Published 2001 | Version v1
Book Metadata-only

Effect of DBPA on zirconium extraction by 30% TBP in the presence of uranium

Creators

  • 1. NPO Radievyj Inst. im. V.G. Khlopina, Sankt-Peterburg (Russian Federation)

Description

Investigation of dibutylphosphoric acid (DBP) effect on zirconium extraction in 30 % TBP in the presence of uranyl nitrate and in absence of it shows that DBP increases Zr distribution coefficient (DZr) significantly with DBP concentration growth from 0 to 2 g/l. With U concentration increase decrease of DZr is observed. For estimation of the mutual effect of U and DBP function of increasing FZr is introduced. At first with U concentration increase FZr decreases.Then FZr increases, especially in the case of stoichiometric Zr excess over DBP. In the case of DBP excess over Zr decrease of FZr is observed at low U concentration. Apparently, Zr extraction mechanisms in 30 % TBP with DBP participation in the case of its excess over Zr and in the case of its deficiency (or concentration equality) are distinguished by DBP molecule number in solvate composition

Abstract (Russian)

Исследование влияния дибутилфосфорной кислоты (ДБФ) на экстракцию циркония в 30 % ТБФ в присутствии уранилнитрата и без него показало, что ДБФ значительно увеличивает коэффициент распределения Zr (DZr) с ростом концентрации ДБФ от 0 до 2 г/л. С повышением концентрации U наблюдается падение DZr, однако отношение DZr в присутствии ДБФ и в ее отсутствии достаточно велико. Для оценки эффекта одновременного действия U и ДБФ вводится функция усиления FZr. С ростом концентрации U FZr вначале уменьшается, а затем возрастает, особенно при стехиометрическом избытке Zr над ДБФ. При избытке ДБФ над Zr отмечается снижение FZr при низкой концентрации U. Очевидно, механизмы экстракции Zr в 30 % ТБФ с участием ДБФ при ее избытке над Zr и при ее недостатке (или равенстве концентраций) отличаются по числу молекул ДБФ в составе сольвата
Part of:
Chemistry and technology of extraction (collection of scientific reports of the Mendeleev Russian Chemical and Technology University). Volume 1

Additional details

Additional titles

Original title (Russian)
Влияние DBFK на экстракцию циркония 30% TBF в присуцтвии урана

Publishing Information

Publisher
RKhTU im. D.I. Mendeleeva
Imprint Place
Moscow (Russian Federation)
ISBN
5-7237-0307-2
Imprint Title
Chemistry and technology of extraction (collection of scientific reports of the Mendeleev Russian Chemical and Technology University). Volume 1
Imprint Pagination
366 p.
Journal Page Range
p. 230-234

Conference

Title
12. Russian conference on extraction. - 5. School-seminar on extraction. Nontraditional extraction systems
Original Conference Title
12. Rossijskaya konferentsiya po ehkstraktsii. - 5. Shkola-seminar po ehkstraktsii. Netraditsionnye ehkstraktsionnye sistemy
Dates
7-13 Oct 2001
Place
Moscow (Russian Federation)

INIS

Country of Publication
Russian Federation
Country of Input or Organization
Russian Federation
INIS RN
34008941
Subject category
S37: INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY; S38: RADIATION CHEMISTRY, RADIOCHEMISTRY AND NUCLEAR CHEMISTRY;
Resource subtype / Literary indicator
Conference
Descriptors DEI
CHEMICAL REACTION KINETICS; CONCENTRATION RATIO; DBP; DISTRIBUTION FUNCTIONS; SOLVENT EXTRACTION; TBP; URANYL NITRATES; ZIRCONIUM COMPLEXES
Descriptors DEC
ACTINIDE COMPOUNDS; BUTYL PHOSPHATES; COMPLEXES; ESTERS; EXTRACTION; FUNCTIONS; KINETICS; NITRATES; NITROGEN COMPOUNDS; ORGANIC COMPOUNDS; ORGANIC PHOSPHORUS COMPOUNDS; OXYGEN COMPOUNDS; PHOSPHORIC ACID ESTERS; REACTION KINETICS; SEPARATION PROCESSES; TRANSITION ELEMENT COMPLEXES; URANIUM COMPOUNDS; URANYL COMPOUNDS

Optional Information

Notes
8 refs.; 3 figs. Imprint:Khimiya i tekhnologiya ehkstraktsii (sbornik nauchnykh trudov Rossijskogo Khimiko-Tekhnologicheskogo Universiteta im. D.I. Mendelleva). Tom 1