{"created":"2023-06-20T15:12:36.774730+00:00","id":9417,"links":{},"metadata":{"_buckets":{"deposit":"f98f9056-7f55-44dd-9d43-bee903e40413"},"_deposit":{"created_by":3,"id":"9417","owners":[3],"pid":{"revision_id":0,"type":"depid","value":"9417"},"status":"published"},"_oai":{"id":"oai:ynu.repo.nii.ac.jp:00009417","sets":["500:501"]},"author_link":["34889","34885","34887","34888","34886"],"item_2_biblio_info_8":{"attribute_name":"書誌情報","attribute_value_mlt":[{"bibliographicIssueDates":{"bibliographicIssueDate":"2018-11","bibliographicIssueDateType":"Issued"},"bibliographicPageEnd":"229","bibliographicPageStart":"224","bibliographicVolumeNumber":"128","bibliographic_titles":[{"bibliographic_title":"Minerals Engineering"}]}]},"item_2_description_5":{"attribute_name":"抄録","attribute_value_mlt":[{"subitem_description":"Recently, the development of a process to separate W and Co from tungsten carbide-cobalt (WC-Co) hard metal wastes has become important. In this study, we proposed a novel hydrometallurgical process involving the following steps: pretreatment, leaching, ion exchange, and two-step solvent extraction (I) and (II) using ionic liquids (ILs). First, an AlCrN film coating was completely removed from a WC-Co hard metal sample by leaching in a H2SO4–H3PO4 mixed acid medium at 423 K for 120 h. Then, the sample was oxidized at 1173 K for 10 h and XRD analysis showed that WO3 and CoWO4 were generated during this oxidization. After the oxidization, the leaching reaction WO3 + 2LiOH → WO42− + 2Li+ + H2O smoothly proceeded in leaching solution of 0.1 mol/L LiOH at 343 K for 19 h and the stoichiometry of WO3:LiOH was 1:2, which was consistent with that of the leaching reaction. Further, after the leaching step was completed, it was beneficial to exchange H+ and Li+ in the leaching solution using a cation exchange resin.Solvent extraction was performed using triethyl-n-pentyl phosphonium bis(trifluoromethylsulfonyl)amide as the IL, and tri-n-octylamine was employed as the extractant for the selective separation of W(VI) for solvent extraction (I). The extraction percentages (E) of W(VI) and Co(II) were >95% and <2.5% at pH = 1.0, respectively, and the selective extraction of W(VI) was confirmed in this study. The extraction mechanism of W(VI) was based on the ion association reaction n[R3N]org + [HxWyOzn−]aq + n[H+]aq ⇔ [(R3NH)nHxWyOz]org. In solvent extraction (II), a PC-88A/[P2225][NTf2] system was used for the effective extraction of Co(II) at pH > 4.3. The slope analysis results showed that the extraction mechanism was governed by the cation exchange reaction [Co2+]aq + 2[(HL)2]org ⇔ [CoL2·2HL]org + 2[H+]aq. A series of novel hydrometallurgical process using IL enabled us to demonstrate that W(VI) and Co(II) were efficiently recovered from WC-Co hard metal wastes.","subitem_description_type":"Abstract"}]},"item_2_publisher_35":{"attribute_name":"出版者","attribute_value_mlt":[{"subitem_publisher":"Elsevier B.V.  "}]},"item_2_relation_13":{"attribute_name":"DOI","attribute_value_mlt":[{"subitem_relation_type":"isVersionOf","subitem_relation_type_id":{"subitem_relation_type_id_text":"info:doi/10.1016/j.mineng.2018.08.047","subitem_relation_type_select":"DOI"}}]},"item_2_rights_14":{"attribute_name":"権利","attribute_value_mlt":[{"subitem_rights":"©2018, Elsevier B.V. This manuscript version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/"}]},"item_2_source_id_9":{"attribute_name":"ISSN","attribute_value_mlt":[{"subitem_source_identifier":"08926875","subitem_source_identifier_type":"ISSN"}]},"item_2_text_4":{"attribute_name":"著者所属","attribute_value_mlt":[{"subitem_text_value":"Graduate School of Environment and Information Sciences, Yokohama National University"},{"subitem_text_value":"Graduate School of Environment and Information Sciences, Yokohama National University"},{"subitem_text_value":"Graduate School of Environment and Information Sciences, Yokohama National University"},{"subitem_text_value":"Sanwayuka Industrial Corporation"},{"subitem_text_value":"Sanwayuka Industrial Corporation"}]},"item_2_version_type_18":{"attribute_name":"著者版フラグ","attribute_value_mlt":[{"subitem_version_resource":"http://purl.org/coar/version/c_ab4af688f83e57aa","subitem_version_type":"AM"}]},"item_creator":{"attribute_name":"著者","attribute_type":"creator","attribute_value_mlt":[{"creatorNames":[{"creatorName":"Song, Yueqi"}],"nameIdentifiers":[{"nameIdentifier":"34885","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"Tsuchida, Yusuke"}],"nameIdentifiers":[{"nameIdentifier":"34886","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"Matsumiya, Masahiko"}],"nameIdentifiers":[{"nameIdentifier":"34887","nameIdentifierScheme":"WEKO"},{"nameIdentifier":"00370057","nameIdentifierScheme":"e-Rad","nameIdentifierURI":"https://kaken.nii.ac.jp/ja/search/?qm=00370057"}]},{"creatorNames":[{"creatorName":"Uchino, Yuuki"}],"nameIdentifiers":[{"nameIdentifier":"34888","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"Yanagi, Itaru"}],"nameIdentifiers":[{"nameIdentifier":"34889","nameIdentifierScheme":"WEKO"}]}]},"item_files":{"attribute_name":"ファイル情報","attribute_type":"file","attribute_value_mlt":[{"accessrole":"open_date","date":[{"dateType":"Available","dateValue":"2020-12-01"}],"displaytype":"detail","filename":"MINE-D-18-00661R1.pdf","filesize":[{"value":"953.7 kB"}],"format":"application/pdf","licensetype":"license_note","mimetype":"application/pdf","url":{"label":"MINE-D-18-00661R1.pdf","url":"https://ynu.repo.nii.ac.jp/record/9417/files/MINE-D-18-00661R1.pdf"},"version_id":"987bd404-3af7-465d-91c0-1a0bf2ad9a98"}]},"item_keyword":{"attribute_name":"キーワード","attribute_value_mlt":[{"subitem_subject":"Ion exchange","subitem_subject_scheme":"Other"},{"subitem_subject":"Ionic liquid","subitem_subject_scheme":"Other"},{"subitem_subject":"Solvent extraction","subitem_subject_scheme":"Other"},{"subitem_subject":"Tungsten","subitem_subject_scheme":"Other"},{"subitem_subject":"WC-Co hard metal","subitem_subject_scheme":"Other"}]},"item_language":{"attribute_name":"言語","attribute_value_mlt":[{"subitem_language":"eng"}]},"item_resource_type":{"attribute_name":"資源タイプ","attribute_value_mlt":[{"resourcetype":"journal article","resourceuri":"http://purl.org/coar/resource_type/c_6501"}]},"item_title":"Separation of tungsten and cobalt from WC-Co hard metal wastes using ion-exchange and solvent extraction with ionic liquid","item_titles":{"attribute_name":"タイトル","attribute_value_mlt":[{"subitem_title":"Separation of tungsten and cobalt from WC-Co hard metal wastes using ion-exchange and solvent extraction with ionic liquid"}]},"item_type_id":"2","owner":"3","path":["501"],"pubdate":{"attribute_name":"公開日","attribute_value":"2018-12-05"},"publish_date":"2018-12-05","publish_status":"0","recid":"9417","relation_version_is_last":true,"title":["Separation of tungsten and cobalt from WC-Co hard metal wastes using ion-exchange and solvent extraction with ionic liquid"],"weko_creator_id":"3","weko_shared_id":3},"updated":"2023-06-20T19:27:27.067664+00:00"}