147 results about "Ammonium bifluoride" patented technology

The invention belongs to the technical field of oil and gas development, and particularly relates to an oil and gas well blocking remover and a preparation method thereof. The blocking remover comprises the following components: 5-8% of low-carbon composite organic acid, 5-7% of fluoboric acid, 6-9% of ammonium bifluoride, 4-6% of an anti-acid sludge mutual solvent, 2-4% of a corrosion inhibitor, 2-4% of polyoxypropylene polyoxyethylene propylene glycol ether, 8-12% of a permeation dispersion surfactant, 2-5% of a sulfur dissolving agent, 2-5% of a stable chlorine dioxide solution and the balance of water. The preparation method comprises the following steps: adding the low-carbon composite organic acid, the fluoboric acid and the ammonium bifluoride into water and stirring; adding an acid sludge resisting mutual solvent and a sulfur dissolving agent, and stirring; adding the corrosion inhibitor, the polyoxypropylene polyoxyethylene propylene glycol ether and the permeation dispersion surfactant, and stirring; and finally, reducing the stirring speed, adding the stable chlorine dioxide solution, and stirring to uniformly mix. The blocking remover provided by the invention is comprehensive in blocking removal function, very good in dissolving and dispersing performance on complex blocking substances, very small in corrosion damage to a shaft pipe wall and wide in applicability.

The invention relates to a purification method of high-purity diamond, and relates to the technical field of diamond purification. The purification method comprises raw material pretreatment, microwave-assisted ionic liquid stripping, solid-liquid separation and ionic liquid recovery, deep purification, separation and drying, and the raw material pretreatment comprises the following steps: crushing an impurity-containing coarse diamond raw material into particles of 2-5mm, then carrying out wet ball milling in ethanol for 4-6 hours, refining the particles to 50-200 microns, and carrying out microwave-assisted ionic liquid stripping on the particles to obtain refined particles; immersing the particles into a mixed solution of 10% diluted hydrochloric acid and 2% ammonium bifluoride, performing ultrasonic treatment for 2 hours, and performing centrifugal washing with ultrapure water until the particles are neutral; the microwave-assisted ionic liquid stripping method comprises the following steps: mixing the pretreated raw material with an ionic liquid according to a mass ratio of 1: (5-10), and carrying out microwave treatment for 10-30 minutes to obtain a reaction mixture. According to the purification method, diamond impurities are efficiently removed, meanwhile, the surface structure of the diamond can be protected against damage, waste liquid can be recycled, and the influence on the environment is small.

The invention discloses an efficient thermal cycle drying device for producing flaky ammonium bifluoride, and relates to the technical field of ammonium bifluoride production. Comprising a machine body, an exhaust pipe and an air inlet sleeve, a first shell and a second shell are sequentially mounted at the upper end of the machine body from left to right, an air inlet cavity is formed in the bottom of the inner side of the machine body, and a mounting cylinder is connected to the upper end of the air inlet cavity through a spring; through cooperation of a mounting cylinder, a movable cylinder, a scraping plate and a first adjusting assembly, when materials are subjected to traditional one-way vibration blowing heat exchange, the materials are thrown and turned in the other direction to increase the drying uniformity, meanwhile, the air flow pressure of an exhaust hole is correspondingly adjusted, and the heat exchange drying effect is improved; and through cooperation of the movable barrel and the second adjusting assembly, when materials with the large water content and the large feeding amount are dried, the moving speed of the materials is increased, meanwhile, the air flow pressure of the exhaust holes is correspondingly adjusted, and the heat exchange drying effect is improved.

The invention relates to the technical field of battery recovery, and particularly discloses a recovery method of a waste lithium ion battery negative electrode material and a lithium ion secondary battery. The recycling method comprises the following steps: discharging, disassembling and separating the waste lithium ion battery to obtain a waste shell, a waste positive electrode material, a waste negative electrode material and a waste diaphragm material; crushing and screening the waste negative electrode material to obtain waste negative electrode powder; the method comprises the following steps: mixing waste negative electrode powder with ammonium bifluoride, and roasting for a preset time at 100-500 DEG C in an inert gas atmosphere; carrying out water leaching treatment on the roasted product, and carrying out solid-liquid separation on the obtained slurry to obtain a first leaching solution and a regenerated negative electrode material; mixing the first leaching solution with a reducing agent, reacting, and carrying out solid-liquid separation to obtain a second leaching solution and copper slag; mixing the second leaching solution with alkali, reacting, and carrying out solid-liquid separation to obtain a third leaching solution and positive electrode precursor slag; and concentrating the third leachate to obtain recovered ammonium bifluoride. By implementing the method, green closed-loop recovery of all parts of materials can be realized, and the energy consumption is low.

The invention relates to the technical field of digestion, in particular to a pretreatment method for digesting a glass substrate. The pretreatment method comprises the following four key steps: firstly, crushing and grinding a glass substrate sample into powder so as to increase the contact area and accelerate the subsequent reaction speed; next, adding a mixture of ammonium bifluoride and ammonium fluoride and the powder sample into a polytetrafluoroethylene beaker, adding a small amount of water for wetting, and then adding concentrated hydrochloric acid and concentrated nitric acid to effectively promote the dissolution of the sample; then, the beaker is placed on a heating plate to be heated and digested, and after it is confirmed that the sample is completely digested by monitoring the state of the solution, the sample is cooled to the room temperature. And finally, transferring the digestion solution to a volumetric flask, rinsing the original beaker for multiple times with pure water, and diluting to a constant volume. According to the method, the digestion time is remarkably shortened, the background interference is reduced, the detection precision is improved, and the method is particularly suitable for the requirements of high-end analysis equipment such as AAS and ICP.

The invention discloses a recycling method of NF3 residual electrolysis liquid, and relates to the technical field of residual electrolysis liquid recycling treatment. The method comprises the following steps: step 1, removing Fe ions in the electrolytic residual liquid: firstly, adding hydrogen peroxide or oxygen into the electrolytic residual liquid for reaction, oxidizing ferrous ions into ferric ions, then adding ammonia water and sodium hydroxide or ammonium bicarbonate and sodium hydroxide into the solution for reaction, precipitating ferric ions in the form of ferric hydroxide; 2, hydrofluoric acid is added into the electrolyte solution obtained after iron removal to adjust the pH of filtrate to 3-12, the filtrate enters an extraction system, the nickel element in ammonium hydrogen fluoride is extracted out, and ammonium hydrogen fluoride is purified; and step 3, the nickel element separated from the electrolyte enters a second section to be extracted and synthesized into a nickel sulfate product.

The invention discloses a graphene quantum dot material as well as a preparation method and application thereof, and belongs to the technical field of biomedical materials. The preparation method comprises the following steps: S1, carrying out hydrothermal reaction on a mixed solution of mesoporous SiO2 and a carbon source to obtain a product I; s2, the product I and a fluoride solution are mixed to remove SiO2, and a product II is obtained; and S3, refining the product II to obtain the graphene quantum dot material. The carbon source is selected from at least one of triammonium citrate, diammonium hydrogen citrate, citric acid, folic acid, urea, thiourea and dicyanodiamine; the fluoride is selected from ammonium bifluoride and / or hydrogen fluoride. The particle size of the graphene quantum dot material provided by the invention is 15-30nm, the distribution is controllable, and the raw materials are easy to obtain; the prepared platinum nanoparticle / graphene quantum dot composite nanomaterial is high in solubility, stable in physical and chemical properties and remarkable in chemotherapy effect.

The invention relates to the technical field of surface strengthening treatment and coating preparation, in particular to a micro-arc oxidation electrolyte, a preparation method of the micro-arc oxidation electrolyte and a preparation method of an oxide ceramic coating on the surface of a magnesium-copper dissimilar metal material component. The invention provides a micro-arc oxidation electrolyte. The micro-arc oxidation electrolyte comprises a main film-forming agent, an arcing aid, a pH regulator, a corrosion inhibitor and water, the main film-forming agent comprises ammonium fluozirconate and / or potassium fluozirconate; the arcing aid comprises one or more of disodium hydrogen phosphate, sodium dihydrogen phosphate, ammonium dihydrogen phosphate and diammonium hydrogen phosphate; the corrosion inhibitor comprises one or more of hexamethylenetetramine, ammonium bifluoride and triethanolamine. The micro-arc oxidation electrolyte breaks through the problem that valve metal and non-valve metal cannot be subjected to arc discharge at the same time for micro-arc oxidation treatment in the micro-arc oxidation process.

The invention provides a method for preparing high-purity flaky alumina based on a hydrolysis method, and belongs to the field of high-purity flaky alumina powder. The method comprises the steps that metal aluminum scraps are pretreated; the method comprises the following steps: putting metal aluminum scraps, an alkaline organic matter catalyst and a morphology control agent into water, and carrying out a hydrolysis reaction at a set temperature for a set time to obtain a reaction mixed solution; carrying out solid-liquid separation, washing and drying on the reaction mixed solution to obtain flaky aluminum hydroxide; and roasting the flaky aluminum hydroxide to remove crystal water so as to obtain high-purity flaky aluminum oxide, wherein the alkaline organic matter catalyst comprises at least one of the following components: tetraethylammonium hydroxide, tetramethylammonium hydroxide, tetrapropylammonium hydroxide and tetrabutylammonium hydroxide; the morphology control agent comprises at least one of ammonium bifluoride and ammonium fluoride. The preparation method disclosed by the invention is simple in process flow, free of an impurity removal process, mild in reaction condition, short in reaction time and free of environmental pollution, and the product is regular in shape and high in purity.

The invention discloses a preparation method of calcium fluoride. Specifically, the invention discloses a preparation method of calcium fluoride, which comprises the following steps: carrying out ball milling treatment on calcium hydroxide and ammonium bifluoride to prepare calcium fluoride. According to the method, the calcium fluoride powder which is high in purity, free of water or low in oxygen content can be obtained, so that the requirements of optical-grade calcium fluoride crystal raw materials are met; the method disclosed by the invention is simple in process flow, mild in reaction condition and small in environmental pollution, and can be suitable for industrial large-scale production.

The present invention provides a method for preparing large-sized aluminum fluoride products from aluminum electrolyte leaching solution, belonging to the technical field of aluminum electrolyte resource recovery. S1: Take the aluminum electrolyte leaching solution, and the molar ratio of F element to Al element in the aluminum electrolyte leaching solution is 1-2.5:1; S2: Heat the aluminum electrolyte leaching solution and add an alkali solution. When hydroxyaluminum fluoride precipitates in the aluminum electrolyte leaching solution, add crystal seeds and an organic surfactant, and continue to add the alkali solution to adjust the pH value to 2-7; stir and age, and then filter to obtain a filter cake and a filtrate; S3: Dry the filter cake, add ammonium bifluoride, mix well and then calcine to obtain aluminum fluoride products. The present invention provides a method for preparing large-sized aluminum fluoride products from aluminum electrolyte leaching solution, which solves the technical problems of too fine particle size and low purity of aluminum fluoride products in the prior art.

The invention provides a nitrogen-fluorine double-element doped porous carbon material, a silicon-carbon negative electrode material and a preparation method thereof, and the preparation method of the porous carbon material comprises the following steps: mixing porous carbon with ammonium fluoride and / or ammonium bifluoride, and carrying out vapor deposition coating or liquid phase coating; and calcining the coated porous carbon material in a closed environment in an inert atmosphere to obtain the nitrogen-fluorine double-element doped porous carbon material. According to the invention, by utilizing the characteristics of nano-scale micropores and super-large specific surface of porous carbon and the properties of low melting point and low boiling point of ammonium fluoride and ammonium bifluoride, a uniformly coated ammonium fluoride and ammonium bifluoride coating layer is obtained by adopting a vapor deposition or liquid phase coating method, and then the porous carbon material is obtained by utilizing high-temperature calcination treatment. According to the present invention, the characteristics of high specific surface and nano-scale micropores can be simultaneously retained, and after the silicon-carbon negative electrode material is prepared, the expansion of the silicon-carbon negative electrode material is substantially reduced, the cycle performance of the material is ensured, and the rate capability of the obtained silicon-carbon negative electrode material is improved.

The utility model relates to the technical field of anhydrous ammonium hydrogen fluoride preparation, and discloses a micro-channel reaction device for preparing anhydrous ammonium hydrogen fluoride, which comprises a raw material tank, a vaporizer, a micro-channel reactor and a shell-and-tube heat exchanger, two driving motors are mounted at the upper end of the micro-channel reactor, stirring rods are mounted at the lower ends of the driving motors through motor shafts, a plurality of stirring blades are arranged on the stirring rods, a micro-channel groove is formed in the middle in the micro-channel reactor, a plurality of channels are uniformly distributed in the micro-channel groove, and two catalysts are mounted at the bottom end in the micro-channel reactor. Two driving motors are started, the driving motors drive stirring rods to rotate through motor shafts, the flow speed of ammonium bifluoride gas is increased, multiple channels are formed in the micro-channel groove, the contact area and the retention time of reaction gas can be increased through the channels, the reaction efficiency is improved, the reaction gas reacts with other reactants under the action of a catalyst, and the reaction efficiency is improved. Anhydrous ammonium bifluoride and other byproducts are generated, so that the reaction is sufficient.

The invention provides a synthesis method of ammonium tetrafluorogallate, which comprises the following steps: firstly, dehydrating and fluorinating gallium fluoride trihydrate in a molten state by using ammonium bifluoride, and then carrying out secondary fluorination and further impurity removal on the reaction product to obtain the ammonium tetrafluorogallate for fluoride glass with higher purity. The preparation process of the gallium fluoride trihydrate is simple, convenient and safe.

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 present application relates to a method for reducing the content of sulfur in aluminum fluoride, which comprises the following steps: uniformly mixing crude aluminum fluoride powder containing sulfate impurities with ammonium hydrogen fluoride powder to obtain a mixture; placing the mixture in a reactor and performing programmed temperature calcination under a protective atmosphere; discharging the sulfur and fluorine-containing volatile gas generated by calcination after treatment by an absorption system; cooling the calcined material to room temperature; washing the cooled material with water or blowing inert gas to remove residual ammonium salt or dust, and then drying to obtain a low-sulfur aluminum fluoride product. The in-situ HF generated by the decomposition of NH4HF2 is used for gas-solid reaction, which can effectively attack and convert stable sulfate impurities existing in various forms, has high desulfurization efficiency and is deep and thorough; the reaction conditions are mild, the main phase of the product is stable, the process flow is simple, and the energy consumption is low.

The invention belongs to the field of spectrum chemical analysis, and particularly relates to a detection method for measuring the silver content in crude copper through atomic absorption spectrometry. The method comprises the following specific steps: dissolving with nitric acid, adding bromine water and hydrochloric acid, steaming to be nearly dry, and leaching with hydrochloric acid; if particles which are not completely dissolved exist only by using nitric acid and hydrochloric acid, filtering, adding a saturated ammonium bifluoride solution, nitric acid-sulfuric acid mixed acid and perchloric acid, heating and dissolving, smoking until smoke is exhausted, adding hydrochloric acid for leaching, transferring into a volumetric flask (not separately taken), taking hydrochloric acid as a medium, matching a copper matrix with a silver standard solution, acetylene as fuel gas and air as combustion-supporting gas, and performing gradient elution to obtain the copper-silver alloy. And measuring the silver content on an atomic absorption spectrometer. The method has the characteristics of simplicity in sample pretreatment, high detection result accuracy, good precision, simplicity in operation, high practicability and the like.

The invention belongs to the technical field of wafer processing, and particularly relates to an organic etching solution for etching a groove of a quartz wafer and application of the organic etching solution. The organic etching liquid comprises 10%-20% of hydrogen fluoride, 20%-30% of ammonium bifluoride, 40% of pure water, 10%-12% of trisodium phosphate, 4%-8% of sodium chromate and 2% of polyethylene glycol. According to the organic etching solution prepared by the invention, the stability of the tuning fork quartz frequency chip is improved, the electrical property of the tuning fork quartz frequency chip is improved, the corrosion shape of the groove can be controlled by changing the corrosion rate of different crystal faces, and the effect of improving the performance is achieved.

The invention provides a process for purifying nickel from electrolytic waste for preparing nitrogen trifluoride, which comprises the following steps: after a nitrogen trifluoride electrolytic cell stops electrolysis, transferring the electrolytic waste into a first batching kettle, adding anhydrous hydrogen fluoride, dissolving ammonium bifluoride mixed in the electrolytic waste into a molten state, and adding a second batching kettle; then solid-liquid separation is achieved in a centrifugal mode, and the liquid part is molten liquid to be reused as electrolyte; ammonia water is added into a second batching kettle to adjust the pH value, solid-liquid separation is achieved in a centrifugal mode, the liquid part is transferred into an intermediate tank, potassium hydroxide is added to continue to adjust the pH value, nickel in the solution is precipitated out, ammonia escapes and is prepared into dilute ammonia water in a falling film absorption mode, and the dilute ammonia water can return to a system to be reused; the solid part directly enters a smelting furnace, the temperature is gradually increased until nickel is smelted into a liquid state, then cooling is conducted, and the nickel purity can reach 99% or above. According to the method, the nickel in the electrolytic waste mixed with the sediments in the nitrogen trifluoride electrolytic cell is purified, and appreciation is achieved.

The invention discloses marble rust removal gel, and relates to the technical field of marble surface processing treatment. The rust removal gel for marble comprises the following components in percentage by weight: 5-20% of ammonium bifluoride; 3-20% of organic acid; and 0.2 to 1% of xanthan gum. The marble rust removal gel provided by the invention is gel-like liquid, can be well attached to the surface of marble, and has the advantages of good rust removal effect and no corrosion to the surface of the marble.

The utility model discloses an ammonium bifluoride self-separation device which comprises a shell supported on the ground through a base, a feeding cylinder and a discharging cylinder are connected to the two ends of the inner wall of the shell respectively, a centrifugal cylinder is arranged between the feeding cylinder and the discharging cylinder, a screening plate is arranged on the outer wall of the centrifugal cylinder, and the screening plate is arranged on the outer wall of the shell. The two ends of the centrifugal barrel are rotationally connected with the feeding barrel and the discharging barrel correspondingly, a feeding hopper communicating with the feeding barrel is arranged at one end of the outer wall of the top end of the shell, the bottom end of the discharging barrel communicates with a solid discharging pipe, one end of the liquid cavity communicates with a liquid outlet pipe, a cavity is formed in the base, and a motor is fixed to the inner wall of the cavity. An output shaft of the motor is connected with a driving gear, and a driven gear meshed with the driving gear in a transmission mode is arranged on the outer wall of the centrifugal cylinder. According to the utility model, the feeding cylinder, the centrifugal cylinder, the feeding hopper and the discharging cylinder are arranged, so that the continuous separation of mother liquor and crystals is realized, and the production efficiency is improved.

The present invention discloses a method for eliminating the influence of associated calcium iron pyroxene in thiosulfate leaching process, and belongs to the field of hydrometallurgy. The specific process of the present invention is to first place the associated calcium iron pyroxene gold mine in a pretreatment solution containing sodium hydroxide, ammonium bifluoride or a mixture of the two and a mixture of sodium fluoride and acid for stirring pretreatment. Then, the treated mineral is placed in a copper ammonia thiosulfate solution for leaching, so as to reduce the consumption of thiosulfate and improve the leaching rate of gold in the associated calcium iron pyroxene gold mine; the present invention effectively solves the problem that thiosulfate leaching of the associated calcium iron pyroxene contained in the gold mine causes high thiosulfate consumption and low leaching rate of gold; it has the advantages of simple process, easy control, efficient gold leaching, etc.

The application discloses a method and system for preparing ammonium bifluoride from hydrofluoric acid waste liquid, which comprises the following steps: (1) adding the hydrofluoric acid waste liquid into an electrolytic cell, transporting the electrolytic cell to a first reaction kettle after electrodepositing treatment, adding silicon dioxide, then stirring and reacting, and returning the generated silicon tetrafluoride and hydrofluoric acid into a spray tower to react and then return to the first reaction kettle, and then adding ammonia water to perform neutralization reaction; (2) filtering the solid-liquid mixture I, evaporating and drying the obtained filtrate I to obtain an ammonium nitrate product, and returning the obtained filter cake I to a second reaction kettle, adding ammonia water to adjust the pH value, and then stirring and reacting; (3) filtering the solid-liquid mixture II, returning the obtained filter cake II to the first reaction kettle for reuse, transporting the obtained filtrate II to a reactor, adding hydrofluoric acid to perform reaction, and then performing evaporation and drying treatment to obtain an ammonium bifluoride product. The method is simple in process, low in energy consumption, convenient to operate and convenient for industrialized production and application.

The invention relates to the field of material surface treatment, in particular to a chemical polishing solution and a polishing method. The chemical polishing solution is suitable for the ferro-nickel alloy with the nickel content of 20-60% and the doped element content of less than 1%, and comprises an accelerant, a first acidic agent, a second acidic agent, a corrosion inhibitor, a brightener and a solvent. The first acidic agent comprises at least one of sulfuric acid, hydrochloric acid, nitric acid, phosphoric acid and hydrofluoric acid, and the content is greater than or equal to 5%. The second acidic agent comprises at least one of ammonium bifluoride, ammonium fluoride, formic acid, benzoic acid, acetic acid, propionic acid, butyric acid, lactic acid, oxalic acid, malonic acid, tartaric acid, malic acid and citric acid, and the content of the second acidic agent is 1%-50%. The total content of the first acidic agent and the second acidic agent is 6-60%. The accelerant is used for oxidizing metal nickel and metal iron, and the content of the accelerant is 0.01%-5%. And the content of the corrosion inhibitor is 0.1-5%. By combining the accelerant, the first acid agent, the second acid agent and the corrosion inhibitor, the dissolving speed of the nickel phase and the iron phase is balanced, the surface flatness is improved through the brightening agent, and the polishing effect is improved.

This invention relates to the field of galvanized steel wire technology, and proposes a high-strength galvanized steel wire and its preparation method. The preparation method of high-strength galvanized steel wire includes the following steps: activating the steel wire, then subjecting it to fluxing to obtain a pretreated steel wire; hot-dip galvanizing the pretreated steel wire, followed by passivation, to obtain high-strength galvanized steel wire; during fluxing, the flux consists of the following components by mass percentage: 20%~25% zinc chloride, 16%~20% ammonium chloride, 1.0%~2.0% additives, 1%~2% nickel chloride, 1%~2% lanthanum nitrate, 0.2%~0.5% ammonium bifluoride, with the balance being water; the additives are palmitamide propyl betaine and disodium lauryl sulfosuccinate. Through the above technical solution, the problem of insufficient wear resistance of galvanized steel wire in related technologies is solved.

The utility model relates to the technical field of environmental protection, in particular to a system for treating ammonia-containing waste gas of a PEVCD process by utilizing low-quality fluorine-containing waste water in the photovoltaic industry. Comprising a wastewater conveying pipe for fluorine-containing wastewater, an ammonia-containing waste gas absorption device, a membrane type solid-liquid concentration and separation device, an electrodialyzer, a wastewater storage tank for high-concentration fluorine-containing wastewater, a crystallization part, a drying part and a wastewater station, a set of system for treating the ammonia-containing waste gas generated by the PEVCD process by utilizing the low-quality fluorine-containing waste water generated in the photovoltaic industry is provided for the waste water and waste gas treatment industry, the ammonium bifluoride product can be prepared while the fluorine-containing waste water and the ammonia-containing waste gas are treated by utilizing the treatment system disclosed by the invention, and the treatment system has relatively good environmental protection property and also can be used for treating the ammonia-containing waste gas generated by the PEVCD process. Good economic benefits can be generated, and high practicability is achieved.

This invention belongs to the field of ammonium bifluoride purification technology, and specifically relates to a multi-stage filtration mechanism for ammonium bifluoride purification. The mechanism includes a tank with protective components on its outer surface, a discharge port at the bottom, a feed port on one side of the top, a motor in the center of the top, a rotating shaft at the motor's output end, a centrifugal drum at the bottom of the shaft, a flow guide platform below the centrifugal drum, and a bag filter at the bottom of the flow guide platform. This invention, through the cooperation of the motor, centrifugal drum, flow guide platform, bag filter, and activated carbon adsorption plate, enables the filtration mechanism to perform multi-stage filtration, avoiding the problem of poor impurity separation when filtration and purification of ammonium bifluoride in the liquid phase. Furthermore, the cooperation of the protective frame, rubber damping plate, rotating rod, and pressure relief cylinder prevents the surface of the device from easily denting or cracking after external impact.

The invention discloses porous ferric fluoride, a preparation method and application of the porous ferric fluoride in a lithium ion battery, and belongs to the technical field of lithium ion batteries. The method comprises the following steps: stirring Lewis alkali and iron-containing Lewis acid under a heating condition to form a clear solution, adding a carbon source into the clear solution, and stirring to form uniform slurry; adding ammonium bifluoride, continuously stirring, alternately washing the obtained precipitate with ethanol and acetone, centrifuging until the supernatant is colorless and transparent, and drying to obtain a precursor; and finally, uniformly grinding the precursor, performing heat treatment, naturally cooling to room temperature, and fully grinding to obtain the porous ferric fluoride. The preparation process is simple and safe, the cost is low, the use of dangerous chemicals hydrofluoric acid and nitrogen fluoride is avoided, and large-scale synthesis can be realized; the prepared ferric fluoride has a porous morphology, is beneficial to electrolyte infiltration, ensures that the electrical contact between active particles is not influenced while the active material is in full contact with the electrolyte, and improves the electrochemical performance.

The application discloses a recycling method of NF3 electrolysis residual solution and relates to the technical field of electrolysis residual solution recycling treatment. The method comprises the following steps: step 1: removing Fe ions in the electrolysis residual solution; first, hydrogen peroxide or oxygen is added into the electrolysis residual solution to oxidize the divalent iron ions into trivalent iron ions, and then ammonia water and sodium hydroxide or ammonium hydrogen carbonate and sodium hydroxide are added into the solution to react, so that the trivalent iron ions are precipitated in the form of iron hydroxide; step 2: the electrolyte solution after the removal of iron is adjusted to a pH of 3-12 by adding hydrofluoric acid, enters an extraction system, extracts the nickel element in the ammonium hydrogen fluoride, and purifies the ammonium hydrogen fluoride; and step 3: the nickel element separated from the electrolyte solution enters a second extraction to synthesize a nickel sulfate product.

This invention discloses a radiation-resistant glass, its preparation method, and its application. The radiation-resistant glass comprises the following components in weight percentage: silicon dioxide 60%-70%; sodium oxide 13%-18%; zinc oxide 3%-6%; aluminum oxide 2%-6%; boron trioxide 1%-6%; strontium oxide 1%-3%; cerium dioxide 4.7%-5.5%; lanthanum trioxide / hafnium dioxide 1%-3%; and ammonium difluoride 0.3%-1%. The technical problem to be solved is to significantly improve the high-energy particle radiation protection and light transmittance of the glass by selecting a specific formulation.