Reaction apparatus for producing trichlorosilane and method for producing trichlorosilane

1. A reaction apparatus for producing trichlorosilane in which metal silicon powder is reacted with hydrogen chloride gas to generate trichlorosilane, comprising:

an apparatus body into which the metal silicon powder is supplied;

an ejection port for ejecting the hydrogen chloride gas into the apparatus body, which is opened on the upper face of a partition plate partitioning the bottom part of the apparatus body;

a mixture layer disposed on the upper side of the ejection port in which a plurality of plate-shaped holed pieces having a through hole penetrating in the thickness direction and a plurality of ball members are stacked in a mixed state; and

metal silicon powder supplied on the upper side of the mixture layer,

wherein the ball members are interposed between the plate-shaped holed pieces, and

the ball members and the plate-shaped holed pieces are mixed so as to give a mixture ratio of W 1 /W 2 =0.5 to 5 where a weight of ball members is expressed as W 1 and a weight of the plate-shaped holed pieces is expressed as W 2 .

2. The reaction apparatus for producing trichlorosilane according to claim 1 , wherein the ball member has a diameter of 5 mm to 20 mm,

the holed piece is formed in a circular flat-plate shape, the holed piece is set to be from 4 mm to 20 mm in an outer diameter, and

the through hole is of such a dimension that no ball member is inserted therethrough.