Chemical Kinetics and Reaction Mechanisms in Solvent Extraction: New Trends and Applications

El-Hefny, N.E.

doi:10.21315/jps2017.28.1.10

Cited by 14 publications

(1 citation statement)

References 88 publications

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“…The new insights at the molecular level can be used to predict the applicability of the new natural-based oxime in industrial processes. The overall kinetics of the solvent extraction process is controlled by chemical reactions and diffusion through interfacial film [26]. Consequently, the results are interpreted in these reaction kinetics and diffusion.…”

Section: Discussionmentioning

confidence: 99%

Comparison between Cashew-Based and Petrochemical Hydroxyoximes: Insights from Molecular Simulations

Nguyen¹,

Phan

Hoang

et al. 2023

Molecules

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Solvent extraction has been ubiquitously used to recover valuable metals from wastes such as spent batteries and electrical boards. With increasing demands for energy transition, there is a critical need to improve the recycling rate of critical metals, including copper. Therefore, the sustainability of reagents is critical for the overall sustainability of the process. Yet, the recycling process relies on functional organic compounds based on the hydroxyoxime group. To date, hydroxyoxime extractants have been produced from petrol-based chemical feedstocks. Recently, natural-based cardanol has been used to produce an alternative hydroxyoxime. The natural-based oxime has been employed to recover valuable metals (Ga, Ni, Co) via a liquid/liquid extraction process. The natural compound has a distinctive structure with 15 carbons in the alkyl tail. In contrast, petrol-based hydroxyoximes have only 12 or fewer carbons. However, the molecular advantages of this natural-based compound over the current petrol-based ones remain unclear. In this study, molecular dynamics simulation was employed to investigate the effect of extractant hydrocarbon chains on the extraction of copper ions. Two hydroxyoxime extractants with 12 and 15 carbons in the alkyl chain were found to have similar interactions with Cu2+ ions. Yet, a slight molecular binding increase was observed when the carbon chain was increased. In addition, lengthening the carbon chain made the extracting stage easier and the stripping stage harder. The binding would result in a lower pH in the extraction step and a lower pH in the stripping step. The insights from this molecular study would help design the extraction circuit using natural-based hydroxyoxime extractants. A successful application of cashew-based cardanol will improve the environmental benefits of the recycling process. With cashew-producing regions in developing countries, the application also improves these regions’ social and economic sustainability.

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Section: Discussionmentioning

confidence: 99%

Comparison between Cashew-Based and Petrochemical Hydroxyoximes: Insights from Molecular Simulations

Nguyen¹,

Phan

Hoang

et al. 2023

Molecules

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Taguchi optimization and life cycle assessment of biodiesel production from spent ground coffee

Bui

Quoc

Duong

et al. 2021

Environ Dev Sustain

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In this study, Vietnamese spent coffee ground (SCG) were subjected to produce biodiesel for fuel application. The extraction processes were conducted with three organic solvents, i.e., hexane, petroleum ether and dimethyl ether. The extraction oil seems to be favored in hexane solvent (17.06%) as compared with petroleum ether (16.62%) and dimethyl ether (16.18%). The extraction processes tend to sufficiently follow the empirical hyperbolic model with R 2 of 0.973, 0.970 and 0.969 for hexane, petroleum ether, and dimethyl ether. The transesterification was optimized using Taguchi design with three variable molar ratios of MeOH and extracted oil (MeOH/EO), catalyst (NaOH) concentration and temperature. The transesterification reached the best yield 76.23% at MeOH of 6:1, NaOH of 0.75 wt% and temperature of 55 °C. Some acquired biodiesel quality was determined within the American Society for Testing and Materials and European standards (EN) norms for biodiesel. Life cycle assessment was also performed to evaluate the impact of the SCG biodiesel production; the industrial process was designed based on laboratory tests aimed with TRACI 2.1 tool. The obtained results indicated that oil extraction is the most effective on biodiesel production, contributing to global warming around 21.04 kg CO 2 eq/kg.

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Solvent extraction kinetics of Ag(I) with methyl ketonic p-tert-octylcalix[4]arene in the modified Lewis cell technique

Kim

Morisada

Kawakita

et al. 2018

J Incl Phenom Macrocycl Chem

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Chemical Kinetics and Reaction Mechanisms in Solvent Extraction: New Trends and Applications

Cited by 14 publications

References 88 publications

Comparison between Cashew-Based and Petrochemical Hydroxyoximes: Insights from Molecular Simulations

Comparison between Cashew-Based and Petrochemical Hydroxyoximes: Insights from Molecular Simulations

Taguchi optimization and life cycle assessment of biodiesel production from spent ground coffee

Solvent extraction kinetics of Ag(I) with methyl ketonic p-tert-octylcalix[4]arene in the modified Lewis cell technique

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