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Method for manufacturing silicon tetrachloride and method for manufacturing silicon for use in a solar cell

A technology of solar cells and manufacturing methods, applied in chemical instruments and methods, halogenated silicon compounds, inorganic chemistry, etc., to achieve the effect of stable and inexpensive provision

Inactive Publication Date: 2012-09-05
JX NIPPON OIL & ENERGY CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0027] As mentioned above, the production process of silicon tetrachloride used in the zinc reduction method is produced through a two-step reaction, and there is a problem that a large amount of electric power is required, and there is room for improvement.

Method used

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  • Method for manufacturing silicon tetrachloride and method for manufacturing silicon for use in a solar cell
  • Method for manufacturing silicon tetrachloride and method for manufacturing silicon for use in a solar cell
  • Method for manufacturing silicon tetrachloride and method for manufacturing silicon for use in a solar cell

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Experimental program
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Effect test

Embodiment 1-1

[0079] As the silicon-containing substance, 100 mg of USY zeolite (manufactured by Catalytic Chemicals, ratio of silicon to aluminum: 150) was used, and 39 mg of coke (manufactured by New Japan Petroleum Corporation, carbon content: 99.9% by mass or more) was used as the carbon-containing substance. The surface area of ​​the USY zeolite (BET method) used is 570m 2 / g, the average pore size is The micropore capacity is 1.1 mL / g, the acid center is 0.5 mol / kg, and the coke is used after pulverizing a commercially available product through a ball mill. After the carbon-containing material is added to the silicon-containing material and mixed, a reaction mixture is obtained. It should be noted that the addition amount of the carbonaceous material and the number of moles of C contained in the reaction mixture satisfy the following formula (b).

[0080] The number of moles of C contained in the reaction mixture = 2A+3B...(b)

[0081] A: The number of moles of Si contained in the silico...

Embodiment 1-2

[0092] As the silicon-containing material, 100 mg of potassium-containing USY zeolite was used, and as the carbon-containing material, 39 mg of coke was used. The USY zeolite was ion-exchanged with a potassium hydroxide 10% aqueous solution (manufactured by Aldrich) to contain potassium, and its content was 3.2% by mass relative to the silica in the USY zeolite. The chlorination reaction was performed by contacting the reaction mixture with pure chlorine gas at 900° C. for 1 hour to obtain 250 mg of the product. The reaction conversion rate is shown in Table 5 below.

Embodiment 1-3

[0094] As the silicon-containing material, 100 mg of waste US Y zeolite was used, and as the carbon-containing material, 37 mg of coke was used. The waste USY zeolite used in this example was used as an ion exchange resin membrane. The reaction mixture was contacted with pure chlorine gas at 900° C. for 1 hour for chlorination reaction to obtain 228 mg of product. The reaction conversion rate is shown in Table 5 below.

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Abstract

In one aspect the present invention relates to a method for producing silicon tetrachloride comprising 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. The invention also relates to a method for producing silicon for solar cell.

Description

Technical field [0001] The present invention relates to a method for producing silicon tetrachloride using various inorganic silicon compounds as raw materials and a method for producing silicon for solar cells. Background technique [0002] Silicon tetrachloride is used as a synthetic raw material for fine silicon dioxide, synthetic quartz, silicon nitride, and various other organosilicon compounds, and in recent years has attracted attention as a raw material for silicon for solar cells. [0003] In recent years, in order to prevent global warming, the reduction of carbon dioxide emissions as one of the causative substances has become a major issue. As its solution, solar cells have attracted much attention, and their demand has also shown significant development. At present, the mainstream solar cell is a solar cell that uses silicon as a power generation layer. Therefore, with the development of the demand for solar cells, the demand for silicon for solar cells is in a dilemma...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B33/107
CPCC01B33/10721C01B33/10726C01P2006/80
Inventor 林慎也朝野刚
Owner JX NIPPON OIL & ENERGY CORP
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