43results about "Nickel carbonates" patented technology

The invention discloses a method for preparing low-sulfate basic nickel carbonate, and belongs to the technical field of chemical engineering, a three-stage grading washing process is designed through precipitant selection and grading washing processes, each stage of washing has specific purposes and conditions, and particularly, ammonium sulfate and residual sulfate radicals are subjected to competitive reaction in secondary washing, so that the low-sulfate basic nickel carbonate is prepared. The method effectively solves the problem of high sulfate radical content of basic nickel carbonate in the prior art, improves the purity and performance of the product, and has the advantages of simple operation, low cost and the like. The process method has good application prospects and market value and is expected to be widely applied to the field of chemical material preparation.

The present disclosure relates to double layered hydroxide-type compounds comprising both di- and tri-valent nickel ions, and the use of such compounds in electrodes for energy storage device in addition to a previously developed electrode using Fe2+ and Fe3+“green rusts related compounds”.

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 invention belongs to the technical field of electrocatalysis, and particularly relates to a preparation method and application of a high-purity amorphous nickel hydrogen carbonate electrocatalyst. In order to develop the amorphous Ni-based catalyst which has the characteristics of high purity, stable structure and easiness in large-scale preparation and can maintain efficient catalytic performance under high current density, the high-purity amorphous nickel hydrogen carbonate catalyst is prepared by utilizing a low-temperature coprecipitation method, and the catalyst is stable in structure, shows high activity and ultrahigh stability in an OER test, and is suitable for industrial production. The method is suitable for efficient oxygen evolution reaction under the conditions of high-concentration alkali liquor and large current density, and the process of large-scale practical application of the Ni-based catalyst is greatly promoted. Meanwhile, the method has the advantages of simple process, cheap and easily available raw materials, mild preparation conditions and no need of high-temperature calcination or special atmosphere treatment, and is suitable for industrial-grade large-scale preparation.

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 invention provides a method for recycling a waste lithium ion battery positive electrode material through carbon dioxide laser thermal irradiation, and relates to the technical field of lithium ion battery recycling. The method for recycling the positive electrode material of the waste lithium ion battery through carbon dioxide laser thermal irradiation comprises the following steps: paving and fixing a positive electrode plate of the waste lithium ion battery on a glass plate, and scanning the positive electrode plate by adopting carbon dioxide laser; and after laser irradiation, active substances on the positive plate of the waste lithium ion battery are separated from the current collector aluminum foil. The collected active substances are ground and then dispersed in a low-concentration acid solution to be leached, and then a solution containing Li < + >, Co < 2 + >, Ni < 2 + > and Mn < 2 + > is obtained. The technical effects of improving the metal recovery efficiency and reducing the environmental pollution can be achieved by treating the waste positive plate through laser irradiation.

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.

Simple, material-efficient microgranulation methods are disclosed for aggregating precursor particles into larger product particles with improved properties and, in some instances, novel structures. The product particles are useful in applications requiring uniform, smooth, spherical, or rounded particles such as for electrode materials in lithium batteries and other applications.

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.

Processes are provided in which successive steps of hydrometallurgical value extraction may be carried out using the products of carbon capture and an electrolytic reagent-generating process. The electrolytic process provides an acid leachant and an alkali hydroxide, with the alkali hydroxide then available for use either directly as a precipitant in the hydrometallurgical steps, or available for conversion by carbon capture to an alkali metal carbonate that can in turn be used as the precipitant in the selective hydrometallurgical steps.

A method for preparing an aqueous solution containing nickel or cobalt comprises: (A) a leaching step, comprising a first atmospheric pressure heating leaching step and a second atmospheric pressure heating leaching step, wherein a raw material is heated and leached at atmospheric pressure to form a leaching solution containing nickel, cobalt and impurities; (B) a first extraction step, wherein a first solvent extractant is added to the leaching solution to separate the leaching solution into a first filtrate containing nickel and impurities and a first organic layer containing cobalt and impurities; (C-i) a precipitation removal step, wherein a precipitant is added to the first filtrate to precipitate and remove impurities including magnesium, calcium, or a mixture thereof; and (D-i) a target material precipitation step, wherein a neutralizing agent is added to the first filtrate to selectively precipitate a nickel cake containing nickel.

A lithium nickel manganese cobalt oxide particle is described, in which aluminium is uniformly distributed through the bulk of the particle. A material comprising a plurality of the particles is also described. The material is useful as an electrode material, in particular as a cathode material within an electrochemical cell or battery. A method of manufacturing the particle is also described.