SCI和EI收录∣中国化工学会会刊

Chin.J.Chem.Eng. ›› 2013, Vol. 21 ›› Issue (11): 1313-1318.DOI: 10.1016/S1004-9541(13)60628-X

• RESEARCH NOTES • Previous Articles    

Nano-baskets of Calix[4]-1,3-crown in Emulsion Membranes for Selective Extraction of Alkali Metal Cations

Bahram Mokhtari, Kobra Pourabdollah   

  1. Department of Chemical Engineering, Shahreza Branch, Islamic Azad University, Shahreza, Iran
  • Received:2012-07-16 Revised:2012-11-19 Online:2013-11-26 Published:2013-11-28
  • Contact: Kobra Pourabdollah

Nano-baskets of Calix[4]-1,3-crown in Emulsion Membranes for Selective Extraction of Alkali Metal Cations

Bahram Mokhtari, Kobra Pourabdollah   

  1. Department of Chemical Engineering, Shahreza Branch, Islamic Azad University, Shahreza, Iran
  • 通讯作者: Kobra Pourabdollah

Abstract: Nano-assisted inclusion separation of alkali metals from basic solutions was reported by inclusion-facilitated emulsion liquid membrane process. The novelty of this study is application of nano-baskets of calixcrown in the selective and efficient separation of alkali metals as both the carrier and the surfactant. For this aim, four derivatives of diacid calix[4]-1,3-crowns-4,5 were synthesized, and their inclusion-extraction parameters were optimized including the calixcrown scaffold (4.4%, by mass) as the carrier/demulsifier, the commercial kerosene as diluent in membrane, sulphonic acid (0.2 mol·L-1) and ammonium carbonate (0.4 mol·L-1) as the strip and the feed phases, the phase and the treat ratios of 0.8 and 0.3, mixing speed (300 r·min-1), and initial solute concentration (100 mg·L-1). The selectivity of membrane over more than ten interfering cations was examined and the results reveled that under the optimized operating condition, the degree of inclusion-extraction of alkali metals was as high as 98%-99%.

Key words: nano-basket, inclusion, calixcrown, emulsion liquid membrane, alkali metals

摘要: Nano-assisted inclusion separation of alkali metals from basic solutions was reported by inclusion-facilitated emulsion liquid membrane process. The novelty of this study is application of nano-baskets of calixcrown in the selective and efficient separation of alkali metals as both the carrier and the surfactant. For this aim, four derivatives of diacid calix[4]-1,3-crowns-4,5 were synthesized, and their inclusion-extraction parameters were optimized including the calixcrown scaffold (4.4%, by mass) as the carrier/demulsifier, the commercial kerosene as diluent in membrane, sulphonic acid (0.2 mol·L-1) and ammonium carbonate (0.4 mol·L-1) as the strip and the feed phases, the phase and the treat ratios of 0.8 and 0.3, mixing speed (300 r·min-1), and initial solute concentration (100 mg·L-1). The selectivity of membrane over more than ten interfering cations was examined and the results reveled that under the optimized operating condition, the degree of inclusion-extraction of alkali metals was as high as 98%-99%.

关键词: nano-basket, inclusion, calixcrown, emulsion liquid membrane, alkali metals