Recovery and Reuse of Tannin from Tannin-germanium Slag

作者：Tao Lin · 年份：2012 · 被引用次数：4 · 研究领域：Extraction and Separation Processes、Bauxite Residue and Utilization、Metal Extraction and Bioleaching

The disposing of the tannin-germanium slag,which was obtained during tannin-germanium precipitation process,was studied.The separation of tannin and germanium can be achieved by successively slurrying the tannin-germanium slag,complexation with oxalic acid and adjusting the pH value of the suspension to 8-9 with 10 % aqueous sodium hydroxide.The germanium salt is removed by centrifugal separation,and the aqueous tannin solution can be reused to extract germanium.The result shows that recovery rate of tannin can reach 50 %.Using 28 times of tannin as much as germanium,the recovery rate of germanium can be 98 %.