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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. shu

STUDY ON THE BEHAVIOUR AND MECHANISM OF IRON(Ⅲ) EXTRACTION FROM AQUEOUS SOLUTION BY Ⅰ-OCTYLNONYLAMINE

1.
Shanghai Institute of Organic Chemistry, Academia Sinica

Received Date: 13 January 1987
Available Online: 8 July 1987

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.
- Complexation extraction,
- Iron,
- Organic amine,
- Mechanism
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