Fluidized bed reactor

Patent metadata

Field	Value
Publication number	US-10933396-B2
Application number	US-201816756041-A
Country	US
Kind code	B2
Filing date	Nov 16, 2018
Priority date	Nov 20, 2017
Publication date	Mar 2, 2021
Grant date	Mar 2, 2021

Abstract

Provided is a fluidized bed reactor (1) that makes it possible to stably measure a temperature distribution in the fluidized bed reactor (1) while no damage is caused to a temperature measuring section. Provided is a fluidized bed reactor (1) configured to generate trichlorosilane by reacting metallurgical grade silicon powder and hydrogen chloride gas, the fluidized bed reactor (1) including: a reaction vessel (10); and a plurality of temperature measuring sections (50), provided on an outer surface of the reaction vessel (10), each for measuring a temperature inside the reaction vessel (10).

First claim

The invention claimed is:

1. A fluidized bed reactor configured to generate trichlorosilane by reacting metallurgical grade silicon powder and hydrogen chloride gas, the fluidized bed reactor comprising:
a reaction vessel; and
a plurality of temperature measuring sections, provided on an outer surface of the reaction vessel, each for measuring a temperature distribution inside the reaction vessel from a temperature of the outer surface of the reaction vessel.

2. The fluidized bed reactor as set forth in claim 1 , wherein the outer surface of the reaction vessel on which outer surface the plurality of temperature measuring sections are provided is located in a vicinity of a gas supply port provided in a lower part of the reaction vessel.

3. The fluidized bed reactor as set forth in claim 2 , wherein the plurality of temperature measuring sections are provided along an entire circumference of the outer surface of the reaction vessel.

4. A fluidized bed reactor as set forth in claim 2 , further comprising:
a heating medium pipe provided above the gas supply port in the reaction vessel,
the plurality of temperature measuring sections including a temperature measuring section that is provided in a region in which no heating medium pipe is provided.

5. The fluidized bed reactor as set forth in claim 4 , wherein the plurality of temperature measuring sections further include a temperature measuring section that is provided in a region in which the heating medium pipe is provided.

6. A method for producing trichlorosilane by reacting metallurgical grade silicon powder and hydrogen chloride gas, the method comprising:
a temperature measuring step of measuring, from a temperature of an outer surface of a reaction vessel of a fluidized bed reactor, a temperature distribution inside the reaction vessel.

7. A method as set forth in claim 6 , further comprising a control step of controlling an amount of supply of hydrogen chloride gas in accordance with a result of the temperature measuring step.

Assignees

• Tokuyama Corp

Inventors

• Hirota Kenji
• Ogihara Katsuya

Classifications

• B01J8/1836

  Heating and cooling the reactor (B01J8/42 takes precedence) · CPC title

• B01J8/025

  in a cylindrical shaped bed · CPC title

• B01J4/004

  Sparger-type elements · CPC title

• C01B33/10763 Primary

  from silicon · CPC title

• B01J8/24 Primary

  according to "fluidised-bed" technique (B01J8/20 takes precedence) · CPC title