rate. The problems that fibrous protein components are prone to loss, traditional aldehyde or metal phosphorus cross-linking agents are toxic and harmful and the like are solved, the comprehensive performance of the protein composite fiber is remarkably improved through a specific cross-linking reaction between polyphenol structures in tannin of different sources and active groups of the fiber and a chelation coordination reaction of metal ions, and the protein composite fiber has the advantages of being high in practicability and wide in application prospect. The method can be applied to multiple fields such as high-end spinning and medical hygienic materials.

According to the preparation method and device of the low-molecular-weight dihydroxy-terminated polyphenyl ether, provided by the invention, the reaction is more complete through gradient polymerization reaction, the generation of reaction byproducts is greatly reduced, and the yield is higher; a segmented chelation mode is adopted, so that the residual content of the catalyst is greatly reduced, and the high applicability of the product in rear-end application is remarkably improved; by applying the special device disclosed by the invention, the reaction is more sufficient and uniform, the molecular weight distribution of the product is narrow, the quality uniformity is good, and the compatibility with downstream application is better.

The present disclosure relates to new manganese (Mn2+) chelate compounds, to methods of preparing said compounds, to the use of said compounds as contrast agents in diagnostic imaging such as magnetic resonance imaging (MRI) and to their use in a mammalian body.

The present application provides a PSMA-targeting ligand compound and chelate thereof and use thereof. The structure of the PSMA-targeting ligand compound is shown in formula I, wherein R1, R2 and R4 are each independently selected from H and optionally substituted C1-C5 linear or branched alkyl; R3 is selected from optionally substituted aryl ring group and optionally substituted aromatic heterocyclic group; X is a sulfur or oxygen atom; Y is selected from a chemical bond and -NH-(CH2)m-, wherein m is an integer selected from 0-18; and Z is a radioactive metal ion chelating group. The pharmacokinetic characteristics of the PSMA-targeting ligand compound are obviously improved, which can be more effectively absorbed by the human body, stably exist in the body, and be taken up and internalized by cancer cells, so that the coupling of the radioactive nuclide can obtain cancer treatment drugs and diagnostic reagents with obviously improved therapeutic effect.

The invention provides rare earth recovery sewage treatment equipment, which relates to the technical field of rare earth sewage treatment, and comprises a rare earth sewage pool, a filtration and enrichment device, a temporary storage device, a post-treatment device and a reflux detection device, the rare earth sewage pool is communicated with the filtering and enriching device, and the filtering and enriching device comprises a filtering mechanism and an enriching mechanism; the filtering mechanism is respectively connected with the temporary storage device and the reflux detection device, and the enrichment mechanism is connected with the post-treatment device. Impurities and small-particle impurities in the rare earth sewage are removed through the transverse grating and the filter block, and then rare earth ions are efficiently enriched through the chelating adsorption column; meanwhile, the reflux detection device is matched with the cleaner, so that residual heavy metal ions and harmful anions can be removed in a targeted manner, the treated rare earth sewage can reach the internal recycling or direct discharge standard without secondary centralized treatment, the treatment flow is simplified, and the comprehensive treatment cost is reduced.

The invention provides a method and equipment for preparing lithium carbonate by extracting lithium from salt lake brine, and relates to the field of battery material lithium carbonate. The method for preparing the lithium carbonate by extracting the lithium from the salt lake comprises the following steps: S1, taking a preset volume of tetrabutylammonium bis (2-ethylhexyl)-phosphate, dissolving the tetrabutylammonium bis (2-ethylhexyl)-phosphate into sulfonated kerosene to prepare a 0.2 mol / L organic phase solution, and washing the organic phase solution twice by using equal-volume deionized water to remove water-soluble impurities; according to the method for preparing the lithium carbonate by extracting the lithium from the salt lake brine, provided by the invention, the efficient selective extraction of the lithium is realized through the synergistic effect of ion exchange, chelation coordination and hydrophobic interaction; the solubility of the complex in an organic phase is enhanced, and a stable six-membered ring chelate is formed by a bidentate ligand structure of [DEHP] <-> and Li < + >; the unique anion and cation structure endows the lithium ion battery with the advantages of low volatility, high cyclicity, environmental friendliness and the like, and the lithium ion battery has remarkable industrial potential in preparation of battery-grade lithium carbonate by extracting lithium from a salt lake.

This invention relates to the field of semiconductor manufacturing technology, specifically disclosing a pre-cleaning method for silicon carbide polished wafers. The method first utilizes an organic cleaning solution coupled with polishing and ultrasonication to efficiently remove wax and organic contaminants, and loosen the nano-carbon cluster structure. Then, a hydrogen peroxide-hydrofluoric acid composite system is used to renew the oxide layer and fix metal contaminants in situ. Subsequently, a sulfuric acid-hydrogen peroxide high-temperature strong oxidation system is used to deeply decompose the nano-carbon clusters and complex organic matter. Finally, under the synergistic effect of ultraviolet photocatalysis and pulsed megasonic waves, a composite cleaning solution of oxalic acid and hydrogen peroxide is used to achieve efficient chelation and desorption of metal ions, forming a stable passivation film on the surface. This method can stably control the surface roughness (Ra) of the silicon carbide substrate below 0.2 nm, while completely breaking the vicious cycle of "cleaning-residue-recontamination," significantly improving cleaning efficiency and substrate surface quality.

This invention discloses a Ca²⁺ cross-linked bilayer phosphorus-nitrogen hybrid flame-retardant coated PET fabric and its preparation method. The fabric uses PET fabric as a substrate, with a bottom flame-retardant layer and a top cross-linked layer sequentially loaded from bottom to top. The bottom flame-retardant layer is loaded with lithium bentonite and phytic acid, and the top cross-linked layer is loaded with lithium bentonite and sodium alginate. The top cross-linked layer undergoes Ca²⁺ cross-linking treatment to form a network chelated with calcium ions. The preparation process involves PET pretreatment, bottom coating, top coating, and calcium ion chelation cross-linking, all using an aqueous phase and without organic solvents, resulting in environmentally friendly raw materials and low energy consumption. The prepared fabric achieves a limiting oxygen index of over 33%, exhibits self-extinguishing properties during vertical burning, and produces no dripping, solving the problems of easy peeling and rapid performance degradation of traditional flame-retardant coatings after washing.

The invention relates to the field of mineral processing, in particular to an ammoniated lignin biomass collecting agent and a preparation method and application thereof. The preparation method comprises the following steps: pretreatment, modification and extraction. The modification method comprises the following steps: stirring a lignin mixed solution, primarily heating to 50-60 DEG C, adding amino alkane (an amino alkane compound with a carbon chain length of 3-6), heating to 70-90 DEG C, dropwise adding an aldehyde additive for reaction, and cooling to obtain an ammoniated lignin modified solution. According to the preparation method, lignin is pretreated and activated through strong base, then treatment of'low-temperature amine adding-high-temperature aldehyde adding 'is carried out, it is guaranteed that the Mannich reaction is smoothly carried out, and therefore the ammoniated lignin biomass collecting agent is prepared. The modified lignin can significantly improve the collecting rate and selectivity of spodumene through electrostatic attraction and a synergistic effect of forming a chelate with aluminum ions on the surface of spodumene, has the advantages of environmental protection and low cost, and is suitable for a flotation separation process of spodumene ore.

This application discloses a method for preparing a polyepoxysuccinic acid-modified sulfur quantum dot scale inhibitor and antibacterial agent, belonging to the field of water treatment nanomaterials. The method includes: preparing nitrogen-doped sulfur quantum dots; reacting polyepoxysuccinic acid or its derivatives with nitrogen-doped sulfur quantum dots to obtain a composite product; purifying the composite product; and concentrating, drying, and grinding the purified composite product to obtain the scale inhibitor and antibacterial agent. This application modifies the surface functional groups of sulfur quantum dots with polyepoxysuccinic acid or its derivatives, endowing the product with abundant active functional groups. This allows the product to inhibit the formation of calcium carbonate scale through chelation solubilization, crystal form regulation, and adsorption dispersion mechanisms, while retaining the intrinsic antibacterial properties of sulfur quantum dots, effectively inhibiting bacterial growth in water while inhibiting scale formation. This preparation method is environmentally friendly, with mild reaction conditions, and the resulting scale inhibitor and antibacterial agent has good reservoir compatibility, making it suitable for high-salinity and high-temperature environments in oil fields.