US4877545A
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Azeotropic compositions of 1,1,2-trichlorotrifluoroethane and trans-1,2-dichloroethylene with ethanol, N-propanol, isopropanol and acetone or with ethanol or acetone and nitromethane
Assignee: EIDP Inc
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Filing: 1988-12-29
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Granted: 1989-10-31
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Expires: 2008-12-29
Abstract
Abstract Azeotropic mixtures of 1,1,2-trichlorotrifluoroethane (CFC-113) with trans-1,2-dichloroethylene and ethanol, n-propanol, isopropanol or acetone. Also, Azeotropic mixtures of 1,1,2-trichlorotrifluoroethane (CFC-113), trans-1,2-dichloroethylene and ethanol or acetone with nitromethane are disclosed. The azeotropic mixtures are useful in solvent cleaning applications.
Inventors
- 👤 Abid N. Merchant
- 👤 Robert A. Gorski
- 👤 Kenneth C. Burke
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 09:21
CPC Classifications
C; C11; C11D; C11D7/00; C11D7/50; C11D7/5036; C11D7/5068; C11D7/5077; C11D7/5081; C11D7/5086; H; H05; H05K; H05K3/00; H05K3/22; H05K3/26
Claims Analysis
Total Claims: 28
Claim 1
Independent Claim
66 words
An azeotrope or azeotrope-like composition comprising consisting essentially of from about 58-77 weight percent 1,1,2-trichlorotrifluorethane, about 17-39 weight percent trans-1,2-dichloroethylene and an oxygenated compound selected from the group consisting of about 2-5 weight percent ethanol, about 0.1-2.0 weight percent n-propanol, about 1-5 weight percent isopropanol and about 4-8 weight percent acetone wherein the composition has a boiling point of about 42.6°-44.2° C., at 760 mm Hg.
Claim 2
Dependent Claim
66 words
An azeotrope or azeotrope-like composition comprising consisting essentially of from about 58-77 weight percent 1,1,2-trichlorotrifluorethane, about 17-39 weight percent trans-1,2-dichloroethylene and an oxygenated compound selected from the group consisting of about 2-5 weight percent ethanol, about 0.1-2.0 weight percent n-propanol, about 1-5 weight percent isopropanol and about 4-8 weight percent acetone wherein the composition has a boiling point of about 42.6°-44.2° C., at 760 mm Hg.
Claim 3
Dependent Claim
28 words
The azeotrope or azeotrope-like composition of claim 1, wherein the composition is about 60-70 weight percent 1,1,2-trichlorotrifluoroethane, about 27-35 weight percent trans-1,2-dichloroethylene and about 2-5 weight percent ethanol.
Claim 4
Dependent Claim
29 words
The azeotrope or azeotrope-like composition of claim 2, wherein the composition is about 65.37 weight percent 1,1,2-trichlorotrifluoroethane, and about 31.30 weight percent trans-1,2-dichloroethylene and about 3.33 weight percent ethanol.
Claim 5
Dependent Claim
23 words
The azeotrope or azeotrope-like composition of claim 3, wherein the composition has a boiling point of about 42.6° C., at substantially atmospheric pressure.
Claim 6
Dependent Claim
28 words
The azeotrope or azeotrope-like composition of claim 1, wherein the composition is about 58-68 weight percent 1,1,2-trichlorotrifluoroethane, about 33-39 weight percent trans-1,2-dichloroethylene and about 0.1-2.0 weight percent n-propanol.
Claim 7
Dependent Claim
28 words
The azeotrope or azeotrope-like composition of claim 5, wherein the composition is about 63.4 weight percent 1,1,2-trichlorotrifluoroethane, about 36.4 weight percent trans-1,2-dichloroethylene and about 0.2 weight percent n-propanol.
Claim 8
Dependent Claim
23 words
The azeotrope or azeotrope-like composition of claim 6, wherein the composition has a boiling point of about 44.2° C., at substantially atmospheric pressure.
Claim 9
Dependent Claim
28 words
The azeotrope or azeotrope-like composition of claim 1, wherein the composition is about 59-69 weight percent 1,1,2-trichlorotrifluoroethane, about 30-36 weight percent trans-1,2-dichloroethylene and about 1-5 weight percent isopropanol.
Claim 10
Dependent Claim
28 words
The azeotrope or azeotrope-like composition of claim 8, wherein the composition is about 64.8 weight percent 1,1,2-trichlorotrifluoroethane, about 33.2 weight percent trans-1,2-dichloroethylene and about 2.0 weight percent isopropanol.
Claim 11
Dependent Claim
23 words
The azeotrope or azeotrope-like composition of claim 9, wherein the composition has a boiling point of about 43.8° C., at substantially atmospheric pressure.
Claim 12
Dependent Claim
28 words
The azeotrope or azeotrope-like composition of claim 1, wherein the composition is about 67-77 weight percent 1,1,2-trichlorotrifluoroethane, about 17-24 weight percent trans-1,2-dichloroethylene and about 4-8 weight percent acetone.
Claim 13
Dependent Claim
28 words
The azeotrope or azeotrope-like composition of claim 11, wherein the composition is about 72.9 weight percent 1,1,2-trichlorotrifluoroethane, about 20.7 weight percent trans-1,2-dichloroethylene and about 6.4 weight percent acetone.
Claim 14
Dependent Claim
23 words
The azeotrope or azeotrope-like composition of claim 12, wherein the composition has a boiling point of about 43.9° C., at substantially atmospheric pressure.
Claim 15
Dependent Claim
21 words
A process for cleaning a solid surface which comprises treating said surface with the azeotrope or azeotrope-like compositions of claim 1.
Claim 16
Dependent Claim
19 words
The process of claim 14, wherein the solid surface is a printed circuit board contaminated with flux and flux-residues.
Claim 17
Dependent Claim
12 words
The process of claim 15, wherein the solid surface is a metal.
Claim 18
Dependent Claim
63 words
An azeotrope or azeotrope-like composition comprising consisting essentially of from about 58-77 weight percent 1,1,2- trichlorotrifluoroethane, about 17-39 weight percent trans- 1,2-dichloroethylene, about 0.01-1.0 weight percent nitromethane and an oxygenated compound selected from the group consisting of about 2-5 weight percent ethanol or about 4-8 weight percent acetone wherein the composition has a boiling point of about 42.6-44.2° C., at 760 mm Hg.
Claim 19
Dependent Claim
63 words
An azeotrope or azeotrope-like composition comprising consisting essentially of from about 58-77 weight percent 1,1,2- trichlorotrifluoroethane, about 17-39 weight percent trans- 1,2-dichloroethylene, about 0.01-1.0 weight percent nitromethane and an oxygenated compound selected from the group consisting of about 2-5 weight percent ethanol or about 4-8 weight percent acetone wherein the composition has a boiling point of about 42.6-44.2° C., at 760 mm Hg.
Claim 20
Dependent Claim
26 words
The azeotrope or azeotrope-like composition of claim 17, wherein the composition is about 60-70 weight percent 1,1,2-trichlorotrifluoroethane, about 27-34 weight percent trans-1,2-dichloroethylene, about 1-5 weight nitromethane.
Claim 21
Dependent Claim
35 words
The azeotrope or azeotrope-like composition of claim 18, wherein the composition is about 65.9 weight percent 1,1,2-trichlorotrifluoroethane, and about 30.6 weight percent trans-1,2-dichloroethylene, and about 3.5 weight percent ethanol and about 0.01 weight percent nitromethane.
Claim 22
Dependent Claim
23 words
The azeotrope or azeotrope-like composition of claim 19, wherein the composition has a boiling point of about 42.5° C., at substantially atmospheric pressure.
Claim 23
Dependent Claim
34 words
The azeotrope or azeotrope-like composition of claim 17, wherein the composition is about 69-79 weight percent 1,1,2-trichlorotrifluoroethane, about 16-22 weight percent trans-1,2 dichloroethylene, about 4-8 weight percent acetone and about 0.01-1.0 weight percent nitromethane.
Claim 24
Dependent Claim
33 words
The azeotrope or azeotrope-like composition of claim 21, wherein the composition is about 74.3 weight percent 1,1,2-trichlorotrifluoroethane, about 19.3 weight percent trans-1,2-dichloroethylene, about 6.4 weight percent acetone and about 0.02 weight percent nitromethane.
Claim 25
Dependent Claim
23 words
The azeotrope or azeotrope-like composition of claim 22, wherein the composition has a boiling point of about 44.0° C., at substantially atmospheric pressure.
Claim 26
Dependent Claim
21 words
A process for cleaning a solid surface which comprises treating said surface with the azeotrope or azeotrope-like compositions of claim 17.
Claim 27
Dependent Claim
19 words
The process of claim 24, wherein the solid surface is a printed circuit board contaminated with flux and flux-residues.
Claim 28
Dependent Claim
12 words
The process of claim 25, wherein the solid surface is a metal.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 1992-10-30 | 1993-05-01 | 1993-10-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-10-30 | 1997-05-01 | 1997-10-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-10-30 | 2001-05-01 | 2001-10-31 | $7700.00 | Window Closed / Lapsed |