PROCESS SAFETY AND ENVIRONMENTAL PROTECTION
·
2017
·
IF 2.905
Jianfeng Song,Xuhong Niu,Xue-Mei Li,Tao He
Hydrophilic nanoporous ion exchange barrier membrane, based on polyethersulfone (PES)/sulfonated polyphenylether sulfone ketone (SPPESK), was utilized for the pH dependent separation of copper and nickel ions with a commercial extractant, LIX84-I. The extraction and stripping performance of the membrane was demonstrated in a single stage membrane contactor as well as in an integrated extraction/stripping system. By adjusting the feed pH to 2.9, a complete separation of copper and nickel was achieved using the membrane contactors, where a copper flux of 1.10 × 10 −8 mol/cm 2 s was observed. In an extraction/stripping integrated sandwiched membrane extraction contactor, significantly higher copper flux was observed due to the coupling of copper stripping. In addition, the PES/SPPESK barrier membrane prevented the loss of the organic extractant, exhibiting high stability in 30 days dynamic test. The results indicated that the membrane extraction contactor system is of great potential for selective extraction of metal ions.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
CHINESE JOURNAL OF CHEMICAL ENGINEERING
·
2023
·
IF 3.8
Kun Wang,Guoquan Zhang,Linye Li,Yuzhang Li,Xiangxin Liao,Pu Cheng,Mingzhi Luo
With the vigorous development of the electronics industry, the consumption of lithium continues to increase, and more lithium needs to be mined to meet the development of the industry. The content of lithium in the solution is much higher than that of minerals, but the interference of impurity ions increases the difficulty of extracting lithium ions. Therefore, we prepared an imidazole-based ionic liquid (1-butyl-3-methylImidazolium bis(trifluoromethyl sulfonyl) imide) (IL) for efficient lithium extraction from aqueous solutions by solvent extraction. Using an extraction consisting of 10% IL, 85% tributyl phosphate (TBP), and 5% dichloroethane and an organic to aqueous phase ratio (O/A) of 2/1, over 64.23% of Li were extracted, and the extraction rate after five-stage extraction could reach more than 96%. The addition of ammonium ions to the solution inhibited the extraction of Ni, and the separation coefficient between lithium and nickel approached infinity, showing a very perfect separation effect. FTIR spectroscopy and slope methods were used to analyze the changes that occurred during extraction, revealing possible extraction mechanisms. In addition, the LiCl solution generated during the preparation of ionic liquids was mixed with the stripping solution, and the battery-grade lithium carbonate was prepared by Na 2 CO 3 precipitation, with a purity of 99.74%. This study provides an efficient and sustainable strategy for recovering lithium from the solution.
研究领域:
化学工程
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF DISPERSION SCIENCE AND TECHNOLOGY
·
2020
·
IF 1.701
Xuejing Qiu,Huiping Hu,Jinpeng Yang,Caixia Wang,Zeying Cheng
The selective removal of copper from the artificial nickel electrolysis anolyte was presented with a novel N-octyl-2-aminomethylpyridine-funcionalized chelating resin (abbreviated as CP-AMPO) in this study. In the single system, the adsorption characters of the CP-AMPO resins for Cu2+ and Ni2+ were examined through pH of solution, concentration of metal ions, contact time and temperature. Through the experimental investigation, the isotherm adsorption behavior of Cu2+ fitted well with Langmuir isotherm, whereas the adsorption behavior of Ni2+ followed the Langmuir and the Freundlich isotherm. The kinetic adsorption parameters were proved to be in agreement with the pseudo-second kinetic model, the thermodynamics data demonstrated the adsorption behaviors of Cu2+ and Ni2+ were a spontaneous and endothermic process. Additionally, from the competitive adsorption in the binary systems, the separation factor of copper/nickel reached 2000, indicating higher selectivity for copper over nickel. Moreover, the residual concentration of copper was less than 3 mg/L at the beginning of 8 BV in the artificial nickel electrolysis anolyte after purification and the mass ratio of copper/nickel exceeded 15 in the saturated resins by the dynamic adsorption curves. The results could well satisfy the production requirement of the nickel electro-refining procedure. Therefore, the CP-AMPO resins could be used as the high-performance adsorbent to remove copper from the nickel electrolysis anolyte in the large-scale industry. Consequently, the extended study of the chelating resin on the mechanisms of selective adsorption for copper and nickel was assessed by X-ray photoelectron spectroscopy (XPS).
研究领域:
化学工程
·
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Materials Research and Technology-JMR&T
·
2020
·
IF 5.289
Junhong Zhang,Lihua Gao,Zhijun He,Xinmei Hou,Wenlong Zhan,Qinghai Pang
An effective strategy to achieve separation and recovery of iron and nickel from low-grade laterite ore via microwave carbothermic reduction roasting is reported. In this work, we determined the underlying reason for the poor separation of iron and nickel during the magnetic separation process. The effect of operating variables on the recovery and separation of nickel and iron from low-grade laterite ore was initially investigated during microwave carbothermic reduction roasting to reveal the underlying reason for their poor separation. Then, the phase transformation and interfacial reduction of fayalite Fe 2 SiO 4 and hortonolite Fe 2− x Mg x SiO 4 in the mineral composition of laterite were systemically investigated via SEM/EDS and XRD analysis to determine the influence of CaO and MgO on the stepwise reduction behavior of Fe 2 SiO 4 . Phase transformation during the microwave carbothermic reduction roasting process by microwave irradiation heating occurred according to the following steps: (Fe,Ni) 2 SiO 4 ( x = 0) and Mg x (Fe,Ni) 2− x SiO 4 (0 ≤ x ≤ 2) → Mg x Ca y (Fe,Ni) 2− x − y SiO 4 (0 ≤ x + y ≤ 2) → Mg x Ca 2− x SiO 4 . Finally, the substituted iron and nickel ions were found to reduce to ferronickel alloy under a reductive atmosphere. The ferronickel alloy with a nickel grade of 7.05 wt.% and an iron grade of 71.70 wt.% was produced successfully from low-grade laterite ores in which the recovery ratios of nickel and iron were 92.44% and 91.17%, respectively. Furthermore, these methods could be extended to the reduction behavior and interfacial reaction of silicates in other ores.
研究领域:
冶金工程
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2024
·
IF 8.1
Xianglong Lei,Jun Tan,Pengfei Zhu,Chaozhen Zheng,Yao Liu,Le Zhang,Jun Luo,Jiugang Hu
Short-process hydrometallurgy is promising for non-traditional resource utilization due to low cost and less consumption, but it presents a great challenge to metal separation of complex leaching solutions. Herein, a bidentate pyridine-pyrazole ligand (BPP) was synthesized to realize the direct extraction of nickel from sulfuric acid leachate of laterite ore. The separation behaviors of nickel over other impurities (Co, Mn, Mg, Al, Ca, Fe, and Zn) were evaluated for the mixtures of BPP and dinonyl naphthalenesulfonic acid (DNNS). This binary system exhibits the synergistic effect on nickel and antagonistic effect on impurities, which improves the selective separation of nickel. The molar ratio of BPP/DNNS, solution pH, extractant concentration, and nickel concentration on metal extraction were investigated. The extraction efficiency of nickel reaches 95.9 % at pH = 2.5, and the separation coefficients of nickel over aluminum, manganese, and iron is 86.2, 95.4, and 69.4 at the optimal DNNS/BPP molar ratio of 1:1, respectively. Furthermore, the component interaction and coordination structure were disclosed through NMR, ATR-IR, XAS, and UV–vis spectroscopies. The mechanism analysis indicated that the exclusion of coordinated water molecules with BPP contributes to the synergistic extraction of nickel, and the intermolecular interaction between DNNS and BPP inhibits the extraction of impurities. Therefore, the pyridine-pyrazole ligand-induced synergistic and antagonistic effects will be helpful to the short process utilization of complex nickel-bearing resources.
研究领域:
冶金化学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）