Downstream Processing - Solvent Extraction and Liquid Membrane Permeation

1989 ◽  
Vol 93 (9) ◽  
pp. 984-988 ◽  
Author(s):  
H. J. Bart ◽  
R. Marr ◽  
U. Bauer
Keyword(s):  
Solvent Extraction ◽  
Liquid Membrane ◽  
Downstream Processing ◽  
Membrane Permeation

scholarly journals Two-Step Solvent Extraction of Radioactive Elements and Rare Earths from Estonian Phosphorite Ore Using Nitrated Aliquat 336 and Bis(2-ethylhexyl) Phosphate

Minerals ◽  
2021 ◽  
Vol 11 (4) ◽  
pp. 388
Author(s):  
Silvester Jürjo ◽  
Liis Siinor ◽  
Carolin Siimenson ◽  
Päärn Paiste ◽  
Enn Lust
Keyword(s):  
Rare Earth ◽  
Solvent Extraction ◽  
Rare Earth Elements ◽  
Toxic Elements ◽  
Downstream Processing ◽  
Liquid Extraction ◽  
Aliquat 336 ◽  
Radioactive Elements ◽  
Improved Method ◽  
Ph Values

Estonian phosphorite ore contains trace amounts of rare earth elements (REEs), many other d-metals, and some radioactive elements. Rare earth elements, Mo, V, etc. might be economically exploitable, while some radioactive and toxic elements should be removed before any other downstream processing for environmental and nutritional safety reasons. All untreated hazardous elements remain in landfilled waste in much higher concentration than they occur naturally. To resolve this problem U, Th, and Tl were removed from phosphorite ore at first using liquid extraction. In the next step, REE were isolated from raffinate. Nitrated Aliquat 336 (A336[NO3]) and Bis(2-ethylhexyl) Phosphate (D2EHPA) were used in liquid extraction for comparison. An improved method for exclusive separation of radioactive elements and REEs from phosphorite ore in 2-steps has been developed, exploiting liquid extraction at different pH values.

scholarly journals Proposal of Liquid Membrane-FTIR Spectroscopy to Quantify the Oxygen Content in Soluble Fraction of Degradative Solvent-Extraction

2017 ◽  
Vol 2 (1) ◽  
pp. 1-10 ◽  
Author(s):  
Ketren Watcharakorn ◽  
Muangthongon Trairat ◽  
Wannapeera Janewit ◽  
Heishun Zen ◽  
Toshiteru Kii ◽  
...  
Keyword(s):  
Solvent Extraction ◽  
Ftir Spectroscopy ◽  
Oxygen Content ◽  
Liquid Membrane ◽  
Soluble Fraction
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