Abstract
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 platinum leaching into the product
phase was far below 1 ppm. Enhanced selectivity for the product
trichloro(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.
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