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公开(公告)号：US11214849B2
公开(公告)日：2022-01-04
申请号：US16077821
申请日：2017-02-21
发明人： Hidemasa Nagai , Keiji Kudo , Itsumi Matsuoka , Yoshitomo Ozaki , Hirofumi Shoji , Shin-ya Matsumoto , Tatsuya Higaki
摘要： A method for recovering scandium, by which scandium is able to be recovered from nickel oxide ore. The present invention comprises: a leaching step S1 for obtaining a leachate by leaching a nickel oxide ore containing scandium with use of sulfuric acid; a neutralization step by adding a neutralizing agent thereto; a sulfurization step by adding a sulfurizing agent to the post-neutralization solution; an ion exchange step by bringing the post-sulfurization solution into contact with a chelating resin; a dissolution step by obtaining a precipitate of scandium hydroxide by adding an alkali into the scandium eluent, and subsequently adding an acid solution to the scandium hydroxide; a solvent extraction step by bringing the scandium acid dissolution liquid into contact with a neutral extractant; and a scandium recovery step by adding oxalic acid to the extraction residue and subsequently roasting the salt of scandium oxalate.
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公开(公告)号：US20230312364A1
公开(公告)日：2023-10-05
申请号：US18041643
申请日：2021-07-06
发明人： Enrico DI CESARE
IPC分类号： C01G49/10 , C01G23/053 , C01G23/047 , C01G49/00 , C01G31/04 , C01G31/00 , C01G49/06 , C01F17/212 , C01F17/17 , C01F5/06 , C05D9/02 , C22B1/02 , C22B3/10 , C22B59/00 , C22B34/12 , C22B34/22 , C22B3/26 , C22B1/245 , C22B3/24 , C22B3/06 , B22F9/14 , B22F9/20 , B33Y70/00
CPC分类号： C01G49/10 , C01G23/0536 , C01G23/0475 , C01G49/0009 , C01G31/04 , C01G31/003 , C01G49/06 , C01F17/212 , C01F17/17 , C01F5/06 , C05D9/02 , C22B1/02 , C22B3/10 , C22B59/00 , C22B34/1209 , C22B34/22 , C22B3/306 , C22B34/1245 , C22B34/1277 , C22B34/1295 , C22B1/245 , C22B3/24 , C22B3/065 , B22F9/14 , B22F9/20 , B33Y70/00 , C01P2006/80 , B22F2202/13 , B22F2301/205
摘要： The present invention relates to metallurgical processes, and more particularly to a process for producing titaniferous feedstock and fines, a process for agglomerating titaniferous fines, and a process for producing titaniferous metals and titaniferous alloys. Recovery of rare-earth, vanadium and scandium from titanium iron bearing resources is also disclosed. Selective leaching for Scandium recovery from all magnetite type resources such as ilmenite, ferro titanic resources, nickel laterites, magnetite iron resources etc.
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公开(公告)号：US20210284547A1
公开(公告)日：2021-09-16
申请号：US16328380
申请日：2017-08-21
发明人： Tatsuya Higaki , Masaki Imamura , Osamu Nakai , Hiroshi Kobayashi
IPC分类号： C01F17/212 , C22B3/44 , C22B3/42 , C22B59/00 , C01F17/13
摘要： Provided is a method for recovering scandium as scandium oxide that contains high-quality scandium and in which coarse particles having good handling properties are formed. This method for recovering scandium includes a step for carrying out an oxalate conversion process wherein oxalic acid is used in a solution containing scandium (scandium-containing solution) to generate a reaction in which the scandium is converted into an oxalate form, the method characterized in that the temperature of the reaction solution during the oxalate conversion process is 50° C. to 80° C.
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公开(公告)号：US11807545B2
公开(公告)日：2023-11-07
申请号：US16826622
申请日：2020-03-23
IPC分类号： C01F17/00 , C01F17/17 , C22B3/20 , C22B59/00 , C01F17/212
CPC分类号： C01F17/17 , C01F17/212 , C22B3/20 , C22B59/00
摘要： A method of separating scandium from a feedstock wherein a scandium enriched solution is produced from the feedstock and the scandium enriched solution is extracted to produce an organic phase of the scandium enriched solution. The organic phase of the scandium enriched solution is re-extracted to produce an aqueous phase including scandium chloride. The aqueous phase is precipitated and calcinated to produce scandium oxide powder.
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公开(公告)号：US11414598B2
公开(公告)日：2022-08-16
申请号：US16358305
申请日：2019-03-19
IPC分类号： C09K11/77 , C04B38/00 , C01F17/32 , C01F17/212 , C01F17/218 , C01F17/224 , C01F17/229 , C01F17/235 , C01F17/241
摘要： Disclosed here is a method for making a monolithic rare earth oxide (REO) aerogel, comprising: preparing a reaction mixture comprising at least one rare earth metal nitrate, at least one epoxide, at least one base catalyst, and at least one organic solvent; curing the mixture to produce a wet gel; drying the wet gel to produce a dry gel; and thermally annealing the dry gel to produce the monolithic REO aerogel. Also disclosed is an REO aerogel comprising a network of REO nanostructures, wherein the REO aerogel is a monolith having at least one lateral dimension of at least 1 cm, wherein the REO aerogel has a density of about 40-500 mg/cm3 and/or a BET surface area of at least about 20 m2/g, and wherein the REO aerogel is substantially free of oxychloride.
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公开(公告)号：US11224854B2
公开(公告)日：2022-01-18
申请号：US15775048
申请日：2016-11-11
发明人： Akihiro Omori
IPC分类号： B01J20/06 , B01J20/08 , B01J2/06 , C02F1/28 , B01J20/30 , B01J20/28 , B01J20/26 , C08J9/28 , C01G25/02 , C01F17/212 , C01F17/218 , C01F17/224 , C01F17/229 , C01F17/235 , B01D15/08 , B01J20/10
摘要： A porous formed article includes an organic polymer resin and an inorganic ion adsorbent and having the most frequent pore size of 0.08 to 0.70 μm measured with a mercury porosimeter. Such a porous formed article can be prepared by crushing and mixing a good solvent for the organic polymer resin and the inorganic ion adsorbent to obtain slurry; dissolving the organic polymer resin and a water-soluble polymer in the slurry; shape-forming the slurry; promoting coagulation of the shape-formed product by controlling the temperature and humidity of a spatial portion coming into contact with the shape-formed product, until the shape-formed product is coagulated in a poor solvent; and coagulating the coagulation-promoted shape-formed product in a poor solvent. A production apparatus can be used to prepare such a porous formed article.
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公开(公告)号：US20230416107A1
公开(公告)日：2023-12-28
申请号：US18213397
申请日：2023-06-23
发明人： Thomas Pierau , Frank Landwehr , Mitja Medved
IPC分类号： C01G23/047 , C01F17/10 , C01F17/212 , C01G53/04 , C01G37/02 , C01G33/00 , C01G45/02 , C10L5/48
CPC分类号： C01G23/0475 , C01F17/10 , C01F17/212 , C01G53/04 , C01G37/02 , C01G33/00 , C01G45/02 , C10L5/48
摘要： The invention relates to a method for treating a residue obtained from the chloride process, wherein the residue comprises the components titanium dioxide, coke, an inert metal oxide, and an iron-containing component. Further, the invention refers to the use of this method to separate the components contained in said residue, and to the use of the separated components in the chloride process for obtaining titanium dioxide.
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公开(公告)号：US20210284546A1
公开(公告)日：2021-09-16
申请号：US16328360
申请日：2017-08-23
发明人： Tatsuya Higaki , Hiroshi Kobayashi
IPC分类号： C01F17/212 , C01F17/13 , C22B3/42 , C22B3/44 , C22B59/00
摘要： Provided is a method for producing, from scandium oxalate crystals obtained through an oxalate conversion process, a readily-soluble scandium compound that dissolves easily in an aqueous solution such as an acid. This method for producing a scandium compound involves carrying out an oxalate conversion process using oxalic acid in a solution containing scandium, separating the product obtained through the oxalate conversion process into a liquid and scandium oxalate crystals, and obtaining a scandium compound by roasting the obtained scandium oxalate crystals at a temperature of 400° C. to 800° C., preferably 400° C. to 600° C.
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公开(公告)号：US20200308016A1
公开(公告)日：2020-10-01
申请号：US16826622
申请日：2020-03-23
IPC分类号： C01F17/17 , C01F17/212 , C22B59/00 , C22B3/20
摘要： A method of separating scandium from a feedstock wherein a scandium enriched solution is produced from the feedstock and the scandium enriched solution is extracted to produce an organic phase of the scandium enriched solution. The organic phase of the scandium enriched solution is re-extracted to produce an aqueous phase including scandium chloride. The aqueous phase is precipitated and calcinated to produce scandium oxide powder.
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10.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
发明人： Yemi OYEDIRAN , Daniel RISCHE , Christian GRAF
IPC分类号： C01F17/247 , C01F17/20 , C01F17/13 , C01F17/212 , C22B59/00 , C22B3/12 , C22B3/22 , C22B3/10
CPC分类号： C01F17/247 , C01F17/20 , C01F17/13 , C01F17/212 , C22B59/00 , C22B3/12 , C22B3/22 , C22B3/10
摘要： 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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