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US 4,131,561 AGranted
Azeotropic compositions
AssigneePhillips Petroleum Company
InventorRobert E. Reusser
Life of this patent
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Abstract
This invention relates to azeotropic compositions of 1,2-dichloro-1-fluoroethane or of 1,2-dichloro-1,2-difluoroethane with certain alcohols, ethers, or ketones.
Claims6
The azeotrope which at substantially atmospheric pressure is characterized as about 39.8 weight per cent 1,2-dichloro-1,2-difluoroethane and about 60.2 weight per cent methyl ethyl ketone.
The azeotrope which at substantially atmospheric pressure is characterized as about 72.3 weight per cent 1,2-dichloro-1,2-difluoroethane and about 27.7 weight per cent acetone.
Dependencies are inferred from the claim text.