Fluidized-bed-type reactor, and method for manufacturing trichlorosilane

A fluidized-bed reactor for producing trichlorosilane by causing metallurgical grade silicon powder and a hydrogen chloride gas to react with each other, comprising a

• reaction vessel configured to contain the metallurgical grade silicon powder and the hydrogen chloride gas,
• the reaction vessel having a side wall surrounding a fluid bed which is formed by a flow of the metallurgical grade silicon powder which is caused to flow by the hydrogen chloride gas,
• the reaction vessel having a gas feed opening which is provided in a lower part of the reaction vessel and through which the hydrogen chloride gas is supplied,
• a portion of the side wall which portion extends along at least 80% of a height extending from the gas feed opening to a top face of the fluid bed having such a tapered shape that a cross section of the reaction vessel which cross section is taken perpendicular to a height direction of the reaction vessel increases in area in an upward direction,
• a distributor plate having the gas feed opening and configured to disperse the hydrogen chloride gas from the gas feed opening,
• the distributor plate being provided in the lower part of the reaction vessel,
• the side wall having the tapered shape from a boundary between the fluid bed and the distributor plate.