79results about How to "Effective complexation" patented technology

The invention discloses a high-salinity non-aqueous electrolyte. The high-salinity non-aqueous electrolyte comprises a lithium salt and a non-aqueous organic solvent, and the concentration of the lithium salt is 2-10mol/L. The invention also discloses a use of the high-salinity non-aqueous electrolyte in a lithium or sodium cell system. The high-salinity non-aqueous electrolyte has the advantages of high thermal stability, low volatility, high safety, electrochemical widow and aluminum foil corrosivity, and lithium or sodium dendrite overcoming.

The invention provides a composite soil adsorbent for preventing high-content soil in concrete from adsorbing a poly-carboxylic water reducer, and a preparation method and using method of the composite soil adsorbent. The composite soil adsorbent is prepared from the following raw materials by mass percent: 10 to 20% of a dispersion thinner, 5 to 10% of a retarder, 0.5 to 2.5% of an ion complexing agent, 0.2 to 0.5% of a surfactant and the balance of water. The preparation method comprises the following steps: stirring the dispersion thinner and water in a reaction kettle until the dispersion thinner is dissolved completely to obtain an even solution; adding the retarder and the ion complexing agent, and stirring until the retarder and the complexing agent are dissolved completely; finally, adding the surfactant, heating by a water bath, and stirring uniformly, so as to obtain a product. The using method comprises that the mixing amount of the composite soil adsorbent which is used cooperatively with a poly-carboxylic water reducer mother solution or replaces a part of the poly-carboxylic water reducer mother solution is 0.2 to 0.5% of that of a cementing material. By adoption of the composite soil adsorbent, the preparation method and the using method, the adsorbing of the soil to the poly-carboxylic water reducer is reduced, therefore, the comprehensive properties of the concrete are improved remarkably, and the problem of poor usability of the poly-carboxylic water reducer in the concrete with high soil content is solved.

The invention belongs to the technical field of polymer electrolytes, and particularly relates to a boron-containing gel polymer electrolyte and a preparation method and application thereof. The gel polymer electrolyte is prepared from lithium salt, an organic solvent, a photoinitiator, boron-containing heterocyclic photosensitive monomers and acrylate monomers in a copolymerization mode. The preparation method of the gel polymer electrolyte includes the steps that a compound containing boric acid groups and an alkene compound with a diol structure are esterified to obtain boron-containing heterocyclic alkene monomers, and the boron-containing heterocyclic alkene monomers, the acrylate monomers, the photoinitiator, the lithium salt and the organic solvent are uniformly dispersed; a mould containing the mixed solution is irradiated by an LED lamp for surface photo-initiated polymerization, and the boron-containing gel polymer electrolyte is obtained. The boron-containing gel polymer electrolyte has high ionic conductivity and a high cationic transference number, effectively solves the problems of liquid leakage, corrosion, poor mechanical performance and the like of a liquid electrolyte in traditional lithium-ion batteries and can be applied to preparation of supercapacitors, lithium-ion batteries, hybrid supercapacitors and the like.

The invention provides a fast and accurate method for measuring free acid concentration in acid liquid. An automatic potentiometric titrator is used to measure total acidity of the acid liquid. EDTA (ethylene diamine tetraacetic acid) which prevents iron ions, aluminum ions and the like from hydrolyzing is used as a screening agent to eliminate influence of hydrolysis of the iron ions, the aluminum ions and the like to free acid measurement. The defect that pH jump of the free acid is fully or partially covered during automatic potentionmetric titration is avoided. Jump of equivalent point is increased, and accuracy of the measurement is increased. An analysis result is automatically calculated according to an input formula. Operation time from analysis to result obtaining is shortened to less than 10 minutes. In addition, the method is low in sampling amount, fine in reproducibility, and accurate in analysis results. By the method, labor intensity of analysts is reduced, and labor productivity is emancipated.

The invention discloses a copper cleaning agent and a preparation method thereof. The copper cleaning agent disclosed by the invention consists of an inorganic acid, an organic acid, a surfactant, a penetrating agent, an emulsifier, a defoaming agent, a complexing agent and water. The inorganic acid and the organic acid are compounded, the hazards to health of cleaning workers caused by individual use of the inorganic acid in the traditional cleaning agent are avoided, over etching of a copper workpiece is also avoided, the copper cleaning agent is an environmental-friendly cleaning agent and has a certain oiliness, an effect of cleaning dirt such as oil attached to the surface of a copper part is improved by using the cleaning agent, the cleaning agent solution is acidic, and the oxide skin on the surface of the copper part can be well removed. The cleaning agent prepared by the invention is simple in using method, the copper part only needs to be soaked at normal temperature for 2-5 minutes so as to be cleaned, no greasy dirt residue is left on the cleaned copper part, the color of the surface of the copper part is the copper base color, and the cleaning effect is obvious. The copper cleaning agent disclosed by the invention is simple in preparation method, low in cost and obvious in effect and is suitable for industrial production and application.

The invention discloses a high-voltage lithium-ion battery with a Si/C composite anode. The high-voltage lithium-ion battery comprises a cathode, an anode as well as a separator and a non-aqueous electrolyte placed between the cathode and the anode, wherein the active substance of the cathode is lithium transition metal oxide; the active substance of the anode is a Si-based substance; the separator is a ceramic separator; the non-aqueous electrolyte comprises a non-aqueous organic solvent, lithium salt and an additive, the additive comprises FEC (fluoroethylene carbonate) and isocyanurate compounds in the mass ratio being (6-36):1. Compared with the prior art, the lithium-ion battery using the electrolyte has excellent normal-temperature cycle performance, high-temperature cycle performance and high-temperature storage life, and the gas output in the high-temperature storage process can be remarkably reduced.

The invention discloses a processing method capable of preventing abalone soup cans from blackening. The method comprises the following steps: timely performing anti-blackening color protection process treatment for three times during fishing of abalone, workshop pretreatment and pre-boiling and soup-loading process, and then performing sterilization and storage. Through the three times of timely continuous anti-oxidation and anti-blackening color protection treatment with seamless oxygen contact, the original color, luster and quality of products can be effectively kept.

The invention provides a preparation method of a heteroatom-doped carbon-based non-noble metal compound electrocatalyst. The preparation method comprises the following steps of A) mixing a carbon precursor obtained by oxidization processing on a carbon raw material and acidulated graphite-phase carbon nitride in an aqueous solution, and then adding a transition metal salt and a precipitant to obtain a composite precursor; and B) performing thermal processing on the composite precursor to obtain the heteroatom-doped carbon-based non-noble metal compound electrocatalyst, wherein different-polarity charges are carried on a surface of the carbon precursor and a surface of the acidulated graphite-phase carbon nitride in the aqueous solution. By the method for processing the composite precursorby one step, effective control on types and content of heteroatom doping and types, morphology and dispersibility of metal compound constituents is simply and effectively achieved, very high mutual bonding force and synergic effect are achieved among the heteroatom-doped carbon-based non-noble metal compound composite material constituents, and excellent performance is shown when the heteroatom-doped carbon-based non-noble metal compound electrocatalyst is used as an electrocatalytic oxidization-reduction catalyst.

The invention discloses a tin dioxide/porous carbon composite lithium battery negative electrode material and a preparation method. The preparation method comprises the following steps: with fibroin and a high molecular polymer PAMAM as precursors, soaking a fibroin/PAMAM composite material after freeze drying treatment in a stannous sulfate aqueous solution for sufficient adsorption; performing high-temperature calcination to obtain the lithium battery negative electrode material. Sn<2+> and amino groups (mainly tertiary amino groups) in the PAMAM dendrimer can generate an effective complexing action so that the SnO2 nanoparticles are in-situ compounded on the surface of the fibroin/PAMAM; therefore, the yield of tin dioxide/porous carbon compound is higher, the uniform stability is better, and a lithium ion battery negative electrode material with high specific capacity and long cycle life is prepared finally.

The invention relates to a composite sponge absorbent capable of rapidly and efficiently absorbing mercury ions in aqueous solution and preparation and application methods thereof. The preparation method comprises taking cellulose, lignin and wheat protein powder, which are low in price and easy to acquire, as base materials, performing high-speed dispersion to obtain a suspension, then adding inchitosan, chitin and polyvinyl alcohol or polyethylene glycol of different quantities, and through a simple crosslinking and freeze-drying combined method, preparing the compound sponge absorbent. Overall preparation processes are implemented in aqueous solution and accordingly are simple in processes and operation without special technical equipment, thereby being low in cost. The prepared compound sponge absorbent is rapid in absorbing speed, high in selective absorption to mercury ions, low in influence of pH, recyclable, green and environmentally friendly, thereby having a good applicationprospect during practical heavy metal wastewater treatment.

A viscosity stabilizing agent used for polymer flooding is characterized by comprising components in percentage by mass as follows: 5%-8% of 2-mercapto benzimidazole, 2%-3% of hydroquinone, 10%-15% of sodium thiosulfate, 10%-15% of isothiazolinone, 5%-10% of glutaraldehyde, 6%-10% of isopropanol, 1%-2% of EDTA (ethylene diamine tetraacetic acid), and the balance of water. The viscosity stabilizing agent used for polymer flooding can improve viscosity stability of a polymer flooding system, the viscosity maintaining time is long, so that on the condition of oilfield wastewater preparation, the viscosity of the polymer flooding system maintains stable and is improved in a certain range, the field application effect of the polymer flooding is improved, the effect is remarkable, and the viscosity stabilizing agent is suitable for popularization and application.

The present invention provides a polymer viscosity stabilizer, which comprises, by mass, 40-50% of thiourea, 20-30% of sulfite, 5-10% of EDTA, and the balance of water, wherein the sulfite is sodium sulfite, potassium sulfite or ammonium sulfite, and the polymer viscosity stabilizer is prepared by using a mixing stirring process, and is applied in the polymer flooding tertiary oil recovery process. With the polymer viscosity stabilizer, viscosity stability of the sewage polymer solution can be improved, the viscosity stabilizing time is long, the seepage resistance of the sewage polymer solution can be increased, the rheology control capability of the sewage polymer solution can be improved, and the polymer flooding oil increase effect can be increased.

The invention discloses a method for recovering gold from gold-containing barren solution and purifying the barren solution. In the method, sulfuric acid is added into gold-containing cyanide barren solution to perform acidification precipitation, pH value of the solution is regulated to be less than or equal to 2, ferrocyanide, copper, zinc and lead in the gold-containing cyanide barren solution are separated and removed from the gold-containing cyanide barren solution in a precipitate mode; lime is added into the separated acidic supernatant for neutralizing until the pH value is between 10 and 12, and formed calcium sulfate precipitate is removed; and a calcium removing agent is added into the separated basic supernatant, the formed precipitate is removed, and the separated supernatant is returned to the gold leaching process, wherein before the acidification precipitation step, a bactericide is added to the gold-containing cyanide barren solution, and the gold-containing cyanide barren solution is subjected to multi-medium filtration, microfiltration and first nano-filtration in sequence. According to the method for recovering gold from the gold-containing barren solution and purifying the barren solution, the dosage of acid agent is greatly reduced, and the treatment cost for the barren solution is reduced.

The invention designs and synthesizes host-guest assembled supramolecular gel based on the functionalization of trimesoyl chloride. N-amino-1, 8-naphthalic anhydride functionalized trimesoyl chlorideas a main body and 4-amino pyridine-functionalized trimesoyl chloride as a guest are complex and assembled into the gel in a H2O-DMSO system. The supramolecular gel has good fluorescence emission properties and emits yellow-green fluorescence when the excitation wavelength is 380nm. A series of aqueous cationic solutions are added to the supramolecular gel, and only Fe<3+> can quench the fluorescence of the supramolecular gel. In the metal gel TG-Fe formed by coordination of the supramolecular gel and Fe<3+>, a series of anions are added respectively. Only H2PO4<-> can restore the fluorescenceof the metal gel TG-Fe. This competitive coordination recognition property has an important application value in the field of ion identification.

The invention discloses an anti-seismic prefabricated house, comprising a plurality of steel plates, wherein the outer side of each steel plate is treated by a phosphating solution to form a phosphating film, and the phosphating solution comprises the following components in parts by weight: 35-45 parts of phosphoric acid, 0.2-0.4 parts of copper nitrate, 20-25 parts of zinc oxide, and 10-15 partsof compound accelerant. The anti-seismic prefabricated house provided by the invention has the advantages: as the main film-forming materials, the phosphoric acid and zinc oxide can form a continuous and uniform phosphating film on the surface of the processed. Meanwhile, the addition of the compound accelerator further improves the film forming speed and film forming quality of the phosphatingfilm. In addition, because the electrode potential of copper is higher than that of iron, copper ions are reduced and deposited on the surface of a phosphated hinge body, so the cathode area on the surface is increased; the electrochemical reaction of phosphating is further promoted, the formation of phosphating crystal nucleus is accelerated, crystal grains are refined, and the phosphating film is compact and uniform; meanwhile, the phosphating speed is improved, the phosphating temperature is reduced, and finally the phosphating film has the advantages of compact film formation and strong adhesive force.

The invention discloses a method for preparing a polycrystalline SnSe2 material by a solution method. The method comprises the steps that selenium powder is dispersed in an oleic acid solution to obtain a precursor solution A of a selenium source; then water vapor of the precursor solution A is removed under vacuuming conditions to obtain an environment without oxygen or water vapor; then the temperature rises, heating and heat preservation are conducted, and the precursor solution A is sucked to be added into a mixed solution B composed of a stannum source and ethanol to obtain a mixed solution C, wherein the volume ratio of the precursor solution A to the mixed solution B is (5-7):(25-30); then the mixed solution C is subjected to an alcohol thermal reaction, and drying is conducted to obtain SnSe2 powder. The preparation method is simple, the repeatability is high, the addition of any catalyst is not needed, expensive and complicated equipment is not involved, waste liquid generatedby the reaction is easy to handle, and the method is friendly to the environment and an operator.

The invention relates to a preparation method for an acidic fertilizer. The preparation method comprises the following steps: mixing of phosphoric acid with urea; reaction after completion of mixing;and granulating and drying. The acidic fertilizer provided by the invention comprises urea phosphate and ammonium bisulfate and has a pH value of 2.5 to 3.5, so the pH value of alkaline soil can be reduced, and the volatilization loss of ammonium nitrogen in the alkaline soil is reduced; in addition, the stability of amide nitrogen can be increased, and activation effects can be exerted on phosphorus and medium-trace elements; meanwhile, the phosphorus can be avoided from fixation by elements like calcium and magnesium, and the moving ability of the phosphorus is improved; when the pH value ofthe acidic fertilizer is lower than 2.5, the acidic fertilizer has too great viscosity and is easy to absorb moisture; and when the pH value of the acidic fertilizer is excessively high, the pH valueof soil can not be effectively reduced, and the purpose of activating the phosphorus and the medium-trace elements can not be achieved.