Separation of rare earths in nitric acid medium by a novel silica-based pyridinium anion exchange resin

Arai, Tsuyoshi; Wei, Yuezhou; Kumagai, Mikio; Horiguchi, Kenichi

doi:10.1016/j.jallcom.2004.11.092

Cited by 26 publications

(9 citation statements)

References 9 publications

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“…The composite support (SiO 2 -P) with mean diameter of 50-100 μm (0.6 μm pore size, and 0.69 pore fraction) was obtained by copolymerization of styrene with divinylbenzene (SDB) and immobilized on SiO 2 particles (silica content was close to 17-18 wt%) [36,37]. One hundred g of silica particles was placed in a rotary evaporator flask and dried in vacuum for 60 min (under a pressure lower than 3000 Pa); air was then purged with a N 2 stream for 30 min.…”

Section: Preparation Of Pan/sio 2 Resinmentioning

confidence: 99%

Amidoxime functionalization of a poly(acrylonitrile)/silica composite for the sorption of Ga(III) – Application to the treatment of Bayer liquor

Chen

Hamza

et al. 2019

Chemical Engineering Journal

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Successful amidoximation of SiO 2 / polyacrylonitrile composite (SiO 2 / PAO).• PAO/SiO 2 highly efficient for Ga (III) recovery from slightly acidic solution.• Ga(III) desorption using 0.5 M HCl solutions for sorbent recycling.• PAO/SiO 2 sorbent is selective for Ga(III) recovery from multi-metal solutions.• Ga(III) efficiently and selectively recovered from Bayer liquor using SiO 2 / PAO.

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Section: Preparation Of Pan/sio 2 Resinmentioning

confidence: 99%

Amidoxime functionalization of a poly(acrylonitrile)/silica composite for the sorption of Ga(III) – Application to the treatment of Bayer liquor

Chen

Hamza

et al. 2019

Chemical Engineering Journal

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“…Due to the partial nitrogen electron delocalization nature, the pyridinium group containing anion exchange membranes exhibited enhanced chemical and oxidative stability in acid medium compared to quaternary ammonium groups. [30][31][32] In our previous works, a series of chloromethylated poly(phthalazinone ether)s were synthesized, and membranes with quaternary ammonium groups for VRB applications were prepared. [22][23][24]33,34 The resulting anion exchange membranes exhibited promising performances and lower permeability of vanadium ions in VRB.…”

Section: Introductionmentioning

confidence: 99%

Poly(phthalazinone ether ketone ketone) anion exchange membranes with pyridinium as ion exchange groups for vanadium redox flow battery applications

Zhang

Xing

et al. 2013

J. Mater. Chem. A

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Poly(phthalazinone ether ketone ketone) anion exchange membranes with pyridinium as anion exchange groups (PyPPEKK) were prepared by reacting chloromethylated poly(phthalazinone ether ketone ketone) membranes with pyridine in solution. The reaction conditions including diluent solvents, pyridine concentration, reaction time and temperature were investigated. Under the optimized reaction condition, PyPPEKK anion exchange membranes with IEC values in the range of 0.96-1.55 mmol g À1 and water uptake in the range of 10.2-16.5% were obtained. The swelling ratio of PyPPEKK membranes in deionized water and VOSO 4 solution were in the range of 3.2-10.6% and 2.5-7.8%, respectively.PyPPEKK membranes showed good chemical stability in VO 2 + solution. Notably, PyPPEKK membranes had higher coulombic efficiencies of VRB and much lower vanadium permeability compared with Nafion117 membrane. The energy efficiency of VRB with PyPPEKK membrane reached 83.6% at 80 mA cm À2 while the energy efficiency of VRB with Nafion117 membrane was 80.7% at the same chargedischarge current density. Furthermore, PyPPEKK membrane exhibited good performance in the 100cycle charge-discharge VRB test.

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“…There are many reports on chromatographic techniques describing the separation of samarium and neodymium. Some of the recent results on samarium and neodymium separation by chromatographic techniques have been reported by Stray and Dahlgren, 6 Arai et al, 7 Miranda Jr. et al, 8 Pin et al, 9 Schwantes et al, 10 Tsuyoshi and Akiba, 11 etc. However, the chromatographic methods require exhaustive instrumentation, chemical treatment and are time consuming.…”

Section: Introductionmentioning

confidence: 91%

Separation of samarium and neodymium: a prerequisite for getting signals from nuclear synthesis

Maji

Lahiri

Wierczinski

et al. 2006

Analyst

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(146)Sm (T(1/2) = 10(8) y) is a long-lived radionuclide which has been produced in significant amounts during burning in a supernova (SN). Detection of this SN produced long-lived radionuclide on Earth may be helpful for getting information on nuclear synthesis at the time of our solar system's formation. Only accelerator mass spectrometry (AMS) can determine such minute traces of (146)Sm still expected in the Earth's crust. However, the villain of (146)Sm measurement through AMS is its naturally occurring stable isobar (146)Nd which is a million times more abundant than the trace amount of (146)Sm. Therefore an efficient method for the separation of samarium and neodymium is required to measure (146)Sm through AMS. A simple liquid-liquid extraction (LLX) based method for separation of samarium and neodymium has been developed using radiometric simulation. Di-(2-ethylhexyl)phosphoric acid (HDEHP) has been used as the organic reagent. A very high separation factor ( approximately 10(6)) can be achieved when a solution containing samarium and neodymium is reduced by hydroxylamine hydrochloride followed by extraction with 0.1% HDEHP diluted in cyclohexane from 0.025 M HCl solution.

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Separation of rare earths in nitric acid medium by a novel silica-based pyridinium anion exchange resin

Cited by 26 publications

References 9 publications

Amidoxime functionalization of a poly(acrylonitrile)/silica composite for the sorption of Ga(III) – Application to the treatment of Bayer liquor

Amidoxime functionalization of a poly(acrylonitrile)/silica composite for the sorption of Ga(III) – Application to the treatment of Bayer liquor

Poly(phthalazinone ether ketone ketone) anion exchange membranes with pyridinium as ion exchange groups for vanadium redox flow battery applications

Separation of samarium and neodymium: a prerequisite for getting signals from nuclear synthesis

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