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Boron trichloride production method

A boron trichloride and manufacturing method technology, applied in chemical instruments and methods, boron halide compounds, carbon compounds, etc., can solve problems such as the complexity of the boron trichloride manufacturing process, and achieve the effect of difficult to block and simple manufacturing process

Active Publication Date: 2021-02-02
RESONAC CORPORATION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

That is, if the technology disclosed in Patent Document 1 is applied to the above-mentioned method for producing boron trichloride, there is a problem that the production process of boron trichloride becomes complicated.

Method used

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  • Boron trichloride production method
  • Boron trichloride production method

Examples

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Effect test

Embodiment 1

[0087] use with figure 1 The boron trichloride production device having the same configuration as the boron trichloride production device performs the same operation as the above-mentioned embodiment, and reacts the powder of the raw material boron carbide with the gas containing chlorine to produce boron trichloride.

[0088] As the chlorine-containing gas, commercially available high-purity chlorine gas having a purity of 99.999% by volume and a water content of 0.9 ppm by volume was used.

[0089] As the raw material boron carbide powder, a boron carbide powder having a D95 of 48 μm measured by a laser diffraction method was used. In addition, the types and contents of metals other than boron contained in the raw material boron carbide powder are as follows. That is, 0.30% by mass of iron, 0.027% by mass of aluminum, 0.037% by mass of calcium, 0.012% by mass of chromium, and 0.78% by mass of silicon.

[0090] Fill 0.3 g of the powder of boron carbide as the raw material i...

Embodiment 2

[0096] Except that the temperature for chlorinating the metal and the temperature for removing the metal chloride by reacting the metal contained in the raw material boron carbide powder with chlorine gas were set to 300° C., the same procedure as in Example 1 was carried out to produce three boron chloride. As a result, the iron content in the boron carbide from which the metal chloride was removed was 0.22% by mass. In addition, in the production reaction of boron trichloride, colored fouling thought to be metal chloride was not seen on the production pipeline of the boron trichloride production equipment, and the production pipeline of the boron trichloride production equipment did not occur clogged. Furthermore, the content of iron in the generated boron trichloride was 100 ppb by mass, and the content of aluminum was 6 ppb by mass. In addition, the yield of boron trichloride was 98%.

Embodiment 3

[0098] Except that the temperature for chlorinating the metal and the temperature for removing the metal chloride by reacting the metal contained in the raw material boron carbide powder with chlorine gas were set at 375° C., the same procedure as in Example 1 was carried out to produce three boron chloride. As a result, the iron content in the boron carbide from which the metal chloride was removed was 0.16% by mass. In addition, in the production reaction of boron trichloride, colored fouling thought to be metal chloride was not seen on the production pipeline of the boron trichloride production equipment, and the production pipeline of the boron trichloride production equipment did not occur clogged. Furthermore, the iron content in the produced boron trichloride was 80 mass ppb, and the aluminum content was 6 mass ppb. In addition, the yield of boron trichloride was 98%.

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Abstract

Provided is a production method for boron trichloride whereby high purity boron trichloride can be produced using a simple production method and production line blockages are unlikely to occur. This boron trichloride production method comprises: a metal chlorination step in which a chlorine gas-containing gas is caused to come in contact with a raw material boron carbide being a boron carbide containing a metal other than boron as an impurity, the chlorine gas in the chlorine gas-containing gas is reacted with the metal, a metal chloride is formed, and a boron carbide containing a metal chloride is obtained; a removal step in which the metal chloride is removed from the boron carbide containing the metal chloride obtained in the metal chlorination step; and a generation step in which the chlorine-gas containing gas is caused to come in contact with the boron carbide that has had the metal chloride removed during the removal step, the boron carbide and the chlorine gas in the chlorine-gas containing gas are reacted, and boron trichloride is generated.

Description

technical field [0001] The present invention relates to the manufacture method of boron trichloride. Background technique [0002] As boron trichloride (BCl 3 ) one of the manufacturing methods known to make chlorine (Cl 2 ) and boron carbide (B 4 C) A method for chlorination by reaction. This reaction can be represented by the following reaction formula. [0003] B 4 C+6Cl 2 →4BCl 3 +C [0004] However, in this production method, a dark brown oily substance is produced during the chlorination reaction, which may clog a boron trichloride production line. The main component of this oily substance is a metal chloride by-produced by reaction of metals such as iron (Fe) contained in boron carbide as an impurity with chlorine gas. In addition, there is also a problem that the purity of boron trichloride is lowered by mixing metal chlorides in the oily product into boron trichloride. [0005] For example, Patent Document 1 discloses a technique for refining (purifying) b...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B35/06
CPCC01B35/061Y02P20/10C01B32/991C01P2004/61C01P2004/51C01P2006/82
Inventor 毛利早纪栗原秀行
Owner RESONAC CORPORATION
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