Comprehensive Extraction Study Using N,N-Dioctyldiglycolamic Acid

Shimojo, Kojiro; Nakai, Ayaka; Okamura, H.; Saito, Takumi; Ohashi, Akiyoshi; Naganawa, Hirochika

doi:10.2116/analsci.30.513

Cited by 21 publications

(11 citation statements)

References 21 publications

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“…However, complete back-extraction of Ru(III) and Pd(II) was difficult using a 1 M HNO 3 solution although back-extraction was possible in the DODGAA system [19]. The other platinum group elements (Rh(III), Os(IV), Ir(III), Pt(IV)) were not extracted at all.…”

Section: Extraction Characteristics Of C 12 Dgaa For 56 Metal Ionsmentioning

confidence: 99%

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A Comprehensive Extraction Study Using a Mono-alkylated Diglycolamic Acid Extractant: Comparison Between a Secondary Amide Group and a Tertiary Amide Group

Sugita

Fujiwara

Okamura

et al. 2017

SERDJ

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The extraction characteristics of N-dodecyldiglycolamic acid (C 12 DGAA), with a secondary amide group, for 56 metal ions have been investigated, and compared with those of N,N-dioctyldiglycolamic acid (DODGAA) with a tertiary amide group. C 12 DGAA is capable of quantitative transfer for a variety of metal ions through a proton-exchange reaction, and the extraction behavior as a function of the aqueous-phase pH is similar for C 12 DGAA and DODGAA. 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 (Hg(II), Pb(II), Cu(II), Cd(II), Zn(II), Mn(II), Co(II), and Ni(II)).

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Section: Extraction Characteristics Of C 12 Dgaa For 56 Metal Ionsmentioning

confidence: 99%

“…Recently, we developed N,N-dioctyldiglycolamic acid (DODGAA, Figure1), which is a carboxylic acid-type extractant with an amide group and an ether oxygen donor [15][16][17][18][19][20][21]. The extractant can be synthesized simply and readily in a single step, which helps to reduce its production cost.…”

Section: Introductionmentioning

confidence: 99%

A Comprehensive Extraction Study Using a Mono-alkylated Diglycolamic Acid Extractant: Comparison Between a Secondary Amide Group and a Tertiary Amide Group

Sugita

Fujiwara

Okamura

et al. 2017

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“…Recently, we developed novel acidic tridentate chelate reagents with a diglycolamic acid (DGAA) framework, which is composed of an amide group and a carboxy group connected by an ether chain [10][11][12][13][14][15][16]. For example, N,N-dioctyldiglycolamic acid (DODGAA, Fig.…”

Section: Introductionmentioning

confidence: 99%

Extraction Behavior of Rare-earth Elements Using a Mono-alkylated Diglycolamic Acid Extractant

Shimojo

Fujiwara

Fujisawa

et al. 2016

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Liquid-liquid extraction of rare-earth (RE) cations has been investigated using N-dodecyldiglycolamic acid (C 12 DGAA) with a secondary amide group, and compared with that using N,N-dioctyldiglycolamic acid (DODGAA) with a tertiary amide group. C 12 DGAA enables quantitative transfer of all RE cations from moderately acidic solution, while being selective toward the heavier RE cations, and performs better than typical carboxylic-acid-type extractants. However, C 12 DGAA provides low extraction performance and separation ability for RE cations compared with DODGAA because of the weaker basicity of the amide oxygen. Slope analysis demonstrated that RE 3+ transfer with C 12 DGAA proceeded through a proton-exchange reaction, forming a 1:3 complex, RE(C 12 DGAA) 3 . Structural characterization by X-ray diffraction revealed that three N-butyldiglycolamic acid (C 4 DGAA) molecules coordinated to the La 3+ central ion in a tridentate fashion and the La 3+ primary coordination sphere consisted of three oxygen atoms from the amide group, three oxygen atoms from the ether group, and three oxygen atoms from the carboxy group.

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“…For rare earth metals, 2‐ethylhexyl phosphonic acid mono 2‐ethylhexyl ether (PC‐88A) and 2‐methyl‐2‐ethylheptanoic acid (Versatic 10) have been used as extractants. A new extractant, N , N ‐dioctyldiglycol amic acid (DODGAA), which has a high affinity for REE ions, has been developed. However, it has been difficult to find an effective extractant for the separation and recovery of Sc.…”

Section: Introductionmentioning

confidence: 99%

Development of novel adsorbent bearing aminocarbonylmethylglycine and its application to scandium separation

Zhao

Baba

Yoshida

et al. 2016

J. Chem. Technol. Biotechnol.

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BACKGROUND Scandium (Sc) is an important metal element in high‐technology industries and the demand for Sc has been increasing annually. However, because metallurgical processes for its purification and recovery are complex, an effective technique for its separation is required. This paper reports on the development of novel adsorbents that are capable of separating Sc efficiently. RESULTS Novel adsorbents were prepared by introducing aminocarbonylmethylglycine functional groups onto two types of support materials, silica gels for determining suitable preparation conditions and an organic resin for practical use. Scandium adsorption and separation were carried out in sulfuric media using these adsorbents. The adsorbents exhibited high selectivity to Sc from Mg, Al, Ca, Cr, Mn, Co and Ni except for Fe(III). Adsorption–desorption experiments were conducted to examine the adsorbent reusability. The adsorbents showed similar results in reuse tests without any obvious loss. CONCLUSIONS Aminocarbonylmethylglycine functional group introduction proved effective and efficient for Sc adsorption. The newly synthesized adsorbents showed high affinity for Sc and Fe(III). Sc was separated selectively from Fe by reducing Fe(III) to Fe(II) because the adsorbent showed no affinity for divalent Fe(II). The new resin based adsorbent can be used for the practical separation of Sc. © 2016 Society of Chemical Industry

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Comprehensive Extraction Study Using N,N-Dioctyldiglycolamic Acid

Cited by 21 publications

References 21 publications

A Comprehensive Extraction Study Using a Mono-alkylated Diglycolamic Acid Extractant: Comparison Between a Secondary Amide Group and a Tertiary Amide Group

A Comprehensive Extraction Study Using a Mono-alkylated Diglycolamic Acid Extractant: Comparison Between a Secondary Amide Group and a Tertiary Amide Group

Extraction Behavior of Rare-earth Elements Using a Mono-alkylated Diglycolamic Acid Extractant

Development of novel adsorbent bearing aminocarbonylmethylglycine and its application to scandium separation

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