【摘要】 本文用萃取法测定了（Ⅰ）Y（Ⅲ）/0.5MNaClO₄/PMTFP—C₆H₆和（Ⅱ）Y（Ⅲ）/0.5MNaClO₄/PMTFP—TBP—C₆H₆及（Ⅲ）Y（Ⅲ）/0.5MNaClO₄/PMTFP—TOPO—C₆H₆体系的萃取平衡常数和协苹平衡常数,结果如下: 体系（Ⅰ）的1gK3₃₀=-3.36;体系（Ⅱ）的1gK₃₂=4.47; 体系（Ⅲ）的1gK₃₁=6.65、1gK₃₂=9.08。更多还原

【Abstract】 The extraction of yttrium(III) from perchloric acid solutions into mixtures of l-phenyl-3-methyl-4-trifluoroacetyl-pyrazol-one-5 (PMTFP) and neutral organophosphorus extractants, e. g. tri-n-butylphosphate (TBP) or tri-n-octylphosphinoxide(TOPO), in benzene has been studied.The formula of the extracted species have been shown to be YA3 S and YA3 2S (where HA = PMTFP, S = TBP, TOPO), and their equilibrium constants have been calculated. It is found to be greater for such mixtures than the either component alone.更多还原