In this paper the mass transfer behaviors of Fe(Ⅲ), Co(Ⅱ) and Ni(Ⅱ) with Cyanex302(bis(2,4,4- trimethylpentyl)monothiophosphinic acid) from sulfate medium by using hollow fiber membrane in counter-currently circula...In this paper the mass transfer behaviors of Fe(Ⅲ), Co(Ⅱ) and Ni(Ⅱ) with Cyanex302(bis(2,4,4- trimethylpentyl)monothiophosphinic acid) from sulfate medium by using hollow fiber membrane in counter-currently circulating operation were studied. The effect of acidity in aqueous solution and the extractant concentration on the mass transfer coefficient (Kw) was discussed. The reaction mechanism of membrane extraction was considered as a false one series reaCtion and the rate controlling step was membrane resistance. When the value of Kw arrived at 1.0 × 10-6 m/s, △pH:CoFe equaled tO 6.225, and △pH:NiFe was bigger than △p HCoFe.展开更多
Anna Grzeszczyk和Magdalena Regel—Rosocka研究了用丁基膦酸二丁酯（DBBP）溶液从盐酸溶液中萃取Zn（Ⅱ），Fe（Ⅱ）和Fe（Ⅲ）。DBBP仅稍微萃取Fe（Ⅱ）。比较了DBBP与磷酸三丁酯（TBP）萃取锌的等温线。结果表明，DBBP的萃取率高于...Anna Grzeszczyk和Magdalena Regel—Rosocka研究了用丁基膦酸二丁酯（DBBP）溶液从盐酸溶液中萃取Zn（Ⅱ），Fe（Ⅱ）和Fe（Ⅲ）。DBBP仅稍微萃取Fe（Ⅱ）。比较了DBBP与磷酸三丁酯（TBP）萃取锌的等温线。结果表明，DBBP的萃取率高于磷酸三丁酯的萃取率。由于高Cl-和HCl浓度下中性氯化配合物的存在，Fe（Ⅲ）可有效转移，因此，从含Fe（Ⅲ）的氯化物溶液中用DBBP选择性分离Zn（Ⅱ）是不可能的。展开更多
基金Supported by the National Natural Science Foundahon of China(No. 29771028, No. 29801004) and State Key Project of Fundamental
文摘In this paper the mass transfer behaviors of Fe(Ⅲ), Co(Ⅱ) and Ni(Ⅱ) with Cyanex302(bis(2,4,4- trimethylpentyl)monothiophosphinic acid) from sulfate medium by using hollow fiber membrane in counter-currently circulating operation were studied. The effect of acidity in aqueous solution and the extractant concentration on the mass transfer coefficient (Kw) was discussed. The reaction mechanism of membrane extraction was considered as a false one series reaCtion and the rate controlling step was membrane resistance. When the value of Kw arrived at 1.0 × 10-6 m/s, △pH:CoFe equaled tO 6.225, and △pH:NiFe was bigger than △p HCoFe.
