Patent ID: 9034292
Filing Date: 2015-05-19
Classification: B01J,C01B

Abstract:
1. An apparatus for producing disilane through pyrolysis of monosilane, comprising: a monosilane pyrolysis unit configured to pyrolyze monosilane and produce disilane and higher silanes, the pyrolysis unit having a pyrolysis temperature of 400-460° C., a pyrolysis pressure of 3-5 bar and a pyrolysis gas space velocity of 60-500 hr a solid particle removal unit configured to remove particles produced by the pyrolysis unit, the solid particle removal unit comprising a metal filter for removing particles exceeding 0.1 μm in diameter, and a ceramic support provided behind the metal filter for removing particles of 0.1 μm or smaller in diameter; a condensing unit configured to condense and liquefy, after said removal of particles, unreacted monosilane, and disilane and higher silanes with three (3) to seven (7) silicon atoms produced as results of the pyrolysis by the pyrolysis unit, excluding hydrogen from a gas with the solid particles removed by said solid particle removal unit; a first separation unit configured to separate monosilane from a mixture of the liquefied unreacted monosilane, disilane and higher silanes; and a second separation unit configured to separate disilane from the resultant mixture containing disilane and higher silanes with three (3) to seven (7) silicon atoms.