Contribution to the thermodynamics of 2,6-dinitrophenol, picric acid, dipicrylamine, and α-hexyl in two-phase water-nitrobenzene extraction system

1985 ◽  
Vol 108 (2) ◽  
pp. 549-550 ◽  
Author(s):  
Emanuel Makrlík
Keyword(s):  
Picric Acid ◽  
Extraction System ◽  
Two Phase ◽  
Phase Water

scholarly journals Distribution of micro-amounts of europium in the two-phase water-HCl-nitrobenzene-N,N'-dimethyl-N,N'-diphenyl-2,6-dipicolinamide-hydrogen dicarbollylcobaltate extraction system

2009 ◽  
Vol 74 (7) ◽  
pp. 781-787 ◽  
Author(s):  
Emanuel Makrlík ◽  
Petr Vaňura ◽  
Pavel Selucký ◽  
Vasily Babain ◽  
Ivan Smirnov
Keyword(s):  
Stability Constants ◽  
Organic Phase ◽  
Extraction And Stability Constants ◽  
Extraction System ◽  
Hydrogen Dicarbollylcobaltate ◽  
Nitrobenzene Solution ◽  
Two Phase ◽  
Equilibrium Data ◽  
Phase Water

Extraction of micro-amounts of europium by a nitrobenzene solution of hydrogen dicarbollylcobaltate (H+B-) in the presence of N,N'-dimethyl- -N,N'-diphenyl-2,6-dipicolinamide (MePhDPA, L) was investigated. The equilibrium data were explained assuming that the species HL+, + HL2 , 3+ EuL2 and 3+ EuL3 are extracted into the organic phase. The values of the extraction and stability constants of the species in nitrobenzene saturated with water were determined.

Ionic product of water in the nitrobenzene phase of the two-phase water-nitrobenzene extraction system

1991 ◽  
Vol 56 (4) ◽  
pp. 760-763
Author(s):  
Emanuel Makrlík
Keyword(s):  
Thermodynamic Parameters ◽  
Extraction System ◽  
Two Phase ◽  
Nitrobenzene Phase ◽  
Ionic Product ◽  
Phase Water ◽  
General Relations

General relations among thermodynamic parameters, which characterize the transfer of the ions H+ and OH- from the aqueous into nitrobenzene phase of the two-phase water-nitrobenzene extraction system and dissociation equilibria of H2O in both phases of this system, have been derived. Further, using the known parameters ionic product of water in nitrobenzene saturated with water has been evaluated for a temperature of 25°C: PnbH2O = 10-29.2 mol2 dm-6.

Chemical equilibria including particles I-, I3-, I5-, and I2 in two-phase water-nitrobenzene extraction system

1990 ◽  
Vol 55 (11) ◽  
pp. 2602-2605 ◽  
Author(s):  
Emanuel Makrlík
Keyword(s):  
Thermodynamic Parameters ◽  
Aqueous Phase ◽  
Equilibrium Constants ◽  
Extraction System ◽  
Two Phase ◽  
Chemical Equilibria ◽  
Phase Water ◽  
General Relations ◽  
Homogeneous Reactions

General relations among thermodynamic parameters characterizing chemical equilibria with species I-, I3-, I5-, and I2 in the two-phase water-nitrobenzene extraction system have been derived. Furthermore, these relations have been used for calculating equilibrium constants K1aq(I3-) and K2aq(I5-) corresponding to homogeneous reactions I-(aq) + I2(aq) ⇄ I3-(aq) and I3-(aq) + I2(aq) ⇄ I5-(aq) proceeding in the aqueous phase of the system under study. Finally, stability of polyiodides I3- and I5- in both phases has been discussed.

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