引用本文:
孙思修, 高自立, 沈静兰, 张洪林. P538萃取Fe(Ⅲ)的研究[J]. 应用化学,
2016, 4(5): 78-81.
Citation: Sun Sixiu, Gao Zili, Shen Jinglan, Zhang Honglin. STUDY ON THE EXTRACTION OF IRON(Ⅲ)WITH P538 IN KEROSENE[J]. Chinese Journal of Applied Chemistry, 2016, 4(5): 78-81.
Citation: Sun Sixiu, Gao Zili, Shen Jinglan, Zhang Honglin. STUDY ON THE EXTRACTION OF IRON(Ⅲ)WITH P538 IN KEROSENE[J]. Chinese Journal of Applied Chemistry, 2016, 4(5): 78-81.
P538萃取Fe(Ⅲ)的研究
摘要:
P538是一种单烷基磷酸萃取剂(ROP(O)(OH)2,R=C12-C18)[1],已见其基本萃取性能的报道[2]和萃取除Fe(Ⅲ)的应用。本文研究了它在煤油-硝酸盐介质间的分配平衡。并讨论了萃取机理。
English
STUDY ON THE EXTRACTION OF IRON(Ⅲ)WITH P538 IN KEROSENE
Abstract:
The extraction of Fe(Ⅲ) from nitrate solution with P538 in kerosene has been studied at 25℃. The proposed extraction mechanism is as follows:1. At higher loading 2Fe3+ +(5/j)(H2A)j(0)=FeA(HA)4(0)+6H+ 2. At lower Loading Fe3++(3/j)(H2A)j(0)=Fe(HA)3(0)+3H+ The apparent extraction equilibrium constants were calculated to be 1011.16 and 106.84,respectively. From the experimental results when the formular weight concentration of the extractant is less than 3·10-3mol·dm-3 the apparent polymerization degree is estimated about 1.5-1.7.
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