Separation of cerium from other lanthanides by leaching with nitric acid rare earth(III) hydroxide-cerium(IV) oxide mixtures

1989 ◽  
Vol 132 (1) ◽  
pp. 105-113 ◽  
Author(s):  
T. Mioduski ◽  
Dong Anh Hao ◽  
Hoang Hong Luan
Keyword(s):  
Rare Earth ◽  
Nitric Acid

Selective Nitric Acid Leaching of Rare-Earth Elements from Calcium and Phosphate in Fluorapatite Concentrate

JOM ◽  
2019 ◽  
Vol 71 (12) ◽  
pp. 4578-4587 ◽  
Author(s):  
Seyed Ramin Banihashemi ◽  
Bijan Taheri ◽  
Seyed Mohammad Razavian ◽  
Faraz Soltani
Keyword(s):  
Rare Earth ◽  
Nitric Acid ◽  
Rare Earth Elements ◽  
Acid Leaching ◽  
Nitric Acid Leaching

Thermodynamic modeling of the water – Nitric acid – Rare earth nitrate systems

Calphad ◽  
2019 ◽  
Vol 67 ◽  
pp. 101683 ◽  
Author(s):  
Aleksey I. Maksimov ◽  
Nikita A. Kovalenko ◽  
Irina A. Uspenskaya
Keyword(s):  
Rare Earth ◽  
Nitric Acid ◽  
Thermodynamic Modeling ◽  
Rare Earth Nitrate

Extraction of rare-earth elements from nitric acid solutions with bis(dioctylphosphinylmethyl)phosphinic acid

2006 ◽  
Vol 48 (1) ◽  
pp. 47-52
Author(s):  
A. N. Turanov ◽  
V. K. Karandashev ◽  
A. N. Yarkevich ◽  
Z. V. Safronova
Keyword(s):  
Rare Earth ◽  
Nitric Acid ◽  
Rare Earth Elements ◽  
Phosphinic Acid ◽  
Acid Solutions ◽  
Nitric Acid Solutions

scholarly journals New Possibility for REE Determination in Oil

2012 ◽  
Vol 2012 ◽  
pp. 1-5 ◽  
Author(s):  
Alexander Soin ◽  
Tatiana Maryutina ◽  
Natalya Musina ◽  
Andrey Soin
Keyword(s):  
Rare Earth ◽  
Nitric Acid ◽  
Rare Earth Elements ◽  
Stationary Phase ◽  
Inductively Coupled Plasma ◽  
Sample Pretreatment ◽  
Accurate Method ◽  
Inductively Coupled ◽  
Novel Approach ◽  
Icp Ms

A novel approach of rare earth elements (REE) determination in crude oil is suggested. Special application of countercurrent chromatography (CCC) is used as a sample pretreatment tool. An oil sample is continuously pumped through the rotating coil column (RCC) as a mobile phase, while an aqueous phase (nitric acid solution) is retained as a stationary phase. Two phases are kept well mixed and agitated, but there is no emulsion at the interface under the chosen conditions. Special features of CCC give an opportunity to vary the volume of oil samples to be analyzed from 10 mL to 1 L or more. Trace metals are preconcentrated into 10 mL of stationary phase (acidic solutions) pumped out of the column so that analysis can be easily determined with inductively coupled plasma mass spectrometry (ICP-MS) without additional sample preparation procedures. Optimal concentration of nitric acid in the stationary phase for preconcentration of REE from oil by CCC has been investigated. The combination of CCC with ICP-MS gives the possibility to develop a rapid, reliable, and accurate method of trace metal including rare earth elements (REE) determination in crude oils and oil products. Such method could be an alternative for unexpanded and expensive neutron-activation analysis (NAA).

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