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国内某含铀锗的褐煤,经灰化后,平均含铀1～2％、锗0.102％。用硫酸浸出后,浸出液(pH=1)含铀3～6克/升、锗120～210毫克/升,以及少量钼、钒、铁等杂质。关于从此类溶液中同时回收铀和锗的方法,目前国内外报道很少。对此溶液不论用二-(2-乙基己基)磷酸或三脂肪胺都能萃取铀,锗不被萃取,从而达到较好的铀锗分离效果。在萃取后,饱和有机相中的铀可以铀化学浓缩物形式回收。为了从萃余液中回收锗,曾用丹宁法制得比放射性强度符合国家规定
A domestic lignite containing uranium and germanium, after ashing, contains an average of 1 to 2% of uranium and 0.102% of germanium. After leaching with sulfuric acid, the leachate (pH = 1) contains 3 to 6 g / l of uranium, 120 to 210 mg / l of germanium, and a small amount of impurities such as molybdenum, vanadium and iron. At present, few reports have been reported on the simultaneous recovery of uranium and germanium from such solutions. For this solution, uranium can be extracted from di- (2-ethylhexyl) phosphoric acid or tris-fatty amine, germanium is not extracted, so as to achieve a better uranium-germanium separation effect. After extraction, the uranium in the saturated organic phase can be recovered as a uranium chemical concentrate. In order to recover germanium from the raffinate, it has been prepared by the tannin method in accordance with the state regulations