Liquid-Liquid Biphasic, Platinum-Catalyzed Hydrosilylation of Allyl Chloride with Trichlorosilane using an Ionic Liquid Catalyst Phase in a Continuous Loop Reactor

摘要

The platinum-catalyzed hydrosilylation of allyl chloride with trichlorosilane was investigated in an ionic liquid-organic biphasic reaction mode. After an ionic liquid screening and repetitive batch mode experiments, the process was realized in a continuous mode using a loop reactor concept with integrated continuous separation and recycling of the ionic liquid catalyst phase. The continuous reactor could be operated for 48 h at constant activity and selectivity without addition of platinum indicating that plati- num leaching into the product phase was far below 1 ppm. Enhanced selectivity for the product tri-chloro(3-chloropropyl)silane (compared to the state-of-the art) and the possibility to use simple platinum tetrachloride (PtCl4) as platinum source are further attractive features of this new ionic liquid-based process concept.