186 results about "Sodium chlorate" patented technology

The invention belongs to the technical field of sodium hypochlorite production, and particularly relates to a method for producing sodium hypochlorite. A method for producing sodium hypochlorite comprises the following steps: adding a compound additive into a sodium hydroxide aqueous solution, and uniformly stirring to obtain a compound alkali-containing raw material solution; respectively introducing the composite alkali-containing raw material solution and chlorine into the micro-channel reactor through a metering pump, and controlling reaction conditions to generate a reaction solution containing sodium hypochlorite; introducing the reaction liquid into a ceramic membrane separation device, separating and removing unreacted solid impurities and by-product salts, and collecting permeate; unreacted sodium hydroxide is recycled and reused; and detecting the permeate liquid to be qualified to obtain a sodium hypochlorite finished product. According to the invention, four key links of compound additive addition, microchannel reaction, ceramic membrane separation and resin recovery are organically linked to form a systematic solution. Aiming at the core pain points of insufficient reaction, more byproducts, raw material waste, equipment corrosion and the like in the traditional process, the product purity is improved through the synergistic effect of all links.

The invention relates to a chlorine dioxide sustained-release ball, which relates to the technical field of environmental protection and disinfection, and comprises an activated alumina ball and an inorganic porous layer from inside to outside, wherein the activated aluminum oxide ball is loaded with sodium chlorite and a porous film, and the inorganic porous layer is loaded with the porous film. The chlorine dioxide sustained-release ball disclosed by the invention realizes the goals of high load, long period, constant-speed release and stable physical form.

The described invention is a disinfectant that has a bactericidal and fungicidal effect. Optimally, the agent is diluted more than 70 times before use, thereby achieving pH neutrality of the solution. The agent is also effective, bactericidal and fungicidal, and when diluting the final formulation up to 200 times. The improvement of the disinfectant is based on the presence of the active substance didecyldimethylammonium chloride. The agent also contains sodium chlorite. In this invention, polyethylene glycol, in addition to the function of a polymer carrier, also has the function of a stabilizer of the solution of the active substance, a non-ionic surfactant.

This invention relates to the field of automatic control technology, specifically to a method for stabilizing and controlling the effective chlorine content of sodium hypochlorite solution. During the cooling stage of the sodium hypochlorite solution, an online electrochemical sensor acquires the concentration signal of free trace metal ions in the solution. When the signal reaches a preset threshold of the controller, the controller instructs a peristaltic pump to add a compound stabilizer to the solution. The compound stabilizer is prepared by mixing a specific short peptide containing cysteine ​​and histidine with a silicate buffer solution. After adding the compound stabilizer, the solution undergoes short-term ultrasonic cavitation treatment. This method uses a specific short peptide instead of traditional aminopolycarboxylate salts, avoiding the breaking and failure of carbon-nitrogen bonds under strong oxidizing conditions, preventing secondary release of metal ions that could trigger catalytic decomposition, extending the effective chlorine half-life, and reducing the amount of chlorate byproducts generated.

The invention relates to the technical field of rare earth secondary resource recovery, in particular to a neodymium iron boron waste recovery method. The method comprises the following steps: firstly, grinding the neodymium iron boron waste into fine granularity, and spraying into a specially designed flash reaction furnace body through a nozzle by virtue of carrier gas; meanwhile, sodium chlorate powder is continuously added into a pyrolysis area in the furnace, so that the sodium chlorate powder is instantly decomposed at a certain temperature, and high-activity gas is generated; the sprayed waste particles are in a suspended state in the reaction tower and are subjected to instantaneous gas-solid reaction with high-temperature active gas, rare earth elements are quickly oxidized and chlorinated and are converted into soluble rare earth oxychloride, and iron is mainly converted into FeO which is easy to magnetically separate. And carrying out cyclone dust collection and quenching on the reacted material to obtain a roasted product, recovering rare earth through water leaching, and recovering iron through magnetic separation. According to the invention, selective oxidation is completed at low temperature in a short time (second level), and the method has the outstanding advantages of high efficiency, low energy consumption and high recovery rate.

The application discloses a cultivation method for improving selenium content of Auricularia auricula, and comprises a cultivation material for improving selenium content of Auricularia auricula, wherein the cultivation material is obtained by mixing a slow-release sodium chlorate composite material and a slow-release selenium-containing mineral material with carbon nutrition, nitrogen nutrition and mineral nutrition respectively. In the application, the sodium chlorate and selenium are respectively prepared into specific slow-release systems, and the slow-release reaction in the cultivation material generates selenite which is easy to be absorbed and utilized by Auricularia auricula, so that the selenite concentration in the cultivation material is regulated, the growth of Auricularia auricula is promoted, the yield of Auricularia auricula is improved, the quality of Auricularia auricula is significantly improved, the selenium content and the amino acid content of Auricularia auricula are both significantly increased, and the cultivation material can be used for seedling cultivation of Auricularia auricula with high selenium content, so as to obtain high-quality seedlings of Auricularia auricula with high selenium content.

The invention belongs to the technical field of sodium hypochlorite preparation, and provides a hydrogen-free sodium hypochlorite preparation system and a sodium hypochlorite preparation technology.The sodium hypochlorite preparation system comprises a brine electrolysis device, and a liquid inlet of the brine electrolysis device communicates with a pipeline mixer through an electrolyte conveying pipeline; a liquid inlet of the pipeline mixer is respectively communicated with a saturated salt water preparation device and a saturated salt water dilution device, a liquid outlet of the salt water electrolysis device is communicated with a sodium hypochlorite storage tank through a sodium hypochlorite conveying pipeline, and a liquid outlet of the sodium hypochlorite storage tank is communicated with a metering and adding device; the brine electrolysis device comprises an air cathode electrolytic cell and a rectification power supply, the air cathode electrolytic cell comprises a cell body, the cell body is provided with a containing cavity for containing electrolyte, and an anode and a cathode which are electrically connected with the rectification power supply are fixedly installed on the cell body. According to the method, the sodium hypochlorite solution is prepared efficiently and safely, no hydrogen is generated in the electrolysis process, the operation safety is remarkably improved, and the method is safer and more environmentally friendly.

[Problem] Provided are: a method for producing a regenerated cellulose-derived cellulose dispersion or a regenerated cellulose-derived cellulose molded body capable of suppressing swelling in alkali and deterioration of whiteness over time; regenerated cellulose-derived cellulose beads; and a cosmetic material. [Solution] This method comprises: a pulverization step in which a regenerated cellulose is used as a dispersion raw material and the dispersion raw material is pulverized; a depolymerization step in which sodium hypochlorite is added to the pulverized raw material obtained in the pulverization step to reduce a degree of polymerization of the pulverized raw material; a pH adjustment step in which a pH-adjusted cellulose is obtained through a first pH adjustment operation for adjusting the pH of the depolymerized cellulose obtained in the depolymerization step to an alkaline pH of at least 9, a second pH adjustment operation for adjusting the pH of the depolymerized cellulose to an acidic pH of at most 6, and a neutralization operation for neutralizing the depolymerized cellulose; a washing step in which the pH-adjusted cellulose is washed; and a micronization step in which the pH-adjusted cellulose after the washing step is micronized to obtain a cellulose dispersion.

The invention relates to the technical field of brine sewage treatment, and discloses an inferior brine refining preparation method based on oxidation-adsorption coupling, which comprises the following steps: adding an efficient CuO / Al2O3 catalyst according to 0.5-1.5% of the volume of brine under the accurate control of the pH value of 2.5-3.0, and adding sodium chlorite according to the molar ratio of 3: 1-5: 1 to realize the specific deep oxidation of I <->; and carrying out targeted enrichment on the generated I2 by using a high-capacity adsorbent. According to the combined process, the iodine concentration of effluent is stably lower than 0.1 mg / L, and the catalyst can be recycled for more than or equal to 50 times. Comparison data proves that the iodine residue is up to 0.85 mg / L when no catalyst exists, and iodine removal is not thorough due to the fact that the oxidizing agent is insufficient. According to the efficient iodine removal method, the deposition of iodine in the ionic membrane electrolytic bath is fundamentally avoided, the expensive ionic membrane is effectively protected, the service life of the ionic membrane is prolonged by more than 30%, the energy consumption of the system is reduced by about 15%, and the brine recycling efficiency and the economic benefit are remarkably improved.

The invention belongs to the technical field of sterilization and disinfection materials, and particularly relates to a wrapped slow-release chlorine composition and a preparation method and application thereof.The composition is of a unique dual-wrapping structure, the core is a mixture of sodium chlorite and a stabilizer, the composition is primarily wrapped with hydrophobic modified chitosan microspheres and then combined with citric acid, and the wrapped slow-release chlorine composition is prepared. And finally, the metal coordinated polyethylene glycol hydrogel is used for outer layer coating to form a complete slow-release system. The preparation method comprises the following steps: firstly, preparing a microsphere carrier through hydrophobic modification and cross-linking curing of chitosan and lauric aldehyde; then, polyethylene glycol amine and a derivative of pyridinedicarbonyl chloride are subjected to cobalt ion coordination to form hydrogel; finally, the chlorine source components are combined and formed through adsorption, mixing and coating processes in sequence. The composition can effectively control the release rate of the chlorine component, has long-acting and stable sterilization and disinfection effects, and can be widely applied to the fields of water treatment, food preservation, medical instrument disinfection, agricultural disease control and the like.

The invention discloses a preparation method of light-permeable phase-change bamboo wood, and relates to the technical field of bamboo wood treatment. Lignin in alkali-treated bamboo wood is removed by adopting an acidic sodium chlorite system; according to an acidic sodium chlorite method, lignin is selectively removed while the complete structure of the bamboo fibers is kept, the preparation method is simple in process step, the used acidic sodium chlorite delignification system is combined with structural alkali treatment and vacuum impregnation, efficient delignification and high loading of the phase-change material are achieved, and meanwhile the phase-change effect is improved. The process operability and the final performance of the material are both considered, the prepared phase change bamboo material has light transmittance and a high enthalpy value, the phase change enthalpy is larger than 80 J / g, and the phase change bamboo material can be used as a light-transmitting window with a heat storage function, an indoor partition, a decoration panel and a photo-thermal management furniture assembly.

The present application belongs to the field of environmental functional materials and water treatment technology, and aims to provide a preparation method of ceramic membrane based on endogenous pore forming and catalysis of sludge containing algae. The method comprises the following steps: taking dewatered sludge of water supply plant in algae outbreak period of water source, drying, ball milling and sieving to obtain sludge powder; soaking and washing after using organic acid with complexing ability as heavy metal removal agent, pre-carbonization treatment, dry pressing into embryo, sintering into membrane sheet; primary activation treatment in weak oxidizing strong acid, washing and heating treatment for secondary activation to obtain ultrafiltration ceramic membrane product. The method is simple in operation steps, easy to implement and green and environmental protection; the prepared ceramic membrane has good separation performance and high mechanical strength, can catalyze oxidizing agent commonly used in water treatment while filtering, and free radicals are generated by decomposition to degrade organic matter; or catalyze common cleaning agent sodium hypochlorite during membrane cleaning to generate free radicals to strengthen the cleaning effect.

The application discloses a preparation method of a deodorant product, and comprises the following steps: step one, preparing a cross-linked hydroxypropyl methyl cellulose and chitosan water solution: hydroxypropyl methyl cellulose and chitosan are dispersed in water in a mass ratio of 1:1 to form a uniform and stable water dispersion a; peracetic acid and a copper ion catalyst are added to the water solution a, and the water solution a is heated and treated at 80-100 DEG C for 3-5 hours to obtain a water solution b; glucose is added to the water solution b to remove excess peracetic acid, and the water solution b is heated and treated for 1 hour again; and the cross-linked hydroxypropyl methyl cellulose and chitosan water solution is obtained after cooling; step two, preparing a stable hydrogen peroxide solution: urea is added to a hydrogen peroxide solution, and the solution is stirred at 40-50 DEG C for 1 hour; cyclodextrin is added to the above solution, and the solution is continuously stirred at 40-50 DEG C for 1 hour; and the stable hydrogen peroxide solution is obtained after cooling to room temperature; and step three, preparing the deodorant product: the cross-linked hydroxypropyl methyl cellulose and chitosan water solution obtained in step one and the stable hydrogen peroxide solution obtained in step two are mixed in a ratio of 1:5 to 1:1, and sodium chlorite is added, so that the deodorant product is obtained after stirring.

The invention discloses a preparation process of 2-chloro-4-(methylsulfonyl)-3-methyl benzoic acid, and relates to the technical field of preparation of inorganic compounds. The invention relates to a preparation process of 2-chloro-4-(methylsulfonyl)-3-methyl benzoic acid, which comprises the following steps: reacting 3-chloro-2-methylaniline with hydrochloric acid and sodium methyl mercaptide to form an intermediate C1, reacting with acetyl chloride, catalyzing with anhydrous aluminum trichloride to form an intermediate C2, reacting with hydrogen peroxide and sodium hypochlorite to form an intermediate C4, and reacting with sodium chloride to form the 2-chloro-4-(methylsulfonyl)-3-methyl benzoic acid. The 2-chloro-4-(methylsulfonyl)-3-methyl benzoic acid is obtained after the reaction is completed.

The invention relates to the technical field of solid waste treatment and resource utilization, in particular to an environment-friendly curing agent, sludge solidified soil and a preparation method of the sludge solidified soil. The environment-friendly curing agent is prepared from the following components: desulfurized fly ash, mineral powder, cement, sodium hypochlorite and polyferric sulfate. The sludge solidified soil is prepared from the following components: sludge, an environment-friendly curing agent and water. The environment-friendly curing agent prepared by adopting the technical scheme is used for curing water-containing sludge, the 28-day strength of a cured body of obtained sludge cured soil exceeds 2MPa, and the anti-permeability coefficient can reach 5.2 * 10 <-9 > cm / s. According to the technical scheme, the obtained sludge solidified soil is good in shrinkage resistance and water stability; the setting time is short, the strength development is fast, and the strength period is long; the anti-permeability is high, and the durability is good; according to the technical scheme, the environment-friendly curing agent replaces cement cementing materials to a large extent, and the economical efficiency is good.

The utility model relates to the technical field of caustic soda production process devices, in particular to a system for producing caustic soda, which comprises a crude salt preparation unit, a primary brine preparation unit, a secondary refined brine preparation unit, an electrolysis unit, an evaporation unit, a brine preparation unit, a chlorine hydrogen treatment unit and a hydrochloric acid synthesis unit, the caustic soda solutions with different mass concentrations are obtained on the same production line, the solid flaky caustic soda is obtained at the same time, and byproducts such as chlorine, hydrogen, hydrochloric acid, sodium hypochlorite and mirabilite with recycling value are obtained; according to the utility model, the salt dissolving water preparation unit is reasonably and orderly communicated with the other units, and materials such as waste water generated by each unit are recycled, so that the purposes of energy conservation and efficiency improvement are achieved.

The utility model relates to the technical field of chlorine dioxide generation, and discloses a protective chlorine dioxide generator which comprises a generator body, metering pumps are installed on the two sides of the generator body, and a sodium chlorate storage tank is installed on one side of the metering pump on the left side of the generator body. A hydrochloric acid storage tank is mounted on one side of the metering pump on the right side of the generator main body, and guide grooves are formed in the exteriors of guide rods and are formed in the two sides of the front end and the rear end in the generator main body. According to the utility model, the components such as the rubber protection plate, the spring, the guide rod and the guide groove are arranged, and when the generator main body is used, a protection structure formed by the components is additionally arranged at the front end and the rear end of the generator main body, so that the generator main body has a certain protection property; when external impact force is encountered, the protection structure formed by the components can reduce the external impact force to protect the generator main body.

The invention relates to the technical field of energy chemical industry, water treatment and hydrogen energy comprehensive utilization, and provides a sodium hypochlorite generator and fuel cell coupled operation system and operation method. The air supply system comprises an air supply module and a hydrogen supply module; an anode of the fuel cell stack is connected with the hydrogen supply module and a byproduct hydrogen outlet of the sodium hypochlorite generation system; and the cooling module is used for cooling the fuel cell stack through cooling medium circulation and providing heat for seawater entering the sodium hypochlorite generation system. According to the arrangement, through deep complementation and coupling utilization of efficient electric energy and heat energy characteristics of the fuel cell, low-temperature heating requirements of the sodium hypochlorite generating device and byproduct gaseous resources, the problem of electrochemical preparation of sodium hypochlorite in coastal areas in winter in northern areas is solved, and nearby consumption of coastal green hydrogen energy is promoted; the overall energy utilization efficiency of the system is improved, the operation cost is reduced, and energy conservation and emission reduction of the coastal industrial process are promoted.

According to the sodium chlorate solution filter provided by the utility model, the structure of the sodium chlorate solution filter is improved, so that the filtering effect and the filtering efficiency of the sodium chlorate solution filter are improved. The sodium chlorate solution filter comprises a shell, a solution inlet pipe, a solution outlet pipe and a plurality of filter sticks, wherein the solution inlet pipe and the solution outlet pipe are communicated with the shell, the filter sticks are arranged in the shell, each filter stick comprises a supporting cylinder with an inner cavity, a plurality of liquid inlet holes are formed in the cylinder wall of each supporting cylinder, and the filter screens cover the liquid inlet holes; and the inner cavity of the supporting cylinder is directly or indirectly communicated with the solution outlet pipe. By the adoption of the sodium chlorate solution filter, the temperature resistance of the sodium chlorate solution filter can be remarkably improved, and the filtering effect and efficiency of the filter are improved.

The invention discloses a method for flotation separation of galena and sphalerite, and belongs to the technical field of mineral flotation. The method comprises the steps that sodium hypochlorite and manganese sulfate are added into lead-zinc bulk concentrate pulp for an oxidation reaction, filtering is conducted after the reaction, polyvinyl alcohol is added into filter residues for continuous reaction, and treated pulp is obtained; and then a collecting agent and a foaming agent are added, and efficient separation of galena and sphalerite is achieved through the flotation process of one-time roughing, three-time refining and two-time sweeping. Sodium hypochlorite and manganese sulfate have a synergistic effect in ore pulp, a hydrophilic oxide layer and an inorganic film are formed on the surface of the sphalerite, and polyvinyl alcohol further forms a compact organic adsorption layer through hydrogen bonds, so that inhibition on the sphalerite is enhanced. The method can effectively inhibit sphalerite and improve lead-zinc separation selectivity and efficiency, and is especially suitable for separation of complex lead-zinc ore.

The invention belongs to the technical field of copper complex wastewater treatment, and discloses a method for removing a copper complex in wastewater and recycling copper-based sludge based on heat / CuO concerted catalysis of sodium hypochlorite. The method comprises the following steps: dispersing CuO particles into copper complex wastewater, stirring, heating, adding sodium hypochlorite, carrying out complex breaking reaction on the copper complex wastewater, and after the reaction is finished, carrying out solid-liquid separation by filtering to obtain treated wastewater and copper-based precipitate; the obtained copper-based precipitate can be used as a catalyst of a heat / CuO concerted catalysis sodium hypochlorite oxidation system, and copper complex wastewater is treated again, so that the copper-based precipitate is recycled.

The utility model relates to the field of sodium hypochlorite generators, and discloses an improved sodium hypochlorite generator which comprises a shell, a stirring assembly is arranged in the middle of the shell, a positioning assembly is arranged on the lower portion of the shell, wheels are fixedly connected to the four corners of the bottom face of the shell, and the stirring assembly comprises a first motor. The output end of the first motor is fixedly connected with a rotating rod, a connecting cylinder is arranged outside the rotating rod, a control cylinder is arranged outside the connecting cylinder, the bottom of the connecting cylinder is fixedly connected with a stirring rod, and the stirring rod penetrates through the shell and is movably connected with the shell. According to the water and salt mixing device disclosed by the utility model, through mutual cooperation of the first motor rotating rod, the connecting cylinder, the control cylinder, the stirring rod, the stirring head and other parts, the device can mix water and salt more uniformly and fully, the mixing efficiency is effectively improved, and meanwhile, only one motor is needed, so that the water and salt mixing device is more energy-saving and more practical.

The utility model discloses a collision type cross-flow jet sodium hypochlorite adding and mixing device which comprises a water passing pipeline, the water passing pipeline is provided with a jet water taking opening and at least two liquid-medicine mixed liquid inlets, the number of the liquid-medicine mixed liquid inlets is at least two, the two liquid-medicine mixed liquid inlets are oppositely arranged, and the jet water taking opening is communicated with the jet water taking opening. Each liquid medicine mixed liquid inlet is provided with a jet device, each jet device is connected with a jet water taking opening through a pipeline, each jet device is provided with a medicine inlet, and each medicine inlet is connected with a sodium hypochlorite pipeline; according to the utility model, the two jet devices which are oppositely arranged are arranged on the water passing pipeline, so that primary mixing of sodium hypochlorite in the jet devices and secondary mixing after hedging are realized, the mixing uniformity and the mixing efficiency are improved, the purposes of rapid mixing and uniform disinfection are realized, and the mixing effect is determined by the size of the jet pump; and the influence of water flow is avoided.

The application discloses a kind of breathable far infrared fiber fabric and preparation method thereof, it is related to fiber fabric technical field.The application is prepared when breathable far infrared fiber fabric, phosphorus-containing triamino compound is reacted with double bond modified silane, hydroxypropyl methacrylate, 2-[2-hydroxy-5-[2-(methacryloyloxy) ethyl] phenyl]-2H-benzotriazole to obtain modified liquid;Pre-modified graphene is reacted with 3-bromopropyl-5,5-dimethyl hydantoin to obtain modified graphene;After dispersing modified graphene, fiber, 3-glycidyl ether oxypropyl trimethoxysilane, modified liquid are added, and modified fiber is prepared after reaction;After weaving and spinning modified fiber, soak sodium hypochlorite solution, and prepare breathable far infrared fiber fabric.The breathable far infrared fiber fabric prepared by the application has the advantages of air permeability, far infrared, antibacterial, flame retardant, ultraviolet protection and washing resistance.

This utility model relates to the field of sodium hypochlorite production technology and discloses a sodium hypochlorite production system, including a feeding unit, an electrolysis unit, and a storage unit. The feeding unit includes a softening section, a heat exchange section, and a salt dissolving section. The softening section generates softened water. The heat exchange section and the salt dissolving section are connected in parallel on one side of the softening section. The heat exchange section is used to regulate the temperature of the softened water to generate dilution water. The salt dissolving section is used to dissolve the softened water and salt to obtain brine. The electrolysis unit includes a dilution tank and an electrolytic cell. The dilution tank is used to mix and dilute the dilution water and the brine to obtain diluted brine. The electrolytic cell is used to electrolyze the diluted brine to generate sodium hypochlorite. The storage unit is used to store the sodium hypochlorite generated by the electrolysis unit. This utility model has the beneficial effect of high sodium hypochlorite production efficiency.

The invention discloses a modified cellulose acetate dialysis membrane and a preparation method thereof.The preparation method comprises the following steps that after a cellulose acetate membrane is hydrolyzed for 1 min, the acetyl part of the cellulose acetate membrane is removed, then the cellulose acetate membrane with the acetyl part removed is subjected to an oxidation reaction, and the cellulose acetate membrane with the acetyl part removed is obtained; a selective oxidation catalyst A and / or a co-catalyst B are / is used in the oxidation reaction process, and an oxidant C is one of sodium hypochlorite, sodium chlorite, calcium hypochlorite, hydrogen peroxide, persulfate or sodium periodate; and then adding chitosan which is subjected to crosslinking modification by dialdehyde cellulose to carry out grafting reaction. According to the method, the grafting effect can be optimal only through the synergistic cooperation of the carboxyl active site amount and the crosslinking degree of the chitosan, and the urea adsorption capacity and the blood compatibility of the cellulose acetate membrane are remarkably improved.

The invention discloses a preparation method of a carboxyl magnetic starch material, and belongs to the technical field of food safety. The material is prepared by performing enzymolysis on corn starch to form pores, catalyzing sodium hypochlorite to oxidize by TEMPO to introduce carboxyl, and compounding with Fe3O4 (at) SiO2 magnetic nanoparticles. The preparation method comprises the following steps: pretreating ferric oxide to prepare magnetic particles, carrying out enzymolysis on corn starch, carrying out oxidation modification and carrying out water-phase compounding. The material can efficiently adsorb food-borne heterocyclic aromatic amine, the content and peroxide value of heterocyclic aromatic amine in repeatedly used marinating soup or fried vegetable oil are reduced, high-selectivity capture and magnetic separation recovery are achieved, and the material has the advantages of being economical and environmentally friendly.

This invention provides a method for producing a chromium-aluminum-iron alloy, including steps such as raw material mixing. The raw materials used in the mixing process are chromium oxide, aluminum powder, lime, and sodium chlorate. The process employs a two-step smelting method: first, an aluminothermic reduction reaction is used, and second, an electric heating method is employed in a refining furnace. This process homogenizes the molten iron, chromium, and aluminum alloys with different specific gravities, preventing heavier iron and chromium from sinking and lighter aluminum from floating, thus avoiding alloy segregation. The chromium oxide yield produced by this method reaches 93.97%, which is 5-6 percentage points higher than the yield of metallic chromium produced by the conventional aluminothermic method. The metallic aluminum yield reaches 98%-99%, with low aluminum burn-off.

The invention provides a preparation method and application of a mesoporous material Ce / Ti-UiO-66-NH2, and the preparation method comprises the following steps: 1) mixing a certain amount of template agent, ceric ammonium nitrate, terephthalic acid, TMB, acetic acid and sodium perchlorate, dissolving in deionized water, and reacting to obtain Ce-UiO-66; (2) adding a certain amount of tetrabutyl titanate into a N, N-dimethylformamide solution containing Ce-UiO-66, and carrying out hydrothermal reaction, so as to obtain a Ce / Ti-UiO-66 solid; and (3) carrying out ultrasonic treatment on a certain amount of 2-aminoterephthalic acid and the Ce / Ti-UiO-66 solid in a methanol solution to obtain a Ce / Ti-UiO-66-NH2 solid. According to the method, simple and convenient synthesis of mesoporous Ce-UiO-66 can be achieved, the problem that in the prior art, a mesoporous Ce-UiO-66 synthesis method is difficult is solved, the metal titanium ion-doped and amino-loaded Ce / Ti-UiO-66-NH2 mesoporous material is prepared, and meanwhile, a new material is provided for the fields of photocatalysis and the like.

The utility model relates to the technical field of sodium hypochlorite purification liquid, and discloses a sodium hypochlorite purification liquid adding device which comprises a storage tank and further comprises a first connecting pipe and a dismounting mechanism, the first connecting pipe is fixedly connected with the interior of the storage tank, and the dismounting mechanism for sealing the storage tank is arranged outside the storage tank. The right side of the first connecting pipe is fixedly connected with a second connecting pipe, the outside of the second connecting pipe is fixedly connected with an extraction cylinder, the inside of the extraction cylinder is in threaded connection with a first threaded rod, the bottom of the first threaded rod is fixedly connected with a rotating block, and the outside of the rotating block is rotatably connected with a connecting block. The rubber disc slides to extract the sodium hypochlorite purification liquid into the extraction barrel, meanwhile, the storage amount of the sodium hypochlorite purification liquid in the extraction barrel is observed through the scale marks, extraction is stopped in time when the appropriate dosage is reached, then the sodium hypochlorite purification liquid is discharged into the temporary storage barrel to be temporarily stored, the dosage can be accurately controlled through the scale marks, adding is more accurate, and the use effect is better. And fluctuation and uncertainty are reduced.