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US 3,940,342 AGranted
Azeotrope of 1,2-dichloro-1,1,2-trifluoroethane and trichlorofluoromethane
AssigneePhillips Petroleum Company
InventorWilliam M. Hutchinson
Life of this patent
Estimating the term…
Abstract
Constant boiling binary admixtures are formed by 1,2-dichloro-1,1,2-trifluoroethane with trichlorofluoromethane, with diethyl ether, and with dichloromethane. A constant boiling ternary admixture is formed by 1,2-dichloro-1,1,2-trifluoroethane, diethyl ether, and 1,2-dibromo-1,1,2,2-tetrafluoroethane.
Claims5
The substantially constant boiling admixture of (A) 1, 2 -dichloro- 1, 1, 2-trifluoroethane and (B) trichlorofluoromethane which at substantially atmospheric pressure is characterized as about 28-29 weight percent (A) and about 72-71 weight percent (B).
Dependencies are inferred from the claim text.