Patent ID: 9242868
Filing Date: 2016-01-26
CPC Classification: B01D,B01J,C01B

Claim Text:
1. A process for separating monosilane from a mixture comprising at least monosilane, monochlorosilane, dichlorosilane, and trichlorosilane comprising: a) introducing said mixture to a condenser for separating lower-boiling chlorosilanes-containing monosilane from higher-boiling chlorosilanes enriched condensates; b) collecting said higher-boiling condensates, in a condensate buffer connected to the condenser by a condensate feed pipe; c) sending higher-boiling chlorosilanes enriched condensates from the condensate buffer into a subcooler which is installed on a reflux feed line connected to an upper portion of a chlorosilane absorber d) feeding a lower-boiling chlorosilanes-containing monosilane to the chlorosilane absorber for separating monosilane; e) extracting monosilane-rich gas from the upper portion of the chlorosilane absorber; characterized in that only one condenser is used during the process.