96 results about "Metal dissolution" patented technology

A high-voltage electrolyte for a lithium ion battery and a lithium ion battery using the electrolyte are disclosed. The high-voltage electrolyte for the lithium ion battery comprises lithium salt, anorganic solvent and an additive. Wherein the organic solvent comprises one or more of a chain carbonate esters, cyclic carbonate esters, carboxylic esters, silicon-substituted organic solvents, wherein the additive comprises a polynitrile compound, and the preparation method of the lithium ion battery comprises injecting the high-voltage electrolyte for the lithium ion battery into a sufficientlydried lithium cobalt oxide/graphite soft-clad battery of 4.45 V, carrying out the steps of shelving at 45 DEG C, high-temperature clamping formation and secondary sealing. The high-voltage electrolytefor lithium ion battery of the present invention can effectively inhibit metal dissolution, reduce decomposition gas production of the electrolyte, protect the positive electrode, improve high-temperature cycling performance and high-temperature storage performance of the battery, reduce the increase of impedance, and improve low-temperature performance of the lithium ion battery.

The invention relates to an organic metal framework derived cobalt/nitrogen carbon nano material as well as a preparation method and application thereof. The preparation method comprises the followingspecific steps: (1) stirring and dissolving Co(NO3)<2>.6H2O in methanol to prepare a Co(NO3)2 solution; stirring and dissolving 2-methylimidazole in methanol to prepare a 2-methylimidazole solution;pouring the 2-methylimidazole solution into the Co(NO3)2 solution, standing and aging the mixture at room temperature, centrifuging the mixture, and washing and drying a product to obtain ZIF-67; and(2) carrying out annealing treatment on the ZIF-67 obtained in the step (1), and carrying out acid pickling, water washing and drying to obtain the cobalt/nitrogen carbon nano material. Compared withthe prior art, the cobalt/nitrogen carbon material prepared by the method has the advantages of low metal dissolution, good reusability, a simple and convenient operation process, a wide pH application range and the like when being used for activating peroxydisulfate, and has wide application prospects in the field of treatment of degradation-resistant organic matter wastewater.

The invention relates to a transfer method of large area graphene. The transfer method comprises the following steps of: utilizing an etching solution to impair bonding force between a graphene film and a copper base on the graphene film on a metal base, and placing the metal base in water after water washing; causing one side of the metal base in contact with the graphene film to have water of a certain thickness, and placing the metal base in a freezing chamber to freeze; and isolating a graphene ice layer and transferring to a target substrate, and achieving transfer of the graphene after ice is melted. The transfer method provided by the invention adopts ice as a carrier, so that the method is simple, and omits the multifarious steps such as glue coating, metal dissolution and glue eliminating glue in the existing method; and avoids pollution caused by organic adhesive residue and a metal dissolution liquid on the graphene in the existing method, and is suitable for large-scale application and production of the graphene film.

The invention provides a preparation method of a graphene film of a titanium or titanium alloy surface. The method comprises steps as follows: a graphene film grows on a metal base, and a graphene film/metal base material is obtained; the graphene film/metal base material is covered with a layer of plastic film, and a plastic film/graphene film/metal base material is obtained; then the plastic film/graphene film/metal base material is placed in a metal dissolution medium for dissolution of the metal base, and a plastic film/graphene film material is obtained; after the plastic film/graphene film material is cleaned up, the surface, where the graphene film is located, of the plastic film/graphene film material is attached to the titanium or titanium alloy surface, the material is naturally dried for 12 h and then placed for drying, and a plastic film/graphene film/titanium or titanium alloy material is obtained. Thus, a titanium or titanium alloy implant coated with graphene is more suitable to be used as a medical implant material than a titanium or titanium alloy implant which is not coated with the graphene.

The present invention relates to an ultra-sonic device, which can be utilised in an aquatic environment to inhibit growth of waterborne flora and fauna. In particular, the present invention relates to a method of reducing such growth and the removal from the underside of yachts, boats and the like. In general, the present invention relates to anti-fouling systems as are known to prevent biological growth such as algae, seaweed and crustacea on marine vessels or underwater structures. Coating materials have been developed preventing corrosion due to oxidation of the surface of the structure. Although such materials have effects of retarding growth of the corrosion, however, they contain zinc, lead, copper, etc, raising a problem of environmental pollution due to dissolution of these metals into seawater. In addition, none of these coating materials can prevent clinging of marine organisms, and if they cling to the structure, oxidation is accelerated by oxygen sent out from the marine organisms, causing further growth of the corrosion of the structure. The formation of encrustations of barnacles, tunicates, and like fouling organisms, will increase the vessel's weight, thereby decreasing the available storage space, slow a vessel underway, increase its fuel consumption, and make it difficult to handle, thus reducing the vessel's performance and efficiency. The present invention addresses this need wherein the transducer is operable on a cyclic basis.

The invention relates to an imidazoline corrosion inhibitor, a synthetic method and application thereof, and is applicable to boiler anticorrosion in natural gas processing plant. The imidazoline corrosion inhibitor comprises main agent of rosin, and additives of bis(beta-aminoethyl) amineand N,N-dimethyl acetamide. In addition, on the basis of synthesis of imidazoline corrosion inhibitor, guanyl with closing-opening performance under the action of CO2 / N2 is introduced, so as to on the one hand improve the corrosion inhibition performance of on CO2, and on the other hand recycle the inhibitor. Finally, under simulated field conditions, when the dosage of the corrosion inhibitor is at 400 mg/L, the inhibition rate reaches 80%, and the corrosion rate and corrosion inhibition efficiency are good. The corrosion inhibitor mainly inhibits the cathodic hydrogen evolution reduction reaction as well as anodic metal dissolution effect, and belongs to a mixed type corrosion inhibitor focusing on anodic inhibition. The corrosion inhibitor provided by the invention has the advantages of low cost, simple and efficient usage mode, low toxicity, no stimulation, no odor and reduction of pollution on water and environment.

The invention provides an application of a calcium-manganese oxide catalyst in degradation of organic pollutants in wastewater and soil, and relates to the technical field of catalysis and environmental organic pollutant control. The calcium-manganese oxide (Cax(Mn1-aFea)yOz) catalyst is prepared by a sol-gel method and high-temperature calcination, and is used for activating persulfate to generate active substances with strong oxidizing property, such as sulfate free radicals, hydroxyl free radicals, singlet oxygen and the like, so that organic pollutants in water and soil are rapidly oxidized and removed. The catalyst disclosed by the invention is simple to prepare and environment-friendly, the contained elements are Ca and Mn elements which are low in toxicity, cheap and rich in the earth, the metal dissolution rate in the reaction process is low, and the problem of secondary pollution is avoided. In addition, the reaction system formed by the catalyst and persulfate can rapidly degrade phenol, bisphenol A, 2,6-dichlorophenol, parachlorophenol, paracetamol and other refractory organic pollutants, shows good performance in a wide pH range, and has great application potential.

The invention relates to a low temperature electrolyte for a lithium-ion power battery and a preparation method thereof. Components of the low temperature electrolyte comprise solvents and a solute, wherein the solvents are a mixture of ethylene carbonate, ethyl methyl carbonate, ethyl propionate and an additive. The preparation method comprises steps of uniformly mixing the solvents under a magnetic field and adding the solute. By the use of ethyl propionate, viscosity and eutectic point of the electrolyte system are reduced so as to help migration of lithium ion and reduce content of ethylene carbonate in the electrolyte. Thus, the electrolyte has low melting point and viscosity, and low temperature performance of the electrolyte is improved. By the use of lithium difluoroborate which has good heat stability and oxidation stability, metal dissolution potential of the electrolyte can be improved. The prepared lithium-ion power battery can raise low-temperature discharging efficiency by 15-20% and increase low-temperature mean voltage by 10-15%.

The invention discloses a method for accelerating liquor and spirits to age, and belongs to the technical field of liquor and spirits. The method comprises the following step of adding ceramic powdersinto the liquor and spirits to quicken aging speed of the liquor and spirits, wherein the particle size of the ceramic powders is 10-80 meshes. The method is low in cost, can quickly take effects andcan be easily used, ceramic jar powders are smashed into the ceramic powders, a specific surface area is enlarged, adsorption performance and metal dissolution speed are improved, liquor and spiritsoxidization and hydrogen bond association are accelerated, aging time of the liquor and spirits is shortened through esterification reaction, 10d aging acceleration is equivalent to an effect of beingstored in a ceramic jar in 5-6 months, and the production cost of the liquor and spirits is lowered.

The invention discloses a carbon nitride/alpha iron oxide heterojunction catalyst. The catalyst is combined with visible light, low-voltage bioelectricity and persulfate to construct a photoelectric auxiliary Fenton system, and is used for treating organic wastewater. The carbon nitride/alpha iron oxide catalyst has the advantages of visible-light response and low metal dissolution, forms a photoelectric auxiliary Fenton system taking carbon nitride/alpha iron oxide as a catalyst by being combined with a light source and a bioelectrical activation system, is applied to the treatment of persistent organic pollutant in organic wastewater, can show the advantages of high treatment efficiency, low energy consumption and high convenience in system operation management, and provides a new thought for the technology of organic wastewater treatment.

Disclosed is an electroless gold plating liquid for forming a gold plating film for wire bonding which is characterized by containing a gold cyanide compound and oxalic acid and/or a salt thereof, but not containing a foundation metal dissolution inhibitor. The gold cyanide compound is preferably contained in an amount of 0.5-10 g/L in terms of gold ion concentration, and the oxalic acid and/or a salt thereof is preferably contained in an amount of 5-50 g/L. Preferably, the electroless gold plating liquid also contains a masking agent for dissolved foundation metal, and the masking agent is preferably composed of ethylenediaminetetraacetic acid and/or a salt thereof.

The invention discloses a fast formed 3D false tooth. The fast formed 3D false tooth comprises a false tooth body and is characterized in that the false tooth body comprises an inner crown on the innermost layer, a porcelain layer is fixedly bonded to the outer side of the inner crown, and a gap is reserved between the inner crown and the porcelain layer and filled with a resin layer. Three-dimensional data of the false tooth is acquired by laser scanning, then the false tooth is produced on the basis of a dental model with the 3D printing technology, the false tooth can be produced fast, much time can be saved, the dimensions are more standard, workload of a dentist can be reduced, and working efficiency can be increased effectively; the porcelain layer of the false tooth is made of a titanium alloy, so that symptoms such as gum bleeding, black gums and the like can be avoided, the service life is quite long, the fluidity is high after metal dissolution, metal size is reduced, show space of the color of the porcelain tooth is increased, attractiveness is improved, the false tooth is simpler and more convenient to use, the cost of the titanium alloy is lower than that of a tooth with all porcelain crown and a precious metal porcelain tooth, and the false tooth can be accepted.

The invention provides a preparation method of a battery diaphragm coating material. The preparation method comprises the following steps that: PVDF and a covalent organic framework material are dissolved in an organic solvent, and are uniformly stirred; the ratio of the PVDF to the covalent organic framework material to N-methyl pyrrolidone is 20:(70 to 85):(5 to 10). When the material is appliedto the preparation of a lithium ion battery diaphragm, the problem of metal dissolution which appears when a transition metal oxide is used as a positive electrode material can be effectively solved;and the prepared diaphragm can effectively adsorb metal ions and prevent the metal ions from being deposited to a negative electrode in a charging and discharging process, so that the cycle performance of the transition metal oxide positive electrode material is improved.

The invention discloses a method for reducing metal dissolution in domestic waste incinerator slag. The method comprises the following steps that (1) domestic waste incinerator slag particles are crushed into particles with the particle size below 5 mm; (2) the crushed domestic waste incinerator slag is put into a reaction kettle, and citric acid solution is added until the crushed domestic wasteincinerator slag is just immersed for soaking; (3) MgCl2 is added into the reactor kettle, a reaction kettle heater is started to make the temperature in the reaction kettle reach 650-750 DEG C, meanwhile, carrier gas is stared, heat preservation is conducted for 1.5-2.5h, then the temperature is further raised to 900-950 DEG C, heat preservation is conducted for 1.5-2.5h, and gas in the reactionkettle is exhausted from an exhaust pipe, enters a condenser, and then enters a tail gas purifying device for being exhausted; and (4) the reaction kettle after the heat reaction is finished is cooledto the room temperature, the domestic waste incinerator slag is taken out, and condensation products at different heat preservation stages in the condenser serve as metal enriched products and are recycled in batched. The method for reducing metal dissolution in the domestic waste incinerator slag can reduce metal dissolution in the domestic waste incinerator slag, and meanwhile, metal in the domestic waste incinerator slag is recycled.

The present invention relates to a method for dissolving metals by photocatalysis. A metal-containing material to be dissolved is dispersed in a mixed solution of photocatalyst-containing cyanide and organic chloride; then, a photocatalyst is added; next, an oxygen-containing gas or a substance which is capable of generating oxygen is introduced; and irradiation is applied for a period of time to dissolve metals. Compared with the prior method, the present invention is advantageous in moderate reaction condition, energy conservation, environmental protection, low cost, and convenient operation, and is suitable for mass industrial treatment on metal dissolution.

The invention relates to a titanium nail and a soft tissue fixation device containing the titanium nail, belonging to the technical field of medical equipment. The titanium nail provided by the invention is formed by spirally bending a titanium alloy wire material; a titanium alloy is prepared from 5.5 weight percent to 6.0 weight percent of Mo, 1.5 weight percent to 2.0 weight percent of Zr, 0.3 weight percent to 0.5 weight percent of Mg, 0.05 weight percent to 0.15 weight percent of Nb and the balance of Ti. The titanium alloy wire material is subjected to micro-arc oxidation surface modification treatment; adopted electrolyte is prepared from 1.5 weight percent to 2.0 weight percent of sodium citrate, 0.10 weight percent to 0.2 weight percent of sodium borate, 0.05 weight percent to 0.10 weight percent of glycine and the balance of water. The titanium nail provided by the invention has good mechanical property; especially, the titanium nail is subjected to special modification treatment, so that the titanium nail has the advantages of excellent corrosion resistance, less metal dissolution and good compatibility. The soft tissue fixation device containing the titanium nail provided by the invention is suitable for laparoscopic herniorrhaphy, and has the features of prevention from adhesion and convenience in operation.

The invention discloses a preparation method of a porous spherical silicon-based composite negative electrode material. The method comprises steps of (1) introducing a certain amount of high-purity gaseous silicon tetrachloride into mixed solution A containing metal salt, carbon source precursor and metal-based silicon alloy, hydrolyzing silicon tetrachloride to generate hydrogen chloride and silicon dioxide, under the condition of continuous stirring, dissolving and removing the metal in the metal-based silicon alloy by hydrogen chloride to obtain a porous silicon skeleton matrix, depositingsilicon dioxide generated by hydrolyzing silicon tetrachloride to coat on the porous silicon skeleton, then carrying out hydrothermal reaction to obtain silicon/silicon dioxide particles B which aredoped with metal ions in situ and coated with the carbon source precursor; and (2) carrying out high-temperature treatment of the material B in a protective atmosphere to obtain a lithium ion batterysilicon-based composite negative electrode material with high specific capacity, good cycle performance and excellent rate capability. The method is advantaged in that the method is simple, and the prepared silicon-based composite negative electrode material is good in dispersity, uniform in surface coating, high in specific capacity and good in cycle performance.

The invention discloses a method for improving copper dissolving efficiency by using oxygen rich waste acid gas of an electrolytic copper foil, aims to provide a method for improving copper dissolving efficiency by returning oxygen rich waste acid gas produced in the copper foil electrolysis process to a copper dissolving tower, and belongs to the technical field of metal dissolution. According to the method, after the oxygen rich waste acid gas generated in the electrolytic copper foil production process is collected, the oxygen rich waste acid gas is directly introduced into the copper dissolving tower through a delivery pipeline and used as an oxygen source or a partial oxygen source for dissolving copper. By the method, the oxygen rich waste acid gas is effectively utilized, the waste is changed into valuable, the dissolving speed of metallic copper is quickened, the production cost of the copper foil is reduced, the production efficiency is improved, the energy is saved, and the environment is protected.

The invention relates to a rapid detection method for the cycle life of a positive electrode material. Specifically, the invention relates to a rapid detection method for the cycle life of a LiFePO4 positive electrode material, and the method comprises the following steps: (1) mixing powder of the LiFePO4 positive electrode material with an acidic solution to carry out a reaction; (2) carrying outsolid-liquid separation on the reaction mixture to obtain filtrate and insoluble substances; and (3) detecting the concentration CFe of the metal element Fe in the filtrate, and evaluating the cyclelife of the LiFePO4 positive electrode material according to the concentration CFe of the metal element Fe. By adopting the method disclosed by the invention, the metal dissolution properties of different LiFePO4 positive electrode materials can be rapidly detected and compared, so that the cycle life of the positive electrode materials and the cycle life of a battery cell or a battery obtained from the positive electrode materials can be rapidly predicted. The method disclosed by the invention is particularly used for evaluating the service life of the LiFePO4 positive electrode material andselecting the long-service-life LiFePO4 positive electrode material.

The invention belongs to the field of waste circuit board metal recovery, and discloses a method for recovering circuit board metal on the basis of a drum type anode rotary electrolysis device. The method comprises the following steps that a circuit board is crushed into fine fragments, primarily screening and separating are conducted to obtain the metal enrichment and the non-metal enrichment; the metal enrichment is put into a drum-type anode rotary electrolysis device for acid leaching to dissolve active metal tin or nickel, and an acid leaching solution is discharged; an electrolyte is added into the drum-type anode rotary electrolysis device, electrolysis is conducted by electrifying, and copper is recovered by electrolyzing; and then the anode filter residue is conveyed into a flotation agent for flotation, the noble metal and resin can be separated, and finally the noble metal is further separated by smelting. The method is reasonable in design, convenient to operate, high in metal dissolution rate, simple and efficient in process and capable of separating and recovering metal and resins from the scrapped circuit board.

The invention relates to a photocatalytic selective metal dissolving agent and a dissolving method. The photocatalytic selective metal dissolving agent is a cyanide compound solution containing a photocatalyst, the water content in the cyanide compound solution is 0-50 wt%, and the content of the photocatalyst in the cyanide compound solution is 0.01-50 mg/mL. The photocatalytic selective metal dissolving method comprises the following steps that a metal material is dispersed into the photocatalytic selective metal dissolving agent, and selectively dissolving is carried out on each metal in the metal material after light irradiation for a certain period of time. Compared with the prior art, existing understanding of a precious metal selective dissolution process is broken through, and thephotocatalytic selective metal dissolving agent and the dissolving method have guiding significance for evolution of metal in the environment and metal exploitation or metal separation and purification treatment.

The invention relates to a method for photocatalytic dissolution of metal by using a phosphate radical modified photocatalyst. The method comprises the following steps that a metal-containing material to be dissolved is dispersed into a mixed solution containing a nitrile compound and an organic chloride, an inorganic phosphate radical modified photocatalyst is added, oxygen is introduced or a substance capable of generating oxygen is added, metal is dissolved under the condition of light irradiation, and after the metal is dissolved, a metal organic coordination compound is formed in the solution and has the general formula of (NH4) xMCly. Compared with the prior art, the preparation process of the photocatalyst is simple and convenient, after inorganic phosphate modification, oxygen adsorption can be improved, more superoxide free radicals are generated, visible light absorption of the catalyst can be improved so as to enhance the reaction rate of photocatalytic dissolution of metal, a feasible scheme is provided for actual production development, and the method has extremely high application value in the aspects of waste metal dissolution and recovery, photocatalytic oxidation reaction and the like.