Patent ID: 6238636
Filing Date: 2001-05-29
Classification: C01B,F17C

Abstract:
A process of producing a BCl.sub.3 /inert gas vapor stream from a low purity BCl.sub.3 source, the BCl.sub.3 /inert gas vapor stream having less than 10 ppm chlorine and less than 10 ppm phosgene impurities, the process comprising:a) injecting an inert gas into a container comprising low purity BCl.sub.3 having phosgene impurity and a vapor pressure to produce a vapor stream comprising BCl.sub.3, inert gas, and phosgene;b) decomposing a major portion of the phosgene in the vapor stream comprising BCl.sub.3, inert gas, and phosgene by heating to a first temperature to form a first intermediate vapor stream comprising BCl.sub.3, inert gas, carbon monoxide, chlorine and less than 10 ppm phosgene; andc) adsorbing a major portion of the chlorine in the first intermediate vapor stream at a temperature lower than the first temperature using a solid adsorbent material, thereby producing said BCl.sub.3 /inert gas vapor stream having less than 10 ppm chlorine and 10 ppm phosgene.