scholarly journals Selective recovery of zinc from goethite residue in the zinc industry using deep-eutectic solvents

RSC Advances ◽  
2020 ◽  
Vol 10 (12) ◽  
pp. 7328-7335 ◽  
Author(s):  
Nerea Rodriguez Rodriguez ◽  
Lieven Machiels ◽  
Bieke Onghena ◽  
Jeroen Spooren ◽  
Koen Binnemans
Keyword(s):  
Levulinic Acid ◽  
Choline Chloride ◽  
Deep Eutectic Solvents ◽  
Selective Recovery ◽  
Industrial Residues ◽  
Zinc Industry

A mixture of levulinic acid and choline chloride can be used to selectively leach zinc from industrial residues with iron-rich matrices.

scholarly journals A Comprehensive Study of CO2 Absorption and Desorption by Choline-Chloride/Levulinic-Acid-Based Deep Eutectic Solvents

Molecules ◽  
2021 ◽  
Vol 26 (18) ◽  
pp. 5595
Author(s):  
Mohaned Aboshatta ◽  
Vitor Magueijo
Keyword(s):  
Hydrogen Bond ◽  
Co2 Capture ◽  
Levulinic Acid ◽  
Choline Chloride ◽  
Deep Eutectic Solvents ◽  
Absorption Capacity ◽  
Co2 Absorption ◽  
Operating Pressure ◽  
Hydrogen Bond Acceptor ◽  
Different Temperatures

Amine absorption (or amine scrubbing) is currently the most established method for CO2 capture; however, it has environmental shortcomings and is energy-intensive. Deep eutectic solvents (DESs) are an interesting alternative to conventional amines. Due to their biodegradability, lower toxicity and lower prices, DESs are considered to be “more benign” absorbents for CO2 capture than ionic liquids. In this work, the CO2 absorption capacity of choline-chloride/levulinic-acid-based (ChCl:LvAc) DESs was measured at different temperatures, pressures and stirring speeds using a vapour–liquid equilibrium rig. DES regeneration was performed using a heat treatment method. The DES compositions studied had ChCl:LvAc molar ratios of 1:2 and 1:3 and water contents of 0, 2.5 and 5 mol%. The experimental results showed that the CO2 absorption capacity of the ChCl:LvAc DESs is strongly affected by the operating pressure and stirring speed, moderately affected by the temperature and minimally affected by the hydrogen bond acceptor (HBA):hydrogen bond donator (HBD) molar ratio as well as water content. Thermodynamic properties for CO2 absorption were calculated from the experimental data. The regeneration of the DESs was performed at different temperatures, with the optimal regeneration temperature estimated to be 80 °C. The DESs exhibited good recyclability and moderate CO2/N2 selectivity.

scholarly journals Separation of Benzene-Cyclohexane Azeotropes Via Extractive Distillation Using Deep Eutectic Solvents as Entrainers

Processes ◽  
2021 ◽  
Vol 9 (2) ◽  
pp. 336
Author(s):  
Fang Bai ◽  
Chao Hua ◽  
Jing Li
Keyword(s):  
Atmospheric Pressure ◽  
Levulinic Acid ◽  
Petrochemical Industry ◽  
Choline Chloride ◽  
Tetrabutylammonium Bromide ◽  
Deep Eutectic Solvents ◽  
Extractive Distillation ◽  
Liquid Equilibrium ◽  
Ft Ir ◽  
Modelling Approach

The separation of benzene and cyclohexane azeotrope is one of the most challenging processes in the petrochemical industry. In this paper, deep eutectic solvents (DES) were used as solvents for the separation of benzene and cyclohexane. DES1 (1:2 mix of tetrabutylammonium bromide (TBAB) and levulinic acid (LA)), DES2 (1:2 mix of TBAB and ethylene glycol (EG)) and DES3 (1:2 mix of ChCl (choline chloride) and LA) were used as entrainers, and vapor-liquid equilibrium (VLE) measurements at atmospheric pressure revealed that a DES comprised of a 2:1 ratio of LA and TBAB could break this azeotrope with relative volatility (αij) up to 4.763. Correlation index suggested that the NRTL modelling approach fitted the experimental data very well. Mechanism of extractive distillation gained from FT-IR revealed that with hydrogen bonding and π–π bond interactions between levulinic acid and benzene could be responsible for the ability of this entrainer to break the azeotrope.

Selective recovery of zinc from zinc oxide dust using choline chloride based deep eutectic solvents

2019 ◽  
Vol 29 (10) ◽  
pp. 2222-2228 ◽  
Author(s):  
Xiao-lin ZHU ◽  
Cun-ying XU ◽  
Jie TANG ◽  
Yi-xin HUA ◽  
Qi-bo ZHANG ◽  
...  
Keyword(s):  
Zinc Oxide ◽  
Choline Chloride ◽  
Deep Eutectic Solvents ◽  
Selective Recovery

Self-assembled luminescent cholate gels induced by a europium ion in deep eutectic solvents

Soft Matter ◽  
2021 ◽  
Author(s):  
Meng Sun ◽  
Qintang Li ◽  
Xiao Chen
Keyword(s):  
Self Assembly ◽  
Choline Chloride ◽  
Deep Eutectic Solvents ◽  
Sodium Cholate ◽  
The Self ◽  
Europium Ion ◽  
Self Assembled

Luminescent gels have been successfully fabricated through the self-assembly of sodium cholate and a europium ion in choline chloride-based deep eutectic solvents.

Toxico-metabolomics study of a deep eutectic solvent comprising choline chloride and urea suggests in vivo toxicity involving oxidative stress and ammonia stress

2021 ◽  
Vol 23 (3) ◽  
pp. 1300-1311 ◽  
Author(s):  
Dasom Jung ◽  
Jae Back Jung ◽  
Seulgi Kang ◽  
Ke Li ◽  
Inseon Hwang ◽  
...  
Keyword(s):  
Oxidative Stress ◽  
Choline Chloride ◽  
Deep Eutectic Solvent ◽  
Deep Eutectic Solvents ◽  
In Vivo Toxicity ◽  
Metabolomics Study ◽  
Ammonia Stress

The in vitro and in vivo studies suggest that choline chloride-based deep eutectic solvents may not be considered as pure, safe mixtures even if they consist of safe compounds.

scholarly journals Deep Eutectic Solvents Based Choline Chloride for Enzymatic Biodiesel Production from Degumming Palm Oil

2020 ◽  
Vol 32 (4) ◽  
pp. 733-738 ◽  
Author(s):  
R. Manurung ◽  
Taslim ◽  
A.G.A. Siregar
Keyword(s):  
Palm Oil ◽  
Raw Materials ◽  
Choline Chloride ◽  
Deep Eutectic Solvent ◽  
Deep Eutectic Solvents ◽  
Biodiesel Production ◽  
Chloride Salt ◽  
Enzymatic Reactions ◽  
Potential Applications ◽  
Palm Oil Biodiesel

Deep eutectic solvents (DESs) have numerous potential applications as cosolvents. In this study, use of DES as organic solvents for enzymatic biodiesel production from degumming palm oil (DPO) was investigated. Deep eutectic solvent was synthesized using choline chloride salt (ChCl) compounds with glycerol and 1,2-propanediol. Deep eutectic solvent was characterized by viscosity, density, pH and freezing values, which were tested for effectiveness by enzymatic reactions for the production of palm biodiesel with raw materials DPO. Deep eutectic solvent of ChCl and glycerol produced the highest biodiesel yield (98.98%); weight of DES was only 0.5 % of that of the oil. In addition, the use of DES maintained the activity and stability of novozym enzymes, which was assessed as the yield until the 6th usage, which was 95.07 % biodiesel yield compared with the yield without using DES. Hence, using DES, glycerol in enzymatic biodiesel production had high potentiality as an organic solvent for palm oil biodiesel production

Absorptive Separation of HCl Gas by Choline Chloride-Based Deep Eutectic Solvents

2021 ◽  
pp. 116928
Author(s):  
Jie Zhu ◽  
Hui Shao ◽  
Lin Feng ◽  
Yingzhou Lu ◽  
Hong Meng ◽  
...  
Keyword(s):  
Choline Chloride ◽  
Deep Eutectic Solvents ◽  
Hcl Gas
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