Method for recycling silicon
OwnerYu-Lung Sun, Yung-Hao Liuinventors
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Abstract
A method for recycling silicon, comprises a filtrating step, providing a siliceous mortar containing silicon carbide, silicon and a buffer, and further filtering out the buffer form the siliceous mortar to obtain a siliceous slurry; a removing step, heating the siliceous slurry till the buffer has evaporated to obtain a mixture of silicon and silicon carbide; a stirring step, placing the mixture of silicon and silicon carbide in a liquid-substrate followed by stirring and incubating for a while to obtain a sedimentation of the mixture of silicon and silicon carbide and a suspension containing the liquid-substrate and silicon; and a purifying step, filter off the liquid-substrate in the suspension, and silicon powders are obtained.
Claims8
A method for recycling silicon, comprising:
- a filtrating step, providing a siliceous mortar with silicon carbide, silicon and a buffer, and further filtering out the buffer form the siliceous mortar to obtain a siliceous slurry;
- a removing step, heating the siliceous slurry to evaporated the buffer and to obtain a mixture of silicon and silicon carbide;
- a stirring step, placing the mixture of silicon and silicon carbide in a liquid-substrate followed by stirring and incubating for a while to obtain a sedimentation of the mixture of silicon and silicon carbide and a suspension containing the liquid-substrate and silicon;
- and
- a purifying step, filtering off the liquid-substrate in the suspension to obtain silicon powders.
A method for recycling silicon, comprising:
- a filtrating step, providing a siliceous mortar containing silicon carbide, silicon and a buffer, and further filtering out the buffer form the siliceous mortar to obtain a siliceous slurry;
- a removing step, heating the siliceous slurry to evaporate the buffer and obtain a mixture of silicon and silicon carbide;
- a separating step, placing the mixture of silicon and silicon carbide in an alkaline solution to dissolve the silicon from the mixture of silicon and silicon carbide into the alkaline solution;
- and
- a recycling step, recycling silicon from the alkaline solution to obtained a siliceous product.
Dependencies are inferred from the claim text.