Azeotropes of 1,2-dichloro-1,1,2-trifluoroethane
AssigneePhillips Petroleum Company
InventorsWilliam Milton Hutchinson, deceased, by Florence M. Hutchinson, exectrix
Life of this patent
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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.
Claims4
A substantially constant boiling admixture of (A) 1,2-dichloro-1,1,2-trifluoroethane, (B) 1,2-dibromo-1,1,2,2-tetrafluoroethane and (C) diethyl ether, which at substantially atmospheric pressure is characterized as about 53-54 weight percent 1,2-dichloro-1,1,2-trifluoroethane, about 11-12 weight percent 1,2-dibromo-1,1,2,2-tetrafluoroethane, and about 35-36 weight percent diethyl ether.
The azeotropic composition according to clain 3 further characterized by a weight percentage relationship of about 53.3 weight percent (A), 11.2 weight percent (B), 35.5 weight percent (C).
Dependencies are inferred from the claim text.