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US 2012/0244059 A1Published application
Method for manufacturing silicon tetrachloride and method for manufacturing silicon for use in a solar cell
AssigneeJx Nippon Oil & Energy Corporation
InventorsShinya Hayashi, Tsuyoshi Asano
Life of this patent
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Abstract
In one aspect of a method for producing silicon tetrachloride comprises a step in which a silicon-containing substance that contains zeolite or preferably spent zeolite, is used for chlorination in the presence of a carbon containing substance.
Claims20
A method for producing silicon tetrachloride, wherein a silicon-containing substance that contains zeolite is chlorinated in the presence of a carbon-containing substance.
A method for producing silicon for solar cell comprising:
- (1) chlorinating a silicon-containing substance that contains zeolite in the presence of a carbon-containing substance to produce silicon tetrachloride;
- (2) separating and refining the silicon tetrachloride produced in (1);
- and (3) reacting the silicon tetrachloride refined in (2) with a zinc gas to produce polycrystalline silicon.
Dependencies are inferred from the claim text.