-
公开(公告)号：US12119464B2
公开(公告)日：2024-10-15
申请号：US18507242
申请日：2023-11-13
发明人： Dean Pan , Xiaoguang Zhang , Yifan Wang , Qijun Zhang , Wei Wang
摘要： The present invention provides a method for preferentially recovering manganese from waste lithium-rich manganese-based cathode material, the method comprising: step 1) calcination and leaching: mixing the waste lithium-rich manganese-based cathode material with ammonium sulfate and then performing low-temperature calcination, leaching the calcination product with water, and then performing solid-solution separation to obtain a leaching solution; step 2) complexing and manganese separating: adding ammonium sulfite to the leaching solution obtained in step 1) for a complex reaction to obtain manganese-rich residue; step 3) oxidation leaching: adding an oxidant to the manganese-rich residue obtained in step 2) to perform oxidation leaching, and adjusting the pH of the solution to obtain a manganese-rich solution; and step 4) extracting and stripping. The method realizes the preferential and productive recovering of manganese from waste lithium-rich manganese-based cathode materials, avoids the negative impact of polymetals in the conventional recovery process, and has economic and environmental benefits.
-
公开(公告)号：US20240274913A1
公开(公告)日：2024-08-15
申请号：US18559058
申请日：2022-08-24
申请人： GUANGDONG BRUNP RECYCLING TECHNOLOGY CO., LTD. , HUNAN BRUNP RECYCLING TECHNOLOGY CO., LTD. , YICHANG BRUNP CONTEMPORARY AMPEREX CO., LTD.
发明人： Yingsheng ZHONG , Haijun YU , Yinghao XIE , Aixia LI , Bo LI , Changdong LI
IPC分类号： H01M10/54 , C22B1/248 , C22B3/00 , C22B3/08 , C22B3/16 , C22B3/22 , C22B7/00 , C22B15/00 , C22B21/00 , C22B26/12
CPC分类号： H01M10/54 , C22B1/248 , C22B3/08 , C22B3/165 , C22B3/22 , C22B7/007 , C22B15/0004 , C22B15/0071 , C22B15/0089 , C22B21/0007 , C22B21/0023 , C22B23/043 , C22B23/0453 , C22B26/12
摘要： Disclosed is a method for recovering a waste lithium cobalt oxide battery, the method comprising: feeding a lithium cobalt oxide battery black powder in a column-shaped container, adding a first acid to the column-shaped container for heat leaching until solids in the column-shaped container are not reduced any more so as to obtain a first leachate and leaching residues, wherein the first acid is a weak acid, and a filtering structure is arranged at the bottom of the column-shaped container; and adding a second acid to the column-shaped container containing the leaching residues for heat leaching until solids in the column-shaped container are not reduced any more so as to obtain a second leachate and graphite, wherein the second acid is a strong acid. According to the present invention, consumption of an inorganic strong acid can be reduced, emission of strong acid gas is reduced, and green and low-carbon heat leaching of the black powder is achieved.
-
公开(公告)号：US20240271249A1
公开(公告)日：2024-08-15
申请号：US18105514
申请日：2023-02-03
CPC分类号： C22B15/0071 , C22B3/08 , C22B3/18
摘要： A method of heap leaching a metal from a mined ore that contains a metal sulfide-containing material, such as a copper sulfide-containing mineral. The method forms a heap of the mined ore or extends an existing heap by adding the mined ore to the heap. The method also leaches the metal from the mined ore in the heap with an acidic leach liquor and produces a pregnant leach liquor containing the metal in solution. Pyrite that is already in the mined ore generates acid and heat that facilitates leaching metal from the mined ore. The mined ore may be run-of-mine (ROM) ore that is transferred directly from the mine to the heap without changing the size of ore particles in the mined ore.
-
公开(公告)号：US20240271247A1
公开(公告)日：2024-08-15
申请号：US18407664
申请日：2024-01-09
发明人： Nien-Hwa Linda Wang , Hoon Choi , David Harvey
IPC分类号： C22B7/00 , C01B33/14 , C01B33/26 , C01B33/32 , C01D13/00 , C01F7/0693 , C01F11/02 , C01F11/24 , C01F17/271 , C01G49/02 , C01G49/06 , C01G49/10 , C22B3/06 , C22B3/08 , C22B3/10 , C22B3/42 , C22B3/44 , C22B7/02 , C22B21/00 , C22B59/00
CPC分类号： C22B7/007 , C01B33/14 , C01B33/26 , C01B33/32 , C01F7/0693 , C01F11/02 , C01F11/24 , C01F17/271 , C01G49/02 , C01G49/06 , C01G49/10 , C22B3/065 , C22B3/08 , C22B3/10 , C22B3/42 , C22B3/44 , C22B7/02 , C22B21/0023 , C22B59/00 , C01D13/00
摘要： A process disclosed herein is related to the isolation and purification of substantially pure chemicals, including silica gel, sodium silicate, aluminum silicate, iron oxide, and rare earth elements (or rare earth metals, REEs), from massive industrial waste coal ash. In one embodiment, the process includes a plurality of caustic extractions of coal ash at an elevated temperature, followed by an acidic treatment to dissolve aluminum silicate and REEs. The dissolved aluminum silicate is precipitated out by pH adjustment as a solid product while REEs remain in the solution. REEs are captured and enriched using an ion exchange column. Alternatively, the solution containing aluminum silicate and REEs is heated to produce silica gel, which is easily separated from the enriched REEs solution. REEs are then isolated and purified from the enriched solution to afford substantially pure individual REE by a ligand-assisted chromatography. Additionally, a simplified process using one caustic extraction and one acidic extraction with an ion exchange process was also investigated and optimized to afford a comparable efficiency.
-
公开(公告)号：US20240158887A1
公开(公告)日：2024-05-16
申请号：US18282235
申请日：2022-04-28
申请人： GUANGDONG BRUNP RECYCLING TECHNOLOGY CO., LTD. , HUNAN BRUNP RECYCLING TECHNOLOGY CO., LTD. , HUNAN BRUNP EV RECYCLING CO., LTD.
发明人： Shibao OUYANG , Changdong LI , Yanchao QIAO , Ruokui CHEN , Dingshan RUAN , Yong CAI
摘要： Disclosed is a method for efficiently removing fluorine from a spent lithium battery. The method comprises: mixing aluminum and a sodium hydroxide solution for reaction to obtain a sodium metaaluminate solution; introducing sulfuric acid into the sodium metaaluminate solution, and stirring to react at a certain temperature to obtain a fluorine removal agent; adding a sodium fluoroaluminate seed crystal and the fluorine removal agent into an impurity-removed battery powder leaching solution, introducing a sodium carbonate solution at the same time, performing reaction at a certain temperature, controlling the pH value of a reaction endpoint, and performing solid-liquid separation after the reaction is finished to obtain a fluorine-removed liquid and filter residues; and adding the sodium hydroxide solution into the filter residues for reaction, and performing solid-liquid separation to obtain a filtrate containing fluorine and aluminum, and insoluble residues. According to the present invention, fluorine removal is induced by adding the sodium fluoroaluminate seed crystal; and during fluorine removal, the seed crystal sodium fluoroaluminate is firstly added into the battery leaching solution, and by means of induction of the seed crystal, combination of fluorine and aluminum in the solution can be accelerated to generate sodium hexafluoroaluminate, the reaction time is shortened, the fluorine removal efficiency is improved, and fluorine in the solution can be removed to be lower than 20 mg/L, thereby achieving the purpose of deep fluorine removal.
-
公开(公告)号：US11859263B2
公开(公告)日：2024-01-02
申请号：US16342934
申请日：2017-10-19
申请人： Jetti Resources, LLC
发明人： David Dixon , Edouard Asselin , Zihe Ren , Nelson Mora Huertas
CPC分类号： C22B23/043 , C01G3/003 , C01G11/003 , C01G53/003 , C22B3/08 , C22B15/0071 , C22B17/04
摘要： This application pertains to methods of recovering metals from metal sulfides that involve contacting the metal sulfide with an acidic sulfate solution containing ferric sulfate and a reagent that has a thiocarbonyl functional group, wherein the concentration of reagent in the acidic sulfate solution is sufficient to increase the rate of metal ion extraction relative to an acidic sulfate solution that does not contain the reagent, to produce a pregnant solution containing the metal ions.
-
公开(公告)号：US20230272506A1
公开(公告)日：2023-08-31
申请号：US18014968
申请日：2021-07-16
申请人： ANGLO AMERICAN TECHNICAL & SUSTAINABILITY SERVICES LTD , ANGLO CORPORATE SERVICES SOUTH AFRICA (PTY) LTD
摘要： THIS invention relates a method for processing a sulphide ore containing metal values comprising the integration of a sand heap leach (10) and a flotation process (12), providing a method which is suited to processing ores with significant quantities of leachable sulphides. The method includes a comminution step (14), and the classification of the comminuted ore into an oversize coarse fraction (16), a fine fraction (18) suitable for fine flotation and optionally an intermediate fraction (20) suitable for coarse flotation. A concentrate (30) containing iron sulphides from a fine flotation step (22) and optionally a concentrate (36) from a coarse flotation step (34) are blended with the oversize coarse fraction (16), to obtain a blended ore (39) is stacked and subjected to a heap leach process (40).
-
公开(公告)号：US20230250507A1
公开(公告)日：2023-08-10
申请号：US18010576
申请日：2021-05-31
发明人： Hyeon Hui LEE , Ji Yun PARK , Young Bin SEO , Seung Ok LEE , Sung Real SON
摘要： In a method for recovering an active metal of a lithium secondary battery, a sulfuric acid solution is added to a lithium metal composite oxide so as to prepare a sulfated active material solution. A transition metal is extracted from the sulfated active material solution. A lithium precursor is recovered by adding a lithium extracting agent to the solution remaining after the transition metal has been extracted from the sulfated active material solution. In the method, the amount of impurities is reduced, and sulfuric acid and the neutralizing agent can be recycled so that a high-yield lithium precursor recovery is enabled.
-
公开(公告)号：US20230071697A1
公开(公告)日：2023-03-09
申请号：US17797212
申请日：2021-02-10
发明人： Hiroshi Takenouchi , Satoshi Asano , Shin-ichi Heguri , Hirofumi Shouji , Keiji Kudou , Itsumi Matsuoka , Shota Sanjo , Takumi Matsugi
摘要： Provided is a method for treating an alloy by which nickel and/or cobalt can be selectively isolated from an alloy that contains copper as well as nickel and/or cobalt, in a waste lithium ion battery. The present invention is a method for treating an alloy, by which a solution that contains nickel and/or cobalt is obtained from an alloy that contains copper as well as nickel and/or cobalt, the method including: a leaching step in which a leachate is obtained by subjecting an alloy to an acid-based leaching treatment under conditions in which a sulfurizing agent is also present; a reduction step in which a reduced solution is obtained by subjecting the leachate to a reduction treatment using a reducing agent; and an oxidation/neutralization step in which a solution that contains nickel and/or cobalt is obtained by adding an oxidizing agent and also a neutralizing agent to the reduced solution.
-
公开(公告)号：US11560609B2
公开(公告)日：2023-01-24
申请号：US16876070
申请日：2020-05-17
摘要： A method of extracting metals from polymetallic sulphide ores or concentrates comprising at least Cu, Zn, Pb and Ag, comprising a first step of atmospheric leaching in sulphate medium in the presence of recycled silver for extracting Cu and Zn and a second step of atmospheric leaching in chloride medium for extracting Pb and Ag.
-
-
-
-
-
-
-
-
-
搜索结果
583 条记录 (耗时 0.034 秒)
