Separation of metals by a simultaneous extraction and back-extraction method with Teflon phase separator

使用聚四氟乙烯相分离器同时萃取和反萃取法分离金属

• 批准号: 05640691
• 负责人: WATANABE Kunihiro
• 金额: $ 1.22万
• 依托单位: SCIENCE UNIVERSITY OF TOKYO
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for General Scientific Research (C)
• 财政年份: 1993
• 资助国家: 日本
• 起止时间: 1993 至 1994
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-05640691/
• 关键词: Simultaneous extraction and back-extraction method; Teflon phase separator; PAN; Separation of Fe, Co and Ni; 連結抽出; テフロンフェイズセパレーター; 連続抽出装置; ピリジルアゾナフトール; 強アルカリ溶液; みかけの分配

A new method, which is similar to a liquid membrane method, was inve stigated for simultaneous extraction and back-extraction and back-extrac tion using two vessels with Teflon phase separators. The absorbance of metal complexes extracted was measured by a spectrophotometor with a flow cell. PAN [1- (2-pyridylazo) -2-naphthol] was used as a ionophore because of its high sensitivity. The condition for the separation and the determination of iron (II) , cobalt (II) and nickel (II) were examined under high speed stirring (2500rpm). After extraction of iron and cobalt complex to the chloroform phase, iron complex was back-extracted woth 6M HNO_3 solution immediately. The cobalt complex remained in the organic phase. Nickel-PAN was partially extracted at pH 4 after 40 min by a conventional extraction-procedure, which used a separatory funnel, in spite of the slow complex formation reaction.By the present method, the excess reagent (PAN) with iron complex was back-extracted into 6 M HNO_3 solution. The extraction rate for the nickel-PAN complex decreased with the extraction time.Consequently, the nickel-complex was not extracted at pH 4 into the chloroform by the present method.

研究了一种类似于液膜法的同时萃取、反萃取和反萃取的新方法。通过具有流动池的荧光光度计测量萃取的金属络合物的吸光度。PAN [1-（2-吡啶偶氮）-2-萘酚]因其高灵敏度而被用作离子载体。研究了在高速搅拌（2500 rpm）下分离测定铁（II）、钴（II）和镍（II）的条件。铁钴络合物被萃取到氯仿相中后，立即用6 M HNO_3溶液反萃。钴络合物保留在有机相中。在pH 4的条件下，用分液漏斗萃取40 min后，镍-PAN被部分萃取，过量的试剂PAN与铁络合后被6MHNO_3反萃取。镍-PAN络合物的萃取率随萃取时间的延长而降低，因此，在pH 4的氯仿中，镍-PAN络合物不能被萃取。

项目成果

渡辺邦洋: "同時正逆抽出法を利用したPANによるFe,Co,Niの分離" 分析化学. 43(印刷中、5月発行). (1994)

Kunihiro Watanabe：“使用同时正向和反向萃取通过 PAN 分离 Fe、Co 和 Ni”《分析化学》43（出版中，5 月出版）。

渡辺邦洋: "高速攪拌下でのAAによるV(V)及びFe(III)の連続抽出" 分析化学. 44(印刷中).

Kunihiro Watanabe：“在高速搅拌下通过 AA 连续萃取 V(V) 和 Fe(III)”《分析化学》44（出版中）。

渡辺邦洋: "同時正逆抽出法を利用したPANによるFe,Co,Niの分離" 分析化学. 43. 395-401 (1994)

Kunihiro Watanabe：“使用同时正向和反向萃取通过 PAN 分离 Fe、Co 和 Ni”分析化学 43. 395-401 (1994)。

Kunihiro Watanabe, Yoneichi Hirata: "Separation of iron, cobalt and nickel by a simuon and back-extraction method with 1- (2-pyridylazo) -2-naphthol" BUNSEKI KAGAKU. Vol 44. 395-401 (1994)

Kunihiro Watanabe、Yoneichi Hirata：“用 1-(2-吡啶基偶氮)-2-萘酚通过模拟和反萃取法分离铁、钴和镍”文石化学。

Kunihiro Watanabe, Masayuki Usuki and Masayuki Itagaki: "Continuous extraction of vanadium (V) and iron (III) with acethylacetone unde high speed stirring" BUNSEKI KAGAKU. Vol 44 (in press).

Kunihiro Watanabe、Masayuki Usuki 和 Masayuki Itagaki：“在高速搅拌下用乙酰丙酮连续萃取钒 (V) 和铁 (III)”BUNSEKI KAGAKU。