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| Separation and recovery of rare earths by in situ selective electrochemical oxidation and extraction from spent fluid catalytic cracking (FCC) catalysts | |
| Zhou, Yujian1; Schulz, Stephen1; Lindoy, Leonard F.2; Du, Hao3; Zheng, Shili3; Wenzel, Marco1; Weigand, Jan J.1 | |
| 2020-06-01 | |
| Source Publication | HYDROMETALLURGY
 |
| ISSN | 0304-386X |
| Volume | 194Pages:11 |
| Abstract | An efficient method for recovering and separating Ce3+ and La3+ rare earth elements from spent fluid catalytic cracking (FCC) catalyst is described. Initially, the spent FCC catalyst was leached with 2 M HNO3 at 80 degrees C then removal of iron from the leach solution was carried out by solvent extraction with 25% (v/v) diisooctyl phosphinic acid (DiOAP) in n-octane. Extraction of the above rare earths was then undertaken from the nitric acid leach solution using an organic phase consisting of 25% (v/v) di(2-ethylhexyl) phosphoric acid (D2EHPA) and 25% (v/v) tri-n-butyl phosphate (TBP) in n-octane. Both rare earths were stripped form the organic phase using H2SO4. Separation of the Ce3+ from La3+ was then achieved by means of an in situ electrochemical oxidation coupled with a simultaneous solvent extraction process. In this, the Ce3+ was electrochemically oxidized to Ce4+ and removed from the aqueous phase by solvent extraction employing 100 mM D2EHPA in n-octane. This led to efficient separation of the above rare earths, giving rise to La3+ in high purity of up to 99.5% and Ce4+ up to 100%. The separation occurs via a single extraction step without the need for pH adjustment or for the use of additional reagents. |
| Keyword | Solvent extraction Rare earths Electrochemistry Electrosynthesis Spent FCC catalyst |
| DOI | 10.1016/j.hydromet.2020.105300 |
| Language | 英语 |
| WOS Keyword | SOLVENT-EXTRACTION ; TETRAVALENT CERIUM ; NITRIC-ACID ; ELEMENTS ; LANTHANUM(III) ; MIXTURES ; SUSTAINABILITY ; KINETICS ; CE(III) ; WASTE |
| Funding Project | China Scholarship Council (CSC)[201706430001] ; European Regional Development Found ; Free State of Saxony (ERDF-InfraPro)[GEPARD-100326379] ; German Research Foundation[WE 4621/4-1/392417756] ; German Federal Ministry of Education and Research (BMBF) within the CLIENT II -Joint Project[033R188A] |
| WOS Research Area | Metallurgy & Metallurgical Engineering |
| WOS Subject | Metallurgy & Metallurgical Engineering |
| Funding Organization | China Scholarship Council (CSC) ; European Regional Development Found ; Free State of Saxony (ERDF-InfraPro) ; German Research Foundation ; German Federal Ministry of Education and Research (BMBF) within the CLIENT II -Joint Project |
| WOS ID | WOS:000537628300014 |
| Publisher | ELSEVIER |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.ipe.ac.cn/handle/122111/40989 |
| Collection | 中国科学院过程工程研究所 |
| Corresponding Author | Weigand, Jan J. |
| Affiliation | 1.Tech Univ Dresden, Fac Chem & Food Chem, D-01062 Dresden, Germany 2.Univ Sydney, Sch Chem, F11, Sydney, NSW 2006, Australia 3.Chinese Acad Sci, Inst Proc Engn, Natl Engn Lab Hydromet Cleaner Prod Technol, Key Lab Green Proc & Engn, Beijing 100190, Peoples R China |
| Recommended Citation GB/T 7714 | Zhou, Yujian,Schulz, Stephen,Lindoy, Leonard F.,et al. Separation and recovery of rare earths by in situ selective electrochemical oxidation and extraction from spent fluid catalytic cracking (FCC) catalysts[J]. HYDROMETALLURGY,2020,194:11. |
| APA | Zhou, Yujian.,Schulz, Stephen.,Lindoy, Leonard F..,Du, Hao.,Zheng, Shili.,...&Weigand, Jan J..(2020).Separation and recovery of rare earths by in situ selective electrochemical oxidation and extraction from spent fluid catalytic cracking (FCC) catalysts.HYDROMETALLURGY,194,11. |
| MLA | Zhou, Yujian,et al."Separation and recovery of rare earths by in situ selective electrochemical oxidation and extraction from spent fluid catalytic cracking (FCC) catalysts".HYDROMETALLURGY 194(2020):11. |
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