Method for producing germanium dioxide by utilizing germanium-containing wastes

Abstract

The invention provides a method for producing germanium dioxide by utilizing germanium-containing wastes. The method is characterized by comprising the following steps: directly adding the germanium wastes into a concentrated hydrochloric acid containing ferric trichloride; using chlorine as a shielding gas and adopting a rectifying column for distilling and purifying germanium tetrachloride; preparing germanium dioxide by performing totally closed hydrolysis reaction on the purified germanium tetrachloride; washing the hydrolysate and drying, thereby acquiring dry germanium dioxide; and adding the germanium wastes into a return fluid after completing distillation, thereby continuously producing. The germanium tetrachloride can be continuously produced in the manner of adding the germanium wastes into the concentrated hydrochloric acid containing ferric trichloride, and then adding chlorine for oxidizing, distilling and preparing germanium tetrachloride and adding the germanium wastes after completing the distillation; the usage of acid and hydrogen peroxide can be saved; the distilling return fluid can be repeatedly reused; and no distilling waste acid is generated.

Description

technical field [0001] The invention relates to the technical fields of chemistry and metallurgy, in particular to a method for producing germanium dioxide by utilizing waste materials containing germanium. Background technique [0002] The germanium content in germanium waste is 60-99%. In the prior art, hydrogen peroxide is used to oxidize and then distilled. After the hydrogen peroxide is evaporated to dryness, ferric chloride is added to re-oxidize, and hydrochloric acid is added to distill to produce germanium tetrachloride, and then through a fully enclosed The hydrolysis reaction produces germanium dioxide. Such a method cannot recycle hydrogen peroxide and hydrochloric acid, and a large amount of hydrogen peroxide and hydrochloric acid will be wasted. Contents of the invention [0003] In order to solve the above problems, the present invention provides a method for producing germanium dioxide by using germanium-containing waste materials, by adding germanium waste...

AI Technical Summary

Problems solved by technology

[0002] The germanium content in germanium waste is 60-99%. In the prior art, hydrogen peroxide is often used to oxidize and then distilled. After the hydrogen peroxide is evaporated to dryness, ferric trichloride is added to re-oxidize, and hydrochloric acid is added to distill to produce germanium tetrachloride, which is then fully enclosed. The hydrolysis reaction produces germanium dioxide. This method cannot recycle hydrogen peroxide and hydrochloric acid, and will waste a lot of hydrogen peroxide and hydrochloric acid.