Study on mass transfer behavior of extracting La(III) with EHEHPA (P507) using rectangular cross-section microchannel

Yin, Shaohua; Pei, Jiannan; Peng, Jinhui; Zhang, Libo; Srinivasakannan, C.

doi:10.1016/j.hydromet.2017.10.027

Cited by 35 publications

(5 citation statements)

References 29 publications

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“…On the basis of our previous experiments, the optimal experimental results can be obtained by using the Y-junction microreactor and T-junction microreactor with the dimensions of 12.5 cm × 300 μm × 100 μm and 1/16 in. × 100 cm, respectively . The details are discussed in the following sections.…”

Section: Resultsmentioning

confidence: 99%

“…Hou et al studied the extraction of Pr(III) in chloride acidic solution by using membrane dispersion microextractors, wherein the extraction efficiency reached almost 100% in 2 s at the optimal conditions. Recently, our research group also studied the extraction and separation of light rare earths (La, Ce, Pr, and Nd) in the presence of complexing agent in the Y-junction microreactor and reported considerable separation factors and mass-transfer coefficient in comparison to those of the traditional extraction process. − All these published studies in the literature prove that microfluidic extraction technology is highly efficient and environmentally friendly, which has a promising prospect in the modern industry. As a late-model low-cost technology, microfluidics technology is applied to this experiment that can effectively solve high extractant consumption in the conventional solvent extraction process.…”

Section: Introductionmentioning

confidence: 97%

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Liquid–Liquid Extraction of Yttrium(III) Using 2-Ethylhexyl Phosphonic Acid Mono-2-ethylhexyl (EHEHPA) in a Microreactor: A Comparative Study

Guo

Khan

et al. 2018

ACS Sustainable Chem. Eng.

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Experiments were carried out in a slug flow microreactor to systematically investigate reaction behavior under variation of flow rate, and a comparative study was made. Y-junction microreactor and T-junction microreactor have been used to extract yttrium(III) using 2-ethylhexyl phosphonic acid mono-2-ethylhexyl (EHEHPA or P507). Results show that the maximum extraction efficiency of 90.4% in both microreactors could be achieved corresponding to the minimum flow rate of 10 and 100 μL/min. The values of specific interfacial area remain unchanged with the increase of flow rate, and the specific interfacial area of the Y-junction serpentine microreactor is much higher than that of the Tjunction microreactor. Maximum values of volumetric mass-transfer coefficient (1.642 s −1 ) in the Y-junction microreactor are found to be several orders of magnitude higher than those of the T-junction microchannel (0.043 s −1 ) and conventional extractors (0.0197 s −1 ).

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 97%

Liquid–Liquid Extraction of Yttrium(III) Using 2-Ethylhexyl Phosphonic Acid Mono-2-ethylhexyl (EHEHPA) in a Microreactor: A Comparative Study

Guo

Khan

et al. 2018

ACS Sustainable Chem. Eng.

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“…The extraction‐reaction can be completed within 1.5 s using the microfluidic device with the efficiency of 98.55%. Yin and his co‐authors have separated rare‐earth elements (Ce, Pr, La) from chloride solution in the slug flow microreactor. The experimental results show that the microfluidic extractor has better mass transfer, and the volumetric mass transfer coefficient ( k L α) is several orders of magnitude than conventional reactor.…”

Section: Background and Originality Contentmentioning

confidence: 99%

Green Effectively Enhanced Extraction to Produce Yttrium(III) in Slug Flow Microreactor

Guo

Chen

et al. 2020

Chin. J. Chem.

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of main observation and conclusion Process reinforcement research was carried out in Y-junction slug flow microreactors under variable conditions, using EHEHPA (2-ethylhexyl phosphonic acid mono-2-ethylhexyl) to extract yttrium(III) from hydrochloric acid solution. The influence of pH and flow rate on the extraction-reaction efficiency, slug size, mass transfer performance was assessed. The experimental results showed that maximum extraction-reaction efficiency of 91.85% can be achieved in the smallest microreactor (residence time is 11.25 s), which was significantly higher than traditional extraction requiring more than 10 min. The slug length tended to decrease with the increase of pH and flow rate. Volumetric mass transfer coefficients for the slug flow microreactors were found to be in the range of 1.39×10 −1 -1.642 s −1 that is several orders of magnitude higher as compared to traditional extractors, which testified the beneficial effects of Y-junction slug flow microreactor. Significant mass transfer reinforcement has prompted the use of microreactor as a suitable alternative to traditional extractors, which can advantageously improve the economic and environmental development of mineral processing. www.cjc.wiley-vch.deHe et al.

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“…In recent years, many studies on passive microextractors have been reported. However, to date, most of these studies have focused on ordered flow microextractors such as droplet, slug, and laminar flow microextractors, ,− and little attention has been paid to disordered flow microextractors. , In droplet microextractors, to generate ordered droplets, the flow rate of the dispersed phase should be much lower than that of the continuous phase. As for the slug flow microextractors, − the slugs are often produced at small total flow rates with appropriate flux ratios.…”

Section: Introductionmentioning

confidence: 99%

“…Furthermore, another crucial problem needs to be addressed in practice. All the above-mentioned microextractors − involve cocurrent microextraction, in which the mass transfer limit is determined by the phase equilibrium. As a result, only one equilibrium stage can be achieved, resulting in a low extraction efficiency.…”

Section: Introductionmentioning

confidence: 99%

Design Guideline for Passive Microextractors: From Cocurrent Flow to Countercurrent Flow

Xie

Jing

2019

Ind. Eng. Chem. Res.

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Passive countercurrent microextractors with high throughputs have potentially broad applications in industrialscale solvent extraction and hazardous waste disposal. To date, no design guideline has been available for developing such microextractors based on passive cocurrent microextractors. In this study, an oscillating feedback microextractor was chosen as an example system to provide a clear roadmap for bridging the gap between passive co-and countercurrent microextractors and achieving high-throughput countercurrent microextraction. Four steps were necessary, namely, (1) determination of the countercurrent flow arrangement strategy, (2) selection and modification of a primary passive cocurrent microextractor, (3) establishment of a passive single-unit countercurrent microextractor, and (4) parallelization of the passive single-unit countercurrent microextractor with the aim of achieving high throughput. The development from a passive cocurrent microextractor to a passive and high-throughput countercurrent microextractor was demonstrated using the oscillating feedback microextractor.

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Study on mass transfer behavior of extracting La(III) with EHEHPA (P507) using rectangular cross-section microchannel

Cited by 35 publications

References 29 publications

Liquid–Liquid Extraction of Yttrium(III) Using 2-Ethylhexyl Phosphonic Acid Mono-2-ethylhexyl (EHEHPA) in a Microreactor: A Comparative Study

Liquid–Liquid Extraction of Yttrium(III) Using 2-Ethylhexyl Phosphonic Acid Mono-2-ethylhexyl (EHEHPA) in a Microreactor: A Comparative Study

Green Effectively Enhanced Extraction to Produce Yttrium(III) in Slug Flow Microreactor

Design Guideline for Passive Microextractors: From Cocurrent Flow to Countercurrent Flow

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