82results about "Nickel carbonates" patented technology

The invention provides a method for efficiently synthesizing basic nickel carbonate, and belongs to the technical field of chemical preparation. Comprising the following steps: (1) preparing a mixed solution of sodium carbonate and sodium hydroxide; (2) under low-temperature and high-speed stirring conditions, dropwise adding a nickel salt solution into the mixed solution, adding a competitive adsorbent, adjusting the pH value of the solution, then heating, continuing stirring reaction, separating the competitive adsorbent by a magnet, centrifuging, washing and collecting prepared primary basic nickel carbonate; and (3) recrystallizing the primary basic nickel carbonate in an ethanol water solution, and drying to obtain the basic nickel carbonate. According to the preparation method disclosed by the invention, the content of impurity ions in the product is reduced, so that the high-purity basic nickel carbonate can be prepared, the synthesis efficiency is high, the production cost is relatively low, the method is green and environment-friendly, the competitive adsorbent can also be repeatedly utilized and recycled, the production cost is reduced, and the method has a wide application prospect.

The present invention relates to a process for producing a transition metal carbonate in a continuously operated reactor. In further aspects, the present invention relates to a lithium- and / or sodium-containing transition metal mixed oxide obtainable by this process, as well as the use of an organic additive for producing a transition metal carbonate as a precursor to a lithium- and / or sodium-containing transition metal mixed oxide.

The invention discloses a method for extracting and recovering metal elements in a lithium battery by using a chlorination method, and belongs to the technical field of lithium battery recovery, the method comprises the following steps: step 1, roasting a lithium battery positive plate to remove organic matters, and stripping to remove aluminum foil to obtain electrode material powder; step 2, placing the electrode material powder on a carrier of a Joule heating device, carrying out thermal shock treatment in a chlorine atmosphere, and heating and chlorinating in stages in the treatment process; step 3, desublimating gas generated after chlorination in each stage; and 4, adding the desublimated solid in each stage into deionized water, mixing, adding a sodium carbonate aqueous solution, collecting the precipitate, washing, and drying to obtain a metal salt product. Based on the characteristics that Joule heat can rapidly heat and accurately control the temperature, by combining the difference between the temperature of chlorination reaction of different metal oxides and the gasification temperature of a chlorinated product, staged gasification desublimation treatment is achieved, different metal chlorides are obtained, and accurate and efficient purification is achieved.

The invention discloses a method for extracting and recovering metal elements in lithium batteries using a chlorination method, which belongs to the technical field of lithium battery recovery. The method comprises the following steps: step 1, calcining the positive electrode sheet of the lithium battery to remove organic matter, and peeling off the aluminum foil to obtain electrode material powder; step 2, placing the electrode material powder on a carrier of a Joule heat device, and performing a thermal shock treatment under a chlorine atmosphere, and the treatment process is staged by stage heating and chlorination; step 3, desublimating the gas generated after chlorination in each stage; step 4, adding the solid after desublimation in each stage to deionized water, adding a sodium carbonate aqueous solution after mixing, collecting the precipitate, washing and drying to obtain a metal salt product. The present invention is based on the characteristics of Joule heat that can heat quickly and accurately control the temperature, combined with the difference in the temperature of the chlorination reaction of different metal oxides and the gasification temperature of the chlorination product, to achieve staged gasification and desublimation treatment, obtain different metal chlorides, and purify accurately and efficiently.

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.

Process for removing water from a particulate material selected from (oxy)hydroxides and carbonates containing at least one of nickel or cobalt and at least one metal other than nickel, said process comprising 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, wherein the residual moisture of the resultant product is in the range of from 50 ppm to 1.5% by weight.

The invention provides a composite precursor, a composite positive electrode material, a secondary battery and electric equipment. The composite precursor comprises an inner core and an outer attaching layer arranged on at least part of the surface of the inner core, and the inner core and the outer attaching layer are both metal oxides or substances capable of being decomposed to form the metal oxides. The composite precursor and the active elements are chemically combined through selection of metal elements with different valence states in the inner core and the outer attachment layer, so that the substance of the inner core forms an active element-rich substance, and the substance of the outer attachment layer forms a positive electrode active substance; after the composite precursor is compounded with the active elements, the mole number of the active elements in each mole of the inner core material is larger than that of the active elements in each mole of the outer attachment layer material. The composite precursor can reduce the surface alkalinity of the lithium supplement agent and improve the air stability, so that the first-circle charging specific capacity of the secondary battery is improved.

The utility model relates to the technical field of cobalt-nickel salt extraction and separation, and discloses an efficient cobalt-nickel salt extraction and separation device which comprises a support, an extraction tank is fixedly connected to the middle of the support, a transverse plate is fixedly connected to the upper portion of the extraction tank, a motor is arranged on the rear side of the outer portion of the transverse plate, and the output end of the motor is fixedly connected with a rotating disc. And a fixed rod is fixedly connected to the outer portion of the rotary disc, the fixed rod is sleeved with a reciprocating rod, guide rings are fixedly connected to the two sides of the outer portion of the transverse plate, the reciprocating rod is slidably connected to the interiors of the two guide rings, and a connecting rod is fixedly connected to the lower portion of the reciprocating rod. According to the extraction tank disclosed by the utility model, in the extraction process, the upper and lower different areas in the extraction tank can be conveniently stirred, uniform distribution of materials in the extraction tank is ensured, contact between cobalt and nickel and a leaching agent can be accelerated, and the extraction efficiency is improved while the reaction rate is improved.

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”.

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.

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 invention discloses a mixed solution treatment method and application thereof, and belongs to the technical field of wastewater treatment. In the treatment method provided by the invention, the mixed solution contains at least one of Ni < 2 + >, Co < 2 + > and Mn < 2 + > and Li < + >; the treatment method comprises the following steps: S1, extracting the mixed solution with an organic phase A to obtain a loaded organic phase A and a raffinate phase A; the organic phase A comprises an extraction agent Cyphos IL 104; in the organic phase A, the volume fraction of the extraction agent Cyphos IL 104 is 30%-100%; the pH value of the mixed solution is 6-9. According to the treatment method provided by the invention, the transition metal element and the lithium element in the mixed solution can be respectively recovered, and the recovery rate is very high. The invention further provides application of the treatment method.

A method for recovering materials from waste or scraps through an improved microwave carbothermal process involves combining reagents of a carbothermal reaction to form a mixture to be subjected to heat treatment, the reagents including a component in which an element to be recovered is contained and a carbon-containing component, the component being contained within a waste material, placing the mixture in a crucible, placing the crucible in a refractory chamber having a side wall, a surface of the side wall being covered by a layer of microwave-sensitive material, and inserting the refractory chamber into a microwave oven. The carbothermal reaction is obtained in less time and with lower electricity consumption compared to typical carbothermal reactions.

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.

The present application provides a composite precursor, a composite positive electrode material, a secondary battery, and an electric device. The composite precursor comprises an inner core and an outer adhesion layer arranged on at least part of the surface of the inner core. The inner core and the outer adhesion layer are both made of metal oxides or substances capable of being decomposed to form metal oxides. For the inner core and the outer adhesion layer, by means of selection of metal elements in different valences, the composite precursor is combined with active elements, so that substances of the inner core form active element-rich substances, and substances of the outer adhesion layer form positive electrode active substances. After the composite precursor is combined with the active elements, the number of moles of active elements in per mole of inner core substance is greater than the number of moles of active elements in per mole of outer adhesion layer substance. The composite precursor can reduce the surface alkalinity of a lithium supplementing agent and improves the air stability, thereby improving the first cycle charge specific capacity of the secondary battery.

There is provided method of recovering material from a source material comprising one or more target metals. Also provided is a leach tank for leaching a material from a source material comprising one or more target metals, as well as an apparatus for recovering material from a source material containing one or more target metals. Also described is a system for recovering material from a source material comprising one or more target metals as well as the use of any of the aforementioned to recover material from a source material. A lithium leach solution, a mixed metal precipitate, a composition, a cathode active material, and a graphite material are also described.

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 provides aluminum-zirconium co-doped cobalt carbonate as well as a preparation method and application thereof. The preparation method comprises the following steps: adding a first cobalt-aluminum-zirconium solution and a precipitant solution into a reaction container in a parallel flow manner, and carrying out a first co-precipitation reaction; continuously adding the second cobalt-aluminum-zirconium solution into the first cobalt-aluminum-zirconium solution to obtain a third cobalt-aluminum-zirconium solution, simultaneously adding the third cobalt-aluminum-zirconium solution and the precipitator solution into the reaction container in a parallel flow manner, and carrying out a second coprecipitation reaction to obtain zirconium-aluminum co-doped cobalt carbonate; the concentration of aluminum salt in the first cobalt-aluminum-zirconium solution is smaller than that of aluminum salt in the second cobalt-aluminum-zirconium solution, and the concentration of zirconium salt in the first cobalt-aluminum-zirconium solution is the same as that of zirconium salt in the second cobalt-aluminum-zirconium solution; the feeding flow of the third cobalt-aluminum-zirconium solution is the same as that of the first cobalt-aluminum-zirconium solution. According to the preparation method disclosed by the invention, co-doping of aluminum and zirconium is realized, and the doping amount of aluminum is gradually increased in the cobalt carbonate growth layer, so that the performance of the lithium cobalt oxide positive electrode material under high voltage is improved.

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 invention discloses a basic nickel carbonate sulfate radical deep removal method based on multistage countercurrent washing, and belongs to the technical field of chemical engineering, the method realizes efficient and deep removal of sulfate radical ions in basic nickel carbonate by adding a specific additive, optimizing a multistage countercurrent washing system and adding a washing liquid recycling and refining step, and the method is suitable for industrial production. The problem of high sulfate radical content of basic nickel carbonate in the prior art is effectively solved, the production cost and environmental pollution are reduced while the removal rate of the sulfate radicals is increased, and the method has good economic benefits and social benefits.

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.