Method of producing boron trichloride

Patent metadata

Field	Value
Publication number	US-12049406-B2
Application number	US-201917054548-A
Country	US
Kind code	B2
Filing date	Jun 4, 2019
Priority date	Jun 26, 2018
Publication date	Jul 30, 2024
Grant date	Jul 30, 2024

Abstract

There is provided a method of producing boron trichloride, in which damage to a reaction container is inhibited. The method of producing boron trichloride includes performing reaction between chlorine gas in a gas containing the chlorine gas and particulate boron carbide ( 4 ) in a state in which the boron carbide ( 4 ) flows in the gas containing the chlorine gas.

First claim

The invention claimed is:

1. A method of producing boron trichloride, comprising performing reaction between chlorine gas in a gas containing the chlorine gas and particulate boron carbide in a state in which the boron carbide flows in the gas containing the chlorine gas, wherein,
in the performing the reaction, the boron carbide is dropped from an upper portion of a reaction container to a bottom portion of the reaction container, and the gas containing the chlorine gas is introduced into the reaction container to flow in an opposing direction with respect to a direction of movement of the boron carbide, and
the reaction between the chlorine gas in the gas containing the chlorine gas and the boron carbide is continuously performed, while continuously supplying the gas containing chlorine gas and the boron carbide into the reaction container and continuously exhausting a reaction product, and while an unreacted boron carbide from the reaction container drops to a receiving container that is placed below the reaction container and that communicates with a lower end of the reaction container.

2. The method of producing boron trichloride according to claim 1 , wherein the boron carbide has an average particle diameter D50 of less than 500 μm based on a volume.

3. The method of producing boron trichloride according to claim 1 , wherein the reaction between the chlorine gas in the gas containing the chlorine gas and the boron carbide is performed at a temperature of 600° ° C. or more.

4. The method of producing boron trichloride according to claim 1 , wherein the reaction between the chlorine gas in the gas containing the chlorine gas and the boron carbide is performed under a pressure of −0.050 MPaG or more and 0.500 MPaG or less.

5. The method of producing boron trichloride according to claim 1 , wherein the gas containing the chlorine gas consists of 50% by volume or more and 100% by volume or less of the chlorine gas, and a remainder inert gas.

6. The method of producing boron trichloride according to claim 1 , wherein a content of water vapor in the gas containing the chlorine gas is less than 1% by volume.

7. The method of producing boron trichloride according to claim 2 , wherein the reaction between the chlorine gas in the gas containing the chlorine gas and the boron carbide is performed at a temperature of 600° ° C. or more.

8. The method of producing boron trichloride according to claim 2 , wherein the reaction between the chlorine gas in the gas containing the chlorine gas and the boron carbide is performed under a pressure of −0.050 MPaG or more and 0.500 MPaG or less.

9. The method of producing boron trichloride according to claim 3 , wherein the reaction between the chlorine gas in the gas containing the chlorine gas and the boron carbide is performed under a pressure of −0.050 MPaG or more and 0.500 MPaG or less.

10. The method of producing boron trichloride according to claim 2 , wherein the gas containing the chlorine gas consists of 50% by volume or more and 100% by volume or less of the chlorine gas, and a remainder inert gas.

11. The method of producing boron trichloride according to claim 3 , wherein the gas containing the chlorine gas consists of 50% by volume or more and 100% by volume or less of the chlorine gas, and a remainder inert gas.

12. The method of producing boron trichloride according to claim 4 , wherein the gas containing the chlorine gas consists of 50% by volume or more and 100% by volume or less of the chlorine gas, and a remainder inert gas.

13. The method of producing boron trichloride according to claim 2 , wherein a content of water vapor in the gas containing the chlorine gas is less than 1% by volume.

14. The method of producing boron trichloride according to claim 3 , wherein a content of water vapor in the gas containing the chlorine gas is less than 1% by volume.

Assignees

• Showa Denko Kk
• Resonac Corp

Inventors

• Dou Jun
• MOURI Saki
• Kurihara Hideyuki

Classifications

• C01P2004/61

  Micrometer sized, i.e. from 1-100 micrometer · CPC title

• C01B32/991

  Boron carbide · CPC title

• C01P2004/60

  Particles characterised by their size · CPC title

• C01B35/061 Primary

  Halides · CPC title