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Process for production of silicon tetrachloride

A manufacturing method and technology of silicon tetrachloride, applied in chemical instruments and methods, halogenated silicon compounds, inorganic chemistry, etc., can solve problems such as difficult catalytic ability

Inactive Publication Date: 2012-10-03
JX NIPPON OIL & ENERGY CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore, it is difficult to fully disperse the catalyst in the raw material, and it is difficult to say that the catalytic ability can be fully exerted.

Method used

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  • Process for production of silicon tetrachloride
  • Process for production of silicon tetrachloride
  • Process for production of silicon tetrachloride

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1）

[0068] As the silicic acid-containing substance, 100 mg of silica was used, and as the carbon-containing substance, 45 mg of ash produced by an industrial process was used. The ashes produced by industrial processes used in this example are those produced by waste incineration facilities, and were used without pulverization. Silica is used after being pulverized by a ball mill. It should be noted that the surface area (BET method) of the pulverized silica is 2160cm 2 / g, the silica content is 95.2% by mass, the carbon content of the ash produced by the industrial process used is 85.2% by mass, the average particle size is 17μm, and the surface area (BET method) is 19m 2 / g.

[0069] After the carbonaceous material is added to the silicic acid-containing material and mixed, a reaction mixture is obtained. It should be noted that the amount of the carbon-containing substance added is such that the number of moles of C contained in the reaction mixture becomes twice the number...

Embodiment 2）

[0076] 100 mg of silica was used as the silicic acid-containing substance, and 49 mg of ash generated from a power generation facility was used as the carbon-containing substance. The ash generated by the power generation facility used in this example is ash generated by IGCC, and it was used without pulverization. It should be noted that the surface area (BET method) of the pulverized silica is 2160cm 2 / g, the silica content is 95.2% by mass, the carbon content of the IGCC ash used is 79.0% by mass, the sulfur content is 5.9% by mass, the average particle size is 8μm, and the surface area (BET method) is 23m 2 / g. The reaction mixture was produced by the same technique as in Example 1, and was brought into contact with pure chlorine gas at 600 to 900° C. to carry out chlorination reaction. The time change of the reaction conversion rate to silicon tetrachloride at each reaction temperature is shown in figure 2 .

Embodiment 3）

[0078] As the silicic acid-containing substance, 100 mg of ash of silicic acid biomass was used, and as the carbon-containing substance, 37 mg of ash generated from a power generation facility was used. The ashes of the silicic acid biomass used in the present example are the ash of the biomass saccharification residue generated in the production of bioalcohol, and the ash generated from the power generation facility is the ash generated from the IGCC, and both were used without pulverization. It should be noted that the silica content of the ash of silicic acid biomass is 71.8% by mass, the carbon content of the IGCC ash used is 79.0% by mass, the sulfur content is 5.9% by mass, the average particle size is 8 μm, and the surface area ( BET method) is 23m 2 / g. The reaction mixture was produced by the same technique as in Example 1, and was brought into contact with pure chlorine gas at 600 to 900° C. to carry out chlorination reaction. The time change of the reaction conver...

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Abstract

An aspect of a process for producing silicon tetrachloride comprises chlorinating a silicon-containing substance, preferably a silicon-containing substance that contains a silicic acid biomass, in the presence of a carbon-containing substance that contains ash produced in an industrial process, preferably ash produced in a power-generating facility in which an organic material is combusted and a combustion energy produced is converted into an electric power.

Description

technical field [0001] The present invention relates to a method for producing silicon tetrachloride using various inorganic silicon compounds as raw materials. Background technique [0002] Silicon tetrachloride can be used as a raw material for the synthesis of fine silica, synthetic quartz, silicon nitride, and various other organosilicon compounds, and has attracted attention as a raw material for silicon for solar cells in recent years. [0003] In recent years, in order to prevent global warming, the reduction of the emission of carbon dioxide, which is one of the causative substances, has become a major issue. As a solution thereof, solar cells are attracting attention, and the demand thereof shows remarkable development. At present, the mainstream solar cells use silicon as the power generation layer. Therefore, with the development of the demand for solar cells, the demand for silicon for solar cells is in a difficult situation. [0004] On the other hand, the cur...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B33/107B09B3/00
CPCC01P2006/12C01B33/1071Y02E50/30
Inventor 林慎也朝野刚
Owner JX NIPPON OIL & ENERGY CORP
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