1457 results about "Sequestering Agent" patented technology

The invention relates to a method for continuously producing 1, 1, 1, 3-tetrachloropropane, which comprises the following steps: adopting a loop reactor in which a beam pipe is arranged in the reactor, mixing reaction raw materials ethylene and carbon tetrachloride at a Venturi nozzle at the lower part of the reactor through a gas circulation loop and a liquid circulation loop outside the reactor, and spraying into the reactor filled with a main catalyst. A cocatalyst and a chelating agent are added into a carbon tetrachloride raw material in advance, are pumped into a liquid loop by a feeding pump and then enter a reactor. Reaction raw materials are circularly stirred under the action of a beam pipe in the reactor, so that solid, liquid and gas phases are fully mixed. By adopting the method disclosed by the invention, the selectivity and the production efficiency of the 1, 1, 1, 3-tetrachloropropane can be greatly improved, and the method also has the advantages of simplicity in operation, environment friendliness, long service life of the catalyst and low cost.

A compound or molecular complex. The compound or molecular complex comprises: a metal chelator configured for chelation with a radioactive isotope or a non-radioactive isotope; and a trifluoroborate (BF3)-containing moiety configured for 19F / 18F exchange or a precursor thereof; and optionally a cell-targeting domain.

The invention relates to a composite reverse osmosis membrane acidic cleaning agent, a preparation method and a cleaning process thereof, and belongs to the technical field of environment-friendly water treatment. The cleaning agent comprises the following components in percentage by mass: 4-8% of inorganic acid, 20-40% of organic acid, 1-3% of a surfactant, 0.5-1% of a chelating agent, 0.5-1% of a compound corrosion inhibitor and the balance of deionized water. The composite corrosion inhibitor is formed by compounding 2-mercaptobenzothiazole and the like according to a specific mass ratio, the molecular weight of polyaspartic acid is 5000, and the molar ratio of Zn to Mo in the zinc-molybdate compound is 2: 1. The preparation method comprises the following four steps: firstly preparing a compound corrosion inhibitor premix, then preparing an acidic base solution, and then sequentially adding the components to finally obtain the cleaning solution. According to the cleaning process, a cleaning agent and deionized water are mixed, the membrane flux recovery rate is larger than or equal to 85% through cleaning of a specific process, the reverse osmosis membrane can be effectively cleaned, and the performance of the reverse osmosis membrane can be recovered.

A method for synthesizing a zirconium complex includes: mixing a solvent containing an organic substance having a dipole moment of 3.0 D or more, a chelating agent solution in which a chelating agent containing a structure represented by General Formula (1) or General Formula (2) is dissolved, and zirconium dissolved in an acidic solution, to obtain a mixed solution; and setting the mixed solution at a predetermined temperature or more to synthesize a zirconium complex.

The invention discloses a method for enriching light metal ions in a pore channel based on carbon nanofiber / carbon fiber nano confinement, and belongs to the technical field of sample pretreatment, and the method comprises the following steps: S1, preparing a carbon nanofiber / carbon fiber confinement material; and S2, putting the carbon nanofiber / carbon fiber confinement material obtained in S1 into a light metal ion solution, and stirring. According to the method for enriching the light metal ions in the pore channel based on the carbon nanofiber / carbon fiber nano confinement, the carbon nanofiber / carbon fiber is used as a confinement fluid carrier, ultrapure water, methanol or n-hexane is used as an extracting agent, a chelating agent does not need to be introduced, the method is green and environmentally friendly, the mass transfer rate is increased, and the method is suitable for large-scale industrial production. Therefore, high enrichment of light metal ions in water is realized.

The invention discloses a tooth repair composition containing mesoporous hydroxyapatite, a tooth repair product and a preparation method and application of the tooth repair composition and the tooth repair product. The tooth repair composition comprises nano-hydroxyapatite, fluoride and a chelating agent, the logarithm value logK of the stability constant K of the chelating agent to calcium ions is 1 < = logK < = 5, and K is measured in an aqueous solution with the temperature of 25 DEG C, the pH value of 7.0 and the ionic strength of 0.1 M; the nano-hydroxyapatite is prepared from nano-scale mesoporous hydroxyapatite, and the nano-hydroxyapatite contains nano-scale mesoporous hydroxyapatite. By adding the specific chelating agent, dynamic balance is formed in the tooth repairing composition, slow release protection can be formed on free calcium ions, the double inactivation effect possibly occurring when hydroxyapatite and fluoride exist at the same time is effectively avoided, the synergistic repairing effect of hydroxyapatite and fluoride is fully exerted, and the tooth repairing effect is improved. The use of fluorides can be greatly reduced, and safety and reliability are achieved.

The invention discloses positive electrode slurry for preventing formation of gel and a preparation method of the positive electrode slurry. The method comprises the following steps: S1, drying a positive electrode active material under the protection of inert gas; s2, carrying out surface modification by using a functionalized silane coupling agent; s3, drying the conductive agent under a high-temperature vacuum condition; s4, under the protection of inert gas, lithium alkyl sulfonate, a polyhydric alcohol chelating agent and polyvinylidene fluoride are subjected to a reaction to prepare a modified binder; s5, mixing and dispersing the modified active material, the conductive agent, the modified binder and the acidic buffer agent in a low-dew-point drying chamber; s6, performing ultrasonic treatment on the slurry under a vacuum condition; and S7, adding a cross-linked fluorosilane coupling agent, mixing at a low speed and precisely filtering to obtain the anti-gel positive electrode slurry. According to the invention, through a multi-synergistic anti-gel mechanism, the problem that the positive electrode material slurry is easy to form gel is solved, and the prepared slurry has excellent stability, rheological property and coating performance, so that the electrochemical performance of the battery is improved.

The invention relates to the technical field of bamboo pulp bleaching, and particularly discloses a method for preparing all-chlorine-free bleached bamboo pulp and application. The method adopts a three-section enhanced bleaching process and comprises the following steps: firstly, decomposing lignin under an alkaline condition of 100-115 DEG C through oxygen delignification (Op section); removing transition metal ions by using sulfuric acid and a metal chelating agent with a specific structure by adopting acid pickling chelation (AQ section); and finally, deeply oxidizing the residual lignin in a high-pressure oxygen environment through oxygen enhanced bleaching (Po section). In each stage, hydrogen peroxide is used as a main bleaching agent, sodium hydroxide, sodium silicate and other assistants are matched, and ineffective decomposition of hydrogen peroxide is effectively inhibited through staged pH regulation and a metal chelation technology. The whiteness of the obtained bamboo pulp is larger than or equal to 83% ISO, the kappa number is smaller than or equal to 3.0, and the requirements of high-grade paper products are completely met.

The present invention belongs to the technical field of petroleum fracturing production enhancement and modification, and specifically discloses a fracturing fluid pre-fluid for optimizing the size of in-situ autogenous proppant and its application, which is used to solve the problem of small particle size of proppant particles generated by hydrothermal reaction of formation minerals. The fracturing fluid pre-fluid is suitable for calcium-rich reservoirs and is composed of clean water, phosphate, pH regulator and Ca 2+ The chelating agent composition comprises 1 to 10 parts by weight of phosphate relative to 100 parts by weight of clean water, a volume molar concentration of the pH regulator is 1 to 5 mol / L, and Ca 2+ The molar concentration of the chelating agent is 0.001~1mol / L; the pH regulator is urea, ammonia, propionamide, etc. 2+ The chelating agent is EDTA, glutamic acid, etc. The present invention increases the average particle size of proppant particles generated by hydrothermal reaction of formation minerals, thereby improving the supporting effect thereof in micro-fractures of the formation.

The invention discloses application of a hydroxylamine compound cleaning solution. In particular to application of a hydroxylamine compound cleaning solution in cleaning plasma etched and ashed wafers. The hydroxylamine compound cleaning solution is prepared from the following components in percentage by mass: 1 to 30 percent of a hydroxylamine compound, 1 to 5 percent of a corrosion inhibitor, 0.1 to 5 percent of a chelating agent, 0.01 to 5 percent of a nonionic surfactant and 1 to 50 percent of a water-soluble organic solvent and water. The sum of the mass fractions of the components is 100%. The hydroxylamine compound cleaning fluid is safe and environment-friendly, solves the problem of high cost caused by fixed raw material sources, reduces the cost, and is safe and reliable.

The invention provides an efficient and environment-friendly reverse osmosis membrane scale inhibition cleaning agent based on a composite formula, and relates to the field of reverse osmosis membrane cleaning. Comprising effective components and water, and the effective components comprise the following raw materials in percentage by mass: 10-15% of a surfactant, 10-15% of a sterilizing agent, 30-40% of a composite chelating agent, 10-20% of slow-release organic acid, 5-10% of compound enzyme, 5-10% of an oxidizing agent and 1-5% of a defoaming agent; the composite chelating agent is a compound which takes attapulgite and montmorillonite as carriers and is loaded with hydroxyethyl ethylenediamine triacetic acid trisodium salt; the slow-release organic acid is citric acid modified by carboxymethyl chitosan. The cleaning agent provided by the invention contains the composite chelating agent, the slow-release organic acid, the compound enzyme, the surfactant, the sterilizing agent and the like in effective components, is prepared into the cleaning agent with water, has the effect of efficiently cleaning the reverse osmosis membrane, and is high in cleaning efficiency and small in damage to the reverse osmosis membrane.

The invention discloses an amino acid-amide-saccharide composite leaching agent and application thereof, and belongs to the technical field of industrial solid waste recycling and carbon dioxide capture and utilization, the composite leaching agent is formed by compounding a main leaching agent amino acid, an auxiliary leaching agent amide compound and an auxiliary chelating agent saccharide or a derivative thereof. According to the method, through the synergistic effect of the amino acid, the amide and the saccharide chelating agent, the calcium ions in the calcium-containing solid waste can be efficiently and highly selectively leached under the mild condition without additional acid. According to the composite system, through multiple coordination and spatial screening effects, the leaching selectivity of calcium ions can reach 99.5% or above, and dissolution of impurities is effectively inhibited; the zwitterionic characteristics of amino acid and the coordination of amide are utilized to realize proton self-sufficiency in the system and simplify the process; all the components have good biocompatibility and are green and environment-friendly; the composite system can also be used as a crystal modifier to induce high-purity calcium carbonate.

The invention belongs to the technical field of catalytic materials and hydrocarbon reforming, and particularly relates to a high-entropy catalyst as well as a preparation method and application thereof. The preparation method comprises the following steps: mixing a metal salt solution containing lanthanum, chromium, copper, zinc, manganese, nickel, iron and cobalt ions with a chelating agent and a dispersing agent for reaction, carrying out ultrasonic cavitation treatment to obtain sol, adjusting the pH value, gelatinizing under an oil bath heating condition to obtain a colloidal precursor, drying, and calcining in an air atmosphere to obtain a perovskite type high-entropy oxide precursor; and then treating in a reducing atmosphere to obtain the FeZnCuNiCo perovskite type high-entropy alloy catalyst which contains metal components of La, Cr, Ni, Mn, Fe, Zn, Cu and Co and takes a multi-metal alloy active center of Fe-Zn-Cu-Ni-Co as a main component. The high-entropy catalyst can meet the harsh requirements of high temperature, strong carbon deposition driving force and long-period operation in a propane dry reforming reaction, and is suitable for industrial application scenarios of continuous production of high-temperature synthesis gas.

The invention discloses a mine water fluorine removal agent and a preparation method and application thereof, and belongs to the technical field of wastewater treatment.The preparation method of the fluorine removal agent comprises the following steps that aluminum salt, calcium salt, magnesium salt and ferric salt are added into water to be stirred, then a chelating agent, a hydroxy carboxylic acid compound and a dispersing agent are added, the mixture is heated to 40-60 DEG C to be stirred and dispersed, and heat preservation is conducted. The preparation method gets rid of the constraint of traditional calcium salt, introduces the chelating agent, the hydroxy carboxylic acid compound and the dispersing agent on the basis of controlling the compatibility of the materials and the synthesis reaction process, and utilizes the excellent fluorine ion adsorption performance and flocculation settling performance of the aluminum-calcium-magnesium-iron-based quaternary metal material to improve the fluorine ion adsorption performance of the aluminum-calcium-magnesium-iron-based quaternary metal material. Quaternary metals are assembled into a long-chain porous structure through chelation, the specific surface area and the pore volume are further increased, the contact area with fluorine ions in mine water is increased, and the porous structure adsorbs complexing groups to achieve the purposes of rapid coordination, strong adsorption, precise chelation, flocculating settling and efficient removal of fluoride in mine water.

Functionalized materials that act as sorbent, as well as methods of making such materials and systems of using such materials, are provided. The disclosed processes, methods, and materials can be used for the separation of CO2 from fluid streams. In one aspect, the disclosed materials are synthesized by forming coated particles through the introduction of porous particles, such as silica, to a first reagent comprising a polymer. Then the functionalized material is formed as functionalized coated particles by the introduction of a second reagent comprising at least one adsorbing moiety to the surfaces of the coated particles. Formation of the functionalized material is in the presence of a chelating agent, antioxidant, and / or crosslinker. In some instances, formation of the functionalized material is further in the presence of a third reagent comprising an interaction moiety that is incorporated into the functionalized coated particles.

The embodiment of the invention discloses an intelligent linkage automatic control method for fly ash stabilization, and relates to the technical field of solid waste treatment. The method comprises the following steps: step S101, acquiring the content of heavy metals in fly ash detected in real time; step S102, based on the detection data, automatically calculating the ratio of the chelating agent stock solution to the process water / concentrated water through a preset algorithm; s103, controlling a fly ash weighing system, a solution weighing system and a mixing mill system according to the ratio of the chelating agent stock solution to the process water / concentrated water; wherein the step S102 comprises the following steps: determining a dynamic water-cement ratio; solution concentration is automatically switched according to a water source; and calculating the amount of the chelating agent stock solution and the water amount according to mass conservation. According to the embodiment of the invention, through multi-element dynamic proportioning, full-process intelligent linkage, equipment fault self-healing and unqualified product closed-loop treatment, the problems of low stabilization efficiency, agent waste and insufficient reliability in the prior art can be solved.

The invention relates to the technical field of glass cleaning agents, in particular to an environment-friendly cover plate glass cleaning agent and a preparation method thereof. The environment-friendly cover plate glass cleaning agent comprises the following raw materials in percentage by weight: 12-20% of inorganic base, 8-12% of a surfactant, 5-8% of a chelating agent, 3-5% of a humectant, 1-3% of an adsorbent, 1-3% of a dispersing agent, 0.3-1% of a buffering agent and the balance of deionized water, the surfactant is dodecyl glucoside and dodecyl ethyoxyl sulphobetaine, and the weight range ratio of the dodecyl glucoside to the dodecyl ethyoxyl sulphobetaine is (3-1): 1; the chelating agent is one or more of sodium gluconate, sodium polyaspartate and sodium polyepoxysuccinate. According to the present invention, the degradable surfactant and the degradable chelating agent are adopted, and the dispersant is added to modify the nanometer titanium dioxide, such that the low pollution property is achieved while the high decontamination efficiency and the anti-fingerprint ability are considered.

The invention belongs to the technical field of comprehensive utilization of rare earth resources, and particularly relates to a combined inhibitor and a calcium-containing rare earth ore flotation method thereof. The combined inhibitor is a combination of an organic chelating agent aqueous solution and a water glass aqueous solution; the organic chelating agent is one of polyaspartic acid, hydrolytic polymaleic acid and carboxymethyl chitosan; the mass ratio of the organic chelating agent to the water glass is 2: (10-25); the mass percent of the organic chelating agent aqueous solution is 2-10%, and the mass percent of the water glass aqueous solution is 5-8%. The combined inhibitor has the advantages of being high in selective inhibition effect on calcium-containing gangue minerals, environmentally friendly, environmentally friendly, easy to degrade, low in reagent dosage and the like, the grade and the recovery rate of rare earth in obtained rare earth ore concentrate are high, and the process structure is simple.

The application discloses a thickened oil viscosity reducer for a main viscosity contribution component of colloid and a preparation method thereof. The thickened oil viscosity reducer comprises the following components in percentage by weight: diethylene glycol methyl ether 25-35%, propylene glycol formate 15-25%, dispersant 5-8%, chelating agent 2-4%, anti-coking agent 0.5-1%, anti-swelling agent 1-2% and corrosion inhibitor 1-2%; and the balance is water. The application is a polar + non-aromatic hydrocarbon solvent system; completely avoids high-risk substances such as nonylphenol polyoxyethylene ether, petroleum sulfonate sodium and organic chlorine; is designed in pertinence and can effectively inhibit metal-induced asphaltene bridging; can withstand working conditions from normal temperature to 250 DEG C and up to 300 DEG C; thermal stability is significantly enhanced, and residual carbon after aging is lower than 8%; viscosity reduction efficiency is higher; the system is more stable, flexible in compounding and suitable for field construction.

The invention belongs to the technical field of petroleum fracturing yield increase transformation, and particularly discloses fracturing fluid prepad fluid for optimizing the size of an in-situ authigenic proppant and application of the fracturing fluid prepad fluid, which are used for solving the problem of small particle size of proppant particles generated by a formation mineral hydrothermal reaction in the prior art. The fracturing fluid prepad fluid is suitable for a calcium-rich reservoir and is composed of clear water, phosphate, a pH regulator and a Ca < 2 + > chelating agent, relative to 100 parts by weight of clear water, the content of the phosphate is 1-10 parts by weight, the volume molar concentration of the pH regulator is 1-5 mol / L, and the volume molar concentration of the Ca < 2 + > chelating agent is 0.001-1 mol / L; the pH regulator is urea, ammonia water, propanamide and the like, and the Ca < 2 + > chelating agent is EDTA (Ethylene Diamine Tetraacetic Acid), glutamic acid and the like. The average particle size of the proppant particles generated by the formation mineral hydrothermal reaction is increased, and the supporting effect of the proppant particles in formation microfractures is improved.

The invention relates to the technical field of cleaning agents, and discloses a biodegradable environment-friendly cleaning agent, which comprises: a composite surfactant system comprising at least one nonionic surfactant, an ampholytic surfactant and a chelating functional surfactant; the plant extract oil system comprises limonene and a eucalyptus oil mixture; the functional particle system comprises nanoscale enzyme microcapsules and slow-release type oxidized particles; the natural polysaccharide stable network system comprises at least two polysaccharide thickeners and a bio-based cross-linking agent, and the assistant system comprises a metal ion chelating agent, a buffer acid system and water. By introducing sodium polyaspartate as a green chelating surfactant, efficient chelating of calcium and magnesium ions under a hard water condition is realized, the cleaning power is remarkably improved, water stain residues are reduced, and the cleaning performance with wider adaptability is obtained.

The invention discloses a samarium manganese mullite catalyst rich in Sm vacancy and a preparation method and application thereof, and belongs to the technical field of VOCs waste gas catalytic oxidation. According to the invention, samarium nitrate and manganous nitrate are used as precursors, citric acid monohydrate is used as a chelating agent, urea is used as an additive, and the samarium manganese mullite catalyst rich in Sm vacancies is synthesized through a sol-gel method. The Sm vacancy samarium manganese mullite catalyst prepared by the invention shows excellent toluene catalytic oxidation low-temperature activity due to selective removal of inert Sm atoms on the surface of samarium manganese mullite, more active Mn atoms are exposed, and the surface lattice oxygen migration performance is enhanced. The catalyst has excellent performance in a stability test and a water vapor resistance test, and has a wide industrial application prospect.

The invention provides a low-cyanide gold leaching agent system and a dump leaching process thereof, and belongs to the technical field of hydrometallurgy. According to the method, a synergistic process of'interface activation, cyanide etching and iron precipitation inhibition 'is constructed by designing a low-cyanide gold leaching agent system. The amino acid auxiliary leaching agent adsorbs the gold surface to weaken lattice energy, so that the etching efficiency of trace cyanide ions is improved; mercapto-containing malic acid is used as a chelating agent, specific mercapto in molecules of the mercapto-containing malic acid and iron ions form an ultrahigh-stability water-soluble complex, generation of ferric hydroxide precipitates is thoroughly blocked, ferrous ions stabilized by the chelating agent are subjected to in-situ oxidation through dissolved oxygen and efficiently regenerated into potassium ferricyanide, and accumulation of free cyanogens in a solution system is eliminated; meanwhile, a chelating agent-iron complex forms a self-buffering pair, the pH of the dump leaching solution is accurately controlled, and secondary precipitation caused by local alkalization is prevented. According to the process, under the synergistic effect that the core chelating agent guarantees permeation stability and the leaching aid accelerates gold dissolution, the heap leaching period is compressed to 45 days.

The invention relates to the technical field of OLED (Organic Light Emitting Diode) manufacturing process etching processes, in particular to a silver etching solution for an OLED manufacturing process as well as a preparation method and application of the silver etching solution. The silver etching liquid comprises nitric acid, phosphoric acid, a buffer agent, a metal ion chelating agent and an ionic liquid inhibitor, the ionic liquid inhibitor comprises 1-butyl-3-methylimidazole phosphate, the metal ion chelating agent is selected from at least one of pyromellitic acid, diethylenetriamine pentaacetic acid and ethylenediamine tetramethylene phosphoric acid, and the buffer agent is selected from at least one of sodium chloride, sodium chloride and sodium chloride. The buffering agent comprises acetic acid, and all the components are prepared according to a specific mass ratio. The etching solution can balance the etching rate of silver and indium tin oxide, avoid silver residues and black spot defects, prolong the service life of the solution, reduce the use of a volatile buffer agent, adapt to the OLED fine manufacturing process, improve the product yield and reduce the production cost, and is suitable for etching of a metal substrate in the OLED manufacturing process.

The invention relates to the technical field of collagen extraction, and provides a collagen extraction process for increasing hydroxyproline content, which sequentially comprises the steps of raw material pretreatment, deliming and degreasing, directional enzymolysis, gradient pressure-temperature synergistic extraction, purification, concentration and drying, a composite pretreatment agent containing a proline hydroxylase activator, EDTA-2Na and neutral protease is adopted in the raw material pretreatment; deashing and degreasing are combined with a chelating agent solution and ultrasonic treatment; a compound enzyme solution composed of trypsin, papain and proline hydroxylase is used for directional enzymolysis; a two-stage gradient pressure-temperature cooperation mode is adopted for extraction; purification is realized through combination of gel filtration chromatography and ion exchange chromatography; and finally carrying out freeze concentration and vacuum freeze drying to obtain the product. According to the process, through a multi-step synergistic effect, the content of hydroxyproline in collagen is remarkably increased, the product purity is high, natural functional characteristics are reserved, and the process is suitable for the fields of food, cosmetics, biological medicine and the like.

The invention discloses a cleaning composition, a preparation method and a cleaning sheet, and belongs to the field of cleaning products. The cleaning composition is prepared from the following raw materials in parts by mass: 10-30 parts of an amino acid surfactant; 1 to 20 parts of an anionic surfactant; 15 to 45 parts of plant polysaccharide; 5 to 15 parts of a shape promoting agent; 1 to 10 parts of a nonionic surfactant; 0.5 to 5 parts of an ampholytic surfactant; 0.5 to 5 parts of a plant extract; 0.5 to 5 parts of a humectant; 0.1 to 5 parts of a chelating agent; 0-5 parts of essence; an enzyme preparation; 0 to 5 parts; and 20 to 105 parts of water. The washing and protecting sheet has the characteristics of low sensitivity and mildness, can be in direct contact with skin, is moderate in dissolving speed and cleaning power, and can be applied to the fields of hair washing, bathing, face cleaning, hand washing, underwear cleaning, maternal and infant fabric cleaning, toy cleaning and the like.

The invention discloses a preparation process of a rare earth precipitation resistant electrophoretic coating for an automobile body. The preparation process comprises the following steps: S1, preparing a stable solution; s2, preparing a rare earth chelating solution; adding lanthanum lactate into the stable solution for multiple times, and adding ammonium ceric sulfate for multiple times after the lanthanum lactate is completely dissolved; s3, preparing a resin base solution; s4, preparing mixed slurry; s5, adding a solvent and an auxiliary agent; a five-membered ring chelate with thermodynamic stability is formed by carboxyl, hydroxyl and rare earth elements in sodium citrate, rare earth ions can be tightly wrapped through strong coordination bonds, namely, empty orbits of the rare earth ions and lone pair electrons of a chelating agent form coordination bonds, so that the rare earth ions cannot be dissociated in a system, and the rare earth ions are prevented from being dissociated in the system. And a path of generating hydroxide precipitates by free rare earth ions is thoroughly blocked, so that rare earth elements are effectively ensured to be uniformly distributed in the electrophoretic paint, and the surface of a raw material treated by a subsequent electrophoresis process is more uniform.

The invention relates to a preparation method of a carboxylate dispersant and an application of the carboxylate dispersant in a suspending agent, and belongs to the technical field of dispersants.The carboxylate polymer containing carboxyl, polyethylene glycol and slow-release chelating agent nanoparticles are polymerized together to form a comb-shaped structure; the sulfonic acid group on the carboxylate dispersant is ionized into-SO3-, the surfaces of pesticide particles are negatively charged, the electrostatic repulsion in the system is enhanced, the collision among the softened pesticide particles can be weakened, the sedimentation trend of the pesticide nanoparticles is weakened to a certain extent, and the stability of the suspension system is improved. Meanwhile, sodium ethylene diamine tetracetate in the slow-release chelating agent nano-microspheres can be slowly released, the sodium ethylene diamine tetracetate is preferentially chelated with calcium ions and magnesium ions in water, the calcium ions and the magnesium ions are prevented from being combined with sulfonic acid and carboxylic acid groups on the carboxylate dispersing agent, and the comb-shaped structure of the carboxylate dispersing agent has strong steric hindrance, so that the carboxylate dispersing agent can be used for dispersing calcium ions and magnesium ions in water. The effect of physically blocking calcium and magnesium ions can be achieved.

The invention relates to a preparation method of a lithium difluoro bis (oxalate) phosphate concentrated solution, and belongs to the technical field of lithium battery electrolyte additives. Adding lithium oxalate into a solvent, stirring and dissolving to obtain a lithium oxalate solution; the method comprises the following steps: adding a modified fluorine ion chelating agent into a lithium oxalate solution, stirring, filtering, putting into a reactor, and slowly introducing phosphorus pentafluoride gas; after the introduction is finished, heating and stirring for reaction; after the reaction is finished, filtering reaction liquid to remove unreacted solid impurities, so as to obtain a lithium difluoro bis (oxalate) phosphate concentrated solution; the modified fluorine ion chelating agent is prepared from D301 ion exchange resin, dichloroethane, propylene-1-base boronic acid pinacol ester, mercaptoethyl guanidine dihydro bromide and sodium tert-butoxide. The lithium difluoro bis (oxalate) phosphate prepared by the method is high in purity and high in yield, and meets the use requirements of lithium ion battery electrolyte on lithium salt.

The invention provides a double-dosage-form copper acid etching solution as well as a preparation method and application thereof. The double-dosage-form copper acid etching solution comprises an agent A and an agent B, the agent A comprises the following components in parts by weight: 15-20 parts of an oxidizing agent, 4-7 parts of an organic acid chelating agent, 0.1-0.5 part of inorganic acid, 0.5-2 parts of alkali, 1-2 parts of a surfactant and 0.01-0.1 part of a metal corrosion inhibitor; the agent B is prepared from the following components in parts by weight: 25 to 30 parts of organic acid chelating agent, 0.2 to 0.5 part of inorganic acid, 15 to 20 parts of alkali, 1 to 2 parts of surfactant and 0.1 to 0.3 part of metal corrosion inhibitor. The double-agent copper acid etching solution provided by the invention can be compatible with etching of Cu / Mo and Cu / MTD film layers, can be compatible with etching of film layers with different thicknesses, and is long in service life, low in CD Bias, free of chamfer cracks, good in residue, small in taper variation and short in etching time.