应用化学 ›› 1992, Vol. 0 ›› Issue (1): 42-46.

• 研究论文 • 上一篇    下一篇

萃淋树脂Cl-P507吸附、分离钨钼的研究Ⅱ.树脂吸附分离钨钼的机理

刘建, 王秀山, 杨子超, 阎居梅   

  1. 陕西师范大学化学系, 西安 710062
  • 收稿日期:1990-11-05 修回日期:1991-03-30 出版日期:1992-02-10 发布日期:1992-02-10

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   

  1. 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

摘要: 本文研究了萃淋树脂Cl-P507吸附分离钨钼的机理,测定了吸附过程的热焓值,表明树脂对钼的吸附为放热过程;确定了树脂吸附钼属阳离子交换过程,对钨的共吸附属氢键缔合机理,并确定了钼吸萃物的组成。

关键词: 钨, 钼, 萃淋树脂, 机理, 2-乙基己基膦酸单(2-乙基己基)酯

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