Abstract
ABSTRACT The effect of Na+ Ca2+ Mg2+ and C1− ions upon the solvent extraction of boron from aqueous solutions has been studied. The extraction of Na+, Ca2+ Mg2+ and C1− ions singly and in various mixtures into 2-ethy1-1,3-hexanediol(EHD),2-chloro-4-(1,1,3,3-tetramethylbuty1) -6-methylolphenol (CTMP) and 1:1 mixture of the two is considered here. The results show that in the absence of borates each of the solvent systems will extract a small amount of dissolved Na Na+, Mg2+ and Ca2+ cations, presumably as solvated ion pairs, and the order of extraction is generally CTMP > CTMP/EHD > EHD and Ca2+ > Mg2+ > Na+ (all exhibiting considerable increase with pH). A maximum is achieved for calcium with CTMP at pH 11. These observations are consistent with larger bulk shielding effect of CTMP in ion-pair formation and also with its (likely) stronger acidity. The same general trends are observable in the extraction of the same cations in the presence of boron, but the effects are much greater. However, the extent of ...
Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
