156results about "Nickel carbonates" patented technology

Stable supply of a cathode material for a lithium secondary battery that exels in sinterbility and composition stability and can exhibit satisfactory battery performance is accomplished by reducing to 100 ppm or less both the contents of Na and S being impurity elements in multiple oxides as materials for a cathode material for a lithium secondary battery and carbonic salts as precursor materials for the production of a cathode material for a lithium secondary battery.

The invention relates to a method for recycling copper, nickel, chromium, zinc and iron from plating sludge, belonging to the technical field of chemical engineering and metallurgy. The method comprises the following steps: acid leaching, vulcanizing for separation and enrichment, hot-pressure leaching, extracting for separation, hot-press oxidizing chromium, purifying chromium solution, extracting ferric chloride and the like. The method has obvious advantages of strong adaptability to different kinds of plating sludge, high utilization of metal resources, high value-added content of product,less process waste residue, thorough deintoxication and the like.

The invention provides a process for production of fine spherical particles of a carbonate or a hydroxide of nickel, cobalt or copper which comprises: dissolving a carbonate or a hydroxide of nickel, cobalt or copper having the general formula (I)wherein M represents Ni, Co or Cu, and x and y are numerals satisfying the followings: 0<=x<=2, 0<=y<=2 and x+y=2, in aqueous ammonia, converting the resulting solution to a W/O emulsion containing droplets of the solution in a non-aqueous medium, and then removing volatile components including ammonia from within the droplets, thereby precipitating a basic carbonate or a hydroxide of a metal selected from nickel, cobalt and copperin the droplets.The fine spherical particles of a carbonate or a hydroxide of nickel, cobalt or copper obtained according to the process of the invention are especially useful as a precursor for the manufacture of uniform, fine spherical particles of nickel, copper or cobalt metal, as well as useful as themselves as a catalyst for use in organic synthesis, a carrier, a pigment, a filler or a glaze.

Nickel-metal-containing solids for use in manufacturing nickel metal complexes are disclosed. The nickel-metal-containing solids are made by reducing basic nickel carbonates. By varying the molar ratios of carbonates and bicarbonates to nickel salts, the methods provide basic nickel carbonates that produce superior nickel metal-containing solids that react more effectively with phosphorous-containing ligands. The phosphorous containing ligands can be both monodentate and bidentate phosphorous-containing ligands.

The invention discloses a manufacturing method of electron-grade nickel carbonate through sedimenting sodium carbonate, which is characterized by the following: adopting soluble nickel salt as nickel source and sodium carbonate as sediment; co-flowing nickel salt solution and sodium carbonate solution; controlling pH value, temperature and aging condition; washing; drying; washing again; drying again; grinding into product.

The present invention provides a nickel atom-, manganese atom- and cobalt atom-containing composite carbonate that is high in specific surface area and large in tap density, and useful as a raw material for producing a lithium nickel manganese cobalt composite oxide to be used in a positive electrode active material for use in a lithium secondary battery, and provides a method for industrially advantageously producing the composite carbonate. The composite carbonate includes nickel atoms, manganese atoms and cobalt atoms, and has an average particle size of 5 μm or more and less than 20 μm, a BET specific surface area of 40 to 80 m²/g and a tap density of 1.7 g/ml or more.

The invention discloses a process for rapidly producing basic nickel carbonate or basic cobaltous carbonate, comprising the following steps of: dissolving, synthetizing, filtering, water scrubbing and drying. The dissolving proportion by weight of nickel chloride or cobalt chloride in the dissolving process is NiCl2:H2O=1:4-8, CoCl2:H2O=1:4-8, and the dissolving proportion by weight of sodium carbonate is Na2CO3:H2O=1:4-8. Aqueous alkali and a nickel chloride or cobalt chloride solution are added by adopting a spray mode in the synthetic process. The synthetic reaction time is 2-4 hours. The invention not only has simple process, short production cycle, low labor intensity and arbitrary enlargement of production scale but also has simple and practicable operation, low cost, stable quality and high efficiency. The process has the characteristics of fast production, high quality of products and high efficiency; products can be turned out after water scrubbing at one time, and therefore, electricity, water, labor and time are saved. The products have even and superfine granules without crushing and sieving, thereby being beneficial to application.

The invention discloses a method for preparing a supercapacitor electrode material basic nickel-cobalt carbonate through a hydrothermal method. The method comprises the following steps that metal nickel salt and/or metal cobalt salt and urea are weighed separately and mixed with deionized water, and stirring is performed so that solids can be dissolved to obtain a mixed solution; the mixed solution is poured into a high-pressure reactor, sealing is performed for performing a reaction for 10-16 h under the temperature of 80-110 DEG C, and a reaction product is obtained; the reaction product is separated, washed and dried to obtain basic nickel-cobalt carbonate. According to the method for preparing the supercapacitor electrode material basic nickel-cobalt carbonate through the hydrothermal method, on the basis of control over raw material compatibility and reaction conditions, the three-dimensional porous structure and morphology can be obtained, sufficient wetting and permeation of an electrolyte are promoted, the superficial area of active substances is sufficiently utilized, and the electrochemical performance is improved.

The present invention discloses a process for synthesis of basic nickel carbonate from a diacidic base, according to the process, a sodium carbonate and sodium hydroxide mixed diacidic base is used for precipitation reaction with a soluble nickel salt, the reaction is one-step room temperature reaction, operation is easy, the base dosage is reduced by 20 to 30% compared with a pure soda base synthesis process, the environment is not polluted, and Na in the obtained basic nickel carbonate product (containing 40% of Ni) can be 100ppm or less.

The invention discloses a method for preparing spherical carbonate serving as a cell fuel precursor. At present, the preparation of a nickel-cobalt lithium manganate anode material mainly adopts a co-precipitation method, and the obtained materials are generally irregular granules with low practical value. The method is characterized by comprising the following steps of: taking tail ammonium chloride solution as reaction base solution, adding metal chlorate solution and ammonium carbonate into the base solution at the same time with stirring to produce precipitation reaction at the temperature of between 40 and 80 DEG C, ensuring that the pH value of the solution at the end point is between 7.0 and 7.5, preserving heat and ageing the solution, and washing and drying the obtained slurry to obtain a spherical carbonate product, wherein the metal chlorate solution is one or mixture of cobalt chloride, nickel chloride and manganese chloride, and the concentration of the ammonium chloride is 10 to 30 grams per liter. The tail solution is used as the base solution, and the pH value of the solution at the end point is between 7.0 and 7.5 by using the liquid-phase precipitation method so that the spherical carbonate product with large grain diameter is obtained and all indexes are excellent.

The invention relates to a method for preparing nano nickel bicarbonate, which comprises the following steps of: adding water into urea or urotropine for dissolving, adding nickel salt or nickel hydroxide and stirring, wherein the mole ratio of the urea or the urotropine to nickel is 1:1-16:1, and the concentration of the nickel salt in solution is 0.1-1.0mol/L; shifting the obtained solution into a hydrothermal reactor; after reacting at 90-240 DEG C for 1-96 hours, cooling; and filtering obtained reaction mixed liquid, washing with distilled water and anhydrous ethanol and placing in a vacuum drying box at 60 DEG C for drying to obtain a cubic phase nano nickel bicarbonate square block with the size of 100nm or so. The invention uses the urotropine or the urea as a precipitator, NH3 andCO2 generated by the precipitator dissolve nickel hydroxide, and the pure cubic phase Ni(HCO3)2 nano crystal is prepared finally.

The invention discloses a method for preparing a spherical nickel-manganese-cobalt carbonate ternary precursor, which comprises the following steps of: continuously adding nickel-manganese-cobalt metal salt mixed solution of certain concentration and precipitant into reaction equipment, controlling the pH of the reaction system to be between 6.5 and 7.5, controlling the alkalinity at 5 to 40g/L, controlling the solid content of the slurry at 70 to 130g/L, and aging, washing and drying the slurry to obtain the spherical nickel-manganese-cobalt carbonate ternary precursor. The prepared spherical nickel-manganese-cobalt carbonate ternary precursor granules are relatively uniform, have good spherical degree, smooth spherical surface, good liquidity and controllable size, and are suitable for industrialized continuous production.

The invention relates to a method for continuously synthesizing nickel carbonate, which is characterized by comprising the synthesizing processes: adding and combining a nickel sulfate solution with the concentration of nickel ions from 50 g/l to 55 g/l and a sodium carbonate solution with the concentration from 120 g/l to 125 g/l into a synthesizing kettle according to a flow rate of 1 to 1.2:1, and controlling the pH value of a synthesizing process to be 8.3-8.6 to synthesize the nickel carbonate. The method strictly controls the adding rate of the two raw solutions and the pH values, effectively solves the problems in the prior art that because the excess sodium carbonate solution is added, more local complex salts (Ni1-x/2-y/2Nax(CO3)1-a-b/2(SO4)a(OH)b are generated, the impurity content of the prepared nickel carbonate is higher, the impurities, such as sodium, chlorine, and the like are not easy to be removed in a washing process, thereby effectively improving the product quality of the nickel carbonate, and meeting the requirements of electronic-grade nickel protoxide production and electronic industry.

A process for the recovery of nickel and cobalt from a nickeliferous oxidic ore by heap leaching and/or atmospheric agitation leaching, the process including the steps of: mixing a sulfur containing reductant selected from reductants that do not include copper into a nickeliferous oxidic ore; leaching the reductant/ore mixture with an acidic leach reagent to produce a pregnant leach solution including nickel, cobalt, iron substantially in a ferrous form and other acid soluble impurities; and recovering the nickel and cobalt from the pregnant leach solution.

The present invention relates to a method of precipitation of metal ions. Mineral(s), oxide(s), hydroxide(s) of magnesium and/or calcium are adopted as raw materials, and the raw material(s) is processed through at least one step of calcination, slaking, or carbonization to produce aqueous solution(s) of magnesium bicarbonate and/or calcium bicarbonate, and then the solution(s) is used as precipitant(s) to deposit rare earth, such as nickel, cobalt, iron, aluminum, gallium, indium, manganese, cadmium, zirconium, hafnium, strontium, barium, copper and zinc ions. And at least one of metal carbonates, hydroxides or basic carbonates is obtained, or furthermore the obtained products are calcined to produce metal oxides. The invention takes the cheap calcium and/or magnesium minerals or their oxides, hydroxides with low purity as raw materials to instead common precipitants such as ammonium bicarbonate and sodium carbonate etc. The calcium, magnesium, carbon dioxide etc are efficiently and circularly used, and the environment pollution by ammonium-nitrogen wastewater, high concentration salts wastewater is avoided, and both of the discharge of greenhouse gas carbon dioxide and the production cost of metal are decreased.

The invention provides a method for respectively extracting and using inorganic matters in sludge, and belongs to the technical field of sludge treatment. The method comprises the following steps: (1) pretreating the sludge; (2) extracting inorganic salt from a sludge solution subjected to pretreatment; (3) adding a precipitant a1 into the inorganic salt extracting solution obtained in the step (2) till precipitates are separated, and forming inorganic salt A1 for recycling; (4) adding a precipitant a2 into precipitate-removed supernate in the step (3) till precipitates are separated, and forming inorganic salt A2 for recycling; (5) by parity of reasoning, adding a precipitant an into the precipitate-removed supernate in the former step till precipitates are separated, forming inorganic salt An for recycling. According to the method, the inorganic matters in the sludge are respectively recycled, so that weight reduction for the sludge is realized, and resource utilization of the sludge is also realized; the method is simple in process, high in applicability, simple and convenient to operate, easy to control, low in operating cost, good in treatment effect, wide in application range and easy to popularize and use.

A novel process for complete utilization of olivine is based on purification of brine by oxidation and precipitation of iron and nickel compound.

The invention provides a preparation method of a graphene/nickel bicarbonate nanometer cubic three-dimensional composite material. The preparation method comprises the following steps: preparation ofgraphene oxide hydrosol: preparing graphene oxide with a Hummer' s method, and preparing the graphene oxide hydrosol from the prepared graphene oxide; adding urea into the prepared graphene oxide hydrosol, stirring uniformly, and slowly adding nickel acetate to obtain a precursor solution; transferring the precursor solution into a reaction kettle, placing the reaction kettle into a drying oven, and reacting at a constant temperature for a certain period of time to obtain graphene/nickel bicarbonate aerogel; performing vacuum freeze drying on the obtained graphene/nickel bicarbonate aerogel toobtain the graphene/nickel bicarbonate nanometer cubic three-dimensional composite material. The prepared graphene/nickel bicarbonate nanometer cubic three-dimensional composite material is applied to power lithium batteries and super batteries as an electrode material, and has excellent electric performance. The preparation method provided by the invention has the advantages of simple reaction process, easiness in operation, low cost, energy saving and environmental friendliness, and is suitable for industrial application.

A method for producing a M-carbonate precursor of a Li-M oxide cathode material in a continuous reactor, wherein M=NixMnyCozAn, A being a dopant, with x>0, y>0, 0≦z≦0.35, 0≦n≦0.02 and x+y+z+n=1, the method comprising the steps of: —providing a feed solution comprising Ni-, Mn-, Co- and A-ions, and having a molar metal content M″ feed, —providing an ionic solution comprising either one or both of a carbonate and a bicarbonate solution, the ionic solution further comprising either one or both of Na- and K-ions, —providing a slurry comprising seeds comprising M′-ions and having a molar metal content M′ seeds, wherein M′=Nix′Mny′Coz′A′n′, A′ being a dopant, with 0≦x′≦1, 0≦y′≦1, 0≦z′≦1, 0≦n′≦1 and x′+y′+z′+n′=1, and wherein the molar ratio M′ seeds/M″ feed is between 0.001 and 0.1, —mixing the feed solution, the ionic solution and the slurry in the reactor, thereby obtaining a reactive liquid mixture, —precipitating a carbonate onto the seeds in the reactive liquid mixture, thereby obtaining a reacted liquid mixture and the M-carbonate precursor, and —separating the M-carbonate precursor from the reacted liquid mixture.

The invention provides a system for preparing specific sized particles, the system comprising a continuous stir tank reactor adapted to receive reactants; a centrifugal dispenser positioned downstream from the reactor and in fluid communication with the reactor; a particle separator positioned downstream of the dispenser; and a solution stream return conduit positioned between the separator and the reactor. Also provided is a method for preparing specific sized particles, the method comprising introducing reagent into a continuous stir reaction tank and allowing the reagents to react to produce product liquor containing particles; contacting the liquor particles with a centrifugal force for a time sufficient to generate particles of a predetermined size and morphology; and returning unused reagents and particles of a non-predetermined size to the tank.

The invention discloses a method for extracting and preparing nickel carbonate, nickel sulfate and red ferric oxide from serpentine and tailings thereof. The serpentine and tailings thereof are used as raw materials. The method comprises the following unit processes of: pre-treating; performing acid leaching; performing fractional precipitation; performing ammonia leaching; acidifying; preparing nickel carbonate; preparing nickel sulfate; and calcining. According to the method, useful components such as nickel and iron in the serpentine can be fully and effectively utilized, products such as nickel carbonate, nickel sulfate and red ferric oxide with tight market demand can be produced, and higher nickel and iron recovery rate can be obtained. The purity of the nickel carbonate is 47.93 percent in terms of nickel and the yield is 90.10 percent; the purity of the nickel sulfate is 22.12 percent in terms of nickel and the yield is 85.73 percent; and the purity of the red ferric oxide is 92.40 percent in terms of Fe2O3 and the yield is 92.94 percent.

The invention relates to a method for continuous production of nickel carbonate with low water and energy consumption and reduced emission and a device thereof. The method comprises the following steps of: adding 40-120 g/L nickel salt solution and 10-60 g/L carbonate solution into a vessel at a ratio of 1:(1-3); allowing reaction at 50-90 DEG C, pH of 7-9 and stirring speed of 100-180 rpm; allowing the reaction product to overflow into a 1<#> storage tank, aging at 60-80 DEG C for 1-3 hours, stirring with a gas pump, introducing the reaction product into a 2<#> storage tank, standing for 1-2 hours, and pumping the 15-80 g/L supernatant to a 1<#>press filter; pumping water from a 3<#> storage tank to the 2<#> storage tank, stirring with the gas pump, standing, shaking for 1-2 hours, pumping the supernatant into the 1<#>press filter, collecting filtrate, and preparing into Na2SO4; and pumping the supernatant in the 2<#> storage tank to a 2 <#>press filter when the concentrating thereof is lower than 15-20 g/L, washing the filter cake until no SO4<2+> exists , and oven-drying. The recovered washing water can be recycled, so as to save water consumption by above 55.6%, the washing time is shortened by over 50%, and the waster discharge amount is reduced by 80-90%.