Patent ID: 9656869
Date: 2017-05-23
CPC Classifications: B01J,C01B,C01C

Claim:
1. A process for production of trisilylamine, comprising: charging monochlorosilane as a liquid to a reactor; passing ammonia into the liquid monochlorosilane in the reactor; reacting the ammonia and the monochlorosilane in a liquid phase in the reactor to obtain a reaction mixture comprising liquid monochlorosilane, liquid trisilylamine and solid ammonium chloride; transferring the reaction mixture from the reactor into and through a filter unit; collecting the solid ammonium chloride on the filter unit to obtain a filtrate of the liquid reaction mixture comprising monochlorosilane and trisilylamine; passing the filtrate from the filter unit into a first distillation column; distilling the monochlorosilane in the distillation column overhead, condensing the monochlorosilane and feeding the condensed monochlorosilane to the reactor; and removing gaseous substances from the first distillation column overhead to obtain a first distillation bottoms comprising trisilylamine; conveying the first bottoms into a second distillation column; distilling the trisilylamine from the first bottoms in the second distillation column overhead and condensing the distillate to obtain a condensate consisting of trisilylamine; and removing higher boilers from the system via second bottoms remaining in the second column; wherein the process is a continuous method.