Patent ID: 9480959
Filing Date: 2016-11-01
CPC Classification: B01J,C01B,Y02P

Claim Text:
1. A process for hydrogenating chlorosilanes in a reactor, wherein at least two reactant gas streams are introduced separately from one another into a reaction zone, wherein a first reactant gas stream comprising silicon tetrachloride is conducted through a first heat exchanger unit in which it is heated and is then conducted through a heating unit which heats the first reactant gas stream to a first temperature before the first reactant gas stream reaches the reaction zone, and wherein a second reactant gas stream comprising hydrogen is heated by a second heat exchanger unit to a second temperature, wherein the first temperature is greater than the second temperature, and then introduced into the reaction zone, such that a mean gas temperature in the reaction zone is from 850° C. to 1300° C., and said at least two reactant gas streams react to give product gases comprising trichlorosilane and hydrogen chloride, wherein the product gases obtained in the reaction are conducted in a product gas stream through said at least two heat exchanger units and preheat the at least two reactant gas streams of the reaction by a countercurrent principle, wherein the product gas stream passes first through the first heat exchanger unit and then through the second heat exchanger unit.