The Solvent Extraction of Boron with Synthesized Aliphatic 1,3‐Diols: Stripping and Extraction Behavior of Boron by 2,2,5‐Trimethyl‐1,3‐hexanediol

Karakaplan, Mehmet; Tural, Servet; Tural, Bilsen; Turgut, Yılmaz; Hoşgören, Halil

doi:10.1081/sei-200037400

Cited by 25 publications

(18 citation statements)

References 25 publications

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“…B was found to be leached quantitatively at all S/L ratios investigated. For complete extraction of B from the leachate, aliphatic 1,3-diols can be used [35]. the leaching efficiency of REEs was accompanied by the co-leaching of Fe, B, and Co into the solution.…”

Section: Solid To Liquid Ratio Studymentioning

confidence: 99%

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Leaching and Recovery of Rare-Earth Elements from Neodymium Magnet Waste Using Organic Acids

Gergorić

Ravaux²,

Steenari

et al. 2018

Metals

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Over the last decade, rare-earth elements (REEs) have become critical in the European Union (EU) in terms of supply risk, and they remain critical to this day. End-of-life electronic scrap (e-scrap) recycling can provide a partial solution to the supply of REEs in the EU. One such product is end-of-life neodymium (NdFeB) magnets, which can be a feasible source of Nd, Dy, and Pr. REEs are normally leached out of NdFeB magnet waste using strong mineral acids, which can have an adverse impact on the environment in case of accidental release. Organic acids can be a solution to this problem due to easier handling, degradability, and less poisonous gas evolution during leaching. However, the literature on leaching NdFeB magnets waste with organic acids is very scarce and poorly investigated. This paper investigates the recovery of Nd, Pr, and Dy from NdFeB magnets waste powder using leaching and solvent extraction. The goal was to determine potential selectivity between the recovery of REEs and other impurities in the material. Citric acid and acetic acid were used as leaching agents, while di-(2-ethylhexyl) phosphoric acid (D2EHPA) was used for preliminary solvent extraction tests. The highest leaching efficiencies were achieved with 1 mol/L citric acid (where almost 100% of the REEs were leached after 24 h) and 1 mol/L acetic acid (where >95% of the REEs were leached). Fe and Co—two major impurities—were co-leached into the solution, and no leaching selectivity was achieved between the impurities and the REEs. The solvent extraction experiments with D2EHPA in Solvent 70 on 1 mol/L leachates of both acetic acid and citric acid showed much higher affinity for Nd than Fe, with better extraction properties observed in acetic acid leachate. The results showed that acetic acid and citric acid are feasible for the recovery of REEs out of NdFeB waste under certain conditions.

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Section: Solid To Liquid Ratio Studymentioning

confidence: 99%

“…B was found to be leached quantitatively at all S/L ratios investigated. For complete extraction of B from the leachate, aliphatic 1,3-diols can be used [35].…”

Section: Solid To Liquid Ratio Studymentioning

confidence: 99%

Leaching and Recovery of Rare-Earth Elements from Neodymium Magnet Waste Using Organic Acids

Gergorić

Ravaux²,

Steenari

et al. 2018

Metals

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“…The samples were mixed with 10 mL aqueous solutions of 5.0 mg/L H3BO3 for 30 min and shaken manually for 1 -2 min and then placed on a shaker for 30 min at room temperature. After sorption, the supernatant was obtained by magnetic separation with the help of the permanent magnet and analyzed using a Varian Cary 100 UV-VIS Spectrophotometer at 414 nm with azomethine-H as a colorimetric reagent according to the modified method described in elsewhere [26,27]. The pH of the boric acid suspensions were adjusted with 0.1 M NaOH and 0.1 M HCl using a pH meter.…”

Section: Typical Procedures For Boron Sorption Studiesmentioning

confidence: 99%

Separation and Preconcentration of Boron with a Glucamine Modified Novel Magnetic Sorbent

Tural¹

2010

CLEAN Soil Air Water

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A novel, simple method based on magnetic separation was developed for analytical purposes. In this method, N-methyl-D-glucamine (NMDG) modified magnetic microparticles that were synthesized by using the sol-gel method were used for the selective extraction and preconcentration of boron from aqueous solutions. This method combines the simplicity and selectivity of solvent extraction with the easy separation of magnetic microparticles from a solution with a magnet without any preliminary filtration step. The structure of the prepared c-Fe 2 O 3 -SiO 2 -NMDG (magnetic sorbent) composites were characterized by using X-ray diffraction (XRD), Transmission Electron Microscopy (TEM), and Fourier Transform Infrared Spectroscopy (FTIR). The influence of different parameters on the sorbent capacity, such as the sorption/desorption of boron, magnetic sorbent dosage, pH, equilibrium time, type, and amount of stripping solution, were evaluated by using the magnetic sorbent. Any equilibrium pH greater than 6 can be used for sorption. Desorption from the sorbent was carried out by using 1.0 M HCl. The sorption and desorption efficiency of the c-Fe 2 O 3 -SiO 2 -NMDG was found as 92.5 l 0.5% and 99.8 l 6%, respectively.

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“…Narbutt et al [21] used 2-ethyl-1,3-hexanediol and 2-ethyl-2-butyl-1,3-propanediol to extract boron from radioactive corrosion and fission products dissolved in aqueous solutions. Karakaplan et al [22] synthesized 9 different 1,3-diols and compared the boron extraction effects of the synthesized extractants, in which 2,2,4-trimethyl-1,3-pentanediol and 2,2,5-trimethyl-1,3-hexanediol had a high extraction effect. The results showed that the extractant had good extraction performance for boric acid, with a single-stage extraction rate of >95%.…”

Section: Introductionmentioning

confidence: 99%

Recovery of boron from unacidified salt lake brine by solvent extraction with 2,2,4-trimethyl-1,3-pentanediol

Peng

Dong

Zhang

et al. 2020

Preprint

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The recovery of boron from salt lake brine using 2,2,4-trimethyl-1,3-pentanediol was investigated. Factors affecting boron recovery, including pH, concentrations of extractant and H3BO3, phase ratio(O/A), and temperature, were investigated. Increasing pH initially resulted in high extraction rate, but there was a limitation, as further increasing pH resulted in rapid formation of B[OH]4-having a low capacity to complex with TMPD, and therefore lower boron extraction. Boron recovery increased as the TMPD and O/A increased. The combination of pH <7, O/A=1 & n(TMPD/H3BO3)=2:1 was ideal for boron recovery, resulting in extraction efficiency of >85%. To investigate extraction mechanism, slope ratio method was combined with Raman and infrared spectroscopy to characterize the structure of complex. Furthermore, under optimal conditions, a three-stage extraction and two-stage stripping process was performed, resulting extraction and stripping efficiency were 97.12% and 88.98%, respectively. The results reveal a promising strategy of boron recovery from SL brine without acidification.

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The Solvent Extraction of Boron with Synthesized Aliphatic 1,3‐Diols: Stripping and Extraction Behavior of Boron by 2,2,5‐Trimethyl‐1,3‐hexanediol

Cited by 25 publications

References 25 publications

Leaching and Recovery of Rare-Earth Elements from Neodymium Magnet Waste Using Organic Acids

Leaching and Recovery of Rare-Earth Elements from Neodymium Magnet Waste Using Organic Acids

Separation and Preconcentration of Boron with a Glucamine Modified Novel Magnetic Sorbent

Recovery of boron from unacidified salt lake brine by solvent extraction with 2,2,4-trimethyl-1,3-pentanediol

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