21results about How to "Improve complexation ability" patented technology

The invention provides an alkali-free fluorine-free liquid accelerator and a preparation method thereof, the alkali-free fluorine-free liquid accelerator comprises the following components: soluble aluminum salt, a dispersant, a pH regulator, an early strength agent, polymeric alcohol amine and water, and the polymeric alcohol amine is obtained by polymerization reaction of an acrylate monomer, a polyamine monomer and an alkyl ethylene oxide monomer. According to the accelerator, the complexing ability to aluminum ions is improved by introducing polymeric alcohol amine, so that the solubility and the stability of the aluminum ions are improved, meanwhile, the solubility of amide groups can be improved by hydrophilic groups in chain segments of the polymeric alcohol amine, the setting time of concrete is shortened, and the early strength of the concrete is improved.

The application relates to the technical field of phosphating aids, and discloses an aid for reducing phosphating sediment and a preparation method, which is composed of the following raw materials in percentage by weight: organic phosphonic acid sediment inhibitor 20-40%, high-molecular dispersant 10-25%, complexing stabilizer 5-15%, pH buffer 2-8%, oxidant 1-5%, surfactant 0.5-3%, and the balance is deionized water. Through the synergistic effect of the core components, the organic phosphonic acid sediment inhibitor and the high-molecular dispersant, a multiple protective barrier of "inhibiting nucleation, resisting scale growth and dispersing and stabilizing" is constructed, so that the generation and adhesion of the sediment are fundamentally reduced.

The invention relates to the technical field of environment-friendly materials, and provides an environment-friendly deplating agent for neodymium-iron-boron materials and a preparation method and a using method thereof.The deplating agent comprises, by weight, 1%-5% of ammonium carbonate, 5%-10% of sodium dihydrogen phosphate or trisodium phosphate, 1%-5% of sodium hydroxide, 10%-15% of potassium citrate and the balance deionized water. The cleaning agent comprises the following components in percentage by weight: 40-50% of a cleaning agent, 5-10% of amino triethanol, 15-20% of hexamethylenetetramine or ethylenediamine, 40-50% of deionized water, and 0.1-1% of a chelating agent and a surface repairing agent; wherein the surface repairing agent is a composition comprising 0.1-1% by weight of nanoparticles and 0.1-0.5% by weight of a rare earth element compound; the nanoparticles and the rare earth element compound are used for forming a complex for repairing small surface defects; the rare earth element compound comprises one or more of a dysprosium compound, a praseodymium compound and / or a samarium compound; the nano particles comprise nano neodymium oxide and nano iron oxide, and the mass ratio of the nano neodymium oxide to the nano iron oxide is (1: 1)-(2: 3).

The present invention relates to the technical field of catalyst preparation, and specifically to a preparation method and application of an ultra-low temperature denitration catalyst. The preparation method of the ultra-low temperature denitration catalyst comprises the following steps: (1) adding a molybdenum salt and a complexing agent to pure water, heating and stirring, dissolving the molybdenum salt completely, obtaining a molybdenum complex solution, and then roasting to obtain modified molybdenum oxide; (2) adding a vanadium salt and a complexing agent to pure water, heating and stirring, dissolving the vanadium salt completely, cooling, and obtaining a vanadium complex solution; (3) adding titanium dioxide and modified molybdenum oxide to the vanadium complex solution, stirring evenly, drying, and roasting to obtain an ultra-low temperature denitration catalyst. The present invention improves the denitration performance of the denitration catalyst at ultra-low temperatures, while reducing SO 2 / SO 3 Conversion rate.

The invention provides a nano-composite microsphere supported copper catalytic material and a preparation method and application thereof, and belongs to the technical field of nano-composites.The carrier of the catalytic material is PS-CS-SiO2 nano-composite microspheres, the PS-CS-SiO2 nano-composite microspheres are composed of PS monodisperse microsphere powder, SiO2 and chitosan, and the load active component of the catalytic material is Cu < 2 + >. The PS-CS-SiO2 nano-composite microsphere has unique compatibility and space structure, and has larger surface area and more exposed complexing sites compared with a chitosan material, so that the complexing ability to copper is obviously enhanced, the contact with a reaction substrate is more sufficient, and the catalytic activity is higher when the chiral organic boride is prepared; in addition, the catalytic material can be recycled for multiple times, keeps excellent performance, and is very suitable for large-scale industrial application.

The invention belongs to the technical field of fluorescent probes, and discloses a coumarin molecular probe containing a porphin group and a preparation method and application of the coumarin molecular probe. The preparation method comprises the following steps: performing chloroacylation modification on two carboxyl groups in dicarboxyphenyl porphin molecules to obtain a chloroacylated porphin compound; and carrying out nucleophilic addition reaction on the chlorine compound subjected to chlorine acylation and coumarin containing hydroxyl to prepare the coumarin molecular probe containing the chlorine group, the preparation process is simple, the requirement for reaction conditions is low, the yield is high, the molecular probe has high selectivity, sensitivity and anti-interference performance on Fe < 3 + >, Fe < 2 + > and Fe < 3 + > can be accurately distinguished, and the molecular probe has good application prospects in the fields of light absorption antennas, organic light emitting diodes, fluorescent probes, anti-tumor drugs and the like.

The invention relates to a preparation method of a barium strontium sulfate scale remover, which comprises the following steps: adding a prepared additive solution into a prepared chelating agent alkaline solution, fully mixing and dissolving, and adjusting the pH value to be alkaline to obtain the barium strontium sulfate scale remover. Compared with the prior art, the preparation method has the following beneficial effects that the damage effect of the descaling agent on barium strontium sulfate scale can be remarkably improved, the contact area with metal ions is increased, so that the overall descaling effect is improved, formation of the barium strontium sulfate scale is effectively damaged, the descaling agent still keeps a stable descaling effect in a high-temperature environment, and the service life of the descaling agent is prolonged. The method has a wide industrial application prospect. The used chelating agent not only has a good metal ion chelation effect, can effectively complex ions such as barium and strontium and destroy generation of barium sulfate and strontium sulfate crystals, but also has the characteristics of being still stable at high temperature and high pH value, suitable for complex industrial conditions, excellent in performance in neutral and alkaline water and the like, and is more environmentally friendly.

The invention belongs to the technical field of water purification materials, and particularly relates to a cellulose-kaolin-rice hull powder composite modified material as well as a preparation method and application thereof. The cellulose-kaolin-rice hull powder composite modified material comprises the following raw materials: modified cellulose, modified rice hull powder and kaolin, and the mass ratio of the modified cellulose to the modified rice hull powder to the kaolin is 1: 0.3: (0.25-0.75). After cellulose is chemically modified, carboxyl groups are introduced, so that the complexing ability with lead ions is enhanced; abundant pores and large specific surface area of kaolin provide more space for adsorption of lead ions; the rice hull powder treated by acetic acid can more effectively adsorb lead ions. After carboxylated modified cellulose is combined with rice hull powder and kaolin which are treated by acetic acid, the overall adsorption capacity of the material is increased, a synergistic effect is achieved through combination of the carboxylated modified cellulose, the rice hull powder and the kaolin, and the removal rate and removal efficiency of lead ions are remarkably improved.

The invention provides a supercritical CO2 membrane extraction method for strategic metal in fly ash, and relates to the technical field of solid waste resource utilization and environmental protection. The TBP and DEHCNPB composite chelating agent is adopted and matched with the ethanol-methanol composite modifier, so that the compatibility of strategic metal ions and supercritical CO2 is remarkably improved, and the complexing ability is enhanced; according to the method, supercritical CO2 is used as an extraction agent, CO2 can be recycled, no solvent is left, mechanical activation pretreatment is conducted, the stable structure of strategic metal in the fly ash is damaged, the extraction efficiency is greatly improved, the extraction rate of strategic metal such as rare earth elements, lithium and gallium reaches 90% or above, and the extraction rate of rare earth elements such as Nd and Eu can exceed 97%. Through the selective screening effect of the polyimide graphene composite membrane, precise grading separation of different strategic metals is achieved, the separation purity reaches 98% or above, and the problems that a traditional process is poor in selectivity and tedious in subsequent separation are solved.

The application discloses a sodium ion battery positive electrode material and a preparation method thereof. By adding cheap, non-toxic, environment-friendly and easily-degradable water-soluble cellulose as an additive, the growth of a specific crystal direction can be inhibited. The hydrophilic group of the water-soluble cellulose can change the coordination environment of metal ions and reduce the entry of water molecules into the crystal lattice. In addition, by introducing the water-soluble cellulose, high-concentration reactant feeding can be realized, which is beneficial to reducing the consumption of industrial water. Meanwhile, compared with other existing additives, the water-soluble cellulose is environment-friendly, easily-degradable, low in production and separation cost, and free of toxic by-product generation. The prepared open three-face cubic Fe-based Prussian blue analogue material is good in dispersity, high in purity and uniform in morphology, and as a sodium ion battery positive electrode material, has a reversible capacity of 155.40 mAhg ‑1 at 0.1C (1C=170 mAhg ‑1 ) and a first discharge coulombic efficiency of 97.83%.

The invention provides reusable glass frosting as well as a preparation method and application thereof, and relates to the technical field of glass frosting, the reusable glass frosting comprises the following components in parts by mass: 20-40 parts of fluoride salt, 5-10 parts of inorganic salt, 5-10 parts of solid particles, 40-50 parts of inorganic acid and 10-30 parts of water; the reusable glass frosting liquid is subjected to precipitation treatment after a glass frosting process to obtain a frosting liquid precipitate, the frosting liquid precipitate is used as one of components for preparing the regenerated glass frosting liquid, and the regenerated glass frosting liquid comprises the following components in parts by mass: 2-10 parts of the frosting liquid precipitate, 20-30 parts of fluoride salt, 5-10 parts of inorganic salt and 5-10 parts of solid particles, 30-40 parts of inorganic acid, 2-5 parts of complexing agent and 10-20 parts of water. According to the method, the waste glass frosting liquid is effectively treated, the supernate is converted into the pickling solution, and the precipitate is compounded and reused, so that the total discharge amount and discharge times of the waste liquid are greatly reduced, the recycling of resources is effectively promoted, and the win-win situation of economic benefit and environmental protection is realized.

The invention belongs to the technical field of water purification materials, and particularly relates to a gelatin coated TiO2-polypyrrole composite material as well as a preparation method and application thereof. The preparation method comprises the following steps: adding the polysorbate-80 into the paraffin oil, and stirring at 30-60 DEG C for 20-50 minutes to obtain an oil phase; heating water to 40-60 DEG C, then adding gelatin and the TiO2-polypyrrole composite precursor material, and stirring for 20-50 minutes to obtain a water phase; adding the water phase into the oil phase, and stirring for 30-60 minutes to obtain a mixed solution; and cooling the obtained mixed solution to 2-10 DEG C, then adding ethanol, stirring for 15-40 minutes, then sequentially washing with acetone and isopropanol, and freeze-drying the obtained solid matter, thereby obtaining the product. The polypyrrole and the gelatin contain functional groups such as amino groups, carboxyl groups and the like, and can form a complex with lead ions, so that the adsorption activity of the nano TiO2 material can be effectively improved, and the lead removal performance of the material is improved. The composite material disclosed by the invention shows very good removal rate and adsorption efficiency on lead ions in water.

The invention provides a polishing and etching method for a crystalline silicon solar cell. The polishing and etching method comprises the following steps: S1, polishing the back surface of a silicon wafer by using a mixed solution of KOH and an alkali polishing additive; s2, using a mixed solution of KOH and H2O2 to carry out a first round of post-cleaning on the silicon wafer; s3, performing a first round of hydrophobic pickling on the surface of the silicon wafer by using an HF solution; s4, using a mixed solution of KOH and H2O2 to carry out a second round of post-cleaning on the silicon wafer; s5, performing a second round of hydrophobic pickling on the surface of the silicon wafer by using an HF solution; and S6, drying the silicon wafer. According to the polishing and etching method of the crystalline silicon solar cell, the production efficiency is improved, the cost is reduced, and the environmental protection property is enhanced by optimizing the whole process steps.

The invention discloses a copper-containing mesoporous complexing adsorbent with a high-dispersion active site and preparation and application thereof, and is characterized in that the complexing active site is highly dispersed by utilizing a threshold limiting space in lanthanum-doped mesoporous silicon oxide raw powder and the action between a lanthanum element and the complexing active site; the copper-containing mesoporous complexing adsorbent with high dispersion active sites is prepared; wherein the lanthanum-silicon ratio in the lanthanum-doped mesoporous silica raw powder is 0.01-0.1, the active site is Cu < + >, and the mass ratio of copper oxide to a carrier in the prepared mesoporous molecular sieve material dispersed with copper oxide is (0.1-1): 1. The copper-containing mesoporous complexing adsorbent with the high dispersion active site has a complexing adsorption effect and can be applied to olefin / alkane separation.

The application provides a copper-nickel alloy catalytic electrode and a preparation method and application thereof. The copper-nickel alloy catalytic electrode comprises a nickel foam substrate and a copper-nickel alloy vertically loaded on the surface of the nickel foam substrate, the molecular formula of the copper-nickel alloy is Cu 0.81 Ni 0.19 , and the copper-nickel alloy is a nanostructure with a dendritic morphology. The preparation method comprises the following steps: adding copper sulfate, nickel sulfate and ammonium sulfate into water, stirring uniformly to obtain an electrolyte; taking the nickel foam substrate as a working electrode, a saturated silver-silver chloride electrode as a reference electrode, a platinum sheet or a graphite rod electrode as a counter electrode, applying a constant current density to the working electrode to obtain a preset electrode; alternately cleaning the preset electrode with ethanol and distilled water, and vacuum drying to obtain the copper-nickel alloy catalytic electrode. The copper-nickel alloy catalytic electrode prepared by the application has a dendritic morphology, rich active sites and a high specific surface area, and has excellent catalytic activity and stability in the hydrogen production by the electro-catalytic coupling hydrogen evolution reaction of cyclohexanone synthesis adipic acid.

The invention discloses a hot-melt fiber-based rigid filter material and a preparation method thereof, and relates to the field of filter materials. When the hot-melt fiber-based rigid filter material is prepared, zinc oxide nanorods and silver nitrate are uniformly mixed and then react with 3-glycidyl ether oxypropyl trimethoxy silane, 2, 2 '-bipyridine methylamine and maleic anhydride in sequence to obtain functional silver-loaded zinc oxide nanorods; the preparation method comprises the following steps: reacting 4, 4 '-difluorobenzophenone, hydroquinone and 3, 3', 5, 5 '-tetramethyl biphenol, brominating, and grafting N-vinyl imidazole to obtain modified polyether-ether-ketone; and uniformly mixing the modified polyether-ether-ketone, the functional silver-loaded zinc oxide nanorod and ammonium persulfate, and carrying out melt spinning and hot-pressing film formation to prepare the hot-melt fiber-based rigid filter material. The prepared hot-melt fiber-based rigid filtering material has excellent mechanical property, heavy metal ion complexing property, antibacterial property and anion adsorbability.

The invention discloses a method for safely producing rice in cadmium-contaminated soil, which comprises the following steps: adding a soil conditioner into the cadmium-contaminated soil for treatment, and planting rice after treatment is completed, the soil conditioner at least comprises a humic acid loaded nano zero-valent iron material, and the humic acid loaded nano zero-valent iron material is provided with a humic acid-based carrier and a nano zero-valent iron material loaded on the humic acid-based carrier. According to the method for safely producing the rice in the cadmium-polluted soil, the effective cadmium content of the polluted farmland soil can be effectively reduced, the rice yield is increased, meanwhile, the cadmium content in rice grains is reduced, and an effective solution is provided for agricultural sustainable development.

The invention relates to the technical field of desulfurization and dearsenification, and discloses a phosphorus chemical front-end desulfurization and dearsenification treatment device, which comprises a reaction tank provided with a pH regulator and a temperature controller, the top of the reaction tank is provided with a cover plate, and the bottom of the cover plate is provided with a conditioner storage tank. Through the structural design that the diameter of a surface push plate is smaller than that of a deep push plate, a guide block is combined to enable a stirring shaft to move up and down during rotation, the deep spraying amount of a conditioner is higher than that of a surface layer, the requirements of high phosphorite particle concentration and more severe reaction caused by gravity of the deep layer of a reaction tank are automatically met, and the complexing effect of deep calcium ions and iron ions is enhanced; meanwhile, by means of sliding fit of the adjusting rod and the cam groove, the spraying amount is automatically increased when the spray head moves from the outer layer to the inner layer, the core area requirements that the inner layer is large in stirring strength and more sufficient in reaction are met, the problems of sediment wrapping or low reaction efficiency caused by insufficient local conditioner are effectively solved, and it is guaranteed that the desulfurization and dearsenification reaction is conducted uniformly and efficiently.

The invention provides a method for catalyzing an alpha, beta, gamma, delta-unsaturated ketone chiral boron addition reaction through a nano-composite microsphere supported copper material, and belongs to the technical field of asymmetric catalyst.The method comprises the following steps that in a reaction solvent, alpha, beta, gamma, delta-unsaturated ketone chiral boron addition reaction is carried out, and alpha, beta, gamma, delta-unsaturated ketone chiral boron addition reaction is carried out; the preparation method comprises the following steps: carrying out chiral boron addition reaction on beta, delta-unsaturated ketone and B2 (pin) 2 under the action of a nano-composite microsphere loaded copper material and a chiral ligand to obtain a 1, 4-chiral boron compound; a carrier of the nano-composite microsphere loaded copper material is a PS-CS-SiO2 nano-composite microsphere, the PS-CS-SiO2 nano-composite microsphere is composed of PS monodisperse microsphere powder, SiO2 and chitosan, and an active component Cu < 2 + > is loaded on the PS-CS-SiO2 nano-composite microsphere. 3-7 mg of the nano composite microsphere loaded copper material is added into every 0.2 mmol of alpha, beta, gamma, delta-unsaturated ketone. The nano-composite microsphere loaded copper material is used as a catalyst to catalyze alpha, beta, gamma, delta-unsaturated ketones to perform chiral boron addition reaction, and the nano-composite microsphere loaded copper material is used as a novel catalytic material, can be recycled, and is green and environment-friendly.

The invention relates to the technical field of batteries, in particular to a lithium ion secondary battery. The positive plate of the lithium ion secondary battery is provided with a first surface and a second surface along the thickness direction, the first surface is provided with a plurality of convex parts, and the second surface is provided with a plurality of concave parts; the diameter D1 of the orthographic projection of each convex part on the first surface and the length D2 of the straight section between any two convex parts meet the condition that D1 / D2 is 0.01-20; the electrolyte comprises a first nitrile compound with the chemical formula of # imgabs0 #, R0 is selected from at least one of # imgabs1 #, and the weight content of R0 in the electrolyte is 0.2%-3.5%; the weight content of the third nitrile compound in the electrolyte is less than or equal to 2%; the lithium ion secondary battery provided by the invention has good high-temperature cycle performance, high-temperature storage performance and safety performance.

The invention discloses a preparation method of a glutamic acid mycoprotein ecological fertilizer, which comprises the following steps: firstly, adding polysilicate zinc into glutamic acid fermentation waste liquid, and filtering to obtain a mycoprotein-polysilicate zinc complex; zinc silicate and hydroxyapatite are added, and amino acid composite hydroxyapatite particles are formed under the action of citric acid; and spraying the urea-humic acid-dipotassium phosphate complex onto the amino acid composite hydroxyapatite particles to obtain the ecological fertilizer. According to the ecological fertilizer, mycoprotein in the glutamic acid fermentation waste liquid can be fully utilized, a good slow release effect of nitrogen, phosphorus and other elements can be achieved through the effects of the two complexes, and in addition, the addition of silicon and zinc elements can achieve a supplement effect on the growth of crops; therefore, the fertilizer provided by the invention has dual effects of environmental protection and long-acting slow release, and has a good promotion effect on the growth of crops.