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US 5,672,747 AGranted
Phosgene process
OwnerJohn E. Staufferinventor
Life of this patent
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Abstract
A process for the production of phosgene (COCl.sub.2) comprising first reacting perchloroethylene (CCl.sub.2 .dbd.CCl.sub.2) with hydrogen chloride and oxygen in the presence of a first catalyst to give hexachloroethane and water, separating the hexachloroethane, and second reacting the hexachloroethane from the first step with carbon monoxide in the presence of a second catalyst to produce perchloroethylene and phosgene which is separated from the perchloroethylene before the latter is recycled to the first step.
Claims6
A process for the production of phosgene comprising the following steps operated in tandem:
- first, reacting perchloroethylene with hydrogen chloride and oxygen in the presence of a first catalyst to give hexachloroethane and water, separating the hexachloroethane, and
- second, reacting the hexachloroethane from the first step with carbon monoxide in the presence of a second catalyst to produce perchloroethylene and phosgene which is separated from the perchloroethylene before the latter is recycled to the first step.
Dependencies are inferred from the claim text.