中华医学超声杂志

应用化学 ›› 2011, Vol. 28 ›› Issue (07): 804-808.DOI: 10.3724/SP.J.1095.2011.00529

• 研究论文 • 上一篇    下一篇

粉煤灰硫酸浸出液中钛和铁的萃取分离

薛茹君   

  1. (安徽理工大学化工学院 淮南 232001)
  • 收稿日期:2010-09-13 修回日期:2010-10-26 出版日期:2011-07-10 发布日期:2011-07-10
  • 通讯作者: 薛茹君，教授; Tel:0554-6631981; Fax:0554-6668900; E-mail:klzhu@aust.edu.cn; 研究方向：矿物化学加工、纳米材料
  • 基金资助:
    安徽省教育厅重大科研项目（ZD200903）资助项目

Extraction and Separation of Titanium and Iron with Sulfuric Acid Leaching of Fly Ash

XUE Rujun   

  1. (School of Chemical Engineering and Technology,Anhui University of
    Science and Technology,Huainan 232001)
  • Received:2010-09-13 Revised:2010-10-26 Published:2011-07-10 Online:2011-07-10

PDF

2503

被引次数

8 | 1

摘要：

将粉煤灰的硫酸浸出液，用氨水调节pH值后，用三正辛基氧膦-煤油、磷酸二异辛酯-煤油萃取分离溶液中的Ti4+和Fe3+。 考察了萃取剂、水相阳离子浓度、pH值及萃取温度和时间等实验条件对萃取率的影响；讨论了萃取剂再生条件对提取率及分离产物纯度的影响。 用XRD表征了反萃取煅烧产物的物相组成，用X射线荧光分析测定了煅烧产物TiO2和Fe2O3的纯度。 分析结果表明，钛的萃取率达到97%，提取率＞92%；铁的萃取率达到97%，提取率达到96%；TiO2 和Fe2O3的纯度分别为98%和97%，均可以用作涂料的颜料。

关键词: 粉煤灰, Ti4+, 三正辛基氧膦, 磷酸二异辛酯, 萃取

Abstract:

By adjusting the pH of the H2SO4 leaching liquor of fly ash, Ti4+ and Fe3+ were extract-separated with trioctylphosphineoxide(TOPO)kerosene and di(2-ethylhexyl) phosphoric acid（P204）-kerosene, respectively. Effects of the extractants, the concentration of the cations, pH of the aqueous solution, extracting temperature, and extracting time on the extracting efficiency were investigated. Effect of the recycle conditions of the loaded extractants on the recovery yield and the purity of recovered products were discussed as well. The phase of the precursor and its calcined products were characterized by X-ray diffraction(XRD). The purity of the TiO2 and Fe2O3 were determined by X-ray fluorescence（XRF）. The analysis results show that the extracting-titanium efficiency and the extracting-iron efficiency were as high as 97%. The extraction yields of ferric oxide and titanium dioxide are 96% and greater than 92%, respectively. The purities of TiO2 and Fe2O3 are 98% and 97%, respectively, which can be used as a white pigment or iron oxide red pigment in the production of paints, respectively.

Key words: fly ash, Ti4+, trioctylphosphineoxide, di(2-ethylhexyl)phosphoric acid, Iron Removal

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