scholarly journals Extraction behavior of carrier-free and macro amounts of molybdenum and tungsten from HCl solution

2011 ◽  
Vol 1 (1) ◽  
pp. 127-129
Author(s):  
K. Ooe ◽  
W. Yahagi ◽  
Y. Komori ◽  
H. Fujisawa ◽  
R. Takayama ◽  
...  
Keyword(s):  
Solvent Extraction ◽  
Chloroform Solution ◽  
Aliquat 336 ◽  
Extraction Behavior ◽  
Polynuclear Species ◽  
Carrier Free ◽  
Hcl Solution ◽  
Good Agreement ◽  
And Tungsten

AbstractSolvent extraction behavior of carrier-free Mo and W from 0.1–11 M HCl into 0.05 M Aliquat 336-chloroform solution was investigated and compared with that of macro amounts of Mo and W. The distribution ratios of carrier-free Mo and W were in good agreement with those of macro amounts of Mo and W in 6–11 M HCl, while the extraction efficiencies of carrier-free Mo and W were different from those of macro amounts of Mo and W in <6 M HCl. Therefore, it appears that the carrier-free as well as macro amounts of Mo and W form mononuclear species in 6–11 M HCl. The disagreement in <6 M HCl is probably due to the formation of polynuclear species of the macro amounts of Mo and W.

Solvent extraction of Mo(V) and Mo(VI) from hydrochloric acid into Aliquat 336 chloroform solution

2014 ◽  
Vol 301 (3) ◽  
pp. 751-756 ◽  
Author(s):  
T. Yokokita ◽  
Y. Kasamatsu ◽  
K. Ooe ◽  
T. Yoshimura ◽  
N. Takahashi ◽  
...  
Keyword(s):  
Solvent Extraction ◽  
Hydrochloric Acid ◽  
Chloroform Solution ◽  
Aliquat 336

Solvent extraction using carrier-free radiotracers of Mo and W from HCl and HCl/LiCl solutions into Aliquat 336

2014 ◽  
Vol 303 (2) ◽  
pp. 1091-1094 ◽  
Author(s):  
T. Yokokita ◽  
K. Ooe ◽  
Y. Kasamatsu ◽  
T. Yoshimura ◽  
N. Takahashi ◽  
...  
Keyword(s):  
Solvent Extraction ◽  
Aliquat 336 ◽  
Carrier Free

scholarly journals Recoveries of Ru(III) and Co(II) by Solvent Extraction and Ion Exchange from Tungsten Carbide-Cobalt Scrap through a HCl Leaching Solution

Metals ◽  
2019 ◽  
Vol 9 (8) ◽  
pp. 858 ◽  
Author(s):  
Hyeong Hun Ahn ◽  
Man Seung Lee
Keyword(s):  
Solvent Extraction ◽  
Ion Exchange ◽  
Separation Factor ◽  
Aliquat 336 ◽  
Anion Exchange Resins ◽  
Hard Metals ◽  
Leaching Solution ◽  
Hcl Concentration ◽  
Exchange Resins ◽  
Hcl Solution

The addition of ruthenium to tungsten carbide-cobalt hard metals improves their mechanical properties. Since ruthenium is a platinum group metal, the recovery of ruthenium together with cobalt from the scrap of hard metals is of great importance. In order to develop a recovery process of ruthenium and cobalt, separation experiments were performed from the synthetic HCl leaching solution of the scrap of hard metals. In this work, solvent extraction and ion exchange were employed to investigate the separation behavior of the two metal ions as a function of HCl concentration. Ru(III) was selectively extracted over Co(II) by Aliquat 336 (trioctyl methylammonium chloride) and Alamine 300 (tri-n-octyl amine) when HCl concentration was lower than 5 M. The highest separation factor between Ru(III) and Co(II) was obtained at 3 M HCl. The loaded Ru(III) was stripped from Aliquat 336 by dilute HCl solution. Only Ru(III) was loaded into the anion exchange resins employed in this work in the HCl concentration range from 1 to 9 M. The highest loading percentage of Ru(III) was obtained from 3 M HCl solution. The loading of Ru(III) into anion exchange resins followed Freundlich isotherm and the loading capacity of the resins were determined. The loaded Ru(III) was eluted by the mixture of HCl and thiourea. Compared to solvent extraction, ion exchange was found to be more efficient to separate Ru(III) and Co(II) from the HCl solution in terms of separation factor and the ease of operation.

scholarly journals Solvent-Extraction Behavior of Carrier-Free Rhodium

1968 ◽  
Vol 41 (6) ◽  
pp. 1458-1459 ◽  
Author(s):  
Tomitaro Ishimori ◽  
Yoshii Kobayashi ◽  
Yoshie Usuba
Keyword(s):  
Solvent Extraction ◽  
Extraction Behavior ◽  
Carrier Free

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.

Enhanced extraction and separation of zirconium(IV) and hafnium(IV) with 3-phenyl-4-benzoyl-5-isoxazolone in presence of various neutral organophosphorus extractants

2007 ◽  
Vol 95 (5) ◽  
Author(s):  
K. Janardhan Reddy ◽  
A. Varada Reddy ◽  
B. S. Shaibu ◽  
M. L. P. Reddy
Keyword(s):  
Solvent Extraction ◽  
Hydrochloric Acid ◽  
Acid Solutions ◽  
Extraction And Separation ◽  
Extraction Behavior ◽  
Hydrochloric Acid Solutions ◽  
Organophosphorus Extractants

Various 3-phenyl-4-aroyl-5-isoxazolones, namely, 3-phenyl-4-benzoyl-5-isoxazolone (HPBI), 3-phenyl-4-(4-fluorobenzoyl)-5-isoxazolone (HFBPI) and 3-phenyl-4-(4-toluoyl)-5-isoxazolone (HTPI) were synthesized and examined with regard to the solvent extraction behavior of Zr(IV) and Hf(IV) from hydrochloric acid solutions. The results demonstrated that Zr(IV) and Hf(IV) extracted into chloroform with 3-phenyl-4-aroyl-5-isoxazolones (HA), as ZrOA

scholarly journals Solvent extraction separation of zirconium(IV) from succinate media with N-n-octylaniline

2006 ◽  
Vol 71 (3) ◽  
pp. 223-234 ◽  
Author(s):  
M.M. Rajmane ◽  
B.M. Sargar ◽  
S.V. Mahamuni ◽  
M.A. Anuse
Keyword(s):  
Solvent Extraction ◽  
Binary Mixture ◽  
Extraction Behavior ◽  
Quantitative Extraction ◽  
Extraction Separation ◽  
Ph Range

The extraction behavior of zirconium(IV) from succinate (0.01 - 0.03 M) medium (25 mL) with 10 mL 3 % N-n-octylaniline in xylene was investigated. The pH range 3.7 - 5.0 was effective for the quantitative extraction of zirconium(IV). Zirconium(IV) was back extracted with 0.5 M HNO3 (3 x 5 mL). The method was free from interferences of a large number of cations and anions. Zirconium(IV) was separated from associated elements in its binary mixture with Mo(VI), Nb(V), Re(VII), La(III), Ti(IV), Th(IV) and Al(III). The proposed method was applied to synthetic mixtures. The results of analysis indicate that trace amounts of zirconium( IV) could be separated effectively from higher amounts of other elements. The method is simple, selective, rapid and eco-friendly.

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