Current time in Korea 13:46 Apr 16 (Tue) Year 2024 KCS KCS Publications
KCS Publications
My Journal  Log In  Register
HOME > Search > Browsing(JKCS) > Archives

Journal of the Korean Chemical Society (JKCS)

ISSN 1017-2548(Print)
ISSN 2234-8530(Online)
Volume 42, Number 1
JKCSEZ 42(1)
February 20, 1998 
 
Title
 Solvent Extraction and Flotation Techniques Using Metal-Dithizone complex (II). Rate Promoting Effect of Thiocyanate Ion as Auxiliary Ligand on Extraction of Cobalt(II) and Copper(II)

Dithizone 금속착물을 이용한 용매추출 및 부선기술 (제1보). 코발트 및 구리의 추출에서 보조리간드로서 티오시안산이온의 속도 증가 효과
Author
 Yoon-seok Choi, Hee-Seon Choi, Young-Sang Kim*

최윤석, 최희선, 김영상
Keywords
Abstract
 Co(Ⅱ) 와 Cu(Ⅱ)의 금속이온을 디티존의 클로로포름용액으로 추출할 때 보조 리간드로 티오시안산이온을 사용하여 금속착물의 분포비, 추출률 및 추출속도상수를 구하여 보조 리간드를 사용하지 않았을 경우와 비교하였다. 착물의 분포비는 보조 리간드가 없을 때보다 보조 리간드가 있을 때, Co(Ⅱ)는 염기성에서 3배 정도 Cu(Ⅱ)는 넓은 pH범위에서 2배 정도 더 크게 나타났고, 추출률은 보조 리간드가 존재하면 Co(Ⅱ)는 90에서 99%로, Cu(Ⅱ)는 95에서 99%로 증가하였다. 그리고 추출속도상수 k1은 Co(Ⅱ):1.2×105, k2: 1.34×1017 mol-1dm3s-1이였으며 Cu(Ⅱ)는k1과 k2가 각각1.1×108과 2.83×1010 mol-1dm3s-1이였다.

In this study, the extraction of Co(Ⅱ) and Cu(Ⅱ) into chloroform solution of dithizone, distribution ratios, extractabilities and extraction rate constants of the metal complexes were compared in each case with which thiocyanate ion was or not used as the auxiliary ligand. The use of the thiocyanate ion increased threefold the distribution ratio for Co(Ⅱ) complex in a basic solution and twofold for Cu(Ⅱ) complex in a wide pH range. And the extractability was also augmented from about 90 to 99% for Co(Ⅱ) and from 95 to 99% for Cu(Ⅱ) in a given period. The extraction rate constants were k1: 1.2×105, k2: 1.34×1017 mol-1dm3s-1 in case of Co(Ⅱ) and k1: 1.1×108, k2: 2.83×1010 mol-1dm3s-1 in case of Cu(Ⅱ) on the extraction of dithizonate complexes into chloroform solution.
Page
 36 - 41
Full Text
 PDF

How to access to the WOL for The Bulletin of the Korean Chemical Society ?

The Bulletin of the Korean Chemical Society will be co-published with Wiley-VCH from 2015 towards. The online version of the Journal will thus be available on Wiley Online Library, Wiley(-VCH)'s global online platform.

KCS members can get a free online access to the Bulletin of the Korean Chemical Society in WOL.

Close