SEPARATION AND PURIFICATION TECHNOLOGY
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2025
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IF 9
Qichen Shang,Yu Chang,Junjie Wang,Daiwei Gu,Jian Deng,Guangsheng Luo
Countercurrent extraction with extreme phase ratio widely exists in many fields. However, it remains a great challenge for its low efficiency because of poor dispersion and unstable two-phase flow. In this work, we take the extraction of H 2 O 2 from the working solution as an example and develop a novel intensification technology via integrating the annual rotating flow with micro-capillary jetting dispersion. The phase whose volume flow rate is much smaller is ejected into the continuous phase by micro-capillary jetting to form microdroplets. The annular rotating field is introduced to stabilize the flow and reduce the extraction resistance. The microdispersion, two-phase countercurrent flow, and extraction characteristics are systematically studied. The results show that three theoretical stages in 60 cm with an operation capacity of 43.6 m 3 /(m 2 ·h) are successfully achieved when the phase ratio exceeds 50. This new technology may become a general way for extraction intensification with the extreme phase ratio.
研究领域:
化学工程
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环境科学
✓ 已验证
产品关联
DOI
高影响因子
JOM
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2018
·Vol. 70
·期 12
·2837-2845
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IF 2.145
Zhang Weiguang,Zhang Ting-An,Lv Guozhi,Zhou Weihua,Cao Xuejiao,Zhu Hangyu
The solvent extraction and separation process of Sc(III) and Fe(III) from a strongly acidic and highly concentrated ferric solution using mixtures of di(2-ethylhexyl) phosphate (D2EHPA) and tri-n-butyl phosphate (TBP) in sulfonated kerosene was studied. The effects of various parameters, including D2EHPA concentration, dosage of TBP, and phase ratio, were investigated for the extraction process. The results indicated that the extraction rate of Sc(III) was 99.72% with 1.09% Fe(III) co-extracted after two stages of counter-current extraction under optimal conditions. Moreover, saturation capacity and slope analysis were used to determine the reaction mechanism. Sc(III) is extracted in the form of HSc(SO 4 ) 2 ·4HL. Further separation of Sc(III) and Fe(III) was realized in a scrubbing and stripping process. First, 98.67% of the co-extracted iron in the loaded organic phase was scrubbed with a dilute HCl solution by a three-stage counter-current scrubbing. Then, 85.00% of Sc(III) can be stripped efficiently with a 2-mol/L NaOH solution saturated in 1-mol/L NaCl by three-stage cross-current stripping.
研究领域:
化学工程
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分析化学
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环境科学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Cleaner Production
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2017
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IF 5.715
Yirong Feng,Hongbing Song,Meng Xiao,Kaiqiang Lin,Kai Guo,Hengjun Gai
The extractant has a great influence on the performance and economy of the Phenols Recovery processes for treating coal-gasification wastewater. Meanwhile, computer-aided screening techniques have been applied to discern candidate solvents from the molecular perspective. In this paper, mesityl oxide, as a novel extractant, is found with high phenols removal efficiency through quantum chemical calculations. To confirm that, the removal performance with three different solvents (diisopropyl ether (DIPE), methyl isobutyl ketone (MIBK) and mesityl oxide) are investigated and compared via multi-stage counter-current extraction experiments. The experimental results identified that the performance using mesityl oxide as solvent is better than that using DIPE and MIBK. The total phenols concentration can be reduced from more than 5000 mg/L to less than 250 mg/L. Then, Phenols Recovery process using mesityl oxide as solvent is developed and conceptual designed. In view of the better performance and lower cost, mesityl oxide is a very promising extractant for the removal of phenols.
研究领域:
环境工程
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化学工程
·
废水处理
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DOI
高影响因子
HYDROMETALLURGY
·
2023
·
IF 4.7
Xintong Li,Yongna Guo,Xin Ma,Chao Zhang,Jia Yang,Shuai Wang
Herein, a series of α -hydroxyalkyl phosphinic acids were designed and first introduced in Mn 2+ extraction and Mn 2+ -Mg 2+ separation. The extraction tests indicate that the α -hydroxy-2-ethylhexyl phosphinic acid ( α -H-2-EHA) possesses superior extraction ability compared to di-2-ethylhexyl phosphinic acid (P204) for Mn 2+ and Mg 2+ , and the partition coefficient ( β ) is 28.2 at a saponification ratio of 30%. The results of quantum chemical calculation, FT-IR spectrum and slope analysis method reveal that the α -H-2-EHA can form stable four-membered ring structure with metal ions during the extraction process through P–OH and P O bonds. Furthermore, the HOMO composition results suggest that α -OH might also promote the interaction between extractant and metal ions. Finally, a three-stage countercurrent extraction—washing—stripping process was proposed and Mn 2+ can be enriched from 11.2 g/L to 36.6 g/L, with Mg 2+ decreased from 30.3 g/L to 0.6 g/L, which provides an efficient strategy for the preparation of high-purity manganese.
研究领域:
化学工程
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分析化学
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
Desalination and Water Treatment
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2025
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IF 1
Licheng Zhang,Yongming Zhang,Feiyu Kong,Xiaowu Peng,Lijuan Li
This paper presents a novel system and method for the extraction and separation of boron from alkaline solutions. The extraction system consists of a 1:1 molar ratio of 2-octanol and salicylate ester, which effectively extracts boron from the solution. The extraction efficiency of boron increases with the pH of the solution, reaching up to 75% in a single extraction stage when pH > 9. The study also investigates the effects of extraction ratio, extraction time, and extraction temperature on the extraction performance. Under optimized conditions, using natural salt lake brine from Tibet as the raw material, a three-stage countercurrent extraction process can achieve a boron extraction rate of 95%. After subsequent stripping and concentration, boric acid can be directly produced with a purity exceeding 99%. Moreover, the extraction system demonstrates good stability during the extraction-stripping cycle. FT-IR and Raman spectrum were employed to investigate the main functional group of the extraction process, and DFT was used to study the coordination mechanism. This work provides an effective pathway for the comprehensive utilization of boron in alkaline solutions.
研究领域:
化学工程
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湿法冶金
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分离科学
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环境化学
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
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2021
·
IF 7.312
Rujie Li,Wanhang Wang,Yangyang Wang,Xiaoyu Wei,Ziqi Cai,Zhiyong Zhou
A novel ionic liquid named 1-butyl-3-methylimidazolium tetraphenylboron ([Bmim]Bph 4 ) containing a stereo symmetric structure of Bph 4 - was synthesized and used as co-extractants with TBP and CH 2 BrCl as extractant and diluent for selective extraction of lithium ions from salt lake brines with high molar ratio of magnesium to lithium. The effects of extraction conditions containing molar ratio of co-extractant to lithium ion, volume percentage of TBP and O/A phase ratio on extraction performance were investigated. Under the optimal extraction conditions, the maximum separation factor of lithium to magnesium reached up to 2754 after one single-stage extraction process. After four stages of counter-current extraction process, the extraction efficiency of Li + reached up to 99.47%. Then the washing and stripping conditions were optimized with the combination of LiCl and NaCl solution as the washing agent and Na 2 CO 3 solution as the stripping agent. After that, 10 cycles of the whole extraction experiments were carried out and the organic phase exhibited excellent reusability and stability. Since no acid and alkaline were used throughout the extraction process, the novel extraction process is greener and more environmentally friendly than the traditional solvent extraction process.
研究领域:
化学工程
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材料科学
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环境科学
✓ 已验证
DOI
高影响因子
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