Study on the extraction mechanisms of uranyl nitrate and thorium nitrate by DMHMP
Creators
- 1. Academia Sinica, Shanghai, SH (China). Shanghai Inst. of Nuclear Research
Description
The extraction mechanisms of uranyl nitrate and thorium nitrate by DMHMP are studied. The compositions of the extraction complexes are UO2(NO3)2.2DMHMP and Th(NO3)4.3DMHMP. At a constant ionic strength μ = 2, the equilibrium constants for their formation are lg Ksub(U) = 4.6, lg Ksub(Th) = 4.3 respectively. The measured values of the distribution ratio of extraction agree quite well with those obtained by Leden's method. Successive stability constants of the nitrate complexes of thorium by extraction with DMHMP are calculated by Lenden's graphical method and via a least equares technique using a PDP11/70 computer. Both results agree well. The successive stability constants of the complexes formed are: β1 = 8.0, β2 = 5.2, β3 = 0.8, β4 = 1.3. By comparison of equilibrium constants complex formation of DMHMP and TBP with U and Th, it can be expected, that DMHMP is superion to TBP for the extraction separation of uranium and thorium
Additional details
Publishing Information
- Journal Title
- J. Nucl. Radiochem.
- Journal Volume
- 7
- Journal Issue
- 3
- Series
- J. Nucl. Radiochem.
- Journal Page Range
- 147-154
- ISSN
- 0253-9950
- CODEN
- HHHHD
INIS
- Country of Publication
- China
- Country of Input or Organization
- China
- INIS RN
- 17061544
- Subject category
- S38: RADIATION CHEMISTRY, RADIOCHEMISTRY AND NUCLEAR CHEMISTRY;
- Descriptors DEI
- CHEMICAL COMPOSITION; EQUILIBRIUM; NITRIC ACID; NUMERICAL SOLUTION; PERCHLORIC ACID; PHOSPHONIC ACID ESTERS; SOLVENT EXTRACTION; STABILITY; THORIUM COMPLEXES; THORIUM NITRATES; URANYL COMPLEXES; URANYL NITRATES
- Descriptors DEC
- ACTINIDE COMPLEXES; ACTINIDE COMPOUNDS; CHLORINE COMPOUNDS; COMPLEXES; ESTERS; HALOGEN COMPOUNDS; HYDROGEN COMPOUNDS; INORGANIC ACIDS; INORGANIC COMPOUNDS; NITRATES; NITROGEN COMPOUNDS; ORGANIC COMPOUNDS; ORGANIC PHOSPHORUS COMPOUNDS; OXYGEN COMPOUNDS; SEPARATION PROCESSES; THORIUM COMPOUNDS; URANIUM COMPLEXES; URANIUM COMPOUNDS; URANYL COMPOUNDS