Liquid–liquid extraction and separation of lanthanum(III) from titanium(IV), zirconium(IV), hafnium(IV), thorium(IV) and uranium(VI)

The Analyst ◽  
1995 ◽  
Vol 120 (2) ◽  
pp. 391-393 ◽  
Author(s):  
N. G. Bhilare ◽  
V. M. Shinde
Keyword(s):  
Liquid Extraction ◽  
Extraction And Separation ◽  
Liquid Liquid Extraction

scholarly journals Extraction and separation of titanium(IV) with D2EHPA and PC-88A from aqueous perchloric acid solutions

2002 ◽  
Vol 67 (7) ◽  
pp. 507-521 ◽  
Author(s):  
Rajeev Singh ◽  
Purshottamm Dhadke
Keyword(s):  
Liquid Extraction ◽  
Acid Solutions ◽  
Extraction And Separation ◽  
Slope Analysis ◽  
Liquid Liquid Extraction ◽  
Quantitative Extraction ◽  
Aqueous Perchloric Acid ◽  
Loaded Organic Phase ◽  
Species Being

The liquid-liquid extraction of Ti(IV) from perchlorate media using di(2-ethylhexyl) phosphoric acid (D2EHPA) and 2-ethylhexyl prosphonic acid mono-2-ethylhexyl ester (PC-88A) in toluene as the extractant was studied Quantitative extraction of Ti(IV) was observed in the lower acidity range of 0.01 to 0.1 mol dm-3 with 0.003 mol dm-3 D2EHPA and 0.01 mol dm-3 PC-88A in toluene, respectively, and in the higher acidity range of 9.0 to 10.0 mol dm-3 with 0.1 mol dm-3 D2EHPA and PC-88A in toluene. Ti(IV) was completely stripped from the metal loaded organic phase of both the extractants with 3%H2O2 in 1M H2SO4 and determined spectrophotometrically. The stoichiometry of the extracted species was determined on the basis of slope analysis. The extraction in the lower acidity range was found to proceed by a cation-exchange mechanism with the extracted species being TiOR2.2HR while in the higher acidity range it was by solvation with the extracted species being Ti(OH)3ClO4.4HR. Separation of Ti(IV) was also carried out from some associated metals like Fe(III), Al(III), V(V), Ce(IV), Mg(II) and Mn(II). The developed methods were extended for the determination of Ti(IV) in real samples like ilmenite, magnetite and red mud in order to show the practical utility of the extractants.

Chloride leaching of lanthanum and cerium from Indian red mud and metal separation studies

2019 ◽  
Vol 116 (2) ◽  
pp. 210 ◽  
Author(s):  
Abhilash ◽  
Pratima Meshram ◽  
Shivendra Sinha ◽  
Banshi Dhar Pandey ◽  
Vasudevan Krishna Kumari ◽  
...  
Keyword(s):  
Red Mud ◽  
Acid Leaching ◽  
Liquid Extraction ◽  
Agitation Rate ◽  
Extraction And Separation ◽  
Metal Separation ◽  
Liquid Liquid Extraction ◽  
Hydrochloric Acid Medium ◽  
Maximum Extraction ◽  
Chloride Leaching

Bench-scale experiments were conducted to recover lanthanum and cerium from Indian red mud in a hydrochloric acid medium. The method includes acid leaching of red mud pulp and subsequent liquid-liquid extraction of the leached metals with different organic extractants, in order to establish the technical feasibility of extraction and separation simultaneously. The maximum extraction of 88.5% La was achieved at 95 °C, using 1 M HCl, S/L ratio = 1/100 in 1 h with 200 rpm agitation rate. At this temperature, cerium recovery (99.9%) was found to be maximum. The maximum recovery of cerium (99.9%) can be achieved even at 55 °C, while the recovery of lanthanum lowered to 78.5% under same conditions. Liquid-liquid extraction of leached metals was tested to be complete and selective using Cyanex 923, as against Cyanex 301 and Cyanex 272.

Liquid–Liquid Extraction and Separation of Cobalt and Lithium Ions Using a Slug Flow Microreactor

2018 ◽  
Vol 51 (3) ◽  
pp. 222-228 ◽  
Author(s):  
Yuki Hirayama ◽  
Mikiya Hinoue ◽  
Hayato Tokumoto ◽  
Akira Matsuoka ◽  
Koji Noishiki ◽  
...  
Keyword(s):  
Slug Flow ◽  
Liquid Extraction ◽  
Lithium Ions ◽  
Extraction And Separation ◽  
Liquid Liquid Extraction ◽  
Flow Microreactor
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