Application and Perspective of Ionic Liquids on Rare Earths Green Separation

	Application and Perspective of Ionic Liquids on Rare Earths Green Separation
	Liu YH ; Chen J ; Li DQ
刊名	separation science and technology
	2012
卷号	47 期号:2 页码:223-232
关键词	SOLVENT IMPREGNATED RESIN BIS(2 OCTYLPHENOXY ACETIC-ACID 4 METAL-IONS 4-TRIMETHYLPENTYL)PHOSPHINIC ACID CROWN-ETHERS AQUEOUS-SOLUTIONS SYNERGISTIC EXTRACTION LIQUID/LIQUID EXTRACTION SULFURIC-ACID CHLORIDE
ISSN号	0149-6395
通讯作者	chen j
中文摘要	this review summarizes recent applications of ionic liquids (ils) as 'green' solvents and extractants in the extraction and separation of rare earths (res), which are widely used in a variety of high-tech products in mining, separation, and smelting can greatly damage the environment. conventional imidazolium-based ils as diluents are more active than non-coordinating solvents such as kerosene and n-heptane in the extraction of res including the co-existing thorium. imidazolium cations can be involved in res cation exchange or in forming new complexes with res(iii) ions. quaternary ammonium- and phosphonium-based ils with functional anions could be considered as bifunctional il extractants (bif-iles) for the separation of res due to their following properties: the capacity to undergo facile synthesis route, high extraction ability and selectivity, low acid-base consumption, and easy stripping. the inner synergistic neutral complex extraction of bif-iles will effectively avoid the production of ammonia-nitrogen or high content of na+ or ca2+ in wastewater, which is partly caused by the "saponification" of acidity extractant, such as p507, during the res industrial separation process. the large amount of wastewater production must be prohibited because of "emission standards of pollutants from rare earths industry" promulgated by china's ministry of environment protection (mop) in 2011. serving as extractants, additives, and templates, ils are likewise used in the preparation of functionalized adsorption materials (i.e., sol-gel silica, amberlite xad series resins, il modified merrifield resin). these adsorption materials also show high efficiency in the enrichment of dilute leach liquor of the weathered crust elution-deposited res ore and the enhanced separation of high-value adding heavy res. the huge environmental challenges from highly polluted res hydrometallurgy in china require the greener separation technique to solve these issues, and the novel ils-based separation materials and techniques in both liquid/liquid and liquid/solid extraction and separation of various res resources are expected to demonstrate the potential practical applications in the future.
收录类别	SCI收录期刊论文
语种	英语
WOS记录号	WOS:000302412700006
公开日期	2013-06-30
内容类型	期刊论文
源URL	[http://ir.ciac.jl.cn/handle/322003/48592]
专题	长春应用化学研究所_长春应用化学研究所知识产出_期刊论文
推荐引用方式 GB/T 7714	Liu YH,Chen J,Li DQ. Application and Perspective of Ionic Liquids on Rare Earths Green Separation[J]. separation science and technology,2012,47(2):223-232.
APA	Liu YH,Chen J,&Li DQ.(2012).Application and Perspective of Ionic Liquids on Rare Earths Green Separation.separation science and technology,47(2),223-232.
MLA	Liu YH,et al."Application and Perspective of Ionic Liquids on Rare Earths Green Separation".separation science and technology 47.2(2012):223-232.