Method for extracting germanium and removing chlorine in zinc sulfate solution

A zinc sulfate solution and zinc sulfate technology, applied in the direction of improving process efficiency, etc., can solve the problems of low removal efficiency, complicated process, high cost, etc., and achieve the effect of simple process method, high extraction rate, and improved production efficiency

Inactive Publication Date: 2017-06-13
卜琰
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, these methods also have a series of problems such as low removal efficiency, complex process and high cost.

Method used

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  • Method for extracting germanium and removing chlorine in zinc sulfate solution

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preparation example Construction

[0038] 2) Preparation of mixed extractant: Mix N235, 2-octanol and sulfonated kerosene evenly to prepare a mixed extractant. The volume of N235 in the mixed extractant is 5-40%, and the volume of 2-octanol is 3~10%, the balance is sulfonated kerosene;

[0039] 3) Extraction: Add the mixed extractant prepared in step (2) to the mixed solution obtained in step (1), mix thoroughly, extract, and separate to obtain the organic phase and residual liquid. The amount of the mixed extractant added is 0.3 to 3 times the volume of the solution, and the remaining liquid is returned to the zinc sulfate or electrolytic zinc system;

[0040] 4) Water washing and stripping: wash the organic phase obtained in step (3) with dilute acid or water, and then use a stripping agent for stripping to obtain a stripping liquid, and then neutralize and precipitate the stripping liquid to recover germanium.

[0041] The germanium-containing zinc sulfate solution described in step (1) is the germanium-con...

Embodiment 1

[0056] The method of the present invention is implemented in Yunnan Yesheng Environmental Resources Technology Co., Ltd., and the results are as follows:

[0057] Raw materials: feed liquid 30m³, containing sulfuric acid [H + 】17.86g / l, 【Cl - 】819mg / l, 【Ge 4+ 】223.83mg / l.

[0058] process:

[0059] 1) Complexation: Add complexing agent tartaric acid to the germanium-containing zinc sulfate solution (feed liquid), the addition amount is 10 times the content of germanium, and then mix it well to control the acidity of the solution at 10~100g / l to obtain a mixed solution ;

[0060] 2) Preparation of mixed extractant: Mix N235, 2-octanol and sulfonated kerosene evenly to prepare a mixed extractant. In the mixed extractant, the volume of N235 is 5%, and the volume of 2-octanol is 10%. , the balance being sulfonated kerosene;

[0061] 3) Extraction: Add the mixed extractant prepared in step (2) to the mixed solution obtained in step (1), mix thoroughly, perform four-stage coun...

Embodiment 2

[0065] The method of the present invention is implemented in Yunnan Yesheng Environmental Resources Technology Co., Ltd., and the results are as follows:

[0066] Raw materials: 200 cubic meters of feed liquid, containing sulfuric acid [H + 】15.25g / l, 【Cl - 】2460mg / l, 【Ge 4+ 】104.59mg / l.

[0067] process:

[0068] 1) Complexation: Add complexing agent tartaric acid to the germanium-containing zinc sulfate solution (feed liquid), the addition amount is 8 times the content of germanium, and then fully mix it to control the acidity of the solution at 10~100g / l to obtain a mixed solution ;

[0069] 2) Preparation of mixed extractant: Mix N235, 2-octanol, modifier and sulfonated kerosene evenly to prepare a mixed extractant. The volume of N235 in the mixed extractant is 30%, and the volume of 2-octanol Parts by volume are 8%, the modifying agent of 2% by volume, and the balance is sulfonated kerosene; the modified agent is ethyl octanol;

[0070] 3) Extraction: Add the mixed ...

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Abstract

The invention discloses a method for extracting germanium and removing chlorine in a zinc sulfate solution. The method includes the following steps that firstly, complexing is conducted, wherein a complexing agent is added into the low-germanium and high-chlorine zinc sulfate solution, sufficient mixing is conducted, and a mixed solution is obtained; secondly, a mixed extraction agent is prepared, wherein N235, octanol and sulfonated kerosene are evenly mixed to be prepared into the mixed extraction agent; thirdly, extracting is conducted, wherein the mixed extraction agent is added into the mixed solution, sufficient mixing is conducted, extracting is conducted, and an organic phase and raffinate are obtained through separation; and fourthly, washing and stripping are conducted, wherein the organic phase is washed through dilute acid or clean water, stripping is conducted through a stripping agent, strip liquid is obtained, then the strip liquid is neutralized and precipitated, and germanium is recycled. The method for extracting and recycling the heavy metal of germanium and removing the harmful element of chloride ions at the same time from the zinc sulfate solution in the production process for producing electrolytic zinc or zinc sulfate in a zinc sulfate system is provided, the germanium element is extracted and recycled effectively, meanwhile, the harmful element of chlorine in the zinc sulfate solution is removed, the technological method is simple, and efficiency is high.

Description

technical field [0001] The invention belongs to the technical field of hydrometallurgy, and in particular relates to a method for extracting germanium and removing chlorine from a zinc sulfate solution. Background technique [0002] In the process of non-ferrous metallurgy, the raw materials used in the production of electrolytic zinc and zinc sulfate by sulfuric acid system method, especially the raw materials containing zinc fume, often contain precious metal germanium and the most harmful element chlorine, so the zinc sulfate solution obtained in the production process often contains Contains a small amount of germanium and a large amount of chloride ions. Germanium is an indispensable material for contemporary high-tech, and is widely used in many fields. Due to the low content of germanium in minerals, it cannot be mined as a single industrial raw material, so it can only be comprehensively recovered as a by-product in the non-ferrous metal smelting process. Because t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B3/40C22B41/00C22B19/20
CPCC22B3/402Y02P10/20
Inventor 卜琰沈健
Owner 卜琰
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