{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,2,13]],"date-time":"2026-02-13T18:12:41Z","timestamp":1771006361701,"version":"3.50.1"},"reference-count":33,"publisher":"MDPI AG","issue":"2","license":[{"start":{"date-parts":[[2021,4,17]],"date-time":"2021-04-17T00:00:00Z","timestamp":1618617600000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"DOI":"10.13039\/501100001871","name":"Funda\u00e7\u00e3o para a Ci\u00eancia e a Tecnologia","doi-asserted-by":"publisher","award":["UIDB\/00100\/2020"],"award-info":[{"award-number":["UIDB\/00100\/2020"]}],"id":[{"id":"10.13039\/501100001871","id-type":"DOI","asserted-by":"publisher"}]},{"name":"MINISTERIO DE EDUCACION, CULTURA y DEPORTE","award":["SALVADOR DE MADARIAGA 2017 PRX17\/00286"],"award-info":[{"award-number":["SALVADOR DE MADARIAGA 2017 PRX17\/00286"]}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Recycling"],"abstract":"<jats:p>Considering economics and environmental sustainability, recycling of critical metals from end-of-life devices should be a priority. In this work the hydrometallurgical treatment of a spent automotive catalytic converter (SACC) using HCl with CaCl2 as a leaching medium, and solvent extraction (SX) with a thiodiglycolamide derivative, is reported. The aim was to develop a leaching scheme allowing high Pt recoveries and minimizing Al dissolution, facilitating the application of SX. The replacement of part of HCl by CaCl2 in the leaching step is viable, without compromising Pt recovery (in the range 75\u201385%), as found for the mixture 2 M CaCl2 + 8 M HCl when compared to 11.6 M HCl. All leaching media showed good potential to recover Ce, particularly for higher reaction times and temperatures. Regarding SX, results achieved with a model solution were promising, but SX for Pt separation from the real SACC solution did not work as expected. For the adopted experimental conditions, the tested thiodiglycolamide derivative in toluene revealed a very good loading performance for both Pt and Fe, but Fe removal and Pt stripping from the organic phases after contact with the SACC solution were not successfully accomplished. Hence, the reutilization of the organic solvent needs improvement.<\/jats:p>","DOI":"10.3390\/recycling6020027","type":"journal-article","created":{"date-parts":[[2021,4,19]],"date-time":"2021-04-19T21:59:49Z","timestamp":1618869589000},"page":"27","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":18,"title":["Recovery of Platinum from a Spent Automotive Catalyst through Chloride Leaching and Solvent Extraction"],"prefix":"10.3390","volume":"6","author":[{"ORCID":"https:\/\/orcid.org\/0000-0001-9642-0875","authenticated-orcid":false,"given":"Ana","family":"M\u00e9ndez","sequence":"first","affiliation":[{"name":"Departamento de Ingenier\u00eda Geol\u00f3gica y Minera, E.T.S.I. Minas y Energ\u00eda. Universidad Polit\u00e9cnica de Madrid, 28040 Madrid, Spain"}]},{"given":"Carlos A.","family":"Nogueira","sequence":"additional","affiliation":[{"name":"Laborat\u00f3rio Nacional de Energia e Geologia, I. P. (LNEG), Campus do Lumiar, 1649-038 Lisboa, Portugal"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-3858-9386","authenticated-orcid":false,"given":"Ana Paula","family":"Paiva","sequence":"additional","affiliation":[{"name":"Centro de Qu\u00edmica Estrutural (CQE), Faculdade de Ci\u00eancias, Universidade de Lisboa (FCUL), Campo Grande, 1749-016 Lisboa, Portugal"}]}],"member":"1968","published-online":{"date-parts":[[2021,4,17]]},"reference":[{"key":"ref_1","unstructured":"European Commission (2021, January 22). Report on Critical Raw Materials for the EU. European Commissions, Brussels. Available online: https:\/\/eur-lex.europa.eu\/legal-content\/EN\/TXT\/PDF\/?uri=CELEX:52011DC0025&from=EN."},{"key":"ref_2","unstructured":"European Commission (2021, January 22). Report on Critical Raw Materials for the EU. European Commissions, Brussels. 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