引用本文:
马恒励, 谢继发, 秦秀清, 刘长几, 袁承业. 1-辛基壬胺从硫酸溶液中萃取铁(Ⅲ)的性能和机理[J]. 应用化学,
1988, 5(2): 18-22.
Citation: Ma Hengli, Xie Jifa, Qin Xiuqing, Liu Changji, Yuan Chengye. STUDY ON THE BEHAVIOUR AND MECHANISM OF IRON(Ⅲ) EXTRACTION FROM AQUEOUS SOLUTION BY Ⅰ-OCTYLNONYLAMINE[J]. Chinese Journal of Applied Chemistry, 1988, 5(2): 18-22.
Citation: Ma Hengli, Xie Jifa, Qin Xiuqing, Liu Changji, Yuan Chengye. STUDY ON THE BEHAVIOUR AND MECHANISM OF IRON(Ⅲ) EXTRACTION FROM AQUEOUS SOLUTION BY Ⅰ-OCTYLNONYLAMINE[J]. Chinese Journal of Applied Chemistry, 1988, 5(2): 18-22.
1-辛基壬胺从硫酸溶液中萃取铁(Ⅲ)的性能和机理
English
STUDY ON THE BEHAVIOUR AND MECHANISM OF IRON(Ⅲ) EXTRACTION FROM AQUEOUS SOLUTION BY Ⅰ-OCTYLNONYLAMINE
Abstract:
The characteristic behaviour and mechanism of extraction of iron (Ⅲ) by 1-oetylnonylamine from aqueous sulfate medium were investigated, The extraction ability of this primary amine bearing secondary alkyl group was enhanced with increasing pH of the aqueous solu- tion. The extraction reaction was proved to be an endothermic process with AH value of 30.67 kJ/mol. K and 44.77 kJ/mol. K at pH 1.0 and 2.0 respectively. The extracted species are usually composed of a mixture of complexes depending on the degree of association of amine salts. The composition of the complex formed by successively extraction at pH 2.3 was estimated as (C17H35NH3)2SO4Fe(OH)SO4 which was evidenced by elemental analysis and Uv spectrometry. Molecular weight measurement indicated that this complex existed in highly intermolecular associated form in benzene solution.
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Key words:
- Complexation extraction
- / Iron
- / Organic amine
- / Mechanism
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