Patent ID: 8491862

Claim:
A method for producing trichlorosilane comprising: providing a cooler with a chamber having at least first and second nozzles configured to spray droplets of cooling liquids having at least two different average droplet diameters in which a cooling rate of the reaction product gas is adjusted by adjusting independently the cooling liquids volume sprayed from each of the first and second nozzles; converting a raw material gas containing tetrachlorosilane and hydrogen into a reaction product gas; and cooling the reaction product gas to a range of 600 to 950° C. for 0.01 to 1 second for producing a reaction product containing trichlorosilane, wherein during cooling, the reaction product gas is cooled in the cooler by spraying the cooling liquids having different average droplet diameters in a mixed state, the first nozzle sprays droplets having a first average droplet diameter between 2.0 mm and 6.0 mm, the second nozzle sprays droplets having a second average droplet diameter between 0.3 mm and 2.0 mm which is different from the first average droplet diameter, and the cooling liquid is a mixed liquid containing tetrachlorosilane and trichlorosilane.