Liquid-liquid extraction process of amino acids by a new amide-based functionalized ionic liquid

	Liquid-liquid extraction process of amino acids by a new amide-based functionalized ionic liquid
	Li Huaxi 1; Li Zhuo 1,2; Yin Jingmei 1; Li Changping 1; Chi Yansheng 3; Liu Qingshan 3; Zhang Xiuling 1; Urs, Welz-Biermann 3
刊名	green chemistry
	2012
卷号	14 期号:6 页码:1721-1727
英文摘要	the cost of separation and purification of amino acids accounts for more than 80% of their total production expenditure. thus, investigation into new separation technology is of great importance. in this paper, a new hydrophobic amide-based functionalized ionic liquid ([eimch(2)conhbu]ntf2) was designed and synthesized for the extraction of amino acids. from the preliminary experiments we found that the ionic liquid has a special selectivity for tryptophan (trp) when ph = 0.5, and that its partition coefficient (p-il/w) can reach up to 10.02. subsequently, important factors that affect the extraction process by [eimch(2)conhbu]ntf2 were studied systematically. it was found that the extraction equilibrium could be achieved in 30 min. it was found that ph influences the p-il/w greatly; the smaller the ph value, the higher the p-il/w. when ph > pk(2), the p-il/w is close to zero. with the increase of the volume ratio of the ionic liquid, extraction efficiency increases, while the p-il/w decreases. as for the effect of the initial concentration (c-0) of tryptophan, p-il/w decreases with an increase of c-0 when [eimch(2)conhbu]ntf2 is used as the extractant. from the investigation of the effect of temperature if was found that the extraction process of amino acid by functionalized ionic liquids is exothermic. experiments on the recycling and reuse of [eimch(2)conhbu]ntf2 were also performed, and it was found that the extraction efficiency of [eimch(2)conhbu]ntf2 does not change after four cycles. finally, the mechanisms were probed and the results show that the hydrogen bond formed between the acetyl group of the ionic liquid and the nh2 group of tryptophan accounts for the higher extraction efficiency.
WOS标题词	science & technology ; physical sciences
类目[WOS]	chemistry, multidisciplinary
研究领域[WOS]	chemistry
关键词[WOS]	reactive extraction ; desulfurization ; water ; tryptophan ; solvents ; recovery ; future ; media
收录类别	SCI
语种	英语
WOS记录号	WOS:000304558500024
公开日期	2015-11-17
内容类型	期刊论文
源URL	[http://159.226.238.44/handle/321008/143015]
专题	大连化学物理研究所_中国科学院大连化学物理研究所
作者单位	1.Dalian Univ, Coll Chem Engn & Environm, Dalian, Peoples R China 2.Dalian Ocean Univ, Sch Sci, Dalian, Peoples R China 3.Chinese Acad Sci, Dalian Inst Chem Phys, China Ion Liquid Lab, Dalian, Peoples R China
推荐引用方式 GB/T 7714	Li Huaxi,Li Zhuo,Yin Jingmei,et al. Liquid-liquid extraction process of amino acids by a new amide-based functionalized ionic liquid[J]. green chemistry,2012,14(6):1721-1727.
APA	Li Huaxi.,Li Zhuo.,Yin Jingmei.,Li Changping.,Chi Yansheng.,...&Urs, Welz-Biermann.(2012).Liquid-liquid extraction process of amino acids by a new amide-based functionalized ionic liquid.green chemistry,14(6),1721-1727.
MLA	Li Huaxi,et al."Liquid-liquid extraction process of amino acids by a new amide-based functionalized ionic liquid".green chemistry 14.6(2012):1721-1727.