D2EHPA로부터 코발트 脫去特性에 관한 硏究
A Study on the Stripping Characteristic of Cobalt from D2EHPA
1
조회
0
다운로드
0
인용
0
참고문헌
키워드
초록
D2EHPA에 추출된 코발트의 탈거시 탈거특성과 탈거등온곡선에 대해 조사하였다. 실험결과 D2EHPA에 추출된 코발트의 탈거반응은 반응시작 후 10분 만에 평형에 도달하고 있다. 그리고 코발트의 탈거액으로는 질산이 효과적이었으며, 코발트의 탈거율은 질산농도와 온도가 증가할수록 증가하였다. 한편 코발트 농도가 10g/L인 유기상을 질산 3.0N로 45℃에서 탈거할 경우 상비 O/A=6에서 4단 탈거하면 수상중 코발트 농도는 최대 60g/L가 되고 유기상중에는 코발트가 20ppm 이하로 잔류하여 99.8% 이상 탈거되고 있다.
Abstract
The stripping characteristics and stripping isotherm for the stripping of cobalt from D2EHPA (Di-2-Ethylhexyl Phosphoric Acid) were studied. The results showed that the stripping of cobalt from D2EHPA reached the equilibrium state after ten minutes. The nitric acid as a stripping solution was more effective than sulfuric acid or hydrochloric acid and the stripping efficiency of cobalt increased with increasing concentration of HNO3 and temperature. When the organic solution containing cobalt of 10g/L was treated by 3.0N HNO3 at 45℃ with four stages, more than 99.8% of cobalt was stripped at a phase ratio of O/A=6.
참고문헌 (9)
- "D2EHPA에 의한 코발트 용매추출에 관한 연구", 41(2), pp.154~159 (2004)
- "Purification of synthetic laterite leach solution by solvent extraction using D2EHPA", 56(3), pp.369~386 (2000)
- "Solvent extraction separation of cobalt with hexaacetatocalix(6)arene", 42(10), pp.1493~1496 (1995)
- "Recovery of cobalt from spent copper leach solution using continuous ion exchange", 8, pp.37~44 (1988)
- "Cobalt and zinc recovery from copper sulphate solution by solvent extraction", 16(12), pp.1371~1374 (2003)
- "Extraction of cobalt(II) from an ammonium nitrate- containing leach liquor by an ammonium salt of di(2- ethylhexyl)phosphoric acid", 16(10), pp.2 1013~1017 (2003)
- "Hydrometallurgical process for recovery of cobalt from zinc plant residue", 63, pp.225~234 (2002)
- "Hydrometallurgical process for recovery of metal values from spent nickel-metal hydride secondary batteries", 50(1), pp.61~75 (1998)
- "The synergistic extraction of nickel and cobalt with a mixture of di(2-ethylhexyl) phosphoric acid and 5-dodecylsalicylaldoxime", 61, pp.223~227 (2001)