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公开(公告)号：US20190185964A1
公开(公告)日：2019-06-20
申请号：US16327359
申请日：2017-08-21
CPC分类号： C22B59/00 , B01D11/04 , C22B3/44 , Y02P10/234
摘要： Provided is a method for efficiently purifying scandium by separating scandium and impurities from an acidic solution which contains scandium and impurities that include iron. A method for purifying scandium according to the present invention subjects an acidic solution, which contains an element component including at least ion, while containing scandium, to solvent extraction by means of a mixed extractant containing a phosphoric acid-based extractant and a neutral extractant, thereby extracting scandium from the acidic solution. It is preferable that the phosphoric acid-based extractant is contained in the mixed extractant at a mixing molar ratio within the range of from 5% to 50% (inclusive). It is also preferable that the pH of the acidic solution is adjusted to a value within the range of from 0.0 to 2.0 (inclusive) before the solvent extraction.
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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：US20210262060A1
公开(公告)日：2021-08-26
申请号：US17252354
申请日：2019-06-21
摘要： Provided is a method for efficiently separating copper from nickel and cobalt from a sulfide containing nickel and cobalt together with copper. The present invention is a method for separating copper from nickel and cobalt, the method comprising pulverizing a sulfide containing copper and nickel and cobalt into a predetermined size and then stirring the resultant product under the condition having an oxidation-reduction potential (a reference electrode: a silver/silver chloride electrode) of less than 100 mV using an acid solution to perform a leaching treatment. In this separation method, a leach liquor in which nickel and cobalt are leached and a leach residue containing copper sulfate are produced as the result of the leaching treatment.
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公开(公告)号：US10933613B2
公开(公告)日：2021-03-02
申请号：US16381381
申请日：2019-04-11
发明人： Kenichi Fujita , Hiroshi Kobayashi
IPC分类号： B32B17/10
摘要： To provide a heat-ray shielding film mainly composed of polyvinyl acetal resin and a method for manufacturing the same capable of exhibiting excellent optical characteristics and high weather resistance by using composite tungsten oxide fine particles having a high heat-ray shielding effect, and a heat-ray shielding laminated transparent base material using the heat-ray shielding film, the heat-ray shielding film containing fine particles having a heat-ray shielding function, polyvinyl acetal resin, and a plasticizer, wherein the fine particles having the heat-ray shielding function is expressed by a general formula MyWOz (wherein N is one kind or more elements selected from a group consisting of Cs, Rb, K, Tl, In, Ba, Li, Sr, Fe, Sn, Al, and Cu, satisfying 0.1≤y≤0.5, 2.2≤z≤3.0), which are composite tungsten oxide fine particles having a hexagonal crystal structure, the heat-ray shielding film further containing metal carboxylate.
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公开(公告)号：US10697043B2
公开(公告)日：2020-06-30
申请号：US16082384
申请日：2017-03-01
发明人： Yusuke Senba , Itsumi Matsuoka , Hiroshi Kobayashi
摘要： In separating scandium and thorium from a leachate obtained by adding sulfuric acid to a nickel oxide ore containing scandium and thorium, scandium is recovered from only one system. The method according to the invention comprises: an extraction step S1 for treating a nickel oxide ore containing scandium and thorium with sulfuric acid to give an acidic solution (a feed solution for extraction), and then solvent-extracting the feed solution with the use of a scandium extractant containing an amide derivative to thereby divide the feed solution into an organic extract (a first organic phase) containing scandium and thorium and a liquid extract (a first aqueous phase) containing impurities; and a washing step S2 for adding sulfuric acid to the organic extract (the first organic phase) and thus dividing the same into washed organic matters (a second organic phase) containing thorium and a washed liquid (a second aqueous phase) containing scandium.
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公开(公告)号：US20190040492A1
公开(公告)日：2019-02-07
申请号：US16073946
申请日：2017-01-31
发明人： Itsumi Matsuoka , Hiroshi Kobayashi , Yusuke Senba
摘要： The present invention provides a method for easy and efficient recovery of high purity scandium from nickel oxide ore, the method comprising: an adsorption step for passing a scandium-containing solution through an ion exchange resin to adsorb scandium on the ion exchange resin; an elution step for eluting scandium from the ion exchange resin to obtain a post-elution solution; an impurity extraction step in which after the elution step, the scandium-containing solution is subjected to a first solvent extraction using an amine-based impurity extractant and is separated into a first aqueous phase containing scandium and into a first organic phase containing impurities; and a scandium extraction step in which the first aqueous phase is subjected to a second solvent extraction using an amide derivative-containing scandium extractant to obtain a second organic phase containing scandium.
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公开(公告)号：US20190024213A1
公开(公告)日：2019-01-24
申请号：US16071920
申请日：2017-01-11
摘要： The method for recovering scandium pertaining to the present invention has: a first neutralization step for passing a solution containing scandium over an ion exchange resin, adding a neutralizing agent to the eluent eluted from the ion exchange resin and performing a neutralization treatment, and obtaining a primary neutralized sediment and a primary neutralized filtrate by solid-liquid separation; a second neutralization step for further adding a neutralizing agent to the primary neutralized filtrate and performing a neutralization treatment, and obtaining a secondary neutralized sediment and a secondary neutralized filtrate by solid-liquid separation; a hydroxide dissolution step for adding acid to the secondary neutralized sediment and obtaining a hydroxide solution; a solvent extraction step for subjecting the hydroxide solution to solvent extraction; and a scandium recovery step for recovering scandium oxide from a raffinate separated in the solvent extraction step.
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公开(公告)号：US20180023168A1
公开(公告)日：2018-01-25
申请号：US15546038
申请日：2015-12-08
CPC分类号： C22B3/42 , C22B3/22 , C22B3/44 , C22B59/00 , Y02P10/234
摘要： Provided is a method for recovering scandium with which scandium can be efficiently recovered as high purity scandium oxide from a scandium-containing solution containing impurities such as iron without causing problems such as increased cost and safety problems. According to the method for recovering scandium according to the present invention, the pH of a solution containing scandium and iron (scandium-containing solution) is adjusted within the range of not less than −0.5 and less than 1, then scandium oxalate is obtained by adding the pH adjusted solution to an oxalic acid solution, and the scandium oxalate is roasted into scandium oxide.
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公开(公告)号：US20220154308A1
公开(公告)日：2022-05-19
申请号：US17437588
申请日：2020-03-16
发明人： Hideki Ohara , Shota Sanjo , Masatoshi Takano , Satoshi Asano , Hiroshi Kobayashi , Yusuke Senba , Hiroto Watanabe
摘要： A method of manufacturing a cobalt-nickel-containing solution including: preparing a crude nickel hydroxide and/or a crude cobalt hydroxide as a starting material, the crude nickel or cobalt hydroxide containing cobalt and nickel and elements except the cobalt and nickel as impurities, the crude nickel hydroxide containing the nickel more than the cobalt, and the crude cobalt hydroxide containing the cobalt more than the nickel; a water-washing process for obtaining a post-water-washing crude hydroxide from the starting material; a leaching process for obtaining a post-leaching solution from the post-water-washing crude hydroxide; a neutralization process of subjecting the post-leaching solution to neutralization and solid-liquid-separation to remove the impurities as a post-neutralization residue containing one or more of iron, silicon, aluminum, and chromium, thereby obtaining a post-neutralization solution; and an extraction process of subjecting the post-neutralization solution to solvent extraction to obtain a post-extraction solution containing cobalt and nickel with the impurities reduced.
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10.发明授权公开(公告)号：US10676612B2
公开(公告)日：2020-06-09
申请号：US16073938
申请日：2016-10-27
发明人： Hiroshi Kobayashi , Kenichi Fujita
摘要： A polycarbonate resin composition capable of suppressing the deterioration of the weather resistance of the infrared shielding material fine particles, including: a composite tungsten oxide fine particle (A), a weather resistance improver (B), and a polycarbonate resin (C), wherein (A) is expressed by a general formula MxWOy, and (B) is any one of those containing a phosphite compound (B1), or containing the phosphite compound and one or more kinds selected from a hindered phenol-based stabilizer, phosphoric acid-based stabilizer and sulfur-based stabilizer (B2), or containing a hindered phenol-based stabilizer and one or more kinds selected from a phosphoric acid-based stabilizer and sulfur-based stabilizer (B3), and an addition amount of (B) is 0.1 parts by weight or more and 20 parts by weight or less, based on 1 parts by weight of (A), and provides a heat ray shielding molded body and a heat ray shielding lamination body produced using the composition.
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