32results about "Nickel carbonates" patented technology

Disclosed herein is a process for removing water from a particulate material selected from (oxy)hydroxides and carbonates containing at least one of nickel, cobalt, and at least one metal other than nickel. The process includes the step of introducing at least one particulate material with a water content in the range of from 1 to 30% by weight, referring to said particulate material, into a rotary kiln with external heating elements and moving it through the rotary kiln together with a flow of a gas. The residual moisture of the resultant product is in the range of from 50 ppm to 1.5% by weight.

A method of manufacturing a particulate transition metal carbonate material is described. The method includes mixing a transition metal precursor salt with a second salt in a liquid vehicle. A precipitation reaction is then performed to form a slurry of the particulate transition metal carbonate material in the liquid vehicle. The particulate transition metal carbonate material may find use as seeds in a subsequent precipitation reaction. Methods of manufacturing a particulate precursor materials are also described, including performing a precipitation reaction between one or more transition metal sources in the presence of seed particles in a reaction mixture within a precipitation reaction vessel, to form the particulate precursor material by precipitation onto the surface of the seed particles.

The present invention relates to a process for producing a transition metal carbonate in a continuous reactor. According to other aspects, the present invention relates to a Li-containing and / or Na-containing transition metal mixed oxide, and to the use of an organic additive for producing a transition metal carbonate as a precursor of an Li-containing and / or Na-containing transition metal mixed oxide.

The invention belongs to the field of inorganic functional materials, and particularly relates to a basic nickel carbonate modified material and a preparation method thereof.The method comprises the steps that nickel nitrate hexahydrate is dissolved in deionized water, urea and cetyltrimethylammonium bromide are added, the mixture is heated and stirred mildly, and stirring is performed to obtain a basic nickel carbonate modified material; then adding a specially-made polyaminophenylboronic acid nickel complex and a cobalt-nickel phosphate ethanediamine hybrid material, performing ultrasonic dispersion to form a mixed solution, and then performing hydrothermal reaction, centrifugal washing and vacuum drying to obtain a final product. The two special modified compounds are respectively prepared through a coordination reaction regulated by ammonia water and a hybridization reaction under high-temperature and high-pressure conditions. The modified material prepared by the method has a unique microstructure and enhanced physical and chemical properties, shows excellent application prospects in the fields of electrochemical energy storage, electro-catalytic water and environmental remediation, and particularly, the comprehensive performance of the material is remarkably improved due to the high specific surface area, abundant active sites and a stable structure.

A method for manufacturing a positive-electrode active material precursor for a nonaqueous electrolyte secondary battery containing a nickel-cobalt-manganese carbonate compound includes: an initial aqueous solution preparation process of preparing an initial aqueous solution; a nucleation process of forming nuclei; and a nucleus growth process of growing the nuclei. In the nucleation process, a pH value of the mixed aqueous solution is controlled to be greater than or equal to 8.0 at the reference reaction temperature of 25° C. In the nucleus growth process, the pH value of the mixed aqueous solution is controlled to be greater than or equal to 6.0 and less than or equal to 7.5 at the reference reaction temperature of 25° C. The nucleation process takes a time greater than or equal to 1 / 20 and less than or equal to 3 / 10 of a combined time of the nucleation process and the nucleus growth process.

The method according to the invention comprises: - mixing the reactants of a carbothermal reduction reaction to form a mixture to be subjected to a thermal treatment, the reactants comprising a component (MO) containing the element (M) to be recovered and a carbon-containing component (C), the component (MO) being contained in a waste material; - placing the mixture in a crucible and placing the crucible in a heat-resistant chamber (2) having a side wall (23), the surface of which is coated with a layer (5) of microwave-sensitive material; - placing the heat-resistant chamber (2) in a microwave oven operated at power W for a time T. The innovations of the method include achieving the carbothermal reduction reaction in a shorter time than those presented in the literature (15 minutes versus 60 minutes as tested using a rotary pilot oven) and lower power consumption.

The application provides a seed crystal for carbon dioxide fixation, and a preparation method and application thereof, and belongs to the technical field of environmental protection and water treatment. The seed crystal comprises a carrier material and basic active sites loaded on the carrier material; and the material of the basic active sites comprises one or more of alkali metal oxides and alkaline earth metal oxides. The seed crystal provided by the application can be applied to a seed crystal granulation process, the basic active sites on the surface of the seed crystal can consume a large amount of hydrogen ions, accelerate the dissolution and hydrolysis process of gaseous carbon dioxide, convert the gaseous carbon dioxide into carbonate ions in a high-efficient manner, and then induce metal ions to crystallize on the surface of the seed crystal in the form of carbonate precipitation, so that carbonate granules are formed, and the mineralization and fixation of carbon dioxide and the high-efficient removal and granulation recovery of metal ions in wastewater are simultaneously achieved.

The invention belongs to the technical field of nickel material smelting, and discloses a method for preparing high-purity nickel by synergic circulation of electrodeposited nickel anolyte, which comprises the following steps: performing primary nickel precipitation on a nickel sulfate solution and sodium carbonate, and performing solid-liquid separation to obtain nickel carbonate and primary filtrate; carrying out second-stage nickel precipitation on the first-stage filtrate and sodium hydroxide, and carrying out solid-liquid separation to obtain nickel hydroxide and second-stage filtrate; the method comprises the following steps: performing electrodeposition on nickel carbonate and nickel hydroxide, performing acid dissolution on anolyte to generate a nickel-containing solution, preparing a new cathode solution from the nickel-containing solution, pure water, boric acid, the anolyte and sodium sulfate, and performing electrodeposition to obtain high-purity nickel. The process has remarkable advantages, sodium carbonate is used for primary nickel precipitation, the requirement for large-scale nickel precipitation is met, and the product is easy to filter and low in cost; sodium hydroxide is used for secondary nickel deposition, deep nickel deposition is achieved, the use amount is small, and the defect of difficult filtration is avoided; and the front nickel deposition process can intercept impurities, the impurity removal effect and the separation efficiency are both considered, and the overall production cost is greatly reduced.

The utility model relates to the technical field of nickel carbonate production, in particular to a multifunctional integrated precipitation reactor which comprises a base, two supports which are symmetrically arranged left and right are arranged at the top of the base, a precipitation reaction assembly and a separation drying assembly are arranged between the two supports, and the precipitation reaction assembly comprises a reaction tank. A discharging pipe with a valve is arranged at the bottom end of the reaction tank, the separating and drying assembly comprises a separating and drying box communicated with the discharging pipe, a filtering drawer is detachably connected into the separating and drying box, two electric heating plates are arranged at the top of the inner wall of the separating and drying box, and a liquid outlet pipe with a valve is arranged at the bottom of the separating and drying box. According to the multifunctional integrated precipitation reactor, the reaction tank, the separation drying box and the electric heating plate are integrated in the same equipment, so that continuous operation of nickel carbonate precipitation, solid-liquid separation and drying procedures is realized, and the problems of low efficiency, large occupied space and material energy loss caused by transfer of multiple equipment in a traditional process are thoroughly solved.

A method of manufacturing a particulate precursor material, comprising providing a suspension of seed particles in a liquid vehicle. A precipitation reaction involving one or more transition metal sou

The present application relates to a process for purifying metal salts, and to a process for separating a metal from a polymetallic mixture by crystallizing a metal salt. The processes according to the invention allow obtaining crystallized carbonate-containing metal salts with high purity and high crystallinity.

This invention relates to a process for preparing a mixture comprising at least one valuable metallic compound selected from nickel, manganese, and cobalt hydroxides, from a raw material comprising at least one valuable metallic compound and at least one undesirable metallic compound, the process comprising the following steps: - E1: transformation of at least one valuable metallic compound and at least one undesirable metallic compound into the corresponding chloride complexes in an aqueous solution; - E2: selective separation of at least one undesirable metallic complex from at least one valuable metallic complex to obtain an intermediate solution free of undesirable metal complexes; - E3: addition of a sodium hydroxide solution to the intermediate solution to precipitate at least one valuable metallic complex in the form of the corresponding hydroxide compound in a final solution;and - E4: filtration of the final solution to obtain a powder of at least one valuable metallic hydroxide and a sodium chloride solution. Fig. 1;

A method of manufacturing a particulate transition metal carbonate material is described. The method includes mixing a transition metal precursor salt with a second salt in a liquid vehicle. A precipitation reaction is then performed to form a slurry of the particulate transition metal carbonate material in the liquid vehicle. The particulate transition metal carbonate material may find use as seeds in a subsequent precipitation reaction. Methods of manufacturing a particulate precursor materials are also described, including performing a precipitation reaction between one or more transition metal sources in the presence of seed particles in a reaction mixture within a precipitation reaction vessel, to form the particulate precursor material by precipitation onto the surface of the seed particles.

A method of manufacturing a particulate precursor material, comprising providing a suspension of seed particles in a liquid vehicle. A precipitation reaction involving one or more transition metal sou

The present disclosure provides a production method of a precursor of a positive electrode active material capable of reducing generation of waste. The production method of the precursor of the positive electrode active material of the present disclosure includes: a step of bringing a raw material containing Ni and Co into contact with an aqueous phase containing ammonia and ammonium sulfate to leach Ni and Co into the aqueous phase; a step of removing ammonia from the aqueous phase while recovering the ammonia; a step of dissolving a manganese salt in the aqueous phase from which the ammonia has been removed; and a step of obtaining a carbonate containing Ni, Co, and Mn from the aqueous phase in which the manganese salt is dissolved by using ammonium bicarbonate for crystallization.

The invention discloses a preparation method of basic nickel carbonate in the field of inorganic material preparation. The method comprises the following steps: mixing a nickel sulfate solution and a sodium carbonate solution in a reaction kettle, adding a specific molecular regulating agent, carrying out precipitation reaction at a controlled temperature, aging, filtering, washing and drying to obtain sphere-like basic nickel carbonate with uniform granularity and high purity. The regulating agent is synthesized by the following steps: firstly, protecting hydroxyl of (S)-tert-leucinol by using tert-butyldimethylsilyl chloride; then carrying out Michael addition with 2-(trifluoromethyl) acrylic acid under the action of a basic catalyst; carrying out secondary Michael addition on the obtained product and 2-dodecenoic acid to introduce a hydrophobic long chain; removing a silyl ether protecting group to release hydroxyl; and finally salifying with sodium hydroxide to obtain the target regulating agent. The molecular regulating agent can effectively control the precipitation process through steric hindrance and coordination, significantly improves the particle size distribution and purity of the product, and is simple in preparation process and suitable for industrial production.

The invention discloses a method for recovering and preparing high-purity nickel carbonate and electrodeposited cobalt from waste 3D printing nickel-based superalloy powder, and the method sequentially comprises the following steps: (1) reduction and acid leaching aiming at the characteristics that the waste powder is complex in component and nickel and cobalt are difficult to separate; (2) carrying out hydrolysis coprecipitation to preliminarily remove ferrosilicon; (3) extracting Lix984 to remove copper; (4) deeply removing iron by a sodium jarosite method; (5) P204 extraction and deep impurity removal; (6) extracting and separating nickel and cobalt by using P507; (7) multi-stage oil removal; (8) ion exchange adsorption and impurity removal; (9) nickel precipitation with sodium carbonate; by means of the specific combination of the steps and technological parameter control, efficient selective separation of nickel, cobalt and numerous impurity elements is achieved, high-purity nickel carbonate with the nickel content larger than or equal to 45 wt% and the single impurity content smaller than or equal to 10 ppm and electrodeposited cobalt meeting the Co9995 standard in YS / T 255-2009 can be directly prepared from complex waste powder, and the nickel recovery rate and the cobalt recovery rate are both larger than 98%. The method is compact in technological process, high in recovery rate and high in product added value.

A method of manufacturing a particulate transition metal carbonate material. A transition metal precursor salt in a liquid vehicle is mixed with a carbonate salt and / or a bicarbonate salt, and a preci

The present invention relates to a method for selectively capturing chemical elements from a multi-metal liquid sample.

This invention belongs to the field of nickel smelting technology and discloses a method for preparing high-purity nickel through electrowinning and synergistic recycling of nickel anolyte. The method includes: firstly, a nickel sulfate solution undergoes primary nickel precipitation with sodium carbonate, followed by solid-liquid separation to obtain nickel carbonate and a primary filtrate; secondly, the primary filtrate undergoes secondary nickel precipitation with sodium hydroxide, followed by solid-liquid separation to obtain nickel hydroxide and a secondary filtrate; the nickel carbonate and nickel hydroxide are then dissolved in the anolyte after electrowinning to generate a nickel-containing solution, which is then mixed with pure water, boric acid, anolyte, and sodium sulfate to prepare a new cathode solution, which is then electrowinning to obtain high-purity nickel. This process has significant advantages: the primary nickel precipitation uses sodium carbonate, which is suitable for large-scale nickel precipitation needs, and the product is easy to filter and inexpensive; the secondary nickel precipitation uses sodium hydroxide, achieving deep nickel precipitation with a small dosage, avoiding the difficulty in filtration; the pre-precipitation nickel precipitation process can intercept impurities, balancing impurity removal and separation efficiency, and significantly reducing overall production costs.

This invention discloses a low-water-consumption washing method for spherical nickel carbonate, belonging to the field of inorganic chemical material preparation technology. It solves the problems of high water consumption and long washing cycles in existing spherical nickel carbonate washing methods. The steps of this invention are as follows: Spherical nickel carbonate slurry is added to an aging tank, and the pH value of the slurry is adjusted to 9.0. After aging, the mixed slurry is transferred to a centrifuge to remove the mother liquor. Then, an alkaline solution is added to the centrifuge for pre-washing. Pure water is added, and the pre-washed slurry is repeatedly washed with pure water. After washing, the centrifuge is started for high-speed spin-drying. This washing operation is repeated 3-4 times, and finally, the spherical nickel carbonate is obtained after drying. This invention is convenient to operate and environmentally friendly. Through the process of pre-washing with dilute alkaline water + multi-stage washing with pure water, the production efficiency of spherical nickel carbonate is improved while significantly reducing water waste, making it suitable for large-scale application.

This invention belongs to the field of metal ion separation technology, specifically disclosing a method for separating mixed sulfates. In the mixed sulfate separation method provided by this invention, the mixed sulfate is Ni-containing... 2+ Co 2+ Cu 2+ Or Li + K + Na + The specific steps of this invention for obtaining mixed sulfate solutions include: adding a salt phase building agent to the mixed sulfate solution and adjusting the pH to 4-5.5 to obtain a salt phase; mixing the salt phase with an oil phase and a polymer phase to generate a three-phase coexistence system; allowing the phases to separate by standing, and then adjusting the pH to 6-7.5 and allowing it to stand again to obtain a Cu- or Na-rich polymer phase, a Co- or K-rich oil phase, and a Ni- or Li-rich salt phase. This invention utilizes a combination of "multiple driving forces synergistic enhancement, cation-directed selection, and segmented acidity control" to achieve efficient and simultaneous separation of multiple metal ions in sulfate solutions containing nickel, cobalt, copper, lithium, sodium, or potassium.

Disclosed are an aluminum-coated precursor and a preparation method therefor. The aluminum coated precursor has a chemical formula of xMCO3(1-x)·Al(OH)3, wherein M is at least one of nickel, cobalt and manganese, and x is 0.995-0.999. The aluminum-coated precursor has the advantages of a controllable particle size and uniform particle size distribution, a high degree of sphericity, a smooth particle surface, a high tap density, not easily breaking, and an excellent electrochemical performance and energy density.

The present application relates to a process for purifying metal salts, and to a process for separating a metal from a polymetallic mixture by crystallizing a metal salt. The processes according to the invention allow obtaining crystallized carbonate-containing metal salts with high purity and high crystallinity.

Provided in the present invention is a manganese-based carbonate precursor of a positive electrode material for a secondary battery. In the manganese-based carbonate precursor that has a specific structure and composition and contains a trace amount of uniformly distributed Na element, a content of Na is in a range of 0.5-3 mol%, which range can ensure that the structural integrity and consistency of carbonate crystals are not affected. In addition, the trace amount of Na element is uniformly distributed inside the manganese-based carbonate precursor provided in the present invention, and by means of simple mixing with a lithium source and sintering, a lithium-rich manganese-based material uniformly doped with Na element can be directly obtained without the need for introducing other Na source, whereby uneven doping of Na is effectively avoided, the doping effect is improved, and the electrical properties of the material are significantly improved, without a significant increase in the production cost at the same time. The precursor has a high primary particle crystallinity degree, and a good crystal structure. The lithium-rich manganese-based positive electrode material containing a trace amount of Na element provided in the present invention effectively improves the initial charging-discharging coulombic efficiency, the first-cycle discharge capacity, an average voltage, and the energy efficiency.

The invention relates to a process for separating chemical elements from a polymetallic solid sample, such as a sample originating from end-of-life batteries. The process comprises a step of recovering nickel and / or cobalt in a solid form after contacting the sample with ammonium carbonate and a reducing agent. The process comprises a further step of recovering manganese in a solid form after contacting the sample with ammonium carbonate.

The application discloses a carbonate precursor, a high-nickel single-crystal positive electrode material and a preparation method thereof, and relates to the technical field of lithium ion battery positive electrode materials. The preparation method of the high-nickel single-crystal positive electrode material comprises the following steps: mixing a carbonate precursor with lithium hydroxide and strontium carbonate after sintering; sintering the mixed material under a pure oxygen atmosphere, and naturally cooling after sintering; performing airflow crushing to obtain an intermediate product; uniformly mixing the intermediate product with cobalt hydroxide, titanium dioxide and lithium hydroxide; sintering under a pure oxygen atmosphere, and naturally cooling after sintering. The high-nickel single-crystal positive electrode material is obtained. Beneficial effects: the high specific surface area precursor is prepared by a urea pyrolysis method, and then the high-porosity precursor is obtained after pre-sintering, so that the high-temperature sintering temperature of the high-nickel single-crystal ternary material can be obviously reduced, the disproportionation reaction of trivalent nickel can be effectively reduced, and the prepared high-nickel single-crystal positive electrode material has the characteristics of large primary particles, smooth surface and high specific capacity.

The invention belongs to the technical field of inorganic carbonate preparation, and particularly relates to a preparation method of basic nickel carbonate and a mother liquor circulation desulfurization system. Nickel salt, carbonate and a regulating agent are subjected to a precipitation reaction to prepare basic nickel carbonate, the regulating agent has hydrophilic hydroxyl and carboxylic acid groups and has hydrophobic long aliphatic chains, trifluoromethyl and large-steric-hindrance tert-butyl, and after the nickel salt and carbonate react to generate the basic nickel carbonate, the basic nickel carbonate is subjected to a precipitation reaction to prepare the nickel carbonate with the hydrophobic long aliphatic chains, trifluoromethyl and large-steric-hindrance tert-butyl. The regulating agent can be adsorbed on the surface of the basic nickel carbonate precipitate through electrostatic interaction, intermolecular force and the like, and hinders the agglomeration of the basic nickel carbonate precipitate and reduces the adhesion speed of the basic nickel carbonate precipitate through a steric hindrance effect, so that the particle size of the basic nickel carbonate precipitate is controlled within a certain range, and the particle size uniformity of the basic nickel carbonate precipitate is improved; and the regulating agent prevents impurity elements in a liquid phase from entering the formed basic nickel carbonate precipitate through a coordination effect, a steric hindrance effect and the like, so that the purity of the basic nickel carbonate is improved.

The utility model discloses a reaction kettle for nickel carbonate production, which belongs to the technical field of reaction kettles and comprises a reaction kettle body, a uniform stirring component is fixedly mounted in the middle of the lower surface of the reaction kettle body, a vibration component is fixedly connected in the reaction kettle body, and a rolling component is fixedly connected in the middle of the upper surface of the reaction kettle body. By arranging the rolling assembly, the distance between the pressing rod and the sieve tray can be adjusted by the air cylinder, so that the rolling pressure is adjusted, the situation that the crystal structure of nickel carbonate is damaged by excessive rolling, the activity is reduced, and the chemical reaction activity and the catalytic efficiency of the nickel carbonate are influenced is avoided, and by arranging the stirring assembly and the vibration assembly, the hardness of the memory spring is controlled by the heating plate. The sieve tray can be controlled to be in a fixed position or in an up-down shaking state, so that the sieve tray can be conveniently rolled by the pressing rod, or vibration is generated in the process that the sieve tray is driven by the rotating rod to rotate, nickel carbonate above the sieve tray can uniformly enter the reaction kettle body, and the sieve tray can be prevented from being blocked.