Extraction Behavior of Palladium(II) with Chelate Ligands into Supercritical COィイD22ィエD2

超临界 COD22D2 中螯合配体对钯 (II) 的萃取行为

基本信息

批准号：
09440250
负责人：
OHASHI Kousaburo
金额：
$ 6.46万
依托单位：
IBARAKI UNIVERSITY
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (B)
财政年份：
1997
资助国家：
日本
起止时间：
1997 至 1999
项目状态：
已结题

项目摘要

The distribution behavior of HMOィイD26ィエD2Q between supercritical (SF) COィイD22ィエD2 and water and the extraction behavior of Ga(III) and Pd(II) with 2-methyl-8-quinolinol derivatives from an acidic solution into SF COィイD22ィエD2 were investigated. Furthermore, the pH of an acidic solution contacting with SF COィイD22ィエD2 was evaluated spectrophotometrically.Below pH 3, the pH change of the aqueous solution contacting with SF COィイD22ィエD2 is negligibly small, but above pH 3, the pH of the aqueous phase was levelled to about 3.The distribution constant (KィイD2DィエD2) of 2-methyl-5-hexyloxymethyl-8-quinolinol (HMOィイD26ィエD2Q) between SF COィイD22ィエD2 and water increased with an increase in the SF COィイD22ィエD2 pressure. The KィイD2DィエD2 value at 45゜C and 20.4 MPa was about one tenth of the KィイD2DィエD2 value for heptane - water system.Ga(III) was extracted with HMOィイD26ィエD2Q into SFCOィイD22ィエD2 as Ga(OH)(MOィイD26ィエD2Q)ィイD22ィエD2. The extractability increases with an increment of the SF COィイD22ィエD2 pressure. Ga(III) was completely separated from Al(II) with HMOィイD26ィエD2Q at 45゜C and 10 MPa.The extractability of Pd(II) with HMQ from a weakly acidic solution into SF COィイD22ィエD2 was remarkably affected by the ClィイD1-ィエD1 and HィイD1+ィエD1 concentrations. Pd(II) should be extracted with HMQ as Pd(MQ)ィイD22ィエD2 from a weakly acidic solution. On the other hand, the Pd(II) complex extracted from the higher HCl concentration was HィイD22ィエD2PdClィイD24ィエD2.The proposed method can be potential technique for the selective separation of metals such as Pd(II).

研究了HMOI D26E D2Q在超临界（SF）COI D22E D2和水之间的分布行为，以及从SF COI D22E D2中酸性溶液中使用2-甲基-8-喹啉衍生物的GA（III）和PD（III）和PD（II）的提取行为。此外，分光光度计评估了与SF COI D22E D2接触的酸性溶液的pH值。BELOWpH 3，与SF COI D22E D2接触的水溶液的pH变化忽略很小，但是在pH 3上，pH 3，pH 3，pH 3，水平的pH值为3.大约3。 SF COI D22E D2之间的2-甲基-5-己糖甲基-8- Quinolinol（HMOI D26E D2Q）随着SF COI D22E D2压力的增加而增加。在45°C和20.4 MPa处的KII D2DIE D2值约为hMOI D26D2Q的K -D2DIE D2值的十分之一，将HMOI D26D2Q提取到SFCOI D22d2中，为GA（OH）（OH）（MOI D26D22Q）I D22Q）I D22E。可萃取性随SF COI D22E D2压力的增量而增加。 GA（III）在45°C和10 MPa的HMOI D26D2Q和10 MPa中与Al（II）完全分离。PD（II）用弱酸性溶液中的pd（ii）可萃取性能在SF COII D22E D2中受到CL D1-E D1-E D1 D1 D1 D1 D1 D1和H2E D1+E D1浓度的显着影响。应从弱酸性溶液中以HMQ作为PD（MQ）D22 D2提取PD（II）。另一方面，从较高的HCl浓度中提取的PD（II）复合物为H2E D2PDCL D24E D2。所提出的方法可以是选择性分离金属（例如PD（II））的潜在技术。