中华医学超声杂志

应用化学 ›› 2011, Vol. 28 ›› Issue (04): 483-485.DOI: 10.3724/SP.J.1095.2011.00433

• 研究简报 • 上一篇    下一篇

萃取Fe3+和氨水-乙醇反萃沉淀法制备α-Fe2O3

张凌云1*,管航敏1,黎汉生2,江可1   

  1. (1.合肥学院化学与材料工程系 合肥 230022;2.北京理工大学化工与环境学院 北京)
  • 收稿日期:2010-07-29 修回日期:2010-08-29 出版日期:2011-04-10 发布日期:2011-04-10
  • 通讯作者: 张凌云，讲师; Tel/Fax:0551-2158091; E-mail: lingyunf@126.com; 研究方向：工业催化剂制备及应用
  • 基金资助:
    国家自然科学基金(20506002)安徽省教育厅自然科学基金和青年教师基金(KJ2009B243Z，2007JQ1150 )资助项目

Extraction of Fe3+ by Bi-(2-ethylhexyl)phosphate and Preparation of α-Fe2O3 by Stripping Precipitation Method with Ammonia-alcohol

ZHANG Lingyun1*, GUAN Hangmin1, LI Hansheng2, JIANG Ke1   

  1. (1.Department of Chemistry and Materials Engineering,Hefei University,Hefei 230022；
    2.School of Chemical Engineering and the Environment,Beijing Institute of Technology,Beijing)
  • Received:2010-07-29 Revised:2010-08-29 Published:2011-04-10 Online:2011-04-10

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摘要：

以磷酸二异辛基酯(P204)为萃取剂，CCl4为溶剂，从Fe(NO3)2水溶液中萃取铁离子，以氨的乙醇溶液反萃含铁的有机相，通过优化控制相间传质过程，获得了Fe(OH)3前驱体，经煅烧后得α-Fe2O3粉体，采用TEM、FTIR、XRD等测试技术对α-Fe2O3进行表征。 研究表明，在油水相比为1∶1，水相c(Fe3+)=0.10 mol/L(pH=3.0)、油相P204为V(P204)∶V(CCl4)=1∶3、平衡时间为20 min，Fe3+萃取率达98.44%；反萃取溶液V(氨水)∶V(乙醇)=1∶7、陈化温度约10.0 ℃，制备纳米α-Fe2O3的煅烧温度为600 ℃较宜。

关键词: 萃取, 反萃沉淀法, 纳米 α-Fe2O3

Abstract:

Fe3+ was extracted from Fe(NO3)3 by liquid phase extraction using a mixture of bi-(2-ethylhexyl) phosphate (P204) and tetrachloride carbon. Fe(OH)3 powders were prepared through stripping precipitation method with ammoniaalcohol aqueous solution as a re-extractant and precipitator. α-Fe2O3 powders were obtained by decomposing Fe(OH)3 at an appropriate temperature and characterized by TEM, FTIR, and XRD. The results show that the P204 contents are in the oil phase, Fe3+ contents are in the water phase, and the reaction time has obvious influence on the extraction of Fe3+. Under the optimum conditions of phase volume ratio at 1∶1, c(Fe3+) at 0.10 mol/L(pH=3.0), volume ratio of P204 and CCl4 as 1∶3, and reaction time of 20 min, 98.44% of Fe3+ is extracted. α-Fe2O3 powders with a small size and uniformity are obtained at 600 ℃. The optimum aging temperature and concentration of ammonia aqueous are 10.0 ℃ and 1∶7, respectively.

Key words: Iron Removal, precipitation by stripping precipitation, nano α-Fe2O3

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