Azeotropic compositions of 1,1,2-trichlorotrifluoroethane with cis-1,2-dichloroethylene and n-propanol or isopropanol with or without nitromethane
US4936923A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 1, 1989 |
| Grant date | Jun 26, 1990 |
| Priority date | — |
| Expiry date | Mar 1, 2009 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC11D7/5081
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
Azeotropic mixture of 1,1,2-trichlorotrifluoroethane (CFC-113) with cis-1,2-dichloroethylene and n-propanol or isopropanol with or without nitromethane, the azeotropic mixtures being useful in solvent cleaning applications. One azeotrope-like "mixture contains about 88-96 weight percent 1,1,2-trichlorotrifluoroethane, about 4-10 weight percent cis-1,2-dichloroethylene and about 0.1-2.0 weight percent n-propanol and boils at about 47.degree. C. at essentially atmospheric pressure. A second azeotrope-like mixture contains about 87-97 weight percent 1,1,2-trichlorotrifluoroethane, about 2-8 weight percent cis-1,2-dichloroethylene and about 1-5 weight percent isopropanol and boils at about 45.degree. C. at essentially atmospheric pressure. A third azeotrope-like mixture contains about 88-98 weight percent 1,2,2-trichlorotrifluoroethane, about 1-7 weight percent cis-1,2-dichloroethylene, about 1-5 weight percent isopropanol and about 0.1-2.0 weight percent nitromethane.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.