Azeotrope-like mixtures comprising heptafluorocyclopentane

Details Azeotrope-like mixtures comprising heptafluorocyclopentane Azeotrope-like mixtures comprising heptafluorocyclopentane

2007-12-07

2009-06-02

Mc Ginty, Douglas (Department: 1796)

Compositions

Vaporization, or expansion, refrigeration or heat or energy...

C252S068000, C252S069000, C252S364000, C510S177000, C510S408000, C510S415000

Reexamination Certificate

active

07540973

ABSTRACT:
Disclosed is an azeotrope-like composition comprising: from about 2% by weight to about 50% by weight of a hydrofluorocarbon selected from the group consisting of 1,1,1,2,2,3,4,5,5,5-decafluoropentane and 1,1,1,3,3-pentafluorobutane, from about 2% by weight to about 50% by weight 1,1,2,2,3,3,4-heptafluorocyclopentane, and an amount effective in dissolving oils and contaminants of trans-1,2-dichloroethylene. In another embodiment, are fluorocarbon solvent composition comprising from about 15 to about 99 weight percent 1,1,1,2,2,3,4,5,5,5-decafluoropentane and from about 85 to about 1 percent by weight 1,1,2,2,3,3,4-heptafluorocyclopentane wherein the freezing point of the composition is less than 0° C.

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