SEPARATION OF W AND Mo BY CL-P507 EXTRACTION RESIN Ⅱ. ADSORPTION AND SEPARATION MECHANISM OF W AND Mo

Chinese Journal of Applied Chemistry ›› 1992, Vol. 0 ›› Issue (1): 42-46.

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SEPARATION OF W AND Mo BY CL-P507 EXTRACTION RESIN Ⅱ. ADSORPTION AND SEPARATION MECHANISM OF W AND Mo

Liu jian, Wang Xiushan, Yang Zichao, Yan Jumei

Department of Chemistry, Shaanxi Teacher's University, Xi'an 710062

Received:1990-11-05 Revised:1991-03-30 Published:1992-02-10 Online:1992-02-10

Abstract

Abstract: The adsorption and separation mechanism of Mo and W by Cl-P507 extraction resin have been investigated. The adsorption reaction enthalpies of the resin at 25 to 58℃ were determined as (ΔH=19.7kJ/mol) (for Mo), and (ΔH=4.18kJ/mol) (for W). The composition of extracted complex is MoO₂L₂ (HL=P507) as determined by the saturation and slope method. Based on the UV spectra and IR speetra, the adsorption mechanism for Mo is proved to be a cation exchange reaction: MoO₂²⁺+2HL=MoO₂L₂+2H⁺. The co-adsorption of W is a hydrogen bond association process.

Key words: tungstun, molybdenum, mechanism, mono (ethyl hexyl)-ethyl hexyl phosphonate

Liu jian, Wang Xiushan, Yang Zichao, Yan Jumei. SEPARATION OF W AND Mo BY CL-P507 EXTRACTION RESIN Ⅱ. ADSORPTION AND SEPARATION MECHANISM OF W AND Mo[J]. Chinese Journal of Applied Chemistry, 1992, 0(1): 42-46.

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SEPARATION OF W AND Mo BY CL-P507 EXTRACTION RESIN Ⅱ. ADSORPTION AND SEPARATION MECHANISM OF W AND Mo

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