12 results about "Cathodic reaction" patented technology

The utility model discloses a device for treating wastewater containing hexavalent chromium ions, which comprises an anode reaction zone, a cathode reaction zone, a buffer zone, an electrocoagulation reaction zone and an inclined tube settling zone which are communicated in sequence, a suspended partition plate is arranged between the anode reaction zone and the cathode reaction zone, a graphite plate array is arranged in the anode reaction zone, and the graphite plate array is arranged in the inclined tube settling zone. A porous carbon material is arranged in the cathode reaction zone, the cathode reaction zone is communicated with the buffer zone, the buffer zone is communicated with the electrocoagulation reaction zone, an iron pole plate array is suspended in the electrocoagulation reaction zone, the electrocoagulation reaction zone is communicated with the inclined tube settling zone, and the inclined tube settling zone is communicated with the inclined tube settling zone. And an inclined tube is suspended in the inclined tube settling region. According to the utility model, hexavalent chromium ions in water can be removed by only using electricity and a small amount of iron element, reducing agent chemicals and acid and alkali agents used for treating hexavalent chromium in the traditional process are greatly reduced, and the salt content of effluent is far lower than that of the traditional treatment process.

The invention belongs to the technical field of zirconium hydroxide production, and particularly discloses a continuous production process of nano zirconium hydroxide. According to the continuous production process, the zirconium-containing aqueous solution obtained after zirconium and hafnium separation is used as a raw material, and the chlorine salt aqueous solution which is simple in component and low in price is used as an auxiliary material. By limiting the current density and the electrolysis temperature, production is stable and easy to control; the ion diffusion speed of the whole electrolysis system is stable, the electrolysis efficiency is high, and it is guaranteed that the obtained zirconium hydroxide is nano-particles with the narrow particle size range, and the quality is stable; the obtained cathode reaction slurry is high-purity zirconium hydroxide slurry, a corresponding product can be obtained only through solid-liquid separation without drying treatment, and a complex impurity removal post-treatment process is not needed; by controlling electrolysis ending conditions, the product yield is up to 99.5% or above, the content of anion impurities in the product is smaller than 1000 ppm, and particles are fine and uniform and high in quality. The method is simple in process, low in raw material cost, easy in product post-treatment and small in environmental pollution, and is a green synthesis method for synthesizing nano zirconium hydroxide.

The utility model relates to three-stage chamber salt acid-alkali treatment equipment based on electrochemical reaction, which comprises a plurality of three-stage chamber electrochemical reaction units which are communicated with one another, and each three-stage chamber electrochemical reaction unit is provided with three independent chambers which are separated by an electrolytic diaphragm, the three independent chambers comprise an anode reaction chamber, a desalting chamber and a cathode reaction chamber which are sequentially arranged, an anode bar is arranged in the anode reaction chamber, and a cathode bar is arranged in the cathode reaction chamber; water inlets are formed in the side walls of the lower parts of the anode reaction chamber, the desalination chamber and the cathode reaction chamber, water outlets are formed in the side walls of the upper parts of the anode reaction chamber, the desalination chamber and the cathode reaction chamber, and the desalination chamber water inlet is used for allowing salt-containing wastewater to enter and be discharged through the desalination chamber water outlet after the salt-containing wastewater is subjected to desalination treatment in the desalination chamber; the water outlet of the anode chamber is communicated with a strong acid liquid box, and the water outlet of the cathode chamber is communicated with an alkali liquor settling box. The method has the effects of realizing resourceful treatment of the salt-containing wastewater, improving the water treatment efficiency of the salt-containing wastewater and reducing the water treatment cost.

This invention relates to an iron-iron-phosphorus 3-point electrocatalyst with an asymmetric electronic structure and its application. The catalyst preparation method is as follows: zinc salt and iron salt are uniformly dispersed in a mixed solution of N,N-dimethylformamide and methanol, and 2-methylimidazole is added and uniformly dispersed in the same mixed solution to obtain a pale yellow powder. The pale yellow powder is uniformly dispersed in a methanol solution, and tannic acid solution is added and stirred to obtain a gray-green powder Fe@ZIF-8. Fe@ZIF-8 and p-phenylenediamine are dispersed in a tetrahydrofuran solution, and a phosphorus source and triethylamine are added to obtain polymer-coated Fe@ZIF-8. Fe@ZIF-8 is calcined to obtain a phosphorus-doped iron single-atom catalyst. The phosphorus-doped iron single-atom catalyst is ball-milled with iron salt and phthalocyanine to obtain an iron-iron-phosphorus 3-point electrocatalyst with an asymmetric electronic structure. This catalyst is applied to the air cathode reaction of a zinc-air battery.

The application discloses a device for treating high-salt organic wastewater by using a bipolar membrane electrodialysis, which comprises a membrane stack, a direct-current power supply and a circulating pipeline system. The membrane stack is provided with one anode plate and one cathode plate on two sides respectively, and is assembled by a bipolar membrane, a cation exchange membrane and an anion exchange membrane. The inside of the membrane stack is composed of an anode reaction compartment, an acid liquid compartment, a feed liquid desalination compartment, an alkali liquid compartment and a cathode reaction compartment. The bipolar membrane, the acid liquid compartment, the anion exchange membrane, the feed liquid desalination compartment, the cation exchange membrane and the alkali liquid compartment can form one or more repeating units in sequence. The feed liquid circulating pipeline is communicated with the anode reaction compartment, the feed liquid desalination compartment and the cathode reaction compartment respectively, the acid liquid circulating pipeline is communicated with the acid liquid compartment, and the alkali liquid circulating pipeline is communicated with the alkali liquid compartment. The device has a simplified structure and a low operation cost, can realize desalination, organic pollutant degradation and acid-alkali recovery simultaneously, and is especially suitable for treating medium and low COD high-salt organic wastewater.

The invention discloses rGO-epoxy resin anticorrosive paint with different conductivity and a preparation method thereof, and belongs to the technical field of anticorrosive coating preparation. The conductivity of graphene is reduced by controlling the reduction condition, the electron transmission efficiency can be reduced, so that the activity of a corrosion battery is weakened, after the rGO160 with the conductivity of 1.51 S / cm is added to the epoxy coating, the rGO160 graphene serves as an electron channel, electrons generated by metal corrosion are transmitted to the surface of the coating, and the corrosion resistance of the corrosion battery is improved. The cathode reaction occurs on the surface of the coating and the surface of the non-metal substrate, so that the electrochemical corrosion speed is reduced. By regulating and controlling the conductivity of the reduced graphene oxide, the shielding performance and the corrosion inhibition capability of the reduced graphene oxide can be effectively balanced, so that the optimization of the corrosion resistance of the coating is realized.

The utility model relates to hydrogen peroxide generation module technical field, specifically a kind of hydrogen peroxide generation module and oral irrigator, including shell, liquid inlet, liquid outlet, shell is equipped with electrolyte chamber, cathode reaction component, anode reaction component and spoiler assembly, cathode reaction component is used to generate hydrogen peroxide, spoiler assembly is connected between cathode reaction component and anode reaction component.The utility model is through setting hydrogen peroxide generation module, user only needs to inject suitable liquid from liquid inlet into electrolyte chamber, need not extra preparation separate hydrogen peroxide solution, can generate hydrogen peroxide solution in cathode reaction component instantaneously, avoid the situation that concentration change, sterilization effect is worse due to long-time storage, ensure that the expected sterilization and disinfection efficacy can be reached, the utility model is set through spoiler assembly, so that electrolyte flows fully between cathode reaction component and anode reaction component Reaction, improve the controllability of hydrogen peroxide generation efficiency.

The invention provides a protective coating for containers and engineering equipment and primer for industrial metal surfaces. The protective coating for the engineering equipment is characterized by comprising a bottom layer, a middle layer and a surface layer which are arranged in sequence, the bottom layer is attached to engineering equipment, the bottom layer is made of primer containing 0.1-20% of zinc by mass, the middle layer is made of epoxy powder, and the surface layer is made of epoxy powder or polyester powder. The invention breaks the tradition of adopting zinc-rich primer at present, creatively reduces the zinc content in the primer, reduces the corrosion expansion phenomenon, inhibits the cathodic reaction, and improves the anti-corrosion capability of the coating.

The application belongs to the technical field of fuel cells, and particularly relates to a proton exchange membrane fuel cell, a cathode topological optimization flow field structure and a construction method. The cathode topological optimization flow field structure comprises a cathode flow field plate and a cathode topological optimization flow field arranged on the cathode flow field plate. The cathode topological optimization flow field comprises a cathode gas inlet, a cathode gas outlet and a continuous flow channel structure connecting the cathode gas inlet and the cathode gas outlet. The continuous flow channel structure is obtained by a topological optimization method and is irregularly branched and net-shaped in the effective reaction area, so that the cathode reaction gas can enter the flow field inside along different hydraulic paths and be distributed to the corresponding areas of the gas diffusion layer and the catalyst layer. The application can improve the uniformity of the distribution of the cathode reaction gas in the effective reaction area, relieve the problems of insufficient oxygen supply and oxygen depletion in the downstream, promote the reaction generated water to be discharged from the flow channel, reduce the risk of local waterlogging, and improve the output performance and the operation stability of the proton exchange membrane fuel cell.

The utility model relates to the technical field of electrochemical generation devices, in particular to a hydrogen peroxide module based on critical surface electrochemical reaction and a hydrogen peroxide generator, which are characterized in that a cathode assembly is arranged, and one side of the cathode assembly is in contact with air to form a gas-solid critical surface, so that oxygen in the air can be utilized in cathode reaction; compared with a traditional process which is limited by dissolved oxygen in water, sufficient and continuous oxygen sources can be provided for the cathode reaction, and the other side of the cathode assembly is in contact with the electrolyte to form a solid-liquid critical surface, so that the reaction can be continuously carried out, and the reaction efficiency is improved. Therefore, the efficiency and equilibrium concentration of an electrochemical synthesis product are improved, and the problems that in an existing hydrogen peroxide preparation process, propulsion of a cathode reaction depends on consumption of dissolved oxygen, however, due to the fact that the content of the dissolved oxygen in water has an upper limit, the efficiency of the electrochemical synthesis product is difficult to improve in the reaction process, and the reaction time is shortened are effectively solved. And the equilibrium concentration of the product is also limited.

The invention discloses an electrolytic hydrogen production system. The electrolytic hydrogen production system comprises an ALK electrolysis assembly and an AEM electrolysis assembly. The ALK electrolysis assembly comprises an ALK anode reaction zone, an ALK cathode reaction zone, an ALK anode gas-liquid separation tank and an ALK cathode gas-liquid separation tank; the ALK anode reaction zone is communicated with the ALK anode gas-liquid separation tank, and the ALK cathode reaction zone is communicated with the ALK cathode gas-liquid separation tank; the AEM electrolysis assembly comprises an AEM anode reaction zone and an AEM anode gas-liquid separation tank; and the AEM anode reaction zone is communicated with the AEM anode gas-liquid separation tank. According to the technical scheme, the circulating alkali liquor in the ALK electrolytic cell and the circulating alkali liquor in the AEM electrolytic cell can complement each other, so that electrolyte concentration unbalance is avoided, the hydrogen production efficiency is improved, and the operation stability of an electrolytic hydrogen production system is guaranteed.