Exploring the Chemical Kinetics of Rare Earth Element Separation under Thermal Conditions

Exploring the Chemical Kinetics of Rare Earth Element Separation under Thermal Conditions | Research Square window.SnipcartSettings = { analytics: { enabled: false } }; (function() { var accessVector = localStorage.getItem('access_vector') || ''; window.dataLayer = window.dataLayer || []; if (accessVector) { window.dataLayer.push({ user: { profile: { profileInfo: { snid: accessVector } } } }); } })(); (function(w,d,s,l,i){w[l]=w[l]||[];w[l].push({'gtm.start':new Date().getTime(),event:'gtm.js'});var f=d.getElementsByTagName(s)[0],j=d.createElement(s),dl=l!='dataLayer'?'&l='+l:'';j.async=true;j.src='https://www.googletagmanager.com/gtm.js?id='+i+dl;f.parentNode.insertBefore(j,f);})(window,document,'script','dataLayer','GTM-K279D39R'); Browse Preprints In Review Journals COVID-19 Preprints AJE Video Bytes Research Tools Research Promotion AJE Professional Editing AJE Rubriq About Preprint Platform In Review Editorial Policies Our Team Advisory Board Help Center Sign In Submit a Preprint Cite Share Download PDF Research Article Exploring the Chemical Kinetics of Rare Earth Element Separation under Thermal Conditions Nofriady Aziz, Imam Abdurrosyid, Yogi Priasetyono, Agus Sumaryanto, and 16 more This is a preprint; it has not been peer reviewed by a journal. https://doi.org/ 10.21203/rs.3.rs-8822740/v1 This work is licensed under a CC BY 4.0 License Status: Published Journal Publication published 10 Apr, 2026 Read the published version in Transition Metal Chemistry → Version 1 posted 12 You are reading this latest preprint version Abstract Rare earth elements (REEs) are essential materials comprising 17 elements with broad applications in advanced technologies, especially in nuclear and industrial sectors. Dysprosium (Dy), for example, is used as a dopant in thermoluminescent dosimeter (TLD) crystals for radiation monitoring. REEs naturally occur in minerals such as monazite and xenotime, generally forming complex compounds. Previous research has emphasized purification, with precipitation considered an important preliminary step for element separation. This study investigates the precipitation of Praseodymium (Pr), Dysprosium (Dy), Neodymium (Nd), Cerium (Ce), and Lanthanum (La) at varying temperatures and times to determine rate constants and activation energies. The results showed that optimal conditions for Pr, Dy, and Nd precipitation were 60°C for 60 minutes, while Ce and La reached optimal precipitation at 40°C and 30°C, respectively, at 60 minutes. Kinetic analysis indicated that Pr, Ce, Nd, and La followed zero-order kinetics, whereas Dy followed first-order kinetics. Activation energies varied considerably, with Ce exhibiting the highest at 72.010 kJ/mol and Nd the lowest at 6.474 kJ/mol. This research presents a comparative kinetic analysis of multiple REEs under controlled temperature variation, offering valuable data for developing scalable and efficient REE recovery systems aligned with industrial innovation efforts. rare earth element separation kinetic temperature industrial innovation Full Text Additional Declarations No competing interests reported. Cite Share Download PDF Status: Published Journal Publication published 10 Apr, 2026 Read the published version in Transition Metal Chemistry → Version 1 posted Editorial decision: Revision requested 10 Mar, 2026 Reviews received at journal 02 Mar, 2026 Reviews received at journal 17 Feb, 2026 Reviews received at journal 12 Feb, 2026 Reviewers agreed at journal 12 Feb, 2026 Reviewers agreed at journal 12 Feb, 2026 Reviewers agreed at journal 10 Feb, 2026 Reviewers agreed at journal 10 Feb, 2026 Reviewers invited by journal 10 Feb, 2026 Editor assigned by journal 10 Feb, 2026 Submission checks completed at journal 09 Feb, 2026 First submitted to journal 08 Feb, 2026 You are reading this latest preprint version Research Square lets you share your work early, gain feedback from the community, and start making changes to your manuscript prior to peer review in a journal. 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Dysprosium (Dy), for example, is used as a dopant in thermoluminescent dosimeter (TLD) crystals for radiation monitoring. REEs naturally occur in minerals such as monazite and xenotime, generally forming complex compounds. Previous research has emphasized purification, with precipitation considered an important preliminary step for element separation. This study investigates the precipitation of Praseodymium (Pr), Dysprosium (Dy), Neodymium (Nd), Cerium (Ce), and Lanthanum (La) at varying temperatures and times to determine rate constants and activation energies. The results showed that optimal conditions for Pr, Dy, and Nd precipitation were 60\u0026deg;C for 60 minutes, while Ce and La reached optimal precipitation at 40\u0026deg;C and 30\u0026deg;C, respectively, at 60 minutes. Kinetic analysis indicated that Pr, Ce, Nd, and La followed zero-order kinetics, whereas Dy followed first-order kinetics. Activation energies varied considerably, with Ce exhibiting the highest at 72.010 kJ/mol and Nd the lowest at 6.474 kJ/mol. This research presents a comparative kinetic analysis of multiple REEs under controlled temperature variation, offering valuable data for developing scalable and efficient REE recovery systems aligned with industrial innovation efforts.\u003c/p\u003e","manuscriptTitle":"Exploring the Chemical Kinetics of Rare Earth Element Separation under Thermal Conditions","msid":"","msnumber":"","nonDraftVersions":[{"code":1,"date":"2026-02-13 17:11:25","doi":"10.21203/rs.3.rs-8822740/v1","editorialEvents":[{"type":"communityComments","content":0},{"type":"decision","content":"Revision requested","date":"2026-03-10T16:42:32+00:00","index":"","fulltext":""},{"type":"editorInvitedReview","content":"","date":"2026-03-02T08:34:51+00:00","index":"hide","fulltext":""},{"type":"editorInvitedReview","content":"","date":"2026-02-17T22:59:15+00:00","index":"hide","fulltext":""},{"type":"editorInvitedReview","content":"","date":"2026-02-12T20:09:20+00:00","index":"hide","fulltext":""},{"type":"reviewerAgreed","content":"239840269527660764450831536630379413830","date":"2026-02-12T17:00:47+00:00","index":"hide","fulltext":""},{"type":"reviewerAgreed","content":"71412112513580957803604508287524451646","date":"2026-02-12T11:03:04+00:00","index":"hide","fulltext":""},{"type":"reviewerAgreed","content":"281597962278385788075608883208070120158","date":"2026-02-10T15:35:58+00:00","index":"hide","fulltext":""},{"type":"reviewerAgreed","content":"209064980212544295295808105454777456224","date":"2026-02-10T15:08:39+00:00","index":"hide","fulltext":""},{"type":"reviewersInvited","content":"","date":"2026-02-10T10:34:15+00:00","index":"","fulltext":""},{"type":"editorAssigned","content":"","date":"2026-02-10T09:30:54+00:00","index":"","fulltext":""},{"type":"checksComplete","content":"","date":"2026-02-10T01:54:54+00:00","index":"","fulltext":""},{"type":"submitted","content":"Transition Metal Chemistry","date":"2026-02-08T15:27:33+00:00","index":"","fulltext":""}],"status":"published","journal":{"display":true,"email":"[email protected]","identity":"transition-metal-chemistry","isNatureJournal":false,"hasQc":true,"allowDirectSubmit":false,"externalIdentity":"tmch","sideBox":"Learn more about [Transition Metal Chemistry](http://link.springer.com/journal/11243)","snPcode":"11243","submissionUrl":"https://submission.nature.com/new-submission/11243/3","title":"Transition Metal Chemistry","twitterHandle":"","acdcEnabled":true,"dfaEnabled":true,"editorialSystem":"em","reportingPortfolio":"Springer Hybrid","inReviewEnabled":true,"inReviewRevisionsEnabled":false}}],"origin":"","ownerIdentity":"404ea486-4cd6-4882-8df4-d362aea2c335","owner":[],"postedDate":"February 13th, 2026","published":true,"recentEditorialEvents":[],"rejectedJournal":[],"revision":"","amendment":"","status":"published-in-journal","subjectAreas":[],"tags":[],"updatedAt":"2026-04-13T16:06:32+00:00","versionOfRecord":{"articleIdentity":"rs-8822740","link":"https://doi.org/10.1007/s11243-026-00734-1","journal":{"identity":"transition-metal-chemistry","isVorOnly":false,"title":"Transition Metal Chemistry"},"publishedOn":"2026-04-10 15:58:19","publishedOnDateReadable":"April 10th, 2026"},"versionCreatedAt":"2026-02-13 17:11:25","video":"","vorDoi":"10.1007/s11243-026-00734-1","vorDoiUrl":"https://doi.org/10.1007/s11243-026-00734-1","workflowStages":[]},"version":"v1","identity":"rs-8822740","journalConfig":"researchsquare"},"__N_SSP":true},"page":"/article/[identity]/[[...version]]","query":{"redirect":"/article/rs-8822740","identity":"rs-8822740","version":["v1"]},"buildId":"XKTyCvWXoU3ODBz1xrDgd","isFallback":false,"isExperimentalCompile":false,"dynamicIds":[84888],"gssp":true,"scriptLoader":[]}