Process for preparing 1,1,1-trifluoro-2,2-dichloroethane
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United States of America Patent
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May 30, 2006
Grant Date -
Feb 13, 2003
app pub date -
Aug 2, 2002
filing date -
Aug 3, 2001
priority date (Note) -
Expired
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Abstract
The invention relates to a process for preparing 1,1,1-trifluoro-2,2-dichloroethane (F123).This process consists in placing 1,1,1-trifluoro-2-chloroethane (F133a) in contact with chlorine in the presence of hydrogen fluoride and a fluorination catalyst.F133a may be obtained by fluorination of trichloroethylene, and the F123 may be subsequently fluorinated to F125.
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