Solvents containing dichlorotetrafluoropropane
AssigneeDaikin Industries, Ltd.
InventorsKohji Tamura, Yukio Omure, Satoshi Ide
Life of this patent
Estimating the term…
Abstract
Solvents or solvent compositions comprising HCFC-234. The solvents can be used, instead of CFC-113, as solvents, diluents, cleaning agents, drying agents or dispersing agents. The solvent compositions of HCFC-234 with an aliphatic alcohol having 1 to 4 carbon atoms or with cyclohexane can give azeotropic compositions.
Claims6
An azeotropic composition consisting essentially of 86.5-87.5% 1,3-dichloro-2,2,3,3-tetrafluoropropane and 13.5-12.5% methanol, respectively, having a boiling point of about 54.6.degree. C. at normal pressure.
An azeotropic composition consisting essentially of 89.5-90.9% 1,3,-dichloro-2,2,3,3-tetrafluoropropane and 10.5-9.5% ethanol, respectively, having a boiling point of about 61.8.degree. C. at normal pressure.
An azeotropic composition consisting essentially of 90.5-91.5% 1,3,-dichloro-2,2,3,3-tetrafluoropropane and 9.5-8.5% isopropanol, respectively, having a boiling point of about 65.0.degree. C. at normal pressure.
An azeotropic composition consisting essentially of 96.5-97.5% 1,3,-dichloro-2,2,3,3-tetrafluoropropane and 3.5-2.5% n-propanol, respectively, having a boiling point of about 66.9.degree. C. at normal pressure.
An azeotropic composition consisting essentially of 92.5-93.5% 1,3-dichloro-2,2,3,3-tetrafluoropropane and 7.5-6.5% tert-butanol, respectively, having a boiling point of about 66.5.degree. C. at normal pressure.
An azeotropic composition consisting essentially of 85.0-86.0% 1,3-dichloro-2,2,3,3-tetrafluoropropane and 15.0-14.0% cyclohexane, respectively, having a boiling point of about 67.5.degree. C. at normal pressure.
Dependencies are inferred from the claim text.