ISSN:
1588-2780
Source:
Springer Online Journal Archives 1860-2000
Topics:
Chemistry and Pharmacology
,
Energy, Environment Protection, Nuclear Power Engineering
Notes:
Abstract The synergistic extraction of alkaline earth cations from 1M NaNO3 aqueous solutions with 3-phenyl-4-benzoylisoxazol-5-one (HPBI) and tri-n-octylphosphine oxide (TOPO) in toluene at 25°C has been studied. The extraction efficiency follows the order Ba2+〈Sr2+〈Ca2+〈Mg2+, which is the same as that previously observed with 1-phenyl-3-methyl-4-benzoyl-pyrazol-5-one (HPMBP). The extraction occurs at a lower pH range than with HPMBP because of the higher acidity of HPBI. The extracted species are M(PBI)2(TOPO) x withx=2 for M=Mg, Ca, Sr and Ba (logK 1,2,2=3.91, 1.18 and 0.29 respectively) and withx=3 for M=Sr and Ba (logK 1,2,3=3.28 and 2.07 respectively). The strong interactions which occur between HPBI and TOPO (logK int=1.84) have been considered in the extraction constant calculations. .
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF02039754
