Method for extracting germanium from germanium-containing smoke dust
A germanium fume and extraction technology, applied in the field of chemical metallurgy, can solve the problems of difficult operation, low production efficiency, high processing cost, and achieve the effects of strong operability, stable recovery rate and cost reduction
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Embodiment 1
[0031] In this example, the stationary phase and separation column for filtration are mainly prepared. The stationary phase is prepared by the following method: first, under the condition of 80°C, use 1 mol of hydrochloric acid to acidify the silica gel powder with a particle size of 1 μm, and the treatment time is 12 hours. After cooling to room temperature, filter, wash and Dry the pretreated silica gel powder; then, add the pretreated silica gel powder into a vacuum reactor filled with anhydrous toluene, and then add γ-aminopropyltriethoxysilane dropwise at 60°C , stirred and reacted for 12 h; then added tri-n-octylamine, stirred and reacted for 8 hours; then added methacrylic acid, stirred and reacted for 6 hours; then filtered, washed and dried to obtain the stationary phase; wherein, the pretreatment The mass ratio of silica gel powder, γ-aminopropyltriethoxysilane, tri-n-octylamine and methacrylic acid is 100:10:15:3.
[0032] The separation column used is a cylindrica...
Embodiment 2
[0034] In this embodiment, the content of germanium in the germanium-containing fume is 9.2wt%. Add HCl containing 200g / L, 15g / L H 2 o 2and an acid solution with the balance of water; then, add 500 g of the germanium-containing dust under stirring conditions, and the mass ratio of the acid solution to the germanium-containing dust is 3:1; then pass through chlorine gas at a temperature of 60°C for leaching Until the introduced chlorine no longer absorbs; then the temperature is raised to 90°C, and germanium tetrachloride is distilled to obtain a gas containing germanium tetrachloride. The gas containing germanium tetrachloride was cooled to room temperature to obtain a crude germanium tetrachloride solution, which was extracted and filtered. For the first extraction, 10 mol / L hydrochloric acid containing saturated chlorine was used, the extraction temperature was controlled at 0-10 °C by using a brine bath, and the extraction time was 60 min. The extracted germanium tetrach...
Embodiment 3
[0036] In this embodiment, the content of germanium in germanium-containing fumes is 12.3wt%. Add HCl containing 200g / L, 20g / L H 2 o 2 and an acid solution with the balance of water; then, add 500 g of the germanium-containing dust under stirring conditions, and the mass ratio of the acid solution to the germanium-containing dust is 10:1; then pass through chlorine gas at a temperature of 60°C for leaching Until the introduced chlorine no longer absorbs; then the temperature is raised to 85°C, and germanium tetrachloride is distilled to obtain a gas containing germanium tetrachloride. The gas containing germanium tetrachloride was cooled to room temperature to obtain a crude germanium tetrachloride solution, which was extracted and filtered. For the first extraction, 10 mol / L hydrochloric acid containing saturated chlorine was used, the extraction temperature was controlled at 0-10 °C by using a brine bath, and the extraction time was 60 min. The extracted germanium tetrach...
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