摘要
研究了三辛基氧化膦（ＴＯＰＯ）的正辛烷溶液萃取硫氰酸的分配平衡和三辛基氧化膦从硫氰酸介质中对镍（Ⅱ）的萃取平衡．结果表明：ＴＯＰＯ与硫氰酸形成ＴＯＰＯ·ＨＳＣＮ萃合物，萃取常数ｌｇβ＝２．４２；萃取镍（Ⅱ）时形成Ｎｉ（ＳＣＮ）２：·２ＴＯＰＯ和Ｎｉ（ＳＣＮ）２·４ＴＯＰＯ两种萃合物，萃取平衡常数分别为ｌｇＫ２＝４．７３和ｌｇＫ２＝７．１２，ＴＯＰＯ在硫氰酸介质中对Ｎｉ（Ⅱ）有较强的萃取能力．
The extraction equilibrium of thiocyanic acid and nickel thioanate with trioctylphosphine oxide (TOPO) have been studied at 298±1 K. The results showed that extracted complex TOPO. HSCN with extraction equilibria constant 10 2. 42 formed andNi(SCN)2. 2TOPO.(0) and Ni(SCN)2. 4TOPO(0.)are extracted from thiocyanate from thiocyanate solution into TOPO-Octane. Their extraction equilibrium are determined to be 104.73 and 107.12 respectively.
出处
《山东大学学报（自然科学版）》
CSCD
1995年第4期436-440,共5页
Journal of Shandong University(Natural Science Edition)
关键词
三辛基氧化膦
镍
硫氰酸
萃取
trioctylphosphine oxide
nickel
thiocyanic acid
extraction
