A Comprehensive extraction study using a mono-alkylated diglycolamic acid extractant; Comparison between a secondary amide group and a tertiary amide group

Sugita, Tsuyoshi ; Fujiwara, Iori*; Okamura, Hiroyuki ; Oshima, Tatsuya*; Baba, Yoshinari*; Naganawa, Hirochika ; Shimojo, Kojiro

We investigated an influence of amide group in diglycolamic acid-type extractants on extraction property of metal ions. The extraction characteristics of -dodecyldiglycolamic acid (C $_{12}$ DGAA), with a secondary amide group, for 56 metal ions have been investigated, and compared with those of -dioctyldiglycolamic acid (DODGAA) with a tertiary amide group. Compared with DODGAA, C $_{12}$ DGAA has a poor extraction performance and separation ability for rare-earth metal ions, except for Sc(III). However, C $_{12}$ DGAA tended to provide better extraction for relatively small-sized metal ions than DODGAA. In addition, it was found that C $_{12}$ DGAA enables the selective removal of Hg(II) from aqueous solutions containing various divalent metal ions.

Language	:	English
Journal	:	Solvent Extraction Research and Development, Japan
Volume	:	24
Number	:	2
Pages	:	p.61 - 69
Publication Year/Month	:	2017/05
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Paper URL	:	http://www.solventextraction.gr.jp/serdj/jurnalpdf/vol24(2)/24_61.pdf
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Registration No. : AA20170049
JAEA Abstracts No. : 45000641
Paper Submission No. : 18908

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