Solvent extraction and separation of rare earths from chloride media using α-aminophosphonic acid extractant HEHAMP

2018 ◽  
Vol 36 (2) ◽  
pp. 136-149 ◽  
Author(s):  
Qi Zhao ◽  
Zhifeng Zhang ◽  
Yanling Li ◽  
Xue bian ◽  
Wuping Liao
Keyword(s):  
Solvent Extraction ◽  
Rare Earths ◽  
Aminophosphonic Acid ◽  
Extraction And Separation ◽  
Acid Extractant

Solvent extraction and separation of rare-earths from phosphoric acid solutions with TOPS 99

2011 ◽  
Vol 110 (1-4) ◽  
pp. 50-55 ◽  
Author(s):  
S. Radhika ◽  
B. Nagaphani Kumar ◽  
M. Lakshmi Kantam ◽  
B. Ramachandra Reddy
Keyword(s):  
Solvent Extraction ◽  
Phosphoric Acid ◽  
Rare Earths ◽  
Acid Solutions ◽  
Extraction And Separation

Extraction and separation of heavy rare earths from chloride medium by α-aminophosphonic acid HEHAPP

2018 ◽  
Vol 36 (3) ◽  
pp. 304-310 ◽  
Author(s):  
Shengting Kuang ◽  
Zhifeng Zhang ◽  
Yanling Li ◽  
Haiqin Wei ◽  
Wuping Liao
Keyword(s):  
Rare Earths ◽  
Aminophosphonic Acid ◽  
Chloride Medium ◽  
Extraction And Separation

Solvent extraction and separation of light rare earths from chloride media using HDEHP-P350 system

2021 ◽  
Author(s):  
Wenjie Zhang ◽  
Dongxia Feng ◽  
Xian Xie ◽  
Xiong Tong ◽  
Yunpeng DU ◽  
...  
Keyword(s):  
Solvent Extraction ◽  
Rare Earths ◽  
Extraction And Separation

Extraction of tetra- and hexavalent actinide ions from nitric acid solutions using some diglycolamide functionalized calix[4]arenes

2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Rajesh B. Gujar ◽  
Parveen K. Verma ◽  
Prasanta K. Mohapatra ◽  
Mudassir Iqbal ◽  
Jurriaan Huskens ◽  
...  
Keyword(s):  
Nitric Acid ◽  
Solvent Extraction ◽  
Extraction Efficiency ◽  
Minor Actinide ◽  
Acid Solutions ◽  
Extraction Mechanism ◽  
Nitrate Ion ◽  
Nitric Acid Solutions ◽  
Actinide Ions ◽  
Acid Extractant

Abstract Neptunium is one of the most important minor actinide elements with some of its isotopes having very long half-lives, therefore necessitating its separation from acidic radioactive wastes. Solvent extraction of Np4+ and NpO2 2+ was studied using three multiple diglycolamide (DGA) extractants with n-propyl, n-octyl and 3-pentyl substituents termed as L I , L II and L III , respectively, in a mixed diluent of 5% isodecanol and 95% n-dodecane. For comparison purpose, the extraction of Pu4+ and UO2 2+ was carried out under identical conditions. The extraction efficiency of the ligands for the tetravalent ions followed the trend: L II  > L I  > L III , which changed to L III  > L II  > L I for the hexavalent ions. While the extraction of the tetravalent ions was reasonably good (ca. 90–98%) with an extremely low (5.0 × 10−5 M) ligand concentration, poor extraction (ca. 5–16%) of the hexavalent ions was seen even with a 20 times higher concentration of the ligand. In general, Pu4+ was better extracted than Np4+, while NpO2 2+ was marginally better extracted then UO2 2+. A ‘solvation’ type extraction mechanism was proposed based on the extraction profiles obtained as a function of the concentrations of the feed nitric acid, extractant as well as nitrate ion. The extracted species were found out to be M(NO3)4·mL and MO2(NO3)2·nL (M = Np or Pu, 1 < m < 2, n ≃ 1).

Enhanced extraction and separation of zirconium(IV) and hafnium(IV) with 3-phenyl-4-benzoyl-5-isoxazolone in presence of various neutral organophosphorus extractants

2007 ◽  
Vol 95 (5) ◽  
Author(s):  
K. Janardhan Reddy ◽  
A. Varada Reddy ◽  
B. S. Shaibu ◽  
M. L. P. Reddy
Keyword(s):  
Solvent Extraction ◽  
Hydrochloric Acid ◽  
Acid Solutions ◽  
Extraction And Separation ◽  
Extraction Behavior ◽  
Hydrochloric Acid Solutions ◽  
Organophosphorus Extractants

Various 3-phenyl-4-aroyl-5-isoxazolones, namely, 3-phenyl-4-benzoyl-5-isoxazolone (HPBI), 3-phenyl-4-(4-fluorobenzoyl)-5-isoxazolone (HFBPI) and 3-phenyl-4-(4-toluoyl)-5-isoxazolone (HTPI) were synthesized and examined with regard to the solvent extraction behavior of Zr(IV) and Hf(IV) from hydrochloric acid solutions. The results demonstrated that Zr(IV) and Hf(IV) extracted into chloroform with 3-phenyl-4-aroyl-5-isoxazolones (HA), as ZrOA

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