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Citation: Jiang Ciqing, Liu Songyu. STUDY ON THE EXTRACTION OF IRON(Ⅲ), COBALT(Ⅱ) AND NICKEL(Ⅱ)WITH 1, 9-BIS(1'-PHENYL-3'-METHYL-5'-OXOPYRAZOLE-4'-YL)-1, 9-NONANEDIONE[J]. Chinese Journal of Applied Chemistry, ;1989, 6(4): 13-17. shu

STUDY ON THE EXTRACTION OF IRON(Ⅲ), COBALT(Ⅱ) AND NICKEL(Ⅱ)WITH 1, 9-BIS(1'-PHENYL-3'-METHYL-5'-OXOPYRAZOLE-4'-YL)-1, 9-NONANEDIONE

Jiang Ciqing ,
Liu Songyu

1.
Department of Chemistry, Yunnan University, Kunming

Received Date: 15 October 1988
Available Online: 23 December 1988

The extraction behavior of iron(Ⅲ), cobalt(Ⅱ) and nickel(Ⅱ) by 1,9-bis (1'-phenyl-3'-methyl-5'-oxopyrazole-4'-yl)-1, 9-nonanedione (abbreviated as H₂ A) in chloroform rom sodium nitrate and HAc-NaAc buffer medium has been studied. Their pH_1/2 values were found to be 2.43, 5.08 and 4.51,respectively. Therefore, it is possible to separate iron from cobalt and nickel by extraction with H₂A. The compositions of the extracted complexes were determined by the slope method as Fe₂A₃; CoA and NiA respectively. Their extraction equlibrium constants (lgK_ex) were calculated to be 2.44±0.11, -7.33±0.18, -6.63±0.11 respectively. The solid ferric complex synthesised has been characterized by elemental,thermal analyses and IR measurement.
- Extraction separation,
- Chelating extractant,
- Iron,
- Cobalt,
- Nickel
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