Transport of uranium from nitric acid solution by non-dispersive solvent extraction using a hollow fibre contactor

2006 ◽  
Vol 94 (6-7) ◽  
Author(s):  
C. B. Patil ◽  
P. K. Mohapatra ◽  
R. R. Singh ◽  
P. B. Gurba ◽  
P. Janardan ◽  
...  
Keyword(s):  
Nitric Acid ◽  
Solvent Extraction ◽  
Acid Solution ◽  
Organic Solvent ◽  
Acid Medium ◽  
Nitric Acid Solution ◽  
Hollow Fibre ◽  
Nitric Acid Medium ◽  
Aqueous Nitric Acid

SummaryMembrane based non-dispersive solvent extraction (NDSX) of U(VI) from aqueous nitric acid medium was carried out using a commercial hollow fibre module containing microporous hydrophobic polypropylene capillaries. The NDSX operation was carried out by pumping U(VI) solutions at varying concentrations of nitric acid (1-5 M) through the tube side and organic solvent (di-

Syntheses and evaluation of new hydrophilic azacryptands used as masking agents of technetium in solvent extraction processes

2021 ◽  
Vol 50 (5) ◽  
pp. 1620-1630
Author(s):  
Alexiane Thevenet ◽  
Ana Miljkovic ◽  
Sonia La Cognata ◽  
Cécile Marie ◽  
Christelle Tamain ◽  
...  
Keyword(s):  
Nitric Acid ◽  
Solvent Extraction ◽  
Acid Medium ◽  
Separation Process ◽  
Nitric Acid Medium ◽  
Masking Agents ◽  
Extraction Processes

New azacryptands with the addition of hydrophilic groups were synthesized to bind selectively the pertechnetate anion in nitric acid medium, and avoid its extraction in the separation process.

Synergistic extraction of uranium(VI) by 2-hydroxy-1-naphthaldehyde thiosemicarbazone and several neutral donors

2003 ◽  
Vol 91 (10) ◽  
Author(s):  
S. Banerjee ◽  
M. Bhar ◽  
S. Basu
Keyword(s):  
Nitric Acid ◽  
Ethyl Acetate ◽  
Acid Medium ◽  
Phosphine Oxide ◽  
Extraction Constant ◽  
Dimethyl Sulphoxide ◽  
Nitric Acid Medium ◽  
Extraction Behaviour ◽  
Trioctyl Phosphine Oxide ◽  
Aqueous Nitric Acid

SummaryThe extraction behaviour of U (VI) from an aqueous nitric acid medium employing a 2-hydroxy-1-naphthaldehyde thiosemicarbazone in ethyl acetate has been studied in presence of different neutral donors like trioctyl phosphine oxide (TOPO), dimethyl sulphoxide (DMSO) and trioctyl amine (TOA). The extraction constant (log

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