23results about "Nickel halides" patented technology

The invention provides a method for removing ferrous iron in a nickel chloride solution through efficient oxidation promotion, belongs to the technical field of purification treatment of chlorination system solutions, and solves the problem that free ferrous iron in the nickel chloride solution cannot be effectively oxidized and converted into ferric iron in the prior art. Controlling the concentration of main metal nickel ions, and adding a corresponding amount of hydrogen peroxide into the nickel chloride solution for stirring according to the content of impurity Fe in the nickel chloride solution; injecting the stirred nickel chloride solution into an electrolytic bath, heating, and raising the temperature of the nickel chloride solution in the bath; and the cathode and the anode in the electrolytic bath are conducted, and the introduced nickel chloride solution is subjected to electrolytic treatment, so that divalent iron in the nickel chloride solution can be converted into trivalent iron. The process flow is simple, the production process is easy to control, the facility equipment investment is low, and the final benefit is remarkable.

To provide an apparatus and a method for producing an aqueous solution of nickel chloride which can obtain an aqueous solution of nickel chloride from which dissolved chlorine gas has been removed.SOLUTION: There is provided an apparatus AA for producing an aqueous solution of nickel chloride which comprises a dissolution tank 1 in which a first nickel raw material is chlorine leached to obtain an aqueous solution of nickel chloride and an adjustment tank 3 in which the aqueous solution of nickel chloride discharged from the dissolution tank 1 is brought into contact with a second nickel raw material to leach the second nickel raw material with chlorine gas dissolved in the aqueous solution of nickel chloride. Since the chlorine gas dissolved in the aqueous solution of nickel chloride is consumed to leach the second nickel raw material, the chlorine gas can be removed from the aqueous solution of nickel chloride.SELECTED DRAWING: Figure 1

This invention belongs to the field of secondary battery cathode material recycling technology. More specifically, it relates to a plasma-sulfate combined method for recycling ternary battery cathode materials. The specific recycling method of this invention includes: immersing the cathode sheet in the solvent N-methylpyrrolidone, ultrasonically treating it to separate the active material layer on the cathode sheet surface from the current collector aluminum foil, sieving to remove the separated current collector aluminum foil, obtaining the cathode material; transferring the cathode material into a microwave reactor, heating it to 450-500℃ in a nitrogen atmosphere, holding the temperature for 10-20 minutes, cooling, and discharging to obtain pyrolysis material; transferring the pyrolysis material to a plasma chamber, using a reducing gas as plasma, and plasma treating it for 20-30 minutes under conditions of a gas pressure of 50-60 Pa and a radio frequency power of 480-550 W to obtain reduced material; using a compound acid leaching solution as the leaching solution, mixing it with the reduced material, and acid leaching for 45-80 minutes to obtain the leaching solution.

The invention relates to the technical field of preparation of metal compounds, in particular to a preparation method of spherical nickel oxalate, and aims to solve the problems of poor morphology control of spherical nickel oxalate products and low mother liquor utilization rate caused by low sphericity degree, wide particle size distribution and influence of additives on process stability in the conventional preparation process of spherical nickel oxalate. According to the method, by accurately controlling the concentration of the nickel chloride solution, the reaction temperature, the oxalic acid adding mode and the like, the prepared spherical nickel oxalate is regular in morphology and uniform in granularity, the Ni content is larger than or equal to 32%, and the impurity element content is smaller than or equal to 0.007%; meanwhile, the mother liquor treatment process is added, cyclic utilization of the mother liquor is achieved, expensive equipment or additives are not needed, the quality requirement of a high-end nickel-based material for a precursor is greatly met, efficient and stable preparation of spherical nickel oxalate is achieved, meanwhile, the mother liquor utilization rate is increased, and the production cost and environmental protection pressure are effectively reduced; and the requirements on high-performance spherical nickel oxalate in the production of batteries, catalysts and the like are ensured.

The invention relates to the technical field of non-ferrous metal hydrometallurgy, in particular to a nickel chloride solution desulfurization method which comprises the following steps: step 1, deoiling a nickel chloride solution through activated carbon and a cloth bag filter to obtain deoiled liquid; wherein the sulfur content in the nickel chloride solution is 15-25 ppm, the concentration of Ni < 2 + > is 90-110 g / L, and the pH value is 4-4.5; step 2, enabling the oil-removed liquid in the step 1 to enter a resin column according to a specified flow rate in a lower-in and upper-out manner, filling the resin column with resin, and adsorbing and reducing sulfur in the oil-removed liquid, so as to obtain a sulfur-removed nickel chloride solution; according to the method, the sulfur removal process is stable, other impurities are not generated or introduced, stable sulfur removal of the nickel chloride solution can be achieved, and due to the fact that the existence of sulfur in high-precision electronic-grade nickel protoxide directly influences stable operation and the service life of a battery material, liquid sulfur obtained after sulfur removal is conducted through the process is smaller than or equal to 10 ppm, and the sulfur content is smaller than or equal to 10 ppm. And the solution standard for producing a high-precision electronic-grade nickel protoxide product is met.

The utility model discloses a water bath heating device for preparing high-purity nickel chloride, and relates to the technical field of preparation of high-purity nickel chloride. The water bath device comprises a water bath barrel, a rack connected with the surface side of the water bath barrel is fixed on the surface side wall of the baffle plate; a mounting ring is fixed on the inner side wall of the water bath barrel; a filter screen is arranged on the upper end surface of the mounting ring; a heater is fixed on the surface side wall of the placing plate; and a tooth block meshed with the rack is fixed at the end part of the rotating block. The end opening of the water bath barrel is blocked through the baffle, so that hot air flowing is reduced, the water bath heating efficiency is improved, meanwhile, dirt separation is achieved through the filter screen, and nickel chloride on the containing plate can be rapidly taken and used conveniently through the tooth block and the rack.

The invention belongs to the technical field of secondary battery positive electrode material recovery. The invention relates to a recycling method, in particular to a method for recycling a ternary battery positive electrode material by combining plasma with sulfate. The specific recovery method of the product comprises the following steps: soaking a positive pole piece in a solvent N-methyl pyrrolidone, carrying out ultrasonic treatment to separate a surface active material layer of the positive pole piece from a current collector aluminum foil, and screening to remove the separated current collector aluminum foil to obtain a positive pole material; transferring the positive electrode material into a microwave reactor, carrying out microwave heating to 450-500 DEG C in a nitrogen atmosphere, carrying out a heat preservation reaction for 10-20 min, cooling, and discharging to obtain a pyrolysis material; transferring the pyrolysis material to a plasma chamber, and carrying out plasma treatment for 20-30 minutes under the conditions that the air pressure is 50-60 Pa and the radio frequency power is 480-550 W by taking reducing gas as plasma, so as to obtain a reduction material; and the compound acid leaching solution serves as a leaching solution and is mixed with the reduction material, then acid leaching reaction is conducted for 45-80 min, and the leaching solution is obtained.

The invention relates to the technical field of sodium ion batteries, in particular to a preparation method of a sodium-nickel fluoride battery positive electrode material, the positive electrode material, a battery positive electrode and a battery. The preparation method of the sodium-nickel fluoride battery positive electrode material comprises the following steps: in the presence of a precipitator, carrying out a co-precipitation reaction on nickel fluoride and a sodium source in a solvent to obtain a precipitate; and drying the precipitate, and sintering in a nitrogen atmosphere to obtain the sodium-nickel fluoride battery positive electrode material. According to the sodium-nickel fluoride battery, by optimizing the preparation process of the positive electrode material, the internal resistance is remarkably reduced, the rate capability is improved, and the sodium-nickel fluoride battery can stably work in high-power application.

To provide a method for producing anhydrous nickel chloride powder having a particle size distribution suitable for producing nickel fine powder without pulverization after production by adjusting the particle size in a process for heating nickel chloride hydrate.SOLUTION: There is provided a method for producing anhydrous nickel chloride powder comprising a step of obtaining anhydrous nickel chloride powder by heating nickel chloride hydrate. In the step of obtaining anhydrous nickel chloride powder, the pressure is controlled to 80 torr or less and to a saturated water vapor pressure or less at the product temperature of nickel chloride hydrate until the product temperature of nickel chloride hydrate reaches 65°C or nickel chloride hexahydrate becomes nickel chloride dihydrate while vibrating the nickel chloride hydrate.SELECTED DRAWING: Figure 1

The invention discloses a preparation method of fluorine-doped nickel oxide nano-particles, and relates to the technical field of solar cells, and the preparation method specifically comprises the following steps: preparing a fluorine-doped nickel oxide precursor by adopting a coprecipitation method, drying by combining a vacuum freeze drying technology, grinding, and calcining at 270 DEG C to finally obtain the fluorine-doped nickel oxide nano-particles. According to the method, a fluorine element is introduced as a lattice doping agent, the inherent low conductivity problem is fundamentally solved, and experimental results show that compared with undoped nickel oxide, the obtained fluorine-doped nickel oxide material has more excellent conductivity, hole extraction efficiency and electron transmission performance, the photoelectric performance of a perovskite solar cell can be remarkably improved, and the performance of the perovskite solar cell is improved. And a new material basis is provided for the application of the material in the field of photoelectric devices.

The present invention provides a method and device for separating nickel and iron from a nickel-iron alloy. The method comprises the following steps: roasting the nickel-iron alloy in a chlorine-containing atmosphere to obtain a roasting residue and an iron- and nickel-containing vapor phase, wherein the roasting temperature is 900-1200°C, and the roasting duration is 60-180 min; performing multi-stage condensation on the iron- and nickel-containing vapor phase, and collecting a solid phase obtained from first-stage condensation to obtain a nickel chloride product; and collecting a solid phase obtained from second-stage condensation to obtain an iron chloride product, wherein the second-stage condensation follows the first-stage condensation, and the condensation temperature of the second-stage condensation is 100-200°C. In the method for separating nickel and iron from a nickel-iron alloy, during roasting, highly selective volatilization of iron and nickel is achieved by controlling the roasting temperature and the roasting atmosphere, while impurities retain in the residue. Subsequently, by performing staged temperature-controlled condensation on the vapor phase obtained by roasting, high-purity nickel chloride and iron chloride products can be obtained separately.

The application relates to a preparation process of anhydrous nickel fluoride, which comprises the following steps: S1, pretreatment: providing nickel-containing fluorine etching waste liquid, and adjusting the pH value by adopting lye; S2, heat preservation and stirring: in the process of adjusting the pH value in step S1, the reaction temperature is controlled to be kept at 30-50 DEG C and stirring is carried out; S3, standing and aging: the liquid after the reaction in step S2 is subjected to standing and aging; S4, centrifugal separation: the liquid after the aging in step S3 is subjected to solid-liquid separation, and nickel fluoride wet material containing free water is obtained; S5, drying: the nickel fluoride wet material containing free water prepared in step S4 is dried by adopting a cyclone separator, and nickel fluoride products are obtained; wherein, the lye in step S1 is ammonia water, and the ammonia water is added in a step-by-step manner, and the proportion of the ammonia water mass added in each step in the total mass of the ammonia water is gradually increased. The application creates a dynamic reaction environment capable of effectively inhibiting the generation of hydrogen bonds by adjusting the pH value and controlling the temperature and stirring in a low-temperature range, and greatly improves the nickel content and yield of the products.

To provide a dissolving tank capable of enhancing efficiency of a chlorine leaching reaction of a nickel raw material and a method for manufacturing an aqueous solution of nickel chloride.SOLUTION: A dissolving tank 1 includes a tank main body 10, a screen plate 15 provided inside the tank main body 10 and on which a nickel raw material N is placed, an injection part 21 that sprays a liquid on the nickel raw material N, a chlorine gas supply tube 52 that supplies the chlorine gas to inside of the tank main body 10, and a drain port 18 provided below the screen plate 15 to discharge the generated nickel chloride aqueous solution by overflow. Since the nickel raw material N is covered with a liquid film under a chlorine gas atmosphere, the chlorine gas is easily absorbed into the liquid, and the chlorine leaching reaction of the nickel raw material N is likely to proceed. Therefore, a nickel chloride aqueous solution can be generated with high efficiency.SELECTED DRAWING: Figure 1

The present invention provides a process for preparing a nickel oxide, said nickel oxide comprising nickel and at least one of cobalt and manganese, said process comprising the steps of: i. extracting nickel and at least one of cobalt and manganese form a feed solution; ii. stripping an obtained organic phase with hydrochloric acid, thereby obtaining an aqueous solution comprising, respectively, nickel chloride, cobalt chloride and / or manganese chloride; iii. mixing nickel chloride and at least one of cobalt chloride and manganese chloride obtained in step ii. in a predetermined ratio; iv. hydropyrolysis of the aqueous solution formed in step iii. to afford a nickel oxide comprising nickel and at least one of cobalt and manganese, and gaseous hydrochloric acid; v. separating the gaseous hydrochloric acid formed in step iv. from said nickel oxide formed in step iv.; and vi. recycling the gaseous hydrochloric acid obtained in step v. upstream of said hydropyrolysis in step iv.

To provide an apparatus and a method for producing an aqueous solution of nickel chloride which can suppress leakage of chlorine gas.SOLUTION: There is provided an apparatus for producing an aqueous solution of nickel chloride which comprises a dissolution tank 1 which is maintained at a negative pressure and into which a nickel raw material N is charged, a liquid supply device which supplies a dissolution starting liquid to the dissolution tank 1 and a chlorine gas supply device which supplies chlorine gas to the dissolution tank 1. The nickel raw material N is chlorine leached in the dissolution tank 1 to produce an aqueous solution of nickel chloride. Since the inside of the dissolution tank 1 is maintained at a negative pressure, leakage of chlorine gas from the dissolution tank 1 can be suppressed.SELECTED DRAWING: Figure 2

An aspect of the present invention is to provide a method for preparing a high-concentration nickel-cobalt-manganese composite solution, and another aspect of the present invention is to provide a method for preparing a high-concentration nickel-cobalt-manganese composite salt. In addition, through the method for preparing a nickel-cobalt-manganese composite solution, sodium sulfate inevitably generated during a solvent extraction process can be reduced, and the scale of equipment required for the process can be reduced.

The application discloses a double-coated lithium nickel cobalt manganese oxide, a preparation method thereof, a positive electrode material and a lithium ion battery. The preparation method of the double-coated lithium nickel cobalt manganese oxide comprises the following steps: (1) uniformly mixing nickel acetate and anhydrous ethanol to obtain a solution; adding lithium nickel cobalt manganese oxide into the solution, uniformly dispersing, and then adding an ammonium fluoride aqueous solution to perform a reaction, and drying the obtained precipitate (NiF2) after washing; (2) mixing the dried sample in the step (1) with a carbon source and fully ball milling, and performing a heat treatment after the ball milling, so that the double-coated lithium nickel cobalt manganese oxide is prepared. The method provided by the application can improve the cycle performance of a layered ternary positive electrode material under high-voltage charging and discharging (such as 2.8-4.5 V), and can improve the initial coulomb efficiency, and has the advantages of simple and feasible preparation method and strong universality.

To provide an apparatus and a method for producing an aqueous solution of nickel chloride with a simple apparatus configuration and process and easy operation control.SOLUTION: There is provided an apparatus for producing an aqueous solution of nickel chloride which comprises a dissolution tank 1 having airtightness into which a nickel raw material N is charged, a liquid supply device which supplies a dissolution starting liquid to the dissolution tank 1, a chlorine gas supply device which supplies chlorine gas to the dissolution tank 1, a pressure gauge 22 which measures the pressure of the gas phase in the dissolution tank 1 and a control device. The nickel raw material N is chlorine leached in the dissolution tank 1 to produce an aqueous solution of nickel chloride. The control device adjusts the supply amount of chlorine gas so that the measured value of the pressure gauge 22 is constant. Since the supply amount of chlorine gas is adjusted using the pressure of the gas phase part in the dissolver 1 as an indicator, the supply amount of chlorine gas can be easily controlled.SELECTED DRAWING: Figure 2

The application discloses a kind of perovskite nanocrystals doped with nickel ions and its application in rapid detection of moisture in edible oil, the chemical formula of the perovskite nanocrystals is CsPb (1‑x) Ni x Br3, x represents the molar ratio of nickel ions and lead ions, x=0.05-0.23;The application provides a kind of perovskite nanocrystals doped with nickel ions, nanometer size is uniform, fluorescence signal is enhanced, structure is more stable;The perovskite nanocrystals doped with nickel ions can be dispersed with ethyl acetate as solvent, used for the detection of moisture content in edible oil, solve the problem that existing method uses toxic liquid such as toluene as solvent, improve safety.In addition, the detection method of the application is rapid (can be completed within 10 min), sensitive, accurate, and the detection limit is as low as 0.006% (v / v).

The application discloses a kind of resource processing technology of nickel-containing etching waste liquid, comprising the following steps: S1, pretreatment: adding lye to nickel-containing etching waste liquid to adjust pH to 3.5~4.0, then heated stirring treatment, again, standing aging treatment, obtain containing nickel fluoride turbidity liquid;S2, centrifugal: the centrifugal treatment of containing nickel fluoride turbidity liquid;S3, main reaction: with hot water to clean nickel fluoride by-product, cleaning wastewater is added to the etching waste liquid after pretreatment, then add hydrofluoric acid to adjust the ratio of ammonium fluoride and hydrofluoric acid to 0.9~1.2:1, after reaction, obtain reaction liquid;S4, concentration;S6, centrifugal;S7, drying: ammonium bifluoride crystal is dried to obtain ammonium bifluoride product.The application controls precipitated nickel fluoride by adjusting process conditions, solves the influence of nickel-ammonium complexation on the direction of treating nickel-containing etching waste liquid by precipitation method by pH control, reduces auxiliary material addition and environmental pollution, realizes resource recycling, and reduces production cost.

To provide a method for producing an aqueous solution of nickel chloride capable of maintaining a high dissolution efficiency.SOLUTION: There is provided a method for producing an aqueous solution of nickel chloride which comprises: a raw material charging step of charging a nickel raw material N in a dissolution tank 1 having airtightness; a liquid supply step of supplying a dissolution starting liquid to the dissolution tank 1; a chlorine gas supply step of supplying chlorine gas to the dissolution tank 1; and a raw material recharging step of charging a new nickel raw material N in the dissolution tank 1 when the amount of the nickel raw material N in the dissolver 1 has decreased to the specified amount. Since the new nickel raw material N is charged at the timing when the amount of the nickel raw material N is reduced, the dissolution of the nickel raw material N can be maintained at high efficiency.SELECTED DRAWING: Figure 2

The invention discloses a preparation method of a porous micron metal fluoride composite positive electrode material modified by carbon nanodots and application of the porous micron metal fluoride composite positive electrode material in a lithium ion battery. Taking carbon nanodot modified porous micron ferrous fluoride as an example, the material is prepared through a stepped in-situ synthesis strategy: a three-dimensional porous iron trifluoride skeleton is constructed by combining a liquid phase method with low-temperature calcination, and carbon nanodots are deposited and anchored in an acetylene atmosphere by using a chemical vapor deposition technology. According to the composite structure, the advantage of high volume energy density of a porous micron material is combined with a continuous conductive network constructed by carbon nanodots, and the inherent problems of poor conductivity and slow ion transmission of a traditional metal fluoride material are solved. The process is simple and controllable, a new thought is provided for development of the positive electrode material of the high-performance lithium ion battery, the industrial application potential is achieved, and meanwhile the wide popularization value is achieved in the aspect of synthesis methodology.

To provide a positive electrode active material which is improved in powder physical properties while improving load resistance such as a rate and output resistance in use as a positive electrode active material used for a lithium ion secondary battery, and is manufactured in a short cycle time at low cost.SOLUTION: The positive electrode active material is formed through a first step in which a compound containing one or more elements selected from magnesium, calcium, zirconium, lanthanum, and barium, a compound containing a halogen and an alkali metal, and a fluoride containing one or more metals selected from nickel, aluminum, manganese, titanium, vanadium, iron, and chromium are each pulverized and then mixed with metal oxide powder to form a first mixture, and a second step in which heating is performed at a temperature higher than or equal to 700 °C and lower than or equal to 950 °C.SELECTED DRAWING: Figure 1