Efficient diglycolamic acid extractant for separating and recycling Au(III)

2020 ◽  
Vol 150 ◽  
pp. 106254
Author(s):  
Zhigang Zhao ◽  
Peng Chen ◽  
Fan Yang ◽  
Qiuxia Liao ◽  
Yang Zhang ◽  
...  
Keyword(s):  
Acid Extractant

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).

New phosphonium ionic liquid with neodecanoate anion as butyric acid extractant

2021 ◽  
Author(s):  
Ján Marták ◽  
Tibor Liptaj ◽  
Milan Polakovič ◽  
Štefan Schlosser
Keyword(s):  
Ionic Liquid ◽  
Butyric Acid ◽  
Phosphonium Ionic Liquid ◽  
Acid Extractant

Problems Involved in the Quantitative Extraction of Glycogen and High-Energy Phosphorus Compounds in Frozen Cod Muscle

1968 ◽  
Vol 25 (8) ◽  
pp. 1525-1538 ◽  
Author(s):  
Sandra S. Nowlan ◽  
W. J. Dyer ◽  
Doris I. Fraser
Keyword(s):  
Liquid Nitrogen ◽  
Perchloric Acid ◽  
Potassium Hydroxide ◽  
Sampling Error ◽  
High Energy ◽  
Phosphorus Compounds ◽  
Quantitative Extraction ◽  
Sampling Procedures ◽  
Acid Extractant

Extraction of cod muscle with 0.3 N perchloric acid followed by digestion of the residue in potassium hydroxide yielded an average of 16% more total glycogen than did classical digestion with 30% KOH. However, the differences tended to be less at higher glycogen levels. It was suggested that glycogen may be partially degraded during digestion with KOH, although no glycogenosis occurred during contact with alkali prior to heating. The proportion of residual glycogen not extracted by acid varied from 23% in unfrozen muscle to about 40% in liquid nitrogen-frozen and in slowly frozen muscle.Significant degradation of glycogen and high energy phosphorus compounds in frozen prerigor cod muscle was avoided by weighing samples in insulated beakers chilled by liquid nitrogen to prevent warming or thawing, and by homogenizing immediately on addition of acid extractant. Extraction with acid enabled the simultaneous determination of glycogen and phosphorus compounds on the same sample. Special sampling procedures were employed to reduce the sampling error due to variation in glycogen distribution along the fillet.

Recovery of neodymium, dysprosium, and cobalt from NdFeB magnet leachate using an unsymmetrical dialkylphosphinic acid extractant, INET-3

2020 ◽  
Vol 38 (10) ◽  
pp. 1114-1118 ◽  
Author(s):  
Zhengyu Liu ◽  
Jiaming Wu ◽  
Xinyu Liu ◽  
Wen Wang ◽  
Ziwei Li ◽  
...  
Keyword(s):  
Ndfeb Magnet ◽  
Acid Extractant

scholarly journals Solvent Extraction of Lanthanide Ions with a Diglycolamic Acid Extractant Based on D-Glucosamine

2010 ◽  
Vol 17 (0) ◽  
pp. 129-138 ◽  
Author(s):  
Takahide NAKAMURA ◽  
Natsuki HIGA ◽  
Syouhei NISHIHAMA ◽  
Kazuharu YOSHIZUKA
Keyword(s):  
Solvent Extraction ◽  
Lanthanide Ions ◽  
Acid Extractant

Extraction of Sulfamethazine from Feed Samples

1988 ◽  
Vol 71 (2) ◽  
pp. 302-303 ◽  
Author(s):  
John W Blanchflower ◽  
Desmond A Rice
Keyword(s):  
Acetic Acid ◽  
Pelleted Feed ◽  
Extraction Solvents ◽  
Feed Samples ◽  
Acid Extractant

Abstract The efficiency of a number of published extraction solvents for sulfamethazine in feeds was evaluated. Poor recoveries were obtained with several of the solvents when sulfamethazine was extracted from commerically pelleted feed samples. Recoveries ranged from 48 to 94%. A 75% methanol acetic acid extractant gave the best results

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