Process for purifying halosilanes
AssigneeDow Corning Corporation
InventorsCatherine L. Bothe Almquist, Michael A. Diaz, Roland L. Halm, James R. Hasler, Jr., James S. Smith
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Abstract
A process for purifying halosilanes consisting of contacting a mixture comprising a halosilane and a hydrocarbon with an adsorbent selective for the hydrocarbon, thereby reducing the hydrocarbon content of the mixture. The present process is particularly useful for removing hydrocarbon contaminates from chlorosilanes, where the hydrocarbon contaminates have a boiling point similar to that of the chlorosilanes.
Claims15
A process for reducing hydrocarbon content of halosilanes, the process comprising:
- contacting a liquid mixture comprising a halosilane and a hydrocarbon with an adsorbent selective for the hydrocarbon, thereby reducing the hydrocarbon content of the mixture.
A process for reducing hydrocarbon content of chlorosilanes, the process comprising:
- (A) contacting a liquid mixture comprising a chlorosilane described by formula R.sub.a H.sub.b SiCl.sub.4-a-b, where a=0 to 3, b=0 to 3, a+b=0 to 3, and R is a monovalent hydrocarbon radical comprising one to 12 carbon atoms, and a hydrocarbon comprising one to 12 carbon atoms with an adsorbent selective for the hydrocarbon, thereby recovering a chlorosilane reduced in hydrocarbon content,
- (B) desorbing the adsorbent to remove the hydrocarbon, and
- (C) reusing the adsorbent as described in steps (A) and (B).
Dependencies are inferred from the claim text.