Purification of 1,1,1,2-tetrafluoroethane
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United States of America Patent
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Aug 22, 2000
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Nov 19, 1997
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Jul 8, 1992
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Abstract
A process for the removal of 1,1,2,2-tetrafluoroethane from 1,1,1,2-tetrafluoroethane which comprises contacting 1,1,1,2-tetrafluoroethane containing 1,1,2,2-tetrafluoroethane with a zeolite having a mean pore size in the range of 3.8 .ANG. an 4.8 .ANG.. The zeolite is preferably calcium chabazite.
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