摘要
研究了三辛基氧化膦（ＴＯＰＯ）从高氯酸介质中萃取钯的热力学。通过考察［ＴＯＰＯ］对Ｐｄ（ＩＩ）的影响，测出了萃取反应的表观平衡常数Ｋ、焓变△Ｈ、自由能变△Ｇ和熵变△Ｓ。
Studied here is the thermodynamic of the extractin of palladium with tri-n-octyl phosphine oxide(TOPO) from perchloric acid medium.By investigating the influeneces of temperature and[TOPO] upon the distribution ratio D of Pd(Ⅱ),it is concluded that when the initial concentration of ClO - 4 is 0.1 mol/L,the relationship between lg D and lg[TOPO] at 25℃ is represented as lg-D-=3.871lg[TOPO]+10.50 and that when the initial concentration of TOPO and pH are 1.0×10 -3 mol/L and 0.80 respectively,the relationship between lg D and 1/ T is shown as lg D =1 031.8/ T -4.222 The values of thermodynamic function at 25℃ are as follows: K ex=3.16×10 8;△ H =-19.77kJ/mol; △ G =-48.52kJ/mol;△ S =96.41J/mol·K.
出处
《宝鸡文理学院学报（自然科学版）》
CAS
1999年第4期20-22,共3页
Journal of Baoji University of Arts and Sciences(Natural Science Edition)
关键词
萃取
热力学
钯
三辛基氧化膦
extracting thermodynamic
palladium
tri-n-octyl phosphine oxide
