Method for recovering cooper and silicon powder from organosilicon waste residue

A technology of organosilicon and copper recovery, which is applied to the improvement of process efficiency, photographic technology, instruments, etc., can solve the problems of difficult dispersion of silicon powder, poor extraction and phase separation, and complicated copper existence, so as to achieve good extraction and phase separation effect , The process steps are simple, and the effect of avoiding emulsification phenomenon

Active Publication Date: 2013-02-27
ZHEJIANG TELI RECYCLING RESOURCES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantages of this method are: 1. Silicon powder is not easy to disperse. When gravity separation is carried out, a large amount of copper or copper salt will be mixed in the silicon powder, resulting in a low recovery rate of copper; 2. There are more organic matter in the organic waste residue. , this method does not deal with the organic matter. During the extraction, the emulsification is very serious, and the phase separation of the extraction is not good; 3. The existence of copper in the organic sili

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0033] Example 1

[0034] (1) Maturation: The organic silicon waste residue is mixed with 98% concentrated sulfuric acid and then heated and matured. Cu in the organic silicon waste residue and H in the concentrated sulfuric acid 2 SO 4 The molar ratio is 1:1, the curing time is 2h, and the curing temperature is 80°C. During this time, stirring is continued to obtain the curing material.

[0035] (2) Water immersion: Pour the clinker into the water and continuously stir the water, the mass ratio of the clinker to water is 1:2, the immersion time is 2h, the temperature is 50℃, and the leaching slurry is obtained.

[0036] (3) Solid-liquid separation: perform solid-liquid separation on the leached slurry, and the separated solid phase is washed with water and dried to obtain silicon powder.

[0037] (4) Extraction: The liquid phase separated in step (3) is subjected to ultrasonic treatment and then extracted with a copper extractant to obtain an extract. The contact volume ratio of the s...

Example Embodiment

[0042] Example 2

[0043] (1) Maturation: The organic silicon waste residue is mixed with 98% concentrated sulfuric acid and then heated and matured. Cu in the organic silicon waste residue and H in the concentrated sulfuric acid 2 SO 4 The molar ratio is 1:1.5, the curing time is 1.5h, and the curing temperature is 70°C. During the continuous stirring, the clinker is obtained.

[0044] (2) Water immersion: Pour the clinker into the water and continuously stir the water, the mass ratio of the clinker to water is 1:3, the immersion time is 1h, and the temperature is 40℃ to obtain the leaching slurry.

[0045] (3) Solid-liquid separation: perform solid-liquid separation on the leached slurry, and the separated solid phase is washed with water and dried to obtain silicon powder.

[0046] (4) Extraction: The liquid phase separated in step (3) is subjected to ultrasonic treatment and then extracted with a copper extractant to obtain an extract. The contact volume ratio of the separated liqu...

Example Embodiment

[0051] Example 3

[0052] (1) Maturation: The organic silicon waste residue is mixed with 98% concentrated sulfuric acid and then heated and matured. Cu in the organic silicon waste residue and H in the concentrated sulfuric acid 2 SO 4 The molar ratio is 1:2, the curing time is 1h, and the curing temperature is 50°C. During the continuous stirring, the clinker is obtained.

[0053] (2) Water immersion: Pour the clinker into the water and continuously stir the water, the mass ratio of the clinker to water is 1:4, the immersion time is 0.5h, the temperature is 30℃, and the leaching slurry is obtained.

[0054] (3) Solid-liquid separation: perform solid-liquid separation on the leached slurry, and the separated solid phase is washed with water and dried to obtain silicon powder.

[0055] (4) Extraction: the liquid phase separated in step (3) is subjected to ultrasonic treatment and then extracted with a copper extractant to obtain the extract. The contact volume ratio of the separated li...

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PUM

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Abstract

The present invention relates to the technical field of organosilicon production, and discloses a method for recovering copper and silicon powder from organosilicon waste residue. The method comprises the following steps: (1) ripening, (2) water dipping, (3) solid-liquid separation, (4) extraction, (5) washing, (6) back extraction, and (7) copper electrowinning. According to the present invention, concentrated sulfuric acid is adopted to carry out oxidation so as to easily achieve complete copper recovery; during extraction, an ultrasonic treatment is adopted so as to avoid emulsification phenomenon generated during extraction, and provide a good extraction phase separation effect; and process steps are simple, treatment cost is low, operation is easy, recovery rates of cooper and silicon powder are more than 95%, the obtained electrowinning cooper has a purity of more than 99.95%, the obtained silicon powder has a purity of more than 90%, recovery rates of cooper and silicon powder are high, and purities are good.

Description

technical field [0001] The invention relates to the technical field of organosilicon production, in particular to a method for recovering copper and silicon powder from organosilicon waste residue. Background technique [0002] Organosilicon is a kind of polysiloxane or polysiloxane, which has a high bond energy and is not easy to break, with silicon atoms and chlorine atoms or oxygen atoms in the molecular chain. [0003] In the production process of organosilicon chemical products such as methylchlorosilane and phenylchlorosilane, organosilicon monomer is the main raw material, copper powder or copper salt is used as catalyst, and the mixture of unreacted silicon powder and catalyst in its production is called Organic silicon waste residue contains a considerable amount of silicon powder, copper powder or copper salt, which has a high recovery value. If it is directly buried, it will not only cause serious environmental pollution, but also lose a large amount of silicon and...

Claims

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Application Information

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IPC IPC(8): C22B7/00C22B3/08C22B3/26C25C1/12C22B15/00
CPCY02P10/20
Inventor 陈剑峰
Owner ZHEJIANG TELI RECYCLING RESOURCES
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