Azeotrope-like mixtures comprising heptafluorocyclopentane
View Patent ↗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.
1. An azeotrope-like composition comprising from about from about 2% by weight to about 44% by weight 1,1,1,2,2,3,4,5,5,5-decafluoropentane, from about 2% by weight to about 50% by weight 1,1,2,2,3,3,4-heptafluorocyclopentane, and at least about 47% by weight trans-1,2-dichloroethylene.
2. The azeotrope-like composition of claim 1 wherein the composition comprises from about from about 2% by weight to about 35% by weight 1,1,1,2,2,3,4,5,5,5-decafluoropentane, from about 2% by weight to about 30% by weight 1,1,2,2,3,3,4-heptafluorocyclopentane, and from about 54% by weight to about 90% by weight trans-1,2-dichloroethylene.
3. The azeotrope-like composition of claim 1 wherein the composition comprises from about 5% by weight to about 20% by weight 1,1,1,2,2,3,4,5,5,5-decafluoropentane, from about 5% by weight to about 20% by weight 1,1,2,2,3,3,4-heptafluorocyclopentane, and from about 60% by weight to about 88% by weight trans-1,2-dichloroethylene.
4. An azeotrope-like composition comprising from about from about 10% by weight to about 50% by weight 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 at least about 41% by weight trans-1,2-dichloroethylene.
5. The azeotrope-like composition of claim 4 wherein the composition comprises from about from about 10% by weight to about 50% by weight 1,1,1,3,3-pentafluorobutane, from about 2% by weight to about 20% by weight 1,1,2,2,3,3,4-heptafluorocyclopentane, and from about 46% by weight to about 80% by weight trans-1,2-dichloroethylene.
6. The azeotrope-like composition of claim 1 further comprising from about 1% by weight to about 6% by weight of an alcohol.
7. The azeotrope-like composition of claim 6 wherein the alcohol is selected from the group consisting of methanol, ethanol, 1-propanol, 2-propanol and 2-methyl-2-propanol.
8. The azeotrope-like composition of claim 7 wherein the alcohol is 2-propanol.
9. The azeotrope-like composition of claim 6 wherein the composition comprises from about 2% by weight to about 25% by weight 1,1,1,2,2,3,4,5,5,5-decafluoropentane, from about 2% by weight to about 20% by weight 1,1,2,2,3,3,4-heptafluorocyclopentane, from about 60% by weight to about 90% by weight trans-1,2-dichloroethylene, and from about 2% by weight to about 5% by weight of an alcohol.