Effect of Physical Parameters on the Stirred Separation Process in Rare Earth Extraction System

2014 ◽  
pp. 27-29
Author(s):  
Wang Shuchan ◽  
Zhang Zimu ◽  
Zhang Ting-An ◽  
Zhao Qiuyue ◽  
Liu Yan ◽  
...  
Keyword(s):  
Rare Earth ◽  
Separation Process ◽  
Extraction System ◽  
Physical Parameters ◽  
Rare Earth Extraction

Effect of Oxidation Behavior of (Nd,Dy)-Fe-B Magnet on Heavy Rare Earth Extraction Process

2021 ◽  
Vol 28 (2) ◽  
pp. 91-96
Author(s):  
Sangmin Park ◽  
◽  
Sun-Woo Nam ◽  
Sang-Hoon Lee ◽  
Myung-Suk Song ◽  
...  
Keyword(s):  
Rare Earth ◽  
Oxidation Behavior ◽  
Extraction Process ◽  
Heavy Rare Earth ◽  
Rare Earth Extraction

Extraction Behavior of Rare Earths in Ion Liquid Extraction System Using 1-Butyl-3-Methyl-Imidazolium Hexafluorophosphate and Benzoyl Acetone

2011 ◽  
Vol 335-336 ◽  
pp. 1428-1432 ◽  
Author(s):  
Zhong Wei Pan ◽  
Chang Ma ◽  
Ying Wu Zhang ◽  
Yu Xia Huang ◽  
Xing Lin Chen ◽  
...  
Keyword(s):  
Ionic Liquid ◽  
Rare Earth ◽  
Rare Earths ◽  
Liquid Extraction ◽  
Rare Earth Ions ◽  
Extraction System ◽  
Tetraacetic Acid ◽  
Extraction Percentage ◽  
Extraction Solvent ◽  
Extraction Behavior

The extraction behavior of five rare earth ions (RE3+) was investigated in ionic liquid (IL) extraction system using 1-butyl-3-methyl-imidazolium hexafluorophosphate ionic liquid ([Bmim]PF6) as extraction solvent and benzoyl acetone (HA) as extractant. The extraction percentage of RE3+ using [Bmim]PF6 was less than 8% without HA. When sufficient HA was included in IL phase, the extraction percentage of RE3+ could be higher than 98%. The extracted species in the RE3+-[Bmim]PF6-HA system was neutral REA3 and the recovery of RE3+ extracted into [Bmim]PF6 can be achieved using the mixture of hydrazine hydrate and ethylenediamine tetraacetic acid (EDTA) as stripping agent. [Bmim]PF6 can be recycled in the experiment.

ChemInform Abstract: Determination of Physical Parameters in 4f-3d Intermetallics by Rare Earth Moeβbauer Spectroscopy

ChemInform ◽  
1990 ◽  
Vol 21 (1) ◽  
Author(s):  
P. C. M. GUBBENS ◽  
A. M. VAN DER KRAAN ◽  
K. H. J. BUSCHOW
Keyword(s):  
Rare Earth ◽  
Physical Parameters

Enrichment of trace rare earth elements from the leaching liquor of ion-absorption minerals using a solid complex centrifugal separation process

2018 ◽  
Vol 20 (9) ◽  
pp. 1998-2006 ◽  
Author(s):  
Yanliang Wang ◽  
Xiangguang Guo ◽  
Yanfeng Bi ◽  
Jia Su ◽  
Weichang Kong ◽  
...  
Keyword(s):  
Rare Earth ◽  
Rare Earth Elements ◽  
Separation Process ◽  
Centrifugal Separation ◽  
Solid Complex ◽  
Ion Absorption ◽  
Re Elements

A novel solid complex centrifugal separation (SCCS) process has been developed to enrich trace rare earth (RE) elements from the leaching liquor of ion-absorption RE minerals.

Recovery of nitrogen from saponification wastewater by struvite precipitation

2010 ◽  
Vol 61 (11) ◽  
pp. 2741-2748 ◽  
Author(s):  
Haiming Huang ◽  
Xianming Xiao ◽  
Liping Yang ◽  
Bo Yan
Keyword(s):  
Grain Size ◽  
Rare Earth ◽  
Size Range ◽  
Separation Process ◽  
Ammonium Concentration ◽  
Subsequent Reaction ◽  
Ammonium Removal ◽  
Seeding Material ◽  
Series Of Experiments ◽  
Struvite Precipitation

In general, saponification wastewater produced from the separation process of rare-earth elements contains high ammonium concentration. In this study, a series of experiments were conducted to investigate the parameters to enhance the struvite precipitation potential for ammonium removal from the wastewater having an ammonium concentration of 4,100 mg/L. Experimental results showed that increasing the dose and grain size of pre-formed struvite, which was added as the seeding material in struvite reaction, could increase ammonium removal. The removal efficiency increased 7.6% when the dose of pre-formed struvite with crystal grain size range of 0.098–0.150 mm increased from 0 g/L to 60 g/L. Additionally, struvite precipitation was tested with the intermittent addition of magnesium and phosphate to utilize the struvite crystals formed during the reaction process as the seeding material for the subsequent reaction. The results revealed that intermittently adding magnesium 7 times effectively enhanced ammonium removal by around 8%, which was equivalent to that of using pre-formed struvite as the seeding material. Furthermore, the chemical composition of the struvite recovered with intermittent addition of magnesium was characterized, showing the struvite could be used as fertilizer. An economic evaluation indicated that intermittent addition of magnesium 7 times can save 13.4% cost for recovering per kg NH4+ compared to that of bulk addition.

Effect of impurity ions on preparation of novel saponifier for rare earth extraction

2013 ◽  
Vol 31 (9) ◽  
pp. 905-910 ◽  
Author(s):  
Yanfei XIAO ◽  
Zongyu FENG ◽  
Xiaowei HUANG ◽  
Li HUANG ◽  
Yang XU ◽  
...  
Keyword(s):  
Rare Earth ◽  
Impurity Ions ◽  
Rare Earth Extraction
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