Method for extracting fine silicon powder from chlorosilane processing by-products and application
A chlorosilane and fine silicon powder technology, applied in the field of new energy materials, can solve the problems of large power consumption and equipment material consumption, and achieve the effect of avoiding short circuit phenomenon and low metal component content
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Method used
Image
Examples
Embodiment 1
[0034] In the methylchlorosilane plant, the metal silicon solid powder in the third cyclone receiving hopper is discharged into the iron tank and transferred to the powder processing workshop. Press 500 kg of metal silicon powder into the washing tank with nitrogen gas, after cooling to room temperature, press 800 liters of xylene, and stir for 3 hours. Nitrogen is injected into the closed plate-and-frame filter device, and the filtrate enters the filtrate tank, and is pumped into the distillation pot by a diaphragm pump for distillation and reuse. The filter cake is sent to the washing tank and washed three times by the above method. Then put the filter cake into the acidification kettle, and steam under reduced pressure at 160 degrees to remove residual xylene under stirring to obtain fluid metal silicon powder.
[0035] Throw in 500 kg of aqua regia under stirring, and the hydrogen is vented at high altitude through the condenser. Stir at 60°C for 3 hours, filter, and was...
Embodiment 2
[0040]In the methylchlorosilane plant, the metal silicon solid powder in the second cyclone receiving hopper is discharged into the iron tank and transferred to the powder processing workshop. Press 500 kg of metal silicon powder into the washing kettle with nitrogen gas, after cooling to room temperature, press 800 liters of trimethylchlorosilane, and stir for 3 hours. Nitrogen is injected into the closed plate-and-frame filter device, and the filtrate enters the filtrate tank, and is pumped into the distillation pot by a diaphragm pump for distillation and reuse. The filter cake is sent to the washing tank, and the above method can be washed once. Then put the filter cake into the acidification kettle, and evaporate the remaining trimethylchlorosilane under reduced pressure at 100 degrees under stirring to obtain fluid metal silicon powder.
[0041] Drop into 500 kilograms of waste hydrochloric acid and 10 kilograms of ferric chloride under stirring. Under stirring at 80°C...
Embodiment 3
[0043] In the methylchlorosilane plant, the metal silicon solid powder in the first cyclone receiving hopper is discharged into the iron tank and transferred to the powder processing workshop. Press 500 kg of metal silicon powder into the washing tank with nitrogen gas, after cooling to room temperature, press in 800 liters of dimethylchlorosilane, and stir for 3 hours. Nitrogen is injected into the closed plate-and-frame filter device, and the filtrate enters the filtrate tank, and is pumped into the distillation pot by a diaphragm pump for distillation and reuse. The filter cake is sent to the washing tank, and the above method can be washed three times. Then put the filter cake into the acidification kettle, and evaporate the remaining dimethylchlorosilane under reduced pressure at 100 degrees under stirring to obtain fluid metal silicon powder.
[0044] Drop into 500 kilograms of waste hydrochloric acid and 10 kilograms of ferric chloride under stirring. Under stirring a...
PUM
Login to View More Abstract
Description
Claims
Application Information
Login to View More