Method for purifying perchloroethylene containing dichlorobutadiene
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United States of America Patent
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Mar 24, 1998
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app pub date -
Jan 3, 1997
filing date -
Jan 3, 1997
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Abstract
Perchloroethylene containing contaminating amounts of dichlorobutadiene is treated with bromine, e.g., elemental bromine, in the presence of a free-radical initiator, thereby to produce perchloroethylene substantially-free of dichlorobutadiene and without significant loss of perchloroethylene. A bromine scavenger, e.g., trichloroethylene, can be added to the treated perchloroethylene to react with excess bromine that may be present in the perchloroethylene.
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