Method for recycling germanium from germanium-containing glass

• Main Author: TAN FATANG
• Format: Patent
• Language: Chinese; English
• Published: 05.03.2014
• Subjects: CHEMISTRY; CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION ORPROCESSING OF GOODS; FERROUS OR NON-FERROUS ALLOYS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; METALLURGY; PRETREATMENT OF RAW MATERIALS; PRODUCTION AND REFINING OF METALS; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS; TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINSTCLIMATE CHANGE; TREATMENT OF ALLOYS OR NON-FERROUS METALS

The invention discloses a method for recycling germanium from germanium-containing glass, which comprises the following steps: 1) pulverizing germanium-containing glass into germanium-containing glass powder, adding an alkali solution into the germanium-containing glass powder, heating to 120-300 DEG C, and keeping the temperature for 1-10 hours to obtain a water solution containing sodium silicate and sodium germanate; 2) adding an alkali metal salt into the water solution containing sodium silicate and sodium germanate obtained in the step 1), regulating the pH value to 6-9, aging, carrying out solid-liquid separation, drying the solid to obtain amorphous silicon dioxide, and recycling; 3) adding magnesium chloride into the solution obtained by solid-liquid separation in the step 2) to obtain a precipitate containing magnesium germanate; and 4) mixing the precipitate containing magnesium germanate with hydrochloric acid, carrying out chlorination distillation, condensing to collect germanium tetrachloride,