Published April 2004 | Version v1
Journal article Metadata-only

Solubilities of LaF3 and YbF3 in solutions containing sulfuric and phosphoric acids

Creators

  • 1. Inst. Khimii i Tekhnologii Redkikh Ehlementov i Mineral'nogo Syr'ya im. I.V. Tananaeva, KNTs RAN, Apatity (Russian Federation)

Description

LaF3 and YbF3 solubilities at 20 Deg C in solutions containing 0-2.325 mol/l (0-20 wt %) H2SO4 and 0-27.6 g/l H3PO4 (0-20 g/l P2O5) have been determined. Higher solubilities in sulfuric solutions compared to hydrochloric or nitric solutions are due to formation of fluorosulfate complex anions. The effect of low phosphate ion concentrations in La F3 and YbF3 solubilities on sulfuric solutions is discussed, a swell as effect fluoride ion on recovery of lanthanum and ytterbium during sulfuric acid leaching of phosphogypsum

Abstract (Russian)

При 20 град С определена растворимость LaF3 и YbF3 в растворах, содержащих 0-2.325 мол/л (0-20 мас. %) H2SO4 и 0-27.6 г/л H3PO4 (0-20 г/л P2O5). Более высокая растворимость в сернокислых растворах по сравнению с соляно- и азотистокислыми растворами объяснена образованием фтор-сульфатных комплексных анионов. Обсуждено влияние малых концентраций фторат-иона на растворимость La F3 и YbF3 в сернокислых растворах, а также влияние иона фосфора на извлечение лантана и иттербия в процессе сернокислотного выщелачивания их из фосфогипса

Additional details

Additional titles

Original title (Russian)
Растворимост' LaF

Publishing Information

Journal Title
Zhurnal Neorganicheskoj Khimii
Journal Volume
49
Journal Issue
4
Journal Page Range
p. 707-710
ISSN
0044-457X
CODEN
ZNOKAQ

INIS

Country of Publication
Russian Federation
Country of Input or Organization
Russian Federation
INIS RN
37037116
Subject category
S37: INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY;
Descriptors DEI
AQUEOUS SOLUTIONS; CONCENTRATION RATIO; LANTHANUM COMPLEXES; LANTHANUM FLUORIDES; MIXED SOLVENTS; PHOSPHORIC ACID; SOLUBILITY; SULFATES; SULFURIC ACID; TEMPERATURE RANGE 0273-0400 K; YTTERBIUM COMPLEXES; YTTERBIUM FLUORIDES
Descriptors DEC
COMPLEXES; DIMENSIONLESS NUMBERS; DISPERSIONS; FLUORIDES; FLUORINE COMPOUNDS; HALIDES; HALOGEN COMPOUNDS; HOMOGENEOUS MIXTURES; HYDROGEN COMPOUNDS; INORGANIC ACIDS; INORGANIC COMPOUNDS; LANTHANUM COMPOUNDS; MIXTURES; OXYGEN COMPOUNDS; PHOSPHORUS COMPOUNDS; RARE EARTH COMPLEXES; RARE EARTH COMPOUNDS; SOLUTIONS; SOLVENTS; SULFUR COMPOUNDS; TEMPERATURE RANGE; YTTERBIUM COMPOUNDS

Optional Information

Notes
14 refs., 3 tabs.