Journal of MmijPub Date : 2024-01-31DOI: 10.2473/journalofmmij.140.1
Takayo Yamamoto, T. Nagayama
{"title":"Electroforming Processing for Nano/Micro Fabrication","authors":"Takayo Yamamoto, T. Nagayama","doi":"10.2473/journalofmmij.140.1","DOIUrl":"https://doi.org/10.2473/journalofmmij.140.1","url":null,"abstract":"","PeriodicalId":16502,"journal":{"name":"Journal of Mmij","volume":"745 ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-01-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140476319","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"1 級アミンによる塩酸水溶液からのルテニウムの溶媒抽出特性","authors":"Shota TAKEMASA, Katsuya MOROI, Yuya SHIMOMAE, Tomohiro Ishibashi, Ryuichi Nishimura, Masakazu NIINAE","doi":"10.2473/journalofmmij.139.47","DOIUrl":"https://doi.org/10.2473/journalofmmij.139.47","url":null,"abstract":"Ru(III) chlorocomplexes are poorly extracted into organic solvents, which is due to the charge of the complex as well as those inert character in chloride solutions, that is, formation of RuCl6-n(H2O)n(3-n)- (n=0-6). Therefore, it is difficult to extract Ru(III) by solvent extraction, and Ru(III) is currently separated and purified by the oxidative distillation method. If Ru can be separated and recovered from chloride solutions by solvent extraction, an efficient separation and recovery process for PGMs can be established. Therefore, it is important to investigate the solvent extraction of Ru(III) from chloride solutions. The authors have previously studied solvent extraction of Ru(III) with 2-ethylhexylamine (EHA), which is a primary amine extractant, from chloride solutions and shown that the extraction of Ru(III) with EHA from chloride solutions without the addition of Sn (II)was high. However, the stripping of Ru(III) was difficult. In the present study, extractions of Ru from hydrochloric acid solutions with EHA and octylamine (OA), which are primary amines, were tested to clarify the extraction of Ru and the stripping of Ru with various stripping solutions. The extraction efficiency of Ru with EHA and OA from hydrochloric acid solutions without the addition of Sn (II) was high. And also, it was found that Ru could be easily stripped from EHA with sodium sulfate solutions.","PeriodicalId":16502,"journal":{"name":"Journal of Mmij","volume":"60 12","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135808166","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"酸性硫酸銅水溶液中における銅と銀および亜鉛のガルバニック対の電気化学的挙動とその場観察","authors":"Yasushi TAKASAKI, Shoichi KAWAKAMI, Hinako KUBO, Hiroyuki KANEKO","doi":"10.2473/journalofmmij.139.39","DOIUrl":"https://doi.org/10.2473/journalofmmij.139.39","url":null,"abstract":"The anodic dissolution reaction of copper in copper electro-refining was studied by considering the reaction of galvanic couples with different metals as impurities. In this study, zinc was chosen as a typical anodic impurity and silver as a cathodic impurity, and electrochemical measurements of galvanic couples with silver or zinc wires winding around a copper wire and in situ observation of the electrode surface using a stereo microscope were carried out. For comparison, copper wire with zinc or silver plating was used. As a result, even the simple method of winding silver or zinc wire around copper wire was able to capture the characteristic behavior of the galvanic reaction of silver and zinc on copper wire. It was also confirmed that zinc dissolution was accelerated by copper and copper dissolution was accelerated by silver, and that the effects were more promoted under anodic polarization. The crystallization and passivation of copper sulfate on the copper electrode surface and the dissolution behavior of silver were also observed. These results indicate that the experimental method presented in this study is an effective way to investigate the effects of impurities on the solubility and passivation of crude copper metal.","PeriodicalId":16502,"journal":{"name":"Journal of Mmij","volume":"45 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136341871","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Journal of MmijPub Date : 2023-08-31DOI: 10.2473/journalofmmij.139.21
S. Norota, Y. Iwasaki, Tagiru Ogino
{"title":"北海道精進川鉱山における坑廃水及び河川の水質の長期変化","authors":"S. Norota, Y. Iwasaki, Tagiru Ogino","doi":"10.2473/journalofmmij.139.21","DOIUrl":"https://doi.org/10.2473/journalofmmij.139.21","url":null,"abstract":"","PeriodicalId":16502,"journal":{"name":"Journal of Mmij","volume":"5 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-08-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84293341","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Journal of MmijPub Date : 2023-08-31DOI: 10.2473/journalofmmij.139.29
Yu-ki Taninouchi, H. Toru
{"title":"Technological Development Trends in Platinum Group Metal Recycling","authors":"Yu-ki Taninouchi, H. Toru","doi":"10.2473/journalofmmij.139.29","DOIUrl":"https://doi.org/10.2473/journalofmmij.139.29","url":null,"abstract":"","PeriodicalId":16502,"journal":{"name":"Journal of Mmij","volume":"155 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-08-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78058576","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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