scholarly journals High-Performance Recovery of Cobalt and Nickel from the Cathode Materials of NMC Type Li-Ion Battery by Complexation-Assisted Solvent Extraction

Minerals ◽  
2020 ◽  
Vol 10 (8) ◽  
pp. 662
Author(s):  
Wen-Yu Wang ◽  
Hong-Chi Yang ◽  
Ren-Bin Xu
Keyword(s):  
Solvent Extraction ◽  
Separation Factor ◽  
High Performance ◽  
Extraction Procedure ◽  
Volume Ratio ◽  
Lithium Ion ◽  
Avrami Equation ◽  
Optimal Separation ◽  
Conventional Solvent Extraction ◽  
Cobalt And Nickel

The annual global volume of waste lithium-ion batteries (LIBs) has been increasing over years. Although solvent extraction method seems well developed, the separation factor between cobalt and nickel is still relatively low—only 72 when applying conventional continuous-countercurrent extraction. In this study, we improved the separation factor of cobalt and nickel by complexation-assisted solvent extraction. Before solvent extraction procedure, leaching kinetic of Li, Ni, Co and Mn was studied and can be explained by the Avrami equation. Leached residues were also investigated by SEM and XRD. Operation parameters of complexation-assisted solvent extraction were examined, including volume ratio of extractant to diluent, types of diluent, type of complexing reagent, extractant saponification percentage and volume ratio of organic phase to aqueous phase. The optimal separation factor of complexation-assisted solvent extraction could be improved to 372, which is five times that of conventional solvent extraction. The separation tendency would be interpreted by the relationship between extraction equilibrium pH and log distribution coefficient.

scholarly journals Determination of residues of sulfonylurea herbicides in soil by using microwave-assisted extraction and high performance liquid chromatographic method

2017 ◽  
Vol 71 (4) ◽  
pp. 289-298
Author(s):  
Nada Grahovac ◽  
Zorica Stojanovic ◽  
Snezana Kravic ◽  
Dejan Orcic ◽  
Zvonimir Suturovic ◽  
...  
Keyword(s):  
High Performance ◽  
Extraction Procedure ◽  
Volume Ratio ◽  
Field Trials ◽  
Real Field ◽  
Ultraviolet Region ◽  
Sulfonylurea Herbicides ◽  
Microwave Assisted Extraction ◽  
Microwave Assisted ◽  
Assisted Extraction

A modified method for the analysis of nicosulfuron, rimsulfuron and prosulfuron was developed and validated by using microwave-assisted extraction (MAE) and ultra-performance liquid chromatography with diode array detection in the ultraviolet region (HPLC-UV-DAD). The most important experimental parameters of extraction procedure and HPLC-UV-DAD technique were optimised in respect to those sulfonylurea herbicides. High recoveries of the microwave-assisted extraction were obtained by using a dichloromethane?acetonitrile mixture (2:1 volume ratio) acidified with acetic acid (0.8 vol.%) with the addition of urea. The mean recoveries at three spiking levels ranged from 97.47 to 98.76% for nicosulfuron, 97.88 to 99.17% for rimsulfuron and from 97.91 to 99.83% for prosulfuron. The limits of detection of nicosulfuron, rimsulfuron and prosulfuron were 0.95, 0.91 and 0.89 ?g kg?1, respectively. The accuracy of the developed method was confirmed by HPLC coupled with tandem mass spectrometry parallel analyses. The developed method was used to investigate the dissipation dynamics of sulfonylurea herbicides in the real field trials in Vojvodina Province, Serbia. The obtained half-lives were 0.05, 0.23 and 0.15 days for recommended dose application of nicosulfuron, rimsulfuron and prosulfuron, respectively. Low residues and short half-life in soil suggested that the risk to sensitive rotational crops after application of those sulfonylurea herbicides is low when they are used in the appropriate dosages.

Semimetallic vanadium molybdenum sulfide for high-performance battery electrodes

2018 ◽  
Vol 6 (20) ◽  
pp. 9411-9419 ◽  
Author(s):  
Qingfeng Zhang ◽  
Longlu Wang ◽  
Jue Wang ◽  
Xinzhi Yu ◽  
Junmin Ge ◽  
...  
Keyword(s):  
Lithium Ion Batteries ◽  
Electrode Material ◽  
High Performance ◽  
High Surface ◽  
Volume Ratio ◽  
Lithium Ion ◽  
Diffusion Path ◽  
Molybdenum Sulfide ◽  
Two Dimensional

The ultrathin thickness and lateral morphology of a two dimensional (2D) MoS2 nanosheet contribute to its high surface-to-volume ratio and short diffusion path, rendering it a brilliant electrode material for lithium-ion batteries (LIBs).

Focused Microwave-Assisted Extraction Versus Conventional Solvent Extraction of Glycyrrhizic Acid from Licorice Root

2012 ◽  
Vol 550-553 ◽  
pp. 1659-1665
Author(s):  
Chen Sun ◽  
Guang Yu Liu ◽  
Pei Xia Zhao
Keyword(s):  
Solvent Extraction ◽  
High Performance ◽  
Glycyrrhizic Acid ◽  
Licorice Root ◽  
Scanning Electron Micrographs ◽  
Microwave Assisted Extraction ◽  
Acid Yield ◽  
Microwave Assisted ◽  
Assisted Extraction ◽  
Conventional Solvent Extraction

Conventional solvent extraction and microwave-assisted techniques were used to extract glycyrrhizic acid (GA) from licorice root, using different solvents including polar and non-polar solvents. For both extraction techniques, higher glycyrrhizic acid yields were consistently obtained with water than with other solvents from the same samples. Solubility of glycyrrhizic acid or salts in water is the major cause of this observation. For microwave assisted extraction (MAE) with water, glycyrrhizic acid yield increased to 3.10% in 7min. Similar observations were made with conventional solvent extraction, glycyrrhizic acid yield was raised to 3.12% in 90min. The extracts were analyzed by high-performance liquid chromatography equipped with an ultraviolet detector. The kinetic studies were supplemented by scanning electron micrographs (SEM), and a mechanism based on the mass transfer between the solvents and matrix had been proposed to account for the acceleration extraction made with MAE.

Study of an Accelerated Solvent Extraction Procedure for the Determination of Acaricide Residues in Honey by High-Performance Liquid Chromatography–Diode Array Detector

2002 ◽  
Vol 65 (1) ◽  
pp. 161-166 ◽  
Author(s):  
E. KORTA ◽  
A. BAKKALI ◽  
L. A. BERRUETA ◽  
B. GALLO ◽  
F. VICENTE
Keyword(s):  
High Performance Liquid Chromatography ◽  
Liquid Chromatography ◽  
Solvent Extraction ◽  
High Performance ◽  
Extraction Procedure ◽  
Reversed Phase ◽  
Accelerated Solvent Extraction ◽  
Array Detector ◽  
Static Extraction

An accelerated solvent extraction (ASE) procedure has been optimized for the determination of synthetic acaricides (amitraz, bromopropylate, cymiazole, coumaphos, τ-fluvalinate, and flumethrin) and their residues in honey by reversed-phase high-performance liquid chromatography. The effects of experimental variables such as solvent composition, temperature, static extraction time, and solvent flush volume on the ASE efficiency have been studied. The acaricides were extracted by hexane–propanol (1/3, vol/vol) at 95°C and 2,000 psi for 8 min. Recovery values of between 53 and 108% were achieved with the different substances, with coefficients of variation between 2 and 13% and limits of detection from 0.01 to 0.2 μg/g.

scholarly journals Solvent Extraction of Co, Ni and Mn from NCM Sulfate Leaching Solution of Li(NCM)O2 Secondary Battery Scraps

2017 ◽  
Vol 62 (2) ◽  
pp. 1011-1014
Author(s):  
Hyun Seon Hong ◽  
Dae Weon Kim ◽  
Hee Lack Choi ◽  
Sung-Soo Ryu
Keyword(s):  
Solvent Extraction ◽  
Lithium Ion Battery ◽  
Potassium Permanganate ◽  
Chlorine Dioxide ◽  
Separation Factor ◽  
Lithium Ion ◽  
Extraction Rate ◽  
Secondary Battery ◽  
Leaching Solution ◽  
Sulfate Leaching

AbstractAs a part of the study on recycling Li(NCM)O2lithium-ion battery scraps, solvent extraction experiments were performed using different extraction agents such as PC88A, Cyanex272 and D2EHPA to separate Co, Ni and Mn from the leaching solution. When the ratio of Mn to Ni was about 0.4 in the leaching solution, the separation factor for Co and Mn was found to be less than 10 so that the separation of Co and Ni was insufficient. When solvent extraction was done using the solution with the lower Mn/Ni ratio of 0.05 where Mn was removed by potassium permanganate and chlorine dioxide, more than 99% of Mn could be extracted through five courses of extraction using 30vol% D2EHPA while the extraction rates of Co and Ni were around 17% and 11%, respectively. In the case that Mn was removed from the solution, the extraction rate of Co was higher than 99% whereas less than 7% Ni was extracted using Cyanex272 suggesting that Co and Ni elements were effectively separated.

High-performance SiO/C/G Composite Anode for Lithium Ion Batteries

2013 ◽  
Vol 28 (9) ◽  
pp. 943-948 ◽  
Author(s):  
Chang-Chuan SHI ◽  
Xue-Lin YANG ◽  
Lu-Lu ZHANG ◽  
Yong-Tao ZHOU ◽  
Zhao-Yin WEN
Keyword(s):  
Lithium Ion Batteries ◽  
High Performance ◽  
Lithium Ion ◽  
Composite Anode

Examination of Conditions for the Determination of Carbamate Pesticides in Soils

1992 ◽  
Vol 57 (8) ◽  
pp. 1632-1638 ◽  
Author(s):  
Věra Tatarkovičová ◽  
Zdeněk Stránský
Keyword(s):  
Activated Carbon ◽  
Solvent Extraction ◽  
Soil Type ◽  
Extraction Procedure ◽  
Purification Procedure ◽  
Factors Affecting ◽  
Carbamate Pesticides ◽  
Rp Hplc ◽  
Extracting Solvent

The procedure for the determination of carbamate pesticides in soil was optimized. The following factors affecting the final results were investigated: extracting solvent, extraction procedure, extract purification procedure, and soil type. Triple extraction with acetone and purification of the extract on a two-stage purification column containing an activated carbon-silica gel 1+1 mixture were found optimal. The extracts after treatment were analyzed by RP-HPLC with UV detection. The method developed allows carbamate pesticides in soil to be determined at concentrations in excess of 30 μg kg-1.

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