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[{"key": "dc.contributor.advisor", "value": "V\u00e4is\u00e4nen, Ari", "language": null, "element": "contributor", "qualifier": "advisor", "schema": "dc"}, {"key": "dc.contributor.author", "value": "Kangas, Sanna", "language": null, "element": "contributor", "qualifier": "author", "schema": "dc"}, {"key": "dc.date.accessioned", "value": "2017-12-20T07:52:12Z", "language": null, "element": "date", "qualifier": "accessioned", "schema": "dc"}, {"key": "dc.date.available", "value": "2017-12-20T07:52:12Z", "language": null, "element": "date", "qualifier": "available", "schema": "dc"}, {"key": "dc.date.issued", "value": "2017", "language": null, "element": "date", "qualifier": "issued", "schema": "dc"}, {"key": "dc.identifier.other", "value": "oai:jykdok.linneanet.fi:1809927", "language": null, "element": "identifier", "qualifier": "other", "schema": "dc"}, {"key": "dc.identifier.uri", "value": "https://jyx.jyu.fi/handle/123456789/56447", "language": null, "element": "identifier", "qualifier": "uri", "schema": "dc"}, {"key": "dc.description.abstract", "value": "Tutkielman kirjallisessa osassa k\u00e4sitell\u00e4\u00e4n yleisesti harvinaisia maametalleja, niiden ominaisuuksia, valmistusta, k\u00e4ytt\u00f6kohteita ja kierr\u00e4tyst\u00e4 lopputuotteista. Harvinaisten maametallien k\u00e4ytt\u00f6kohteista keskityt\u00e4\u00e4n neodyymi-rauta-boori -magneetteihin (NdFeB -magneetit) ja niiden kierr\u00e4tykseen. Tutkielmassa k\u00e4yd\u00e4\u00e4n l\u00e4pi erilaiset harvinaisten maametallien hydrometallurgiset ja pyrometallurgiset talteenottomenetelm\u00e4t.\n\nTutkimusprojektissa pyrittiin kehitt\u00e4m\u00e4\u00e4n NdFeB -magneettien kierr\u00e4tysmenetelm\u00e4, jolla magneettien harvinaiset maametallit saataisiin erotettua muista magneettien sis\u00e4lt\u00e4mist\u00e4 alkuaineista, kuten raudasta, boorista, koboltista ja nikkelist\u00e4. Kehitettiin menetelm\u00e4, jolla NdFeB -magneetit saatiin liuotettua kokonaan typpihappoon ja liuoksesta saatiin erotettua rauta 99 %:sti metyyli-isobutyyliketoniin yhdell\u00e4 neste-nesteuutolla. Raudan poistamisen j\u00e4lkeen muut alkuaineet, kuten nikkeli, koboltti ja boori haluttiin poistaa harvinaisten maametallien seoksesta, joten liuoksesta saostettiin harvinaiset maametallit oksalaatteina. Oksalaattisaostuman metalleista 97 %:a oli harvinaisia maametalleja. Liuotetun oksalaattisaostuman metalleista oli 85 % neodyymi\u00e4, 5 % dysprosiumia, 3,5 % praseodyymi\u00e4 ja 3 % samariumia. N\u00e4iden lis\u00e4ksi saostumassa oli pieni\u00e4 m\u00e4\u00e4ri\u00e4 muita harvinaisia maametalleja sek\u00e4 esimerkiksi nikkeli\u00e4, kobolttia ja booria. Oksalaattisaostuma voidaan kalsinoida harvinaisten maametallien oksideiksi, jolloin seosta voidaan k\u00e4ytt\u00e4\u00e4 uusien NdFeB -magneettien tuotannossa.", "language": "fi", "element": "description", "qualifier": "abstract", "schema": "dc"}, {"key": "dc.description.provenance", "value": "Submitted using Plone Publishing form by Sanna Kangas (kangsama) on 2017-12-20 07:52:10.598528. Form: Pro gradu -lomake (https://kirjasto.jyu.fi/julkaisut/julkaisulomakkeet/pro-gradu-lomake). JyX data: [jyx_publishing-allowed (fi) =True]", "language": "en", "element": "description", "qualifier": "provenance", "schema": "dc"}, {"key": "dc.description.provenance", "value": "Submitted by jyx lomake-julkaisija (jyx-julkaisija.group@korppi.jyu.fi) on 2017-12-20T07:52:11Z\nNo. of bitstreams: 2\nURN:NBN:fi:jyu-201712204798.pdf: 1394558 bytes, checksum: 31e76c0410d4c4e84255993ae7721bce (MD5)\nlicense.html: 4812 bytes, checksum: 8a224753e90fecdd9a3e9f76fa8136b8 (MD5)", "language": "en", "element": "description", "qualifier": "provenance", "schema": "dc"}, {"key": "dc.description.provenance", "value": "Made available in DSpace on 2017-12-20T07:52:12Z (GMT). No. of bitstreams: 2\nURN:NBN:fi:jyu-201712204798.pdf: 1394558 bytes, checksum: 31e76c0410d4c4e84255993ae7721bce (MD5)\nlicense.html: 4812 bytes, checksum: 8a224753e90fecdd9a3e9f76fa8136b8 (MD5)\n Previous issue date: 2017", "language": "en", "element": "description", "qualifier": "provenance", "schema": "dc"}, {"key": "dc.format.extent", "value": "1 verkkoaineisto (93 sivua)", "language": null, "element": "format", "qualifier": "extent", "schema": "dc"}, {"key": "dc.format.mimetype", "value": "application/pdf", "language": null, "element": "format", "qualifier": "mimetype", "schema": "dc"}, {"key": "dc.language.iso", "value": "fin", "language": null, "element": "language", "qualifier": "iso", "schema": "dc"}, {"key": "dc.rights", "value": "In Copyright", "language": "en", "element": "rights", "qualifier": null, "schema": "dc"}, {"key": "dc.subject.other", "value": "Magneetit", "language": null, "element": "subject", "qualifier": "other", "schema": "dc"}, {"key": "dc.subject.other", "value": "magneettien kierr\u00e4tys", "language": null, "element": "subject", "qualifier": "other", "schema": "dc"}, {"key": "dc.subject.other", "value": "Harvinaiset maametallit", "language": null, "element": "subject", "qualifier": "other", "schema": "dc"}, {"key": "dc.subject.other", "value": "REM", "language": null, "element": "subject", "qualifier": "other", "schema": "dc"}, {"key": "dc.subject.other", "value": "Neste-nesteuutto", "language": null, "element": "subject", "qualifier": "other", "schema": "dc"}, {"key": "dc.subject.other", "value": "Hydrometallurgia", "language": null, "element": "subject", "qualifier": "other", "schema": "dc"}, {"key": "dc.title", "value": "Harvinaisten maametallien talteenotto NdFeB -magneeteista", "language": null, "element": "title", "qualifier": null, "schema": "dc"}, {"key": "dc.type", "value": "master thesis", "language": null, "element": "type", "qualifier": null, "schema": "dc"}, {"key": "dc.identifier.urn", "value": 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"department", "schema": "dc"}, {"key": "dc.contributor.organization", "value": "University of Jyv\u00e4skyl\u00e4", "language": "en", "element": "contributor", "qualifier": "organization", "schema": "dc"}, {"key": "dc.contributor.organization", "value": "Jyv\u00e4skyl\u00e4n yliopisto", "language": "fi", "element": "contributor", "qualifier": "organization", "schema": "dc"}, {"key": "dc.subject.discipline", "value": "Ep\u00e4orgaaninen ja analyyttinen kemia", "language": "fi", "element": "subject", "qualifier": "discipline", "schema": "dc"}, {"key": "dc.subject.discipline", "value": "Inorganic and Analytical Chemistry", "language": "en", "element": "subject", "qualifier": "discipline", "schema": "dc"}, {"key": "dc.date.updated", "value": "2017-12-20T07:52:12Z", "language": null, "element": "date", "qualifier": "updated", "schema": "dc"}, {"key": "yvv.contractresearch.funding", "value": "0", "language": null, "element": "contractresearch", "qualifier": "funding", "schema": "yvv"}, 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