Purification of 1,1-dichloro-1-fluoroethane
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United States of America Patent
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Mar 21, 1995
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app pub date -
Nov 29, 1993
filing date -
Sep 12, 1989
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Abstract
This invention relates to a process for the purification of 1,1-dichloro-1-fluorethane. To remove unsaturated impurities such as 1,1-dichloroethylene and dichloracetylene the crude 1,1-dichloro-1-fluoroethane is subjected to the action of chlorine and/or of a hydracid. This treatment is carried out in the presence of a Lewis acid, or, only in the case of chlorine, by photochemical catalysis.
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