金属学报  1982, Vol. 18 Issue (2): 235-244

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磷酸三丁酯及烷基氧化膦萃取铂族金属氯络酸的机理

陈景;杨正芬;崔宁

冶金工业部贵金属研究所;冶金工业部贵金属研究所;冶金工业部贵金属研究所

THE MECHANISM OF EXTRACTING CHLORO-COMPLEX ACIDS OF PLATINOID WITH TRIBUTYL PHOSPHATE AND TRIALKYL PHOSPHINE OXIDE

Chen Jing;Yang Zhengfen;Cui Ning Institute of Precious Metals; Ministry of Metallurgical Industry; Kunming

陈景;杨正芬;崔宁. 磷酸三丁酯及烷基氧化膦萃取铂族金属氯络酸的机理[J]. 金属学报, 1982, 18(2): 235-244.
, , . THE MECHANISM OF EXTRACTING CHLORO-COMPLEX ACIDS OF PLATINOID WITH TRIBUTYL PHOSPHATE AND TRIALKYL PHOSPHINE OXIDE[J]. Acta Metall Sin, 1982, 18(2): 235-244.

摘要 参考文献 相关文章 Metrics 全文: PDF(959 KB)   摘要: 本文考察了 TBP 萃取 Pt(Ⅳ),Pd(Ⅳ),Ir(Ⅳ),Pt(Ⅱ),Pd(Ⅱ),Rh(Ⅲ),Ir(Ⅲ)等7种氯络酸时,HCl 浓度对分配系数的影响,进行了 TBP 与 TAPO 的对比实验;研究了萃取有机相的可见及红外光谱以及 H_2SO_4和 HClO_4对萃取的影响.认为萃取属于氢离子的水化溶剂化机理;推导了萃取能量变化公式;解释了实验获得的 MCl_6~(2-)>MCl_4~(2-)>MCl_6~(3-)规律及“最小电荷密度原理”,并根据从反应平衡式导出的分配系数近似式,解释了分配曲线中存在峰值的原因和 H_2SO_4助萃作用以及HClO_4抑萃作用的原因. Abstract：The influence of HCl concentration on the extraction distribution coefficients was examined when chloro-complex acids of Pt(Ⅳ),Pd(Ⅳ),Ir(Ⅳ),Pt(Ⅱ),Pd (Ⅱ),Rh(Ⅲ) and Ir(Ⅲ)extracted by TBP.The comparative tests between TBP and trialkyl phosphine oxide were also made.After the visible and ultrared spectra observations of the organic phases and the investigation of effect of H_2SO_4 and HClO_4 on extraction,it is reasonable to point out that the extraction is regarded as the mechanism of hydration and solvation of hydrogen ions.Thus, derivation of its energy change expression,explanation of the sequence of MCl_6~(2-)>MCl_4~(2-)>MCl_6~(3-) resulted experimentally and principle of the“least cherge density”are accomplished.According to the approximate formula of distribution coefficient derived from reaction equilibrium equation,the reasons of the peak occurred in the distribution curves and the auxiliary or inhibitory effect of H_2SO_4 or HClO_4 on extraction respectively were discussed. 收稿日期: 1982-02-18      服务 把本文推荐给朋友 加入引用管理器 E-mail Alert RSS 作者相关文章 陈景 杨正芬 崔宁 44.8K 链接本文: https://www.ams.org.cn/CN/      或      https://www.ams.org.cn/CN/Y1982/V18/I2/235 1 Berg,E.G;Senn,W.L.,Anal.Chim.Acta,19(1958) ,12． 2#12 3 泽菲洛夫,等主编,“萃取论文集”,(中译本)下册,1965,p.260,193． 4 Casey,A.T.;Davies,E.;Meek,T.L.;Wagner,E.S.,Solvent Extraction Chemistry,Proc.of the Int.Conf.Held at Gothenburg,Sweden,27 Aug.-1 Sep.1966,Ed.Dyrssen,D.,Liljenzin,J.O.,et al.,North-Holland,1967,p.327,310． 5 Diamond,R.M.;Tuck,D.G.,Prog.Inorg.Chem.,2(1960) ,109． 6 Meyers,D.A.;McDonald,R.L.,J.Am.Chem.Soc.,89(1967) ,486． 7 Hufen,T.H.;McDonald,R.L.,Solvent Extraction Research,Proc.on the Fifth Int.Conf.on Solvent Extraction Chemistry,Held in Jerusalem,Israel,Sept.1968,Ed.Kertes,A.S.;Marcus,Y.,Wiley-Interscience,New York,1968,p.83． 8 Widmer,H.M.,Solvent Extraction,Proc.of the Int.Solven Extraction Conf.,the Hague,April 1971,Soc.Chem.Ind.,London,1971,p.37． 9 Tocher,M.I.;Whitney,D.C.;Diamond,R.M.,J.Phys.Chem.,68(1964) ,368． 10 Kertes,A.S.,J.Inorg.Nucl.Chem.,14(1960) ,104． 11 Kulkarni,M.M.;Sathe,R.M.,India J.Chem.,4(1966) ,258． 12 Bockris,J.M.;Reddy,A.K.N.,Modern Electrochemistry,Plenum Press,Vol.1,1970,p.57． 13 Kertes,A.S.;Kertes,V.,J.Appl.Chem.,10(1960) ,287． 14 1976,p.85．@ No related articles found! Viewed Full text Abstract Cited   Shared      Discussed