Published 2000 | Version v1
Journal article Metadata-only

The interaction of lanthanum, neodymium and europium nitrates with crown ether: decyl-, dicyclohexano- and dibenzo-18-crown-6

Creators

  • 1. Bashkirskij Gosuniversitet, Ufimskij Gosudarstvennyj Neftyanoj Tekhnicheskij Univ., Ufa (Russian Federation)

Description

Extraction of lanthanide (Ln = La, Nd, Eu) nitrates by solutions of decyl-, dicyclohexano- and dibenzo-18-crown-6 in 1,2-dichloroethane from aqueous perchlorate solutions in the range of pH values from 0.3 to 3 was studied by the method of spectrophotometry. It was ascertained that ions of the above-mentioned metals are extracted most effectively at pH = 1.6-2.0, moreover, the highest degree of extraction is observed for neodymium nitrate. Extractability of dibenzo-18-crown-6 proved higher than that of two other crown ethers (L). The composition of the complexes extracted, i.e. [M(L)2(NO3)](ClO4)2, was ascertained. Concentrational constants of extraction and separation factors for lanthanide nitrates studied were calculated

Abstract (Russian)

С использованием метода спектрофотометрии изучена экстракция нитратов лантанидов (Ln = La, Nd, Eu) растворами децил-, дициклогексано- и дибензо-18-краун-6 в 1,2-дихлорэтане из водных перхлоратных растворов в интервале значений рН 0,5-3. Установлено, что наиболее эффективно ионы указанных металлов извлекаются при рН = 1,6-2,0, причем наибольшая степень извлечения наблюдается для нитрата неодима. Экстракционная способность дибензо-18-краун-6 оказалась выше, чем двух других краун-эфиров (L). Определен состав экстрагируемых комплексов: [M(L)2(NO3)](ClO4)2. Рассчитаны концентрационные константы экстракции и коэффициенты разделения для изучения нитратов лантанидов

Additional details

Additional titles

Original title (Russian)
Взаимодействие нитратов лантана, неодима и европия с краун-эфирами децил-, дициклогексано- и дебензо-18-краун-6

Publishing Information

Journal Title
Izvestiya Vysshikh Uchebnykh Zavedenij, Khimiya i Khimicheskaya Tekhnologiya
Journal Volume
43
Journal Issue
6
Journal Page Range
p. 15-16
ISSN
0579-2991
CODEN
IVUKAR

INIS

Country of Publication
Russian Federation
Country of Input or Organization
Russian Federation
INIS RN
33002259
Subject category
S37: INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY;
Descriptors DEI
AQUEOUS SOLUTIONS; CHLORINATED ALIPHATIC HYDROCARBONS; CONCENTRATION RATIO; COORDINATION VALENCES; CROWN ETHERS; DISTRIBUTION FUNCTIONS; EUROPIUM COMPLEXES; LANTHANUM COMPLEXES; MULTI-ELEMENT SEPARATION; NEODYMIUM COMPLEXES; NITRATES; PERCHLORATES; PH VALUE; SOLVENT EXTRACTION
Descriptors DEC
CHLORINE COMPOUNDS; COMPLEXES; DISPERSIONS; ETHERS; EXTRACTION; FUNCTIONS; HALOGEN COMPOUNDS; HALOGENATED ALIPHATIC HYDROCARBONS; HOMOGENEOUS MIXTURES; MIXTURES; NITROGEN COMPOUNDS; ORGANIC CHLORINE COMPOUNDS; ORGANIC COMPOUNDS; ORGANIC HALOGEN COMPOUNDS; ORGANIC OXYGEN COMPOUNDS; OXYGEN COMPOUNDS; RARE EARTH COMPLEXES; SEPARATION PROCESSES; SOLUTIONS; VALENCE

Optional Information

Notes
4 refs.; 2 figs.