Extraction Kinetics of Er(Ⅲ) with Bis(2,4,4-trimethylpentyl) Phosphinic Acid

Chinese Journal of Applied Chemistry ›› 1998, Vol. 0 ›› Issue (3): 43-46.

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Extraction Kinetics of Er(Ⅲ) with Bis(2,4,4-trimethylpentyl) Phosphinic Acid

Lu Jun, Ma Genxiang, Li Deqian, Ni Minshi

Open Laboratory of Rare Earth Chemistry and Physics, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022

Received:1997-10-17 Revised:1998-03-20 Published:1998-06-10 Online:1998-06-10

Abstract

Abstract: The extraction kinetics of Er³⁺ by bis(2,4,4-trimethylpentyl) phosphinic acid(HBTMPP) has been investigated using a novel constant interfacial area cell with laminar flow. The effects of concentration of Er(Ⅲ), pH, ion strength of aqueous phase and HBTMPP in organic phase on the extraction rate were studied. The influences of temperature, interfacial area on extraction kinetics were also discussed. The experimental results indicated that the extraction process might be governed by a mixed mechanism of diffusion and chemical reaction.

Key words: bis(trimethylpentyl)phosphinic acid, erbium ion, extraction kinetics, constant interfacial area cell

Lu Jun, Ma Genxiang, Li Deqian, Ni Minshi. Extraction Kinetics of Er(Ⅲ) with Bis(2,4,4-trimethylpentyl) Phosphinic Acid[J]. Chinese Journal of Applied Chemistry, 1998, 0(3): 43-46.

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Extraction Kinetics of Er(Ⅲ) with Bis(2,4,4-trimethylpentyl) Phosphinic Acid

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