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Method for receiving germanium in germanium containing liquid waste

A technology of waste liquid and alkaline solution, applied in the field of hydrometallurgy, can solve the problems of expensive tannin, high production cost, waste of germanium resources, etc., and achieve the effect of ensuring healthy and sustainable development

Inactive Publication Date: 2018-03-23
苏州朴拙材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The content of germanium in the alkaline solution obtained by absorbing and treating a large amount of acid gas produced during the chlorination and distillation of germanium is 7 to 10 g / L. The conventional treatment method is to add sulfuric acid to the solution to adjust the pH value of the solution to 1 to 2, and then Add tannin to precipitate germanium, filter and calcinate tannin germanium to obtain germanium concentrate. At present, due to the high price of tannin, the production cost is high. During the calcination process, a part of germanium volatilizes in the air, which makes the recovery rate of germanium low and causes Air pollution and other issues
[0005] In the process of preparing optical fiber rods, the excess germanium tetrachloride gas and silicon tetrachloride gas are treated with sodium hydroxide, and the germanium content in the resulting solution is 20-30mg / L. Due to the strong alkalinity of the solution, the germanium content is low. If Treat it with conventional methods, that is, add sulfuric acid to the solution to adjust the pH value of the solution to 1-2, and add tannin to sink germanium. The production cost is higher than the value of germanium in the solution. Therefore, at present, the manufacturers of optical fiber rods do not recover the germanium in the solution. Germanium, resulting in a waste of germanium resources

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Take 100L of alkaline solution containing 8g / L of germanium obtained by absorbing the acid gas produced in the chlorination distillation process of germanium and treating it with the tail gas of the spray tower. In the tank of the anion exchange resin, the alkaline solution is added at a rate of 10 L / min, and the resin absorbs the sodium germanate in the solution to obtain a resin containing germanate ions, and the treated alkaline solution continues to absorb germanium after adding sodium hydroxide. Acidic gas produced in the chlorination distillation process; the resulting resin containing germanate ions is added to 100L of 1mol / L dilute hydrochloric acid to analyze germanium to obtain an acidic solution containing tetravalent germanium ions and the resin after analysis. After the resin is washed with deionized water to prepare for the next germanium adsorption, the washing solution is incorporated into the acidic solution containing tetravalent germanium ions, and 4kg...

Embodiment 2

[0019] Take 150L of alkaline solution containing 9g / L of germanium obtained by absorbing the acid gas produced in the chlorination distillation process of germanium and absorbing the tail gas of the spray tower. In the tank of the anion exchange resin, the alkaline solution is added at a rate of 10 L / min, and the resin absorbs the sodium germanate in the solution to obtain a resin containing germanate ions, and the treated alkaline solution continues to absorb germanium after adding sodium hydroxide. Acidic gas produced in the chlorination distillation process; the obtained resin containing germanate ions is added into 120L of 0.5mol / L dilute sulfuric acid to analyze germanium to obtain an acidic solution containing tetravalent germanium ions and the resin after analysis. After the final resin is washed with deionized water to prepare for the next germanium adsorption, the washing solution is incorporated into the acidic solution containing tetravalent germanium ions, and 5kg o...

Embodiment 3

[0021] Get 100L of alkaline solution containing 0.3g / L of germanium obtained by absorbing the acid gas produced in the chlorination distillation process of germanium through the absorption treatment of the spray tower tail gas, and add the alkaline solution to a 201×7MB weak alkaline solution at room temperature. In the tank of styrene-based anion exchange resin, the adding rate of alkaline solution is 10L / min. The resin adsorbs the sodium germanate in the solution to obtain a resin containing germanate ions, and after adding sodium hydroxide to the treated alkaline solution, continues to absorb the acid gas produced in the chlorination distillation process of germanium; the obtained germanate ion-containing Add the resin in 100L of 1mol / L dilute hydrochloric acid to carry out the analysis of germanium to obtain the acidic solution of tetravalent germanium ions and the resin after analysis. The resin after analysis is washed with deionized water to prepare for the next germaniu...

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PUM

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Abstract

The invention discloses a method for receiving germanium in germanium containing liquid waste. According to the method, a resin adsorption principle is adopted for conducting spray tower tail gas adsorption processing on acid gas generated in the germanium chlorination distillation process, and an alkaline solution is obtained; in the optical fiber bar preparing process, germanium in a solution obtained by using sodium hydroxide to process excessive germanium tetrachloride gas and silicon tetrachloride gas is thoroughly absorbed into resin, the germanium is resolved from the resin through acidification, and then the germanium is enriched through ferric salt to obtain germanium concentrates; and finally, chlorination distilling and hydrolysis are carried out to obtain high-purity germaniumdioxide, the germanium in the solution is effectively recovered, and the germanium average recovery rate can reach 95%. By means of the method, the problems about high production cost and environmental pollution which are generated by germanium sedimentation through a

Description

technical field [0001] The invention relates to the technical field of hydrometallurgy, in particular to a method for recovering germanium in germanium-containing waste liquid. Background technique [0002] Germanium is a kind of scattered metal with few reserves in nature, mainly associated with lignite, lead-zinc ore and copper mine in South Africa. The proven reserves of germanium in the world are 8,600 tons, which is only enough for more than 40 years based on the current consumption of germanium; germanium is an important strategic resource, which is used in high-tech fields such as aerospace, optical fiber communication, infrared optics, and new energy All have irreplaceable applications. With the development of high-tech in my country and the continuous upgrading of industrial structure, the consumption level of germanium will maintain a rapid growth. [0003] At present, the raw materials for germanium production include two aspects. One is to extract germanium from ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B7/00C22B41/00C22B3/24
CPCC22B3/24C22B7/006C22B41/00Y02P10/20
Inventor 王朋
Owner 苏州朴拙材料有限公司
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