KINETIC STUDY ON THE EXTRACTION OF SCANDIUM(Ⅲ)IN SULFURIC ACID SOLUTION WITH PRIMARY AMINE N1923

Chinese Journal of Applied Chemistry ›› 1991, Vol. 0 ›› Issue (6): 57-60.

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KINETIC STUDY ON THE EXTRACTION OF SCANDIUM(Ⅲ)IN SULFURIC ACID SOLUTION WITH PRIMARY AMINE N1923

Tang Huimin, Liu Huizhong

Department of Chemistry, Tongji University, Shanghai 200092

Received:1990-04-02 Revised:1991-01-19 Published:1991-12-10 Online:1991-12-10

Abstract

Abstract: The extraction kinetics of Sc (Ⅲ) in sulfuric acid solution with N1923 in n-hexane hadbeen investigated using ascending single drop technique. The effects of the concentrations of Sc³⁺, H⁺, SO₄², N1923 and temperature on the extraction rate have been examined. Noinfluence was found from hydrogen ion concentration in the aqueous. solution. Under lowaqueous sulfate ion concentrations, the extraction rate equation can be expressed as: R=K[Sc³⁺][RNH_i⁺]_(i) [SO₄^2-]² The mechanism of extraction appears to be RNH_2(i) + H_(i)⁺—→RNH_3(i)⁺ fast Sc_(a)³⁺ + 2SO_4(a)^2- —→Sc(SO₄)_2(a)^- equilibrium Sc(SO₄)_2(i)^- + RNH_3(i)⁺ ——[RNH₃⁺][Sc(SO₄)₂^-]_(i) RDS.

Key words: scandium(Ⅲ), extraction kinetics, primary amine N1923

Tang Huimin, Liu Huizhong. KINETIC STUDY ON THE EXTRACTION OF SCANDIUM(Ⅲ)IN SULFURIC ACID SOLUTION WITH PRIMARY AMINE N1923[J]. Chinese Journal of Applied Chemistry, 1991, 0(6): 57-60.

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KINETIC STUDY ON THE EXTRACTION OF SCANDIUM(Ⅲ)IN SULFURIC ACID SOLUTION WITH PRIMARY AMINE N1923

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