Alamine336によるモリブデンおよびタングステンの抽出
1988 年 104 巻 1206 号 p. 537-541
詳細
1988 年 104 巻 1206 号 p. 537-541
Extraction of Mo and W from the single component solution and the binary solution and stripping of both metals with various aqueous solutions were investigated by using Alamine 336 as an extractant. On the basis of the extraction and stripping properties, separation methods of Mo from W were studied from the two main aspects. The one is the viewpoint that W could be selectively extracted under the aqueous condition of pH around 1, because the failure of separation of Mo from W is due to the formation of complex polynuclear ionic species between Mo and W. It is considered from-the solution chemistry of both metals that the complex polynuclear species are not almost formed in aqueous solution of pH below 1.
The other is the point of view that after simultaneous extraction of Mo and W, Mo would be selectively stripped from the organic phase with the aqueous solution containing complexing agents or W could be selectively crystallized as ammonium paratungstate from the organic phase with ammonia solution.
Though any attempts to separate Mo from W do not produce sufficient results at the present stage, the interesting extraction and stripping data of Mo and W are represented in the paper.
