253 results about "Electrolytic process" patented technology

The invention relates to the technical field of model construction, in particular to a construction method and system of an electrolysis energy consumption model and a storage medium. The method comprises the following steps: collecting electrolysis process parameters by using a multi-mode sensor system, wherein the electrolysis process parameters comprise a current value, a voltage value, an electrolyte temperature and electrolysis time; constructing an electrolysis energy consumption initial model based on the electrolysis process parameters, and inputting the electrolysis process parameters into the electrolysis energy consumption initial model to output a unit product energy consumption value and a current-voltage efficiency curve; electrolytic bubble acoustic monitoring is conducted on the side wall of the electrolytic cell to obtain bubble breakage acoustic wave signals; and analyzing the sound intensity and the rupture frequency of the bubble rupture sound wave signal. According to the method, through the multi-modal sensor, multi-dimensional signal analysis and dynamic parameter correction, the defects of single data and static state of a traditional electrolysis energy consumption model are broken through, and high-precision dynamic modeling and optimization of energy consumption in the electrolysis process are achieved.

The invention belongs to the technical field of light metal smelting and nano materials, and particularly discloses a nano aluminum powder electrolysis preparation method based on ionic liquid. The method comprises the following steps: mixing an ionic liquid, an additive and AlCl3 to obtain an electrolyte, and carrying out an electrolytic reaction by taking aluminum as a cathode and an inert electrode as an anode to prepare nano aluminum powder; the additive is specifically halide salt. The halide salt is added as an additive and can partially replace ionic liquid, so that the preparation cost of the nano aluminum powder is reduced; in addition, the halide salt can also avoid the phenomenon that the aluminum powder is adhered to the cathode, so that the particle size of the obtained nano aluminum powder becomes smaller and is more uniform, the nano aluminum powder with narrower particle size distribution is obtained, and the related performance during application is improved. The preparation method disclosed by the invention also has the advantages of low electrolysis temperature and low energy consumption, and the reaction can be protected by adopting a protective atmosphere in the electrolysis process, so that the preparation safety of the aluminum powder is greatly improved.

The invention discloses a rare earth metal electrolysis system and an electrolysis furnace thereof, and relates to the technical field of metallurgy, the rare earth metal electrolysis system is characterized by comprising a potential data acquisition and preprocessing module, a dendritic crystal feature extraction and quantification module, a dendritic crystal identification and intelligent determination module and an inverse pulse control and dynamic regulation module, in the electrolysis process, potential distribution original data of the surface of a rare earth metal cathode are detected and collected in real time, the obtained original data are preprocessed, and a preprocessed potential data set is established based on a time sequence. According to the method, intelligent, real-time and accurate inhibition of dendritic crystals in the rare earth metal electrolysis process is achieved, short circuit, splashing and electrode ablation are effectively prevented, the compactness and purity of metal deposition are improved, the current efficiency is remarkably improved, and compared with a traditional scheme, the method has the advantages of being high in real-time performance, good in inhibition effect, small in interference and high in adaptability, and the method is suitable for popularization and application. And efficient and safe preparation of the rare earth metal is ensured.

The invention provides a novel metal-based nano catalytic coating electrode and a preparation method thereof.The metal-based nano catalytic coating electrode comprises a metal matrix and a conductive mechanism, and the metal matrix is sequentially provided with a corrosion-resistant middle layer, a transition layer, a nano-doped ceramic oxide active layer and a porous enamel ceramic isolation layer from near to far; and the metal substrate is fixedly connected with the conductive mechanism. The metal base body is of a plate-shaped structure, a net-plate-shaped structure or a plate-column-shaped structure. The corrosion-resistant middle layer of the metal-based nano catalytic coating electrode can prevent the metal matrix from being passivated in the electrolysis process, so that the service life of the electrode is prolonged; the plated layer can be used as a bonding bridge between the metal matrix and the doped ceramic oxide layer, so that the stress generated by sudden change of temperature, crystal form and the like in the coating preparation process is reduced, and the bonding force between the coating and the metal matrix is greatly improved; the porous enamel ceramic isolation layer can effectively prevent a solution from scouring the doped ceramic oxide active layer, and the service life of the doped ceramic oxide active layer electrode is prolonged.

The invention discloses a green continuous production process of electrolytic manganese dioxide, which comprises the following steps: mixing a manganese-containing raw material and sulfuric acid according to a mass ratio of 1: (1.2-1.5), and then carrying out acid leaching at 80-90 DEG C for 2-3 hours to improve the manganese leaching rate to 91-98%; 10-15% hydrogen peroxide oxidation is combined with accurate regulation and control and flocculent precipitation of pH 5-6, so that the iron impurity residue is less than or equal to 5 ppm; in the electrolysis process, sulfuric acid is continuously supplemented to maintain the concentration of 150-180 g / L, the titanium-based lead dioxide anode and the stainless steel cathode are matched, and the current efficiency is 88-91.5%; and carrying out three-stage countercurrent washing and drying at 120-130 DEG C on the product to obtain the electrolytic manganese dioxide with the purity of more than or equal to 93%. The process provided by the invention is suitable for resource utilization of low-grade pyrolusite, and the obtained product is mainly used in the fields of lithium-manganese battery positive electrode materials, magnetic materials and catalyst carriers.

The utility model discloses waste water electro-desalting equipment, which belongs to the technical field of waste water treatment, and comprises a cooling tower and a cooling water tank arranged at the bottom of the cooling tower, the input end of the cooling tower is communicated and connected with a circulating water main pipe, the circulating water main pipe is communicated and connected with a circulating water branch pipe, and the circulating water branch pipe is communicated and connected with a circulating water outlet pipe. The output end of the circulating water branch pipe is connected with an electrochemical water treatment device, a large number of scale inhibition small molecules can be generated in the electrolysis process, a very good scale inhibition effect can be achieved, a dense ferroferric oxide (Fe3O4) protection film can be generated on the surfaces of a system pipeline and the pipe wall of heat exchange equipment by using an electrochemical technology for a long time in a circulating water system, and the service life of the circulating water system is prolonged. The corrosion rate of carbon steel equipment is less than or equal to 0.075; and when the electrochemical water treatment device continuously operates, a circulating water system can safely and stably operate in an energy-saving and zero-pollution manner for a long time.

The invention relates to the technical field of water pollution control and treatment, and particularly discloses electroplating wastewater heavy metal ion treatment equipment. The cathode bar is sleeved with the isolation cover provided with the multiple communicating grooves at intervals in the circumferential direction, and the annular mounting base with the lifting mechanism is slidably mounted outside the isolation cover, so that the clearing mechanism in the mounting base can dynamically clear sediments in the length direction of the cathode bar. The design of the communicating groove of the isolation hood not only allows electroplating wastewater to be in full contact with the cathode bar, but also restrains sediments in an area in the groove by limiting a fluid diffusion path, so that disordered diffusion of metal particles in the electrolytic tank is effectively prevented. And the lifting motion of the mounting seat is matched with the clearing mechanism, so that sediments on the surface of the cathode can be continuously stripped in the electrolysis process, the efficiency loss caused by shutdown clearing in a traditional aeration method is avoided, meanwhile, the secondary pollution risk of suspended sludge is reduced, and continuous and efficient recovery of heavy metal ions is realized.

Electrolysis device for arrangement in a water container (4), comprising: (a) at least one rotating cathode (120) mounted on an axis (112) and designed to rotate during an electrolysis process; (b) at least one stationary cathode cleaning element (140) configured to contact a surface of the rotating cathode (120) so that deposits are removed from the rotating cathode (120) during the electrolysis process while the rotating cathode (120) is rotating, wherein the at least one stationary cathode cleaning element (140) is pre-tensioned outwards so that a scraping edge (152 a,b) of the at least one stationary cathode cleaning element (140) is in contact with the surface of the rotating cathode (120), and wherein the stationary cathode cleaning element (140) is constructed with a support extension (156) wherein the curvature of the support extension (156) substantially corresponds to the curvature about the axis (112) and the support extension (156) bears against the surface of the axis (112), thereby providing suitable orientation of the stationary cathode cleaning element (140) is maintained with the scraping edge (152 a,b); and (c) at least one stationary anode (132) arranged adjacent to the rotating cathode (120).

The application belongs to the technical field of rare earth metallurgy, and discloses a method for preparing rare earth metal by electrolyzing molten salt. The method comprises the following steps: taking rare earth oxide as electrolytic raw material, and performing electrolysis in molten salt electrolyte under a protective atmosphere; and collecting the deposit after electrolysis, so that the rare earth metal is obtained. Through the synergistic effect of multi-dimensional process, the application successfully constructs an efficient, green and stable rare earth metal electrolysis preparation system. The system completely eliminates carbon pollution, significantly improves the stability of the electrolysis process and the quality of the product, realizes efficient and stable preparation of high-purity rare earth metal, and can meet the stringent requirements of high-end electronics, aerospace, high-performance permanent magnet materials and other fields for ultra-high-purity rare earth products.

The invention provides modified zirconium boride ceramic, a preparation method and application of the modified zirconium boride ceramic in electrolytic aluminum, and belongs to the technical field of ceramic. The preparation method comprises the following steps: preparing zirconium dioxide sol, preparing a reinforcing phase, coating and sintering. The step of preparing the zirconium dioxide sol comprises the following steps: adding a rare earth solution into a zirconium source solution, controlling the adding rate of the rare earth solution to be 1.5-2.0 g / min, stirring while adding, stirring at 42-45 DEG C for 30-35 min, stirring at 60-63 DEG C for 40-50 min, adjusting the pH to 3.2-3.5, adding polyethylene glycol 2000 after aging, and stirring for 50-60 min to obtain the zirconium dioxide sol; the prepared modified zirconium boride ceramic is high in strength, excellent in high-temperature oxidation resistance and thermal shock resistance and good in corrosion resistance, and the stability of the electrolysis process can be effectively guaranteed.

The application belongs to the technical field of material detection, and specifically provides a method for determining the sodium expansion rate of an aluminum cathode with a non-standard size under pressure, characterized in that the method comprises the following steps: preparing a composite sample through an aluminum cathode carbon block and a graphite block, and preparing a control sample through the graphite block; electrolyzing the composite sample and the control sample respectively; determining a first length increment curve of the composite sample in an electrolysis process, and determining a second length increment curve of the control sample in the electrolysis process; and determining the sodium expansion rate of the aluminum cathode based on the first length increment curve and the second length increment curve. The technical scheme provided in the application can realize the determination of the sodium expansion rate of an aluminum cathode with a non-standard size.

The utility model belongs to the field of rare earth metal electrolytic machining, and particularly relates to an electrolytic furnace for preparing rare earth metal, which comprises a furnace body, a driving motor is arranged at the top of the furnace body, the output end of the driving motor penetrates through the furnace body and is connected with a reciprocating screw rod, and the reciprocating screw rod is arranged in a cylindrical cavity in the inner wall of the furnace body and is rotationally connected with the bottom of the cavity; a longitudinal sliding groove is formed in the surface of the barrel-shaped cavity, the surface of the reciprocating lead screw is in threaded connection with a barrel-shaped block matched with the barrel-shaped cavity, and a sliding block sliding in the sliding groove is arranged on the side face of the barrel-shaped block; through the structural design that an elastic scraping strip sleeving the outer wall of a fixing ring is in interference contact with the inner wall of the furnace body, the function of scraping residual materials on the inner wall in the electrolysis process in real time is achieved, and the problems that materials attached to the inner wall of a traditional electrolysis furnace cannot participate in the reaction and are difficult to clean are solved; the high-temperature-resistant silica gel material of the elastic scraping strip and the wave-shaped scraping teeth enhance the scraping effect, so that the materials are ensured to participate in the reaction again, and solidification residues are reduced.

The invention relates to the technical field of equipment control, in particular to a rare earth electrolysis feeding control method and system based on the fluorine ion quantity, and the method mainly comprises the steps that the fluorine gas concentration in the electrolysis process in the current collection period is obtained, and the current fluorine ion detection concentration is obtained through the fluorine gas concentration; and constructing a PID control model, and outputting a control signal for the feeding equipment according to the PID control model based on the fluorine ion concentration. According to the scheme, the fluorine ion or fluorine-containing gas emission amount is collected, the fluorine-containing gas or fluorine ion emission amount is relatively stable during normal electrolysis, and once material shortage and fluorine-containing gas or fluorine ion emission data are abnormal and obvious, abnormal electrolysis can be judged in time, response can be made in time (the starting point is different from that of the disclosed feeding control technology), and the feeding control accuracy is improved. And data are fed back in time and output of the charging machine is controlled. According to the method, whether material shortage exists in current electrolysis or not is judged, the feeding amount is accurately controlled through fluorine data, furnace caking caused by excessive material feeding due to the fact that materials exist in a furnace is avoided, and rare earth fluoride can be prevented from participating in electrolysis due to material shortage in the furnace.

The present invention belongs to the technical field of PET degradation and recycling, and particularly relates to a process, system and application for electrolytically recovering PTA from PET degradation liquid. The process flow includes constructing an electrolysis system, introducing the PET degradation clear liquid from the material clear liquid tank into the electrolysis system, and draining the PTA generated by electrolysis together with the PET degradation clear liquid to the material concentrated liquid tank. The PTA solid is separated from the aqueous solution containing terephthalate through a membrane filtration device. The PTA solid re-enters the material concentrated liquid tank for enrichment, and then is filtered, washed and dried to obtain PTA. The filtrate enters the material clear liquid tank for cyclic electrolysis; the inorganic alkali liquid generated by electrolysis enters the alkali liquid storage tank to collect the generated inorganic alkali. This process and system enable the PTA generated by electrolysis to continuously flow out of the anode chamber along with the PET degradation clear liquid, reducing the deposition of PTA on the surface of the anode plate, solving the problem that the PTA generated during electrolysis is likely to deposit on the surface of the anode plate and then cause the interruption of the electrolysis reaction, and significantly improving the electrolysis efficiency.

The application discloses a copper electrolysis / electricity deposition device and a working method thereof in the technical field of crude copper electrolytic refining, which comprises a tank body, the tank body comprises a cathode cavity and an anode cavity, the cathode cavity and the anode cavity are arranged side by side and are communicated with each other, an electrolyte input device, the electrolyte input device is arranged in the cathode cavity, and the electrolyte input direction is from the cathode to the anode, an electrolyte output device, the electrolyte output device is arranged in the anode cavity, and the electrolyte output direction is from the anode to the cathode, cathode plates and anode plates can be arranged in the cathode cavity and the anode cavity respectively at intervals, and the cathode plates and the anode plates are connected with an electrolysis power source externally, the cathode cavity and the anode cavity adopt a cathode-anode different-tank structure, the purity of electrolyte in the cathode tank is high during the electrolysis process, the quality of cathode copper can be improved, the problem of short circuit caused by excessive dissolution of the anode plates and falling off of the anode plates during the electrolysis process can be avoided, the residual anode rate can be reduced, and silver ions generated by anode dissolution do not participate in cathode discharge, so that the silver recovery rate can be improved.

The device comprises a pulse power supply, the negative electrode and the positive electrode of the pulse power supply are connected with a metal-based diamond composite material and a tool electrode respectively, the tool electrode or the metal-based diamond composite material is provided with an ultrasonic vibrator, and the ultrasonic vibrator is connected with the pulse power supply. And the ultrasonic vibrator is provided with an ultrasonic generator. According to the method, the distribution density of bubbles on the surface of the diamond is improved through the cathode surface hydrogen evolution process in the electrolysis process, controllable conditions are created for the ultrasonic cavitation effect, a tool electrode material is sputtered to the surface layer of the diamond due to electric spark discharge, a catalyst is provided, and the conversion efficiency of diamond graphitization is improved by integrating the two conditions. The surface layer of the diamond has electrical conductivity after being graphitized, so that the diamond has discharge machinability without the operation of plating metal and the like, and the implementation mode is simple.

The invention discloses an electrolyte containing ammonium hydrogen fluoride, which takes pure water as a solvent, and each liter of the electrolyte contains 6.1 to 10.3 g of ammonium hydrogen fluoride, 2.2 to 4.2 g of ammonium fluoride, 2.9 to 4.9 g of sodium fluoride and 0.22 to 0.42 g of 2, 5, 8, 11-tetramethyl-6-dodecyne-5, 8-diol; the method is used for treating the beryllium copper surface and comprises the following steps: (1) putting the electrolyte containing ammonium hydrogen fluoride into an electrolytic bath of electrolysis equipment; (2) putting a beryllium copper piece to be treated into the electrolyte in the step (1) as an anode, taking a stainless steel plate as a cathode, and electrolyzing under the action of direct current; (3) the beryllium copper piece subjected to electrolysis treatment is washed with pure water, and then the beryllium copper piece is placed in electroplating liquid for nickel plating; and (4) the beryllium copper piece subjected to nickel plating treatment is washed with pure water and dried to remove surface moisture, and the beryllium copper piece subjected to surface treatment is obtained. The method is safe and reliable to operate, clean and environment-friendly.

The utility model relates to water electrolysis technical field, specifically disclose a kind of low-temperature full gaseous water vapor electrolytic hydrogen production device and system. The utility model aims at overcoming the limitations of existing water electrolysis technology in energy efficiency, cost, system complexity, operation flexibility and environmental adaptability etc. The utility model is core at, under the mild condition lower than 90 DEG C, water is supplied to cathode and anode of electrolytic cell in the form of pure gaseous water vapor simultaneously, using specially designed membrane electrode assembly and internal water management structure, under the action of direct current, water vapor is decomposed efficiently to generate high-purity hydrogen and oxygen. The entire electrolysis process avoids the direct input and circulation of liquid water, realizes gas-solid two-phase interface reaction, significantly simplifies water balance system, reduces equipment volume and weight, solves the bubble coverage of traditional liquid phase electrolysis, mass transfer resistance. The utility model device has the characteristics of modularization and miniaturization, and significantly reduces the net power consumption per unit hydrogen production.

The invention discloses an electrolytic aluminum discharger function test device, and relates to the technical field of dischargers, the electrolytic aluminum discharger function test device comprises a material box, a discharging valve, a base support and a metering scale, the top of the material box is provided with a to-be-tested electrolytic aluminum discharger, the discharging valve is used for controlling the electrolytic aluminum discharger to discharge, and the base support is used for supporting the base support. The base support is arranged at the bottom of the material box and used for supporting the material box, and the metering scale is arranged at a discharging opening in the bottom of the material box and used for weighing the discharging amount of one-time discharging of the electrolytic aluminum discharging device; according to the device for testing the function of the electrolytic aluminum blanking device, blanking testing can be carried out after the blanking device is maintained, and whether the maintenance effect of the blanking device reaches the standard or not can be judged by comparing the blanking amount with the standard blanking amount. And if the blanking amount of the blanking device is greatly deviated from the standard blanking amount or the phenomenon of material leakage exists, the blanking device is taken down to be repaired again, so that the situation that the unqualified blanking device is mounted on the electrolytic bath to influence the electrolytic process index is avoided.

The application discloses a copper electrolysis additive adding system and a control method. The copper electrolysis additive adding system comprises an electrolytic cell, an additive dissolving device, a first transmission pipeline, a first metering pump and an electric control device, and an additive dissolving groove is formed in the additive dissolving device. One end of the first transmission pipeline is connected to the electrolytic cell, and the other end of the first transmission pipeline is connected to a liquid outlet of the additive dissolving device. The first metering pump is arranged in the first transmission pipeline. The electric control device is in communication connection with the first metering pump, so as to control the first metering pump to adjust the flow of the solution transported from the additive dissolving device to the electrolytic cell. According to the copper electrolysis additive adding system, the accurate control and the uniform and continuous addition of the additive solution are realized, and the stability of the electrolysis process and the quality and production efficiency of the electrolytic copper are improved.

The present invention relates to a method for preparing a structurally discontinuous air self-priming electrode with surface microcracks that resist electrowetting. A carbon black-polytetrafluoroethylene film prepared by coating forms a large number of irregular microcracks during the calcination process, thereby causing structural discontinuity. This structurally discontinuous air self-priming electrode can effectively avoid the electrowetting effect and the resulting electrolyte flooding during electrocatalytic service, maintain stable local water resistance and air self-diffusion channels, and achieve efficient and long-lasting electrochemical synthesis of H2O2. Due to the steric effect, the discontinuity of the electrode structure prevents electric field lines from reaching, resulting in a local low electric field region at the crack. This achieves the electrode's anti-electrowetting ability during long-cycle electrolysis, achieves stable hydrophobicity and rapid oxygen transmission channels under the electric field, and greatly improves the yield, current efficiency, and long-term stability of H2O2 electrosynthesis in air.

This invention discloses a method for extracting gallium from coal using rare metal extraction technology. Using dry fly ash with a gallium content of 50-80 μg / g as raw material, the method sequentially involves raw material pretreatment, roasting activation, acid leaching, leachate pre-purification, solvent extraction and back-extraction, deep refining, and electrolytic refining to achieve efficient gallium extraction and purification. The core of this method is the destruction of the aluminosilicate lattice through high-temperature roasting activation with soda ash, converting gallium into a soluble state. Impurities are then removed through three stages of deep purification, combined with an alkaline constant-current electrolytic process to prevent impurity co-deposition. This method realizes the resource utilization of low-grade fly ash solid waste, significantly improves the gallium leaching rate and resource recovery rate, and ultimately obtains industrial-grade gallium with high purity.

The invention discloses a method for synthesizing vanadium electrolyte through continuous electrolysis, which adopts a flow type electrolysis device as a reactor, and the device comprises at least one diaphragm electrolytic cell, two catholyte circulating tanks and at least one anolyte circulating tank; an acidic aqueous solution containing high-valence vanadium is used as an original catholyte, and an acidic aqueous solution is used as an original anolyte; the diaphragm electrolytic cell continuously operates to reduce the catholyte, and the continuous operation time is longer than or equal to 24 hours; after reduction, respectively discharging reduced catholyte from each catholyte circulating tank in batches; and adjusting the valence state of vanadium ions in the reduced catholyte by using an acidic aqueous solution containing high-valence vanadium to obtain the vanadium electrolyte. According to the invention, the electrolytic bath is used, and at least two cathode liquid circulating tanks are arranged, so that continuous electrolysis is realized by switching and using the two cathode circulating tanks in the electrolysis process, and the production capacity of the vanadium electrolyte can be improved by more than 30%.

A semiconductor package includes a lead having an exterior surface portion, at an exterior of the semiconductor package, and an encapsulated surface portion contacting an encapsulation material. A solderable metal layer is on the exterior surface portion. The lead has a higher surface roughness at the encapsulated surface portion than at the exterior surface portion. Before the solderable metal layer is formed, polymer material of the encapsulation material may extend onto the exterior surface portion. A first portion of the polymer material on the exterior surface portion is removed, exposing areas of the lead. Metal from the lead, where exposed by a remaining portion of the polymer material, is removed by an electrolytic process. The lead is biased to a positive potential with respect to an electrolytic solution. Subsequently, the remaining portion of the polymer material is removed. The solderable metal layer is formed on the exterior surface portion.

The utility model relates to the technical field of electrolysis devices, and provides an efficient flocculation electrolysis reaction device which comprises an electrolytic tank, an anode plate and a cathode plate are arranged in the electrolytic tank in a spaced mode, an oxygen collector covering the anode plate and a hydrogen collector covering the cathode plate are arranged in the electrolytic tank, and the electrolytic tank is connected with a heater. The heater is connected with a water inlet pipe, the oxygen collector and the hydrogen collector are respectively connected with an oxygen storage tank and a hydrogen storage tank through a first exhaust pipeline and a second exhaust pipeline, and the hydrogen storage tank and the oxygen storage tank are both connected with the heater. By arranging the oxygen collector and the hydrogen collector, oxygen and hydrogen generated in the electrolysis process are collected and serve as fuel of the heater to heat sewage, energy is saved, the cost is reduced, meanwhile, the viscosity of the heated sewage is effectively reduced, molecular thermal motion is improved, the removal rate of heavy metal, SS, colloid and COD is increased, and the service life of the sewage is prolonged. And the electric flocculation treatment efficiency can be improved.

The application provides a drawer module and a refrigerator. The drawer module comprises a drawer barrel, a drawer body and an oxygen reduction structure. The oxygen reduction structure comprises an outer shell, a cathode plate and an anode plate. The outer shell is arranged in the drawer barrel and is used for accommodating electrolyte at least. The cathode plate and the anode plate are both in contact with the electrolyte. The cathode plate and the anode plate are arranged in parallel and oppositely along the horizontal direction. The first surface of the cathode plate faces the anode plate, and the second surface of the cathode plate faces the accommodating cavity. The cathode plate and the anode plate are arranged in parallel and oppositely along the horizontal direction, that is, the distance between the cathode plate and the anode plate is uniform, which can greatly increase the effective reaction area between the cathode plate and the anode plate and improve the efficiency of the electrochemical reaction. The above arrangement can ensure the uniform distribution of the current density, that is, the electric field, reduce the uneven corrosion in the electrolysis process, improve the electrolysis efficiency, optimize the ion transmission path and thus improve the oxygen reduction efficiency.

The present invention discloses a method for preparing nano-MgO for paper deacidification, characterized by comprising the following steps: using a magnesium alloy sheet as an anode and graphite as a cathode material, adding a surfactant as a dispersant to a sodium chloride aqueous solution, electrolyzing to prepare a Mg(OH)2 precursor, and then calcining and thermally decomposing it to prepare nano-sized MgO particles. This method has a simple preparation process, and the surfactant is directly added during the electrolysis process, which reduces the preparation process, resulting in low cost, good uniformity, and energy conservation. The prepared nano-MgO material has a moderate particle size and can be well dispersed in an organic fluorocarbon solvent, providing sufficient contact surface area for the paper. As a paper deacidification nanoparticle, it has better dispersibility in the solution and can be more evenly dispersed in the paper, achieving a good deacidification effect.

The utility model relates to a water electrolysis device and a water electrolysis system, and the water electrolysis device comprises a first tank body which is internally provided with an electrode for electrolyzing a target medium; the second tank body is erected above the first tank body; the two groups of pipeline assemblies are used for communicating the first tank body with the second tank body; and the heat exchange device acts on at least one group of pipeline components, so that temperature difference is obtained between the two groups of pipeline components, and fluid circulation is formed between the first tank body and the second tank body. According to the technical scheme, the substance conveying path in the electrolysis process is effectively improved, particularly fluid circulation between the first tank body and the second tank body is effectively improved, stable proceeding of the electrolysis process is guaranteed, and the production efficiency and safety are improved.

The application discloses an electro-catalysis-plasma coupling device for recovering elemental nickel from chemical nickel waste liquid and relates to the technical field of wastewater treatment. The device comprises a movable box body, an electrolysis unit and a plasma treatment unit arranged in the movable box body. The device integrates electrolysis, plasma, temperature control and circulation in the movable box body, has a compact structure, is convenient to transport and deploy on site, and is suitable for various scenes such as laboratories, electroplating workshops and wastewater treatment stations. A heating device is arranged in the electrolytic tank to heat and maintain the electrolyte in a target temperature range. A plasma generator is arranged to perform plasma quenching treatment on the electrolyte during electrolysis, significantly improve the concentration of free nickel ions in the electrolyte, improve the electrodeposition effect, and control the wastewater to quickly reach the electrolysis water level through the overflow port, the stainless steel rod, the magnetic pump, the check valve and the distribution box. The discharged electrolyte can be sent back to the electrolytic tank for re-electrodeposition by changing the placement of the water inlet pipe, thereby improving the recovery amount of nickel.

Electrodes for electrolytic processes, particularly anodes suitable for oxygen evolution in industrial electrolytic processes, and methods for producing them. More specifically, MMO-coated titanium anodes for electrochemical reactions used in oxygen evolution reactions (OER) in various applications such as electrolytic extraction, electroplating, electrogalvanizing, and electrolytic copper foil manufacturing, as well as methods for producing anodes.