SU1168510A1 - Method of extracting germanium from weak solutions - Google Patents

Abstract

1. METHOD OF GERMANY EXTRACTION FROM POOR SOLUTIONS by precipitation to obtain germanium concentrate, characterized in that, in order to accelerate the process, extraction is carried out by electrochemical treatment of the initial germanium containing solution with a soluble anode at pH 5-8.5 and the feed rate of solution 1- 5 l / h per 1 dm anode. 2. The method according to claim 1, of which is carried out with the fact that the process is conducted with an iron or aluminum anode.

Description

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The invention relates to chemical technology of scattered elements, namely, German technology, and is intended to extract germanium from poor solutions to produce concentrates. The aim of the invention is to accelerate the process. Example 1. To 1000 ml of a solution, 1 g of sodium sulfate is added and the NaOH is adjusted to pH 7. The resulting solution is passed through a 50 cm electronic cell containing two plane-parallel aluminum electrodes. The distance between the electrodes is 10 mm. The solution flow rate is 15 ml / min (3.5 L / h per 1 dm of anode). Anode area 0.25 dm. Current density 0.75 A / dm. The voltage is 3.1 V. The resulting suspension is filtered. The precipitate is dried at constant weight. The concentration of germanium is determined in the filtrate and the precipitate. The residual concentration of germanium in the solution is 0.11 mg / l (permissible concentration of germanium in the discharge water is 2 mg / l-cm). Germanium deposition degree is 99.5%, concentrate weight is 152 mg. The concentration of germanium in the concentrate is 39.1%. 02 Example 2. An example is carried out analogously to example 1. A solution volume of 3000 ml. Germanium precipitated from solution. Additionally, the electrolyte is not introduced, the pH is not adjusted. Electrodes from iron (steel Art. 3). The flow rate of the solution is 4 ml / min (1 l / h per 1 dm of the anode). The current density is 0.75 A / dm, the voltage is 1 B. The residual concentration of germanium in the filtrate is 0.1 mg / l. Germanium deposition degree is 98.2%. Concentrate weight 76 mg. The content of german11 in the concentrate is 21.2%., Example 3. The example is carried out analogously to example 1. A solution volume of 200 ml. Germanium precipitated from solution. Electrodes from iron (steel Art. 3). The flow rate of the solution is 4 ml / min (1 l / h per 1 dm of the anode), pH-8.5. The current density is 0.5 A / dm, the voltage is 3.7 V. The residual concentration of germanium in the filtrate is 2.0 mg / l. Germanium deposition rate is 99.9%. Concentrate weight 520 mg. The concentration of germanium in the concentrate is 41.7%. Technical and economic effect of the proposed method is to accelerate the process while simultaneously increasing the concentration of germanium in the target product by 4-200 times

Claims (2)

1. METHOD FOR REMOVING GERMANY FROM POOR SOLUTIONS by precipitation to obtain a germanium concentrate, characterized in that, in order to accelerate the process, the extraction is carried out by electrochemical treatment of the initial germanium-containing solution with a soluble anode at pH = 5-8.5 and a solution feed rate of 1-5 l / h at 1 dm ^{2 of the} anode. 2. The method of pop. ^ characterized in that the process is conducted with an iron or aluminum anode. >