• 作者： Horng, Jiin-Shiung; Chuang, Wen-Shou; Hoh, Ying-Chu
• 中文摘要： 本文利用垂滴法測定釩--Aliquat 336萃取系統在不同條件下(稀釋劑之影響、萃取劑與進料濃度之影響等)之界面張力。由界面張力與濃度關係配合Marangoni 效應, 吾人可研判該系統宜用有機相或水相當連續相對於萃取操作較合適。該系統的界面張力 (.delta.)與分配係數 (D)可用實驗式,.delta.=D/sup n/, 來描述之, 其中n表示實驗常數。當萃取劑濃度固定但進料濃度不同時, n值等於-4.25; 反之, 當進料濃度固定但萃取劑濃度不同時, n值等於-4.5。Aliquat 336分子之界面活性甚強, 而液一液界面被吸附的分子可用Gibbs 吸附公式來描述。萃取與反萃取時, 由Gibbs 公式計算得之Aliquat 336 在界面的分子面積(A/sub 0/)分別為 158.ANG./sup 2//molecule與 36.ANG ./sup 2//molecule。
• 英文摘要： The pendant drop method was used to measure the interfacial tension for the extraction of vanadium in basic medium by Aliquat 336 at various conditions, such as diluent effect, variation of extractants and aqueous feed concentrations, etc. Marangoni effect can interpret these interfacial phenomena. Based on the interfacial tension data, one may qualitatively predict which phase will be continuous or dispersed. The relationship between the interfacial tension (.delta.) and distribution coefficient(D) may be described satisfactorily by an empirical equation, .delta..inf.D/sup n/, where n is an empirical constant and determined to be-4,25 and 4.5 for various feed and extractant concentrations, respectively. The Aliquat 336 molecules being highly interfacial active were adsorbed at liquid-liquid interface and could be characterized by the Gibbs equation. The interfacial molecular areas (A/sub 0/) of Aliquat 336 for extraction and stripping were calculated as 158 . ANG./sup 2//molecule and 36 .ANG./sup 2//molecule, respectively.
• 中文關鍵字： 界面張力; 萃取和反萃取; 分佈係數
• 英文關鍵字： Interfacial Tension; Extraction And Stripping; Distribution Coefficient