FIELD: rare metal technology.
SUBSTANCE: method comprises precipitation of germanium in the form of scarcely dissoluble organic derivatives with mixture of hydroxycarboxylic acid and long-chain amine, the former, in particular, being tartaric, citric, or oxalic acid and the latter N-cetylpyridinium chloride or alkyldimethylbenzylammonium chloride at molar proportion of 2 to 6 per mole germanium. Method can be applied in processing of germanium-containing solutions and ammonia-tar liquors in by-product-coking industry.
EFFECT: increased degree of recovery and concentration of germanium, reduced consumption of reagents.
3 cl, 6 tbl, 5 ex
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