2,4- Heptadione 에 의한 Cu (Ⅱ) 의 용매추출특성 = Solvent Extraction of Cu (Ⅱ) by 2,4- Heptadione in Chloroform

국문 초록 (Abstract)

sodium amide에 의한 methylpropyl ketone과 ethyl acetate의 반응으로 2, 4-heptadione(이하 24HTD)을 합성하고, 클로로포름 용매하에 Cu(II)의 용매추출 실험으로부터 추출평형 및 추출속도 특성을 고찰하였다. 흡광도와 Cu(II)의 농도변화 측정으로부터 24HTD의 분배계수와 해리정수, 24HTD와 Cu 착화합물의 안정도 상수, 분배계수 및 총괄추출 평형정수 등을 구하고 추출기구를 구명하였다. 24HTD에 의한 Cu(II)의 추출 화학종은 1:2의 형태인 CuR_2였으며, 24HTD-클로로포름에 의한 Cu(II)의 총괄 초기 추출속도는 R_0= k(HR)( [Cu^(2+)]/[H^+])^(0.5)로 표시되었다.

다국어 초록 (Multilingual Abstract)

2,4-Heptadione(abbreviated to 24HTD) was synthesized from methylpropyl ketone and ethyl acetate with sodium amide, and the equilibrium and the kinetic characteristics of copper extraction by 24HTD-chloroform were investigated. Equilibrium constants such as the dissociation constant and the distribution coefficient of 24HTD and the stability constant of the 24HTD-Cu chelate were evaluated from the spectrophotometry, and the overall equilibrium constant of the extraction was also determined. The extracted species of the 24HTD-Cu chelate was found to be CuR_2 and the initial rate of the extraction of copper by 24HTD in chloroform was expressed by R_0=k[HR]([Cu^(2+)]/[H^+])^(0.5).