Published 2002 | Version v1
Journal article Metadata-only

Extraction of rare earths and americium from nitric acid solutions by polyphosphine oxides

Creators

  • 1. Inst. Fiziki Tverdogo Tela RAN, Chernogolovka (Russian Federation)
  • 2. Inst. Problem Tekhnologii Mikroehlektroniki i Osobo Chistykh Materialov RAN, Chernogolovka (Russian Federation)
  • 3. Inst. Fiziologicheski Aktivnykh Veshchestv RAN, Chernogolovka (Russian Federation)

Description

Extraction of HNO3 and microamounts of Y, La-Nd, Sm-Lu and Am from solutions of NH4NO3 and HNO3 by polyphosphine oxide solutions containing o-oxyphenylenemethylene fragments in dichloroethane was studied. Stoichiometry of the complexes extracted was determined and effective extraction constants were calculated. It was shown that increase in the number of phosphoryl groups in extractant molecule brings about increase in extraction of light-weight rare earths and decrease in the extraction of heavy-weight ones

Abstract (Russian)

Изучена экстракция HNO3 и микроколичеств Y, La-Nd, Sm-Lu и Am из растворов NH4NO3 и HNO3 растворами полифосфиноксидов, содержащих о-оксифенилен-метиленовые фрагменты, в дихлорэтане. Определена стехиометрия экстрагируемых комплексов и рассчитаны эффективные константы экстракции. Показано, что увеличение числа фосфорильных групп в молекуле экстрагента приводит к увеличению экстракции легких редкоземельных элементов и уменьшению экстракции тяжелых

Additional details

Additional titles

Original title (Russian)
Экстракция редкоземельных элементов и америция из азотнокислых растворов полифосфиноксидами

Publishing Information

Journal Title
Radiokhimiya
Journal Volume
44
Journal Issue
1
Journal Page Range
p. 26-33
ISSN
0033-8311
CODEN
RADKAU

INIS

Country of Publication
Russian Federation
Country of Input or Organization
Russian Federation
INIS RN
34046153
Subject category
S38: RADIATION CHEMISTRY, RADIOCHEMISTRY AND NUCLEAR CHEMISTRY; S37: INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY;
Descriptors DEI
AMERICIUM COMPLEXES; AMMONIUM NITRATES; CHLORINATED ALIPHATIC HYDROCARBONS; CONCENTRATION RATIO; COORDINATION VALENCES; DISTRIBUTION FUNCTIONS; MOLECULAR STRUCTURE; NITRIC ACID; PHOSPHINE OXIDES; RARE EARTH COMPLEXES; SOLUTIONS; SOLVENT EXTRACTION; TRACE AMOUNTS; YTTRIUM COMPLEXES
Descriptors DEC
ACTINIDE COMPLEXES; AMMONIUM COMPOUNDS; COMPLEXES; DISPERSIONS; EXTRACTION; FUNCTIONS; HALOGENATED ALIPHATIC HYDROCARBONS; HOMOGENEOUS MIXTURES; HYDROGEN COMPOUNDS; INORGANIC ACIDS; INORGANIC COMPOUNDS; MIXTURES; NITRATES; NITROGEN COMPOUNDS; ORGANIC CHLORINE COMPOUNDS; ORGANIC COMPOUNDS; ORGANIC HALOGEN COMPOUNDS; OXYGEN COMPOUNDS; PHOSPHINES; PHOSPHORUS COMPOUNDS; SEPARATION PROCESSES; TRANSITION ELEMENT COMPLEXES; TRANSURANIUM COMPLEXES; VALENCE

Optional Information

Notes
24 refs.; 3 tabs.; 9 figs.