How chlorosilanes are distilled
Distillation is not a reaction. It is a liquid → gas → liquid phase
change.
Each of the chlorosilanes produced during the synthesis
stage has a unique boiling point. These boiling points are used to distill the
chlorosilanes from one another based on the number of chlorine atoms attached
to the molecule.
Because the boiling points of the various chlorosilanes are so close
together, very tall distillation columns are required to separate them.
Once separated, the chlorosilanes are ready to be turned into useful
siloxanes through the process of hydrolysis
and condensation.
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Did you know ... Outside of the petroleum industry, Dow
Corning Corporation maintains the largest distillation operation
in the world!
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