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Extraction of rare earths using bubbling organic liquid membrane with un-saponified P507
Liu, Jie1; Huang, Kun1,2; Wu, Xiaohong1; Liu, Wenqian1; Song, Weiyuan2; Liu, Huizhou1,2
2018
Source PublicationHYDROMETALLURGY
ISSN0304-386X
Volume175Pages:340-347
AbstractExtraction and enrichment of low-concentration rare earths from the in-situ leaching solutions of ion-absorbing type rare-earth ores using bubbling organic liquid membrane with un-saponified P507 was investigated. Experimental results revealed that saponification of P507 extractant are unnecessary for extraction of rare earths using bubbling organic liquid membrane. The equilibrium pH of the aqueous solutions flowing out from the extraction column would not decrease obviously, because the total volume of un-saponified P507 contacting with the aqueous phase in the column was very small, and the aqueous-to-organic phase ratios could be very large. Therefore, the loading capacity of rare-earth ions in the organic phase have no obvious changes, compared to that using saponified P507. Scale-up experiments in the pilot-scale columns connected in cascade for continuous countercurrent extraction of low-concentration rare earths about 100 mg/L in the leaching solutions demonstrated that, the final residual concentrations of rare earths remained below 3.0 mg/L, while total recovery of rare earths after extraction and stripping processes could reach above 90%. Bubbling organic liquid membrane extraction is in fact an interfacial chemical reaction of rare-earth ions with un-saponified P507 adsorbing at the surface of organic liquid membrane. During countercurrent extraction processes, shearing interaction of the aqueous solutions with dispersed organic bubbles rising in the extraction column would result in continuous exposure of fresh surface of organic bubbles, which is a main driving force to promote the mass transferring and enrichment of rare-earth ions into the organic liquid membrane layer.
KeywordSaponification Rare Earths P507 Bubbling Organic Liquid Membrane Extraction Rare-earth Ion-absorbing Ore
SubtypeArticle
WOS HeadingsScience & Technology ; Technology
DOI10.1016/j.hydromet.2017.12.015
Indexed BySCI
Language英语
WOS KeywordIONIC LIQUID ; SOLVENT-EXTRACTION ; SEPARATION ; STRATEGY ; ELEMENTS ; ORE ; PRECIPITATION ; TOWER ; PHASE
WOS Research AreaMetallurgy & Metallurgical Engineering
WOS SubjectMetallurgy & Metallurgical Engineering
Funding OrganizationNational Natural Science Foundation of China(51574213 ; Key Project of Chinese National Programs for Fundamental Research and Development (973 Programs)(2012CBA01203 ; 21606248 ; 2013CB632602) ; 51074150)
WOS IDWOS:000423644800043
Citation statistics
Cited Times:4[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.ipe.ac.cn/handle/122111/23982
Collection湿法冶金清洁生产技术国家工程实验室
Affiliation1.Chinese Acad Sci, Qingdao Inst Bioenergy & Bioproc Technol, CAS Key Lab Biobased Mat, Qingdao 266100, Peoples R China
2.Chinese Acad Sci, Inst Proc Engn, CAS Key Lab Green Proc & Engn, Beier Jie 1, Beijing 100190, Peoples R China
Recommended Citation
GB/T 7714
Liu, Jie,Huang, Kun,Wu, Xiaohong,et al. Extraction of rare earths using bubbling organic liquid membrane with un-saponified P507[J]. HYDROMETALLURGY,2018,175:340-347.
APA Liu, Jie,Huang, Kun,Wu, Xiaohong,Liu, Wenqian,Song, Weiyuan,&Liu, Huizhou.(2018).Extraction of rare earths using bubbling organic liquid membrane with un-saponified P507.HYDROMETALLURGY,175,340-347.
MLA Liu, Jie,et al."Extraction of rare earths using bubbling organic liquid membrane with un-saponified P507".HYDROMETALLURGY 175(2018):340-347.
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