Separation and recovery of rare earths by in situ selective electrochemical oxidation and extraction from spent fluid catalytic cracking (FCC) catalysts

doi:10.1016/j.hydromet.2020.105300

	Separation and recovery of rare earths by in situ selective electrochemical oxidation and extraction from spent fluid catalytic cracking (FCC) catalysts
	Zhou, Yujian 3; Schulz, Stephen 3; Lindoy, Leonard F.1; Du, Hao 2; Zheng, Shili 2; Wenzel, Marco 3; Weigand, Jan J.3
刊名	HYDROMETALLURGY
	2020-06-01
卷号	194 页码:11
关键词	Solvent extraction Rare earths Electrochemistry Electrosynthesis Spent FCC catalyst
ISSN号	0304-386X
DOI	10.1016/j.hydromet.2020.105300
英文摘要	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.
资助项目	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关键词	SOLVENT-EXTRACTION ; TETRAVALENT CERIUM ; NITRIC-ACID ; ELEMENTS ; LANTHANUM(III) ; MIXTURES ; SUSTAINABILITY ; KINETICS ; CE(III) ; WASTE
WOS研究方向	Metallurgy & Metallurgical Engineering
语种	英语
出版者	ELSEVIER
WOS记录号	WOS:000537628300014
资助机构	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
内容类型	期刊论文
源URL	[http://ir.ipe.ac.cn/handle/122111/40988]
专题	中国科学院过程工程研究所
通讯作者	Weigand, Jan J.
作者单位	1.Univ Sydney, Sch Chem, F11, Sydney, NSW 2006, Australia 2.Chinese Acad Sci, Inst Proc Engn, Natl Engn Lab Hydromet Cleaner Prod Technol, Key Lab Green Proc & Engn, Beijing 100190, Peoples R China 3.Tech Univ Dresden, Fac Chem & Food Chem, D-01062 Dresden, Germany
推荐引用方式 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.