Development of a new solvent extraction process based on butyl-1-[N,N-bis(2-ethylhexyl)carbamoyl]nonyl phosphonic acid for the selective recovery of uranium(VI) from phosphoric acid

2016 ◽  
Vol 34 (3) ◽  
pp. 274-289 ◽  
Author(s):  
M. Miguirditchian ◽  
G. Bernier ◽  
V. Pacary ◽  
C. Balaguer ◽  
C. Sorel ◽  
...  
Keyword(s):  
Solvent Extraction ◽  
Phosphoric Acid ◽  
Phosphonic Acid ◽  
Extraction Process ◽  
Selective Recovery

scholarly journals Modelling and Optimizing the Solvent Extraction of Cadmium from Phosphoric Acid using Experimental Design

2021 ◽  
Vol 33 (3) ◽  
pp. 637-643
Author(s):  
K. Berkalou ◽  
A. Nounah ◽  
H. Chaair ◽  
M. Khamar ◽  
R. Boussen ◽  
...  
Keyword(s):  
Solvent Extraction ◽  
Experimental Design ◽  
Phosphoric Acid ◽  
Graphical Representation ◽  
Extraction Process ◽  
Optimal Conditions ◽  
Anova Analysis ◽  
Stirring Rate ◽  
Stirring Time ◽  
Variable Space

The removal of cadmium from phosphoric acid was carried out using the solvent extraction process, taking into account factors such as pH, concentration of the extracting agent [EA], organic phase/aqueous phase (O/A) ratio, stirring time and stirring rate. In order to study the effect of these involved factors and their interactions on the extraction percentage of cadmium, a composite central design (CCD) of 24 experiments was adopted. An empirical model was developed and validated by applying ANOVA analysis. The graphical representation of this model in the variable space allowed to determine the optimal conditions of these factors. The extraction of cadmium from phosphoric acid reached a percentage of the order of 98%, under the following conditions: pH = 3, [EA] = 10-2 M, O/A = 1.1, stirring time 90 min, stirring rate 800 rpm.

scholarly journals Study on the Effect and Mechanism of Impurity Aluminum on the Solvent Extraction of Rare Earth Elements (Nd, Pr, La) by P204-P350 in Chloride Solution

Minerals ◽  
2021 ◽  
Vol 11 (1) ◽  
pp. 61
Author(s):  
Wenjie Zhang ◽  
Xian Xie ◽  
Xiong Tong ◽  
Yunpeng Du ◽  
Qiang Song ◽  
...  
Keyword(s):  
Rare Earth ◽  
Solvent Extraction ◽  
Rare Earth Elements ◽  
Organic Phase ◽  
Extraction Process ◽  
Industrial Applications ◽  
Separation And Purification ◽  
Aluminum Ion ◽  
Hydrochloric Acid Medium ◽  
Impurity Ion

Solvent extraction is the most widely used method for separation and purification of rare earth elements, and organic extractants such as di(2-ethylhexyl) phosphoric acid (P204) and di(1-methyl-heptyl) methyl phosphonate (P350) are most commonly used for industrial applications. However, the presence of impurity ions in the feed liquid during extraction can easily emulsify the extractant and affect the quality of rare earth products. Aluminum ion is the most common impurity ion in the feed liquid, and it is an important cause of emulsification of the extractant. In this study, the influence of aluminum ion was investigated on the extraction of light rare earth elements by the P204-P350 system in hydrochloric acid medium. The results show that Al3+ competes with light rare earths in the extraction process, reducing the overall extraction rate. In addition, the Al3+ stripping rate is low and there is continuous accumulation of Al3+ in the organic phase during the stripping process, affecting the extraction efficiency and even causing emulsification. The slope method and infrared detection were utilized to explore the formation of an extraction compound of Al3+ and the extractant P204-P350 that entered the organic phase as AlCl[(HA)2]2P350(o).

scholarly journals Separation of Sn, Sb, Bi, and Cu from Tin Anode Slime by Solvent Extraction and Chemical Precipitation

Metals ◽  
2021 ◽  
Vol 11 (3) ◽  
pp. 515
Author(s):  
Wei-Sheng Chen ◽  
Shota Mesaki ◽  
Cheng-Han Lee
Keyword(s):  
Solvent Extraction ◽  
Liquid Phase ◽  
Ph Value ◽  
Chemical Precipitation ◽  
Extraction Process ◽  
Refining Process ◽  
Anode Slime ◽  
Electrolytic Refining ◽  
Precipitation Procedure ◽  
Tin Anode

Tin anode slime is a by-product of the tin electrolytic refining process. This study investigated a route to separate Sn, Sb, Bi, and Cu from tin anode slime after leaching with hydrochloric acid. In the solvent extraction process with tributyl phosphate, Sb and Sn were extracted into the organic phase. Bi and Cu were unextracted and remained in the liquid phase. In the stripping experiment, Sb and Sn were stripped and separated with HCl and HNO3. Bi and Cu in the aqueous phase were also separated with chemical precipitation procedure by controlling pH value. The purities of Sn, Sb, Cu solution and the Bi-containing solid were 96.25%, 83.65%, 97.51%, and 92.1%. The recovery rates of Sn, Sb, Cu, and Bi were 76.2%, 67.1%, and 96.2% and 92.4%.

Facile fractionation of bamboo hydrolysate and characterization of isolated lignin and lignin-carbohydrate complexes

Holzforschung ◽  
2020 ◽  
Vol 0 (0) ◽  
Author(s):  
Xiaodi Wang ◽  
Yongchao Zhang ◽  
Luyao Wang ◽  
Xiaoju Wang ◽  
Qingxi Hou ◽  
...  
Keyword(s):  
Solvent Extraction ◽  
Organic Solvent ◽  
Extraction Process ◽  
Water Soluble ◽  
Organic Solvent Extraction ◽  
Glycoside Linkage ◽  
Potential Applications ◽  
Tremendous Amount ◽  
Main Components ◽  
Hemicellulosic Sugars

AbstractAn efficient separation technology for hydrolysates towards a full valorization of bamboo is still a tough challenge, especially regarding the lignin and lignin-carbohydrate complexes (LCCs). The present study aimed to develop a facile approach using organic solvent extraction for efficiently fractionating the main components of bamboo hydrolysates. The high-purity lignin with only a trace of carbohydrates was first obtained by precipitation of the bamboo hydrolysate. The water-soluble lignin (WSL) fraction was extracted in organic solvent through a three-stage organic solvent extraction process, and the hemicellulosic sugars with increased purity were also collected. Furthermore, a thorough characterization including various NMR techniques (31P, 13C, and 2D-HSQC), GPC, and GC-MS was conducted to the obtained lignin-rich-fractions. It was found that the WSL fraction contained abundant functional groups and tremendous amount of LCC structures. As compared to native LCC of bamboo, the WSL fraction exhibited more typical LCC linkages, i.e. phenyl glycoside linkage, which is the main type of chemical linkage between lignin and carbohydrate in both LCC samples. The results demonstrate that organic phase extraction is a highly efficient protocol for the fractionation of hydrolysate and the isolation of LCC-rich streams possessing great potential applications.

Modelling tyramine extraction from wastewater using a non-dispersive solvent extraction process

2020 ◽  
Vol 27 (31) ◽  
pp. 39068-39076 ◽  
Author(s):  
Mahdi Ghadiri ◽  
Alireza Hemmati ◽  
Ali Taghvaie Nakhjiri ◽  
Saeed Shirazian
Keyword(s):  
Solvent Extraction ◽  
Extraction Process
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