Method for recovering silicon and germanium from germanium-containing optical fiber waste

A technology of optical fiber and silicon germanium, which is applied in the field of silicon germanium recycling and reuse, can solve the problems of low germanium recovery rate, environmental pollution, and a large amount of other waste and waste liquid, so as to improve the leaching rate and leaching speed, reduce the reaction temperature, and save the process The effect of the process

Inactive Publication Date: 2019-10-29
XIAN CATALYST NEW MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The current method of recovering germanium from germanium-containing optical fiber waste has a low recovery

Method used

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  • Method for recovering silicon and germanium from germanium-containing optical fiber waste

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Embodiment 1

[0031] The method for reclaiming silicon germanium from germanium-containing optical fiber waste in this embodiment comprises the following steps:

[0032] Step 1, putting germanium-containing optical fiber waste into a crusher for crushing for 2 hours, and sieving the crushed germanium-containing optical fiber waste to obtain germanium-containing optical fiber waste powder with a particle size of 150 meshes;

[0033] Step 2. Mix 100g of the germanium-containing optical fiber waste powder described in step 1 with 500g of water for beating, add soluble alkali to the obtained slurry, and microwave the slurry with soluble alkali to 90°C under vacuum conditions and then keep the temperature constant 2h, filter, obtain silicon-germanium-containing leaching solution, take a sample and carry out ICP analysis, obtain the content of silicon in the silicon-germanium-containing leaching solution to be 95.42%, and the content of germanium is 3.35%; The quality of described soluble alkali i...

Embodiment 2

[0040] The method for reclaiming silicon germanium from germanium-containing optical fiber waste in this embodiment comprises the following steps:

[0041] Step 1, putting germanium-containing optical fiber waste into a crusher for crushing for 6 hours, and sieving the crushed germanium-containing optical fiber waste to obtain germanium-containing optical fiber waste powder with a particle size of 200 mesh;

[0042] Step 2. Mix 100g of the germanium-containing optical fiber waste powder described in step 1 with 500g of water for beating, add soluble alkali to the obtained slurry, and microwave the slurry with soluble alkali to 100°C under vacuum conditions, then keep the temperature constant 8h, filter to obtain silicon-germanium-containing leaching solution, take a sample and carry out ICP analysis, obtain that the content of silicon in the silicon-germanium-containing leaching solution is 94.48%, and the content of germanium is 2.83%; the quality of the soluble alkali is 0.25...

Embodiment 3

[0049] The method for reclaiming silicon germanium from germanium-containing optical fiber waste in this embodiment comprises the following steps:

[0050] Step 1, putting germanium-containing optical fiber waste into a crusher for crushing for 4 hours, and sieving the crushed germanium-containing optical fiber waste to obtain germanium-containing optical fiber waste powder with a particle size of 250 meshes;

[0051] Step 2. Mix 100g of the germanium-containing optical fiber waste powder described in step 1 with 500g of water for beating, add soluble alkali to the obtained slurry, and microwave the slurry with soluble alkali to 110°C under vacuum conditions, then keep the temperature constant 3h, filter to obtain silicon-germanium-containing leaching solution, take a sample and carry out ICP analysis, obtain that the content of silicon in the silicon-germanium-containing leaching solution is 96.73%, and the content of germanium is 3.05%; the quality of the soluble alkali is 0....

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Abstract

The invention discloses a method for recovering silicon and germanium from germanium-containing optical fiber waste. The method comprises the following steps: 1, the crushed germanium-containing optical fiber waste is screened, and powder is obtained; 2, the powder and water are mixed to be beaten, soluble alkali is added, under the vacuum condition, after microwave heating, the temperature keepsconstant, and leachate containing the silicon and the germanium is obtained; 3, an alkali metal salt is added into the leachate containing the silicon and the germanium, the pH is regulated, stirring,aging and solid-liquid separation are conducted, and a solid and liquid are obtained; 4, the solid is dried, and amorphous silicon dioxide is obtained; 5, a magnesium salt is added into the liquid, stirring for germanium sedimentation, aging and filtering are conducted, and residue and filtrate are obtained; 6, ferric chloride is added into the filtrate, precipitation adsorption reaction, aging and filtering are conducted, and precipitation is obtained; and 7, the residue and the precipitation are mixed with water to be beaten, the mixture is mixed with hydrochloric acid to be distilled, germanium tetrachloride is obtained and hydrolyzed, and germanium dioxide is obtained. According to the method, the silicon and the germanium in the waste can be effectively recovered, and the silicon andthe germanium are separated.

Description

technical field [0001] The technical field of silicon germanium recovery and reuse of the present invention particularly relates to a method for recovering silicon germanium from germanium-containing optical fiber waste. Background technique [0002] As an important scattered metal, germanium is an important semiconductor material next to silicon. Germanium and silicon are widely used in various fields such as fiber optic waste communication, infrared optics, solar cells, aerospace, chemical catalysis, and biomedicine. the use of. Silicon resources are relatively abundant, while germanium resources in the world are relatively poor. The proven reserves of germanium in the world are only enough for more than 40 years. Since there are few independent germanium deposits in nature, the germanium element in nature is mainly associated with other non-ferrous metal ores. There are two main ways to obtain germanium: one is by smelting Zn, Al, Cu, Pb, Fe Enrichment and recovery of g...

Claims

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Application Information

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IPC IPC(8): C01B33/12C01G17/02B09B3/00B09B5/00C22B7/00C22B41/00
CPCC01B33/12C01G17/02B09B5/00C22B7/008C22B7/001C22B41/00B09B3/80Y02P10/20
Inventor 翟康张涵张磊王昭文张力程杰
Owner XIAN CATALYST NEW MATERIALS CO LTD
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