A5044145735- Radioactive element chemistry and processing
- Extraction and Separation Processes
- Chemical Synthesis and Characterization
- Crystallization and Solubility Studies
- X-ray Diffraction in Crystallography
- Analytical chemistry methods development
- Lanthanide and Transition Metal Complexes
- Metal Extraction and Bioleaching
- Nuclear materials and radiation effects
- Bauxite Residue and Utilization
- Inorganic and Organometallic Chemistry
- Analytical Chemistry and Chromatography
- Neutrino Physics Research
- Mining Techniques and Economics
- Nuclear Materials and Properties
- Recycling and utilization of industrial and municipal waste in materials production
- Field-Flow Fractionation Techniques
- Industrial Engineering and Technologies
- Chemical Thermodynamics and Molecular Structure
- Molten salt chemistry and electrochemical processes
- Particle Detector Development and Performance
- Dark Matter and Cosmic Phenomena
- Atomic and Subatomic Physics Research
- Boron Compounds in Chemistry
- Mining and Gasification Technologies
Frumkin Institute of Physical Chemistry and Electrochemistry
2007-2024
D. Mendeleyev University of Chemical Technology of Russia
2023
A. N. Nesmeyanov Institute of Organoelement Compounds
2023
Russian Academy of Sciences
2005-2010
The extraction of lithium from aqueous solutions LiNTf2 and LiCl salts using benzo-15-crown-5 ether (B15C5) as an extractant in [C8mim][NTf2] ionic liquid was studied. transition the into phase distribution Cl- ions during were determined. complexes with B15C5 different LiNTf2:B15C5 ratios isolated for first time characterized via X-ray diffraction IR spectroscopy. Differences process determined infrared spectroscopic study systems.
A systematic study of extraction systems for the separation
Abstract A novel bis(methylimidazolium) ionic liquid 3,3′-(pentane-1,5-diyl) bis(1-methylimidazolium) bis(trifluoromethanesulfonul)imide [C 5 (mim) 2 ][Tf N] has been synthesized. Its effect on the extraction of U(VI), Th(IV), Am(III), and lanthanides(III) from nitric acid solutions with a polydentate neutral bis(carbamoylmethylphosphine oxide) ligand L containing two bidentate fragments Ph P(O)CH C(O)NH–, interconnected by 4,7,10-trioxatridecane spacer through amide nitrogen atoms...
The concept of a new method, the CARBEX (CARBonate EXtraction) process, was proposed for reprocessing spent uranium oxide fuel. process is based on use water solutions Na2CO3 or (NH4)2CO3 and solvent extraction (SE) by quaternary ammonium compounds selective recovery purification U from fission products (FPs). Applying SE allows to reach high degree FPs. Carrying out processes in poorly aggressive alkaline carbonate media leads increasing safety SNF's better selectivity separation...
This article provides a survey of wet (aqueous) methods for recovery, separation, and purification uranium from fission products in carbonate solutions during the reprocessing spent nuclear fuel removal radionuclides alkaline radioactive waste. The main such as selective direct precipitation, ion exchange, solvent extraction are considered. These were compared evaluated media according to novel alternative non-acidic treatment processes
The article presents data on the solvent extraction separation of rare-earth elements (REEs), such as La(III), Ce(III), Pr(III), and Nd(III), using synergic mixtures methyltrioctylammonium nitrate (TOMANO3) with tri-n-butyl phosphate (TBP) from weakly acidic solutions. Specifically, experimental results REEs, for pair Ce(III)/Pr(III) quaternary REEs (La(III), Nd(III)) La(III)/Pr(III) solutions containing are presented. It was shown that effective a solution 219 g Ce(III)/L, 106 La(III)/L, 20...
The first comprehensive structural and extraction study of a 2,2'-bipyridine-6,6'-dicarboxamide (L diamide) extractant for U, Np, Pu, Th, Am, Eu ions showed great potential actinide separation due to steric hindrance the amidic side phenyl ring given compound. complexes An(VI) Th(IV) with 2,2'-bipyridyldicarboxamide-type extractants demonstrated structure species time. Investigation properties radiometric millimolar quantities actinides similar trends. For time, metal-ion-induced phenyl-ring...
Liquid–liquid extraction of carbonate and mixed peroxo-carbonate compounds U(VI) Am(III) from Na2CO3 aqueous solutions by methyltrioctylammonium in toluene has been studied. The main patterns effect extractant, Na2CO3, H2O2 concentration on distribution separation have established. Using slope analysis UV–vis spectroscopy, the compositions extractable are established as (R4N)4[UO2(CO3)3], (R4N)4[UO2(О2)(CO3)2], (R4N)6[(UO2)2(O2)(CO3)4] for U(VI); R4N[Am(CO3)2] (R4N)3[Am(CO3)3] Am(III), where...
Abstract The explosive development of renewable energy in recent years is reshaping the geopolitical picture world. Solar panels and wind turbines have become symbol new transition, while lithium-ion batteries its basis driver development. It was that made it possible to overcome main problem – inconstancy uncontrollability. article highlights lithium problem, reasons for volatility prices, sources difficulties production. In addition, prospects industry Russia current domestic developments...