SELECTIVE LIQUID-LIQUID EXTRACTION OF PALLADIUM(II) FROM HYDROCHLORIC ACID MEDIA BY DI-(2-ETHYLHEXYL) THIOPHOSPHORIC ACID (DEHTPA)

1999 ◽  
Vol 17 (2) ◽  
pp. 333-349 ◽  
Author(s):  
M. Rovira ◽  
J. L. Cortina ◽  
A. M Sastre
Keyword(s):  
Hydrochloric Acid ◽  
Liquid Extraction ◽  
Thiophosphoric Acid ◽  
Acid Media ◽  
Liquid Liquid Extraction ◽  
Hydrochloric Acid Media

scholarly journals Selective liquid-liquid extraction of antimony(III) from hydrochloric acid media by N-n-octylaniline in xylene

2004 ◽  
Vol 69 (4) ◽  
pp. 283-298 ◽  
Author(s):  
B.M. Sargar ◽  
M.M. Rajmane ◽  
M.A. Anuse
Keyword(s):  
Hydrochloric Acid ◽  
Metal Ion ◽  
Liquid Extraction ◽  
Reagent Concentration ◽  
Acid Media ◽  
Liquid Liquid Extraction ◽  
Semiconductor Thin Films ◽  
Extraction Separation ◽  
Acid Reagent ◽  
Hydrochloric Acid Media

N-n-Octylaniline in xylene was used for the extraction separation of antimony( III) from hydrochloric acid media. Antimony(III) was extracted quantitatively with 10 mL4%N-n-octylaniline in xylene. It was stripped from the organic phase with 0.5 M ammonia and estimated photometrically by the iodide method. The effect of metal ion, acid, reagent concentration and various foreign ions was investigated. The method affords binary and ternary separation of antimony(III) from tellurium(IV), selenium( IV), lead(II) bismuth(III), tin(IV), germanium(IV), copper(II), gold(III), iron(III) and zinc(II). The method is applicable for the analysis of synthetic mixtures alloys and semiconductor thin films. It is fast, accurate and precise.

scholarly journals Liquid-liquid extraction and recovery of gallium(III) from acid media with 2-octylaminopyridine in chloroform: Analysis of bauxite ore

2010 ◽  
Vol 75 (8) ◽  
pp. 1099-1113 ◽  
Author(s):  
Sandip Mahamuni ◽  
Prakash Wadgaonkar ◽  
Mansing Anuse
Keyword(s):  
Hydrochloric Acid ◽  
Equilibrium Constants ◽  
Standard Addition ◽  
Liquid Extraction ◽  
Acid Media ◽  
Weak Organic Acid ◽  
Liquid Liquid Extraction ◽  
Extraction Reaction ◽  
Bauxite Ore

The liquid-liquid extraction of gallium(III) from hydrochloric acid solution using 2-octylaminopyridine (2-OAP) in chloroform was investigated. The extraction of gallium(III) from 6.0-9.0 mol dm-3 hydrochloric acid was found to be quantitative using 0.033 mol dm-3 2-OAP in chloroform. The effect of the reagent concentration and other parameters on the extraction of gallium(III) was also studied. The stoichiometry of the extracted species of gallium(III) was determined based on the slope analysis method. The extraction reaction proceeded via the anion exchange mechanism from hydrochloric acid and the extracted species was [RR?NH2+GaCl4-]org. The extraction of gallium(III) was performed in the presence of various ions to ascertain the tolerance limit to individual ions. The temperature dependence of the extraction equilibrium constants was examined to estimate the apparent thermodynamic functions (?H, ?S and ?G) for the extraction reaction. Gallium(III) was successfully separated from commonly associated metal ions, such as Zn(II), Pb(II), Cd(II), Hg(II), Bi(III), Al(III), Se(IV), Sb(III), Sn(IV), In(III), Tl(I) and Tl(III). However, gallium(III) was separated from Fe(III) from weak organic acid media. The procedure was also extended to the determination of gallium(III) in bauxite ore by the standard addition method.

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