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
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[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...
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[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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