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公开(公告)号：US11999626B1
公开(公告)日：2024-06-04
申请号：US18373975
申请日：2023-09-28
Applicant: Chongyi Zhangyuan Tungsten Co., Ltd.
Inventor： Guozuan Xu , Daibin Zhang , Chenglong Huang , Quan Peng , Xin Zhang , Qiumin Yang
CPC classification number: C01C1/28 , C01G41/00 , C22B3/06 , C22B3/08 , C22B3/10 , C22B3/22 , C22B3/44
Abstract: The present disclosure relates to the field of tungsten smelting, and in particular to a leaching method of scheelite, and provides a new technology that scheelite is leached in low temperature with a mixture acid of sulfuric acid and hydrochloric acid or nitric acid and hydrochloric acid, calcium is precipitated incompletely, and then the acid leaching solution is regenerated and closed-circuit recycled is provided. The new technology is able to leach scheelite sufficiently in low temperature so as to improve the recovery rate of tungstate and decrease the requirement of equipment. As well, the inner wall of the reaction kettle, the heating pipe and the temperature measuring device are made of steel lined tetrafluoro material which has high acid corrosion resistance and is able to deal with scheelite with high fluorine, resists the corrosion of HF.
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公开(公告)号：US11957996B2
公开(公告)日：2024-04-16
申请号：US17239925
申请日：2021-04-26
Applicant: Sichuan Normal University
Inventor： Shilin Zhao , Hongcheng Zhang , Jun Ma , Yang Liao , Liyang Han , Meng Jiang , Hao Huang , Chaoqun Li , Xiaoting Li , Hongyan Shang
CPC classification number: B01D11/0211 , B01D11/0288 , C01B7/20 , C22B3/10 , C22B3/12 , C22B3/22 , C22B59/00
Abstract: Disclosed is a microwave chemical method for totally extracting fluorine and rare earth from bastnaesite concentrate, including: alkaline conversion defluorination of bastnaesite through microwave irradiation, microwave-assisted leaching of fluorine, solid-liquid separation of leaching solution and microwave-assisted leaching of rare earth. The rare earth hydrochloric acid solution for leaching contains no fluorine ion, so that the fluorine interference of subsequent processes such as impurity removal can be completely avoided; the fluorine and the rare earth are leached with microwaves, which does not need the stirring, so that the automatic control is easy to implement; the fluorine and rare earth leaching speed is high, the leaching time is short and the complete leaching of fluorine and little residual alkali in the slag can be realized by two-time leaching; and no fluorine-containing waste water is discharged, and the total extraction of the rare earth can be realized by one-time leaching.
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公开(公告)号：US20230416872A1
公开(公告)日：2023-12-28
申请号：US18465359
申请日：2023-09-12
Applicant: STILLWATER MINING COMPANY
Inventor： Dave SHUCK , Jerry KOLSTAD , Mark RAPKOCH , Grenvil Marquis DUNN
IPC: C22B11/00 , C22B3/12 , C22B3/42 , C22B3/44 , C22B3/14 , C22B3/10 , C22B3/16 , C22B3/22 , C22B11/06
CPC classification number: C22B11/04 , C22B3/12 , C22B3/42 , C22B3/44 , C22B3/14 , C22B3/10 , C22B3/165 , C22B3/22 , C22B11/06 , Y02P10/20
Abstract: Discloses a hydrometallurgical process and system for the recovery of precious metals; specifically palladium, rhodium, and platinum metals, at high purity and with limited waste and environmental fouling.
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公开(公告)号：US11834729B2
公开(公告)日：2023-12-05
申请号：US18060378
申请日：2022-11-30
Inventor： Jianxi Zhu , Hongping He , Gaofeng Wang , Yuanyuan Wang , Mingqi Sun , Liuqing He , Xiaoliang Liang , Jingming Wei , Qingze Chen , Runliang Zhu
CPC classification number: C22B59/00 , C22B3/065 , C22B3/10 , C22B3/14 , C22B3/24 , C22B3/41 , C22B3/46
Abstract: A method for extracting rare earth elements (REEs) from a REE hyperaccumulator, including: subjecting the REE hyperaccumulator to microwave-assisted digestion to obtain a REE extract; subjecting the REE extract to absorption with a chelating resin and elution to obtain a purified REE solution; and subjecting the purified REE solution to precipitation and calcination to obtain high-purity rare earth compound.
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公开(公告)号：US11788170B2
公开(公告)日：2023-10-17
申请号：US16423960
申请日：2019-05-28
Applicant: STILLWATER MINING COMPANY
Inventor： Dave Shuck , Jerry Kolstad , Mark Rapkoch , Grenvil Marquis Dunn
IPC: C22B3/12 , C22B11/00 , C22B3/42 , C22B3/44 , C22B3/14 , C22B3/10 , C22B3/16 , C22B3/22 , C22B11/06
CPC classification number: C22B11/04 , C22B3/10 , C22B3/12 , C22B3/14 , C22B3/165 , C22B3/22 , C22B3/42 , C22B3/44 , C22B11/06 , Y02P10/20
Abstract: Discloses a hydrometallurgical process and system for the recovery of precious metals; specifically palladium, rhodium, and platinum metals, at high purity and with limited waste and environmental fouling.
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6.发明公开
公开(公告)号：US20230192506A1
公开(公告)日：2023-06-22
申请号：US18062318
申请日：2022-12-06
Applicant: IMPERIAL MINING GROUP LIMITED
Inventor： Yemi OYEDIRAN , Daniel RISCHE , Christian GRAF
IPC: C01F17/247 , C01F17/20 , C01F17/13 , C01F17/212 , C22B59/00 , C22B3/12 , C22B3/22 , C22B3/10
CPC classification number: C01F17/247 , C01F17/20 , C01F17/13 , C01F17/212 , C22B59/00 , C22B3/12 , C22B3/22 , C22B3/10
Abstract: Despite the abundance of scandium, its commercial applications continue to be limited by the absence of reliable, secure, stable and long-term production. The subject-matter disclosed herein provides for a method for extracting Rare Earth Elements (REE), scandium and/or Rare-Earth Oxides (REO) from ore and mineral concentrates, the method comprising: providing Rare Earth Elements (REE) and/or scandium bearing feedstock; a high-pressure caustic (HPC) leaching step, comprising leaching the feedstock in an alkali solution at a first temperature for a target period of time and at a given pressure to produce a leachate slurry; extracting a solid residue from the leachate slurry; leaching of the solid residue in a mineral acid to form a primary leach solution; extracting scandium and/or REE from the primary leach solution; and/or precipitating REE remaining in the raffinate to form a mixed REE-carbonate to thereby facilitate the extraction of REO.
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公开(公告)号：US10011889B2
公开(公告)日：2018-07-03
申请号：US14950153
申请日：2015-11-24
Applicant: LIFEZONE LIMITED
Inventor： Keith Stuart Liddell , Lisa Anne Smith , Michael David Adams
IPC: C22B3/00 , C22B3/20 , C01B7/07 , C01B17/027 , C01B33/12 , C22B3/08 , C22B3/10 , C22B26/20 , C22B59/00 , C22B3/04 , C22B3/44
CPC classification number: C22B3/20 , C01B7/0706 , C01B7/0737 , C01B17/027 , C01B33/12 , C22B3/04 , C22B3/08 , C22B3/10 , C22B3/44 , C22B11/04 , C22B26/20 , C22B59/00 , Y02P10/234
Abstract: This invention provides a hydrometallurgical process for extracting one or more saleable products from a sulphate or chloride pregnant leach solution (PLS), or both. The products may be any one or more of the products selected from the group consisting of: precious metals including platinum group metals (PGMs), gold and silver, base metals, and rare metal elements, and metal cathodes, powders, salts or precipitates thereof; sulphur; hydrochloric acid (HCl); calcium; and silica.
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公开(公告)号：US09982320B2
公开(公告)日：2018-05-29
申请号：US14950130
申请日：2015-11-24
Applicant: LIFEZONE LIMITED
Inventor： Keith Stuart Liddell , Lisa Anne Smith , Michael David Adams
CPC classification number: C22B3/08 , C01B7/0706 , C01B7/0712 , C01B7/0718 , C22B3/10 , C22B3/20 , C22B11/04 , C22B11/06 , C22B15/0069 , C22B15/0071 , C22B23/0423 , C22B23/043 , C25C1/20 , Y02P10/234
Abstract: This invention describes a hydrometallurgical process for the recovery and separation of valuable elements, in particular gold and silver, from a feed material comprising a refractory, intractable or otherwise poorly responding to conventional treatment routes ores, concentrates and other materials. In particular, the process is a process integrated into one or more existing value element extraction processes.
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公开(公告)号：US20180142325A1
公开(公告)日：2018-05-24
申请号：US15875267
申请日：2018-01-19
Applicant: Yatendra Sharma , Reed Advanced Materials PTY Ltd.
Inventor： Yatendra Sharma
IPC: C22B26/12 , C22B4/02 , C22B3/44 , C22B3/42 , C01D15/04 , C22B3/10 , C01D15/02 , C01D15/08 , C25B1/16
CPC classification number: C22B26/12 , C01B7/012 , C01D15/02 , C01D15/04 , C01D15/08 , C22B3/10 , C22B3/42 , C22B3/44 , C22B4/02 , C25B1/16 , C25B1/34 , Y02P10/234
Abstract: A process (10) for the treatment of a lithium containing material, the process comprising the steps of: (i) Preparing a process solution from the lithium containing material (12); (ii) Passing the process solution from step (i) to a series of impurity removal steps (36) thereby providing a substantially purified lithium chloride solution; and (iii) Passing the purified lithium chloride solution of step (ii) to an electrolysis step (70) thereby producing a lithium hydroxide solution.
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公开(公告)号：US09828255B2
公开(公告)日：2017-11-28
申请号：US15307672
申请日：2015-04-27
Inventor： Qingchang Lu
IPC: C01G23/053 , C01G23/047 , C01G23/08 , C22B3/10 , C22B3/22 , B82Y30/00 , B82Y40/00
CPC classification number: C01G23/053 , B82Y30/00 , B82Y40/00 , C01G23/001 , C01G23/047 , C01G23/0536 , C01G23/08 , C01G49/10 , C01P2002/72 , C01P2002/74 , C01P2004/01 , C01P2004/03 , C01P2004/64 , C01P2006/80 , C22B3/10 , C22B3/22
Abstract: The present invention belongs to the field of preparation technique of inorganic functional material and provides a method for preparing nanometer titanium dioxide which comprises the following steps: (1) dissolving ilmenite powder using hydrochloric acid to obtain a raw ore solution; (2) eliminating the iron element in the raw ore solution to obtain a final solution containing titanium ions; (3) heating the final solution for hydrolysis to obtain a hydrolyzed product containing titanium dioxide; and (4) calcining the obtained hydrolyzed product to obtain nanometer titanium dioxide. The present invention has the advantages that the raw materials can be easily obtained, the energy consumption is low, both rutile type titanium dioxide and anatase type titanium dioxide can be produced, and the product has high purity, small particle diameter, narrow particle diameter distribution and good dispersibility.
