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US4584122A
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Azeotrope-like compositions of trichlorotrifluoroethane, ethanol, nitromethane and 2-methylpentane or a mixture of hexanes
Assignee: Honeywell International Inc
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Filing: 1984-11-28
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Granted: 1986-04-22
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Expires: 2004-11-28
Abstract
Abstract Azeotrope-like compositions comprising trichlorotrifluoroethane, ethanol, nitromethane and 2-methylpentane or a mixture of hexanes which are stable and have utility as degreasing agents and as solvents in a variety of industrial cleaning applications.
Inventors
- 👤 Rajat S. Basu
- 👤 Earl A. E. Lund
- 👤 Hang T. Pham
- 👤 David P. Wilson
- 👤 Hillel Magid
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 16:20
CPC Classifications
C; C11; C11D; C11D7/00; C11D7/50; C23; C23G; C23G5/00; C23G5/02; C23G5/028; C23G5/02809; C23G5/02812; C23G5/02816; C23G5/02819; C11D7/5036; C11D7/5068; C11D7/509
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
40 words
Azeotrope-like compositions comprising trichlorotrifluoroethane, ethanol, nitromethane, and a hexane which is 2-methylpentane or a mixture of hexanes containing at least about 6.5 weight percent of at least two hexane isomers based on the total hexane content of the azeotrope-like composition.
Claim 2
Dependent Claim
40 words
Azeotrope-like compositions comprising trichlorotrifluoroethane, ethanol, nitromethane, and a hexane which is 2-methylpentane or a mixture of hexanes containing at least about 6.5 weight percent of at least two hexane isomers based on the total hexane content of the azeotrope-like composition.
Claim 3
Dependent Claim
11 words
Azeotrope-like compositions according to claim 1 wherein said trichlorotrifluoroethane is 1,1,2-trichloro-1,2,2-trifluoroethane.
Claim 4
Dependent Claim
15 words
Azeotrope-like compositions according to claim 2 wherein said mixture of hexanes is 2-methylpentane and 2,3-dimethylbutane.
Claim 5
Dependent Claim
14 words
Azeotrope-like compositions according to claim 2 wherein said mixture of hexanes is commercial isohexane.
Claim 6
Dependent Claim
16 words
Azeotrope-like compositions according to claim 2 wherein said mixture of hexanes is 2,3-dimethylbutane and commercial isohexane.
Claim 7
Dependent Claim
19 words
Azeotrope-like compositions according to claim 2 wherein said mixture of hexanes is 2,2-dimethylbutane, 2-methylpentane, 3-methylpentane, 2,3-dimethylbutane and and n-hexane.
Claim 8
Dependent Claim
48 words
Azeotrope-like compositions according to claim 2 comprising from about 87.3 to about 93.7 weight percent 1,1,2-trichloro-1,2,2-trifluoroethane, from about 2.2 to about 4.9 weight percent ethanol, from about 0.8 to about 1.9 weight percent nitromethane and from about 0.2 to about 7.5 weight percent of a mixture of hexanes.
Claim 9
Dependent Claim
53 words
Azeotrope-like compositions according to claim 7 wherein said weight percent of 1,1,2-trichloro-1,2,2-trifluoroethane is from about 89.2 to about 90.5, said weight percent ethanol is from about 3.0 to about 3.8, weight percent nitromethane is from about 0.8 to about 1.5, said weight percent mixture of hexanes is from about 5.0 to about 6.0.
Claim 10
Dependent Claim
14 words
Azeotrope-like compositions according to claim 8 wherein said mixture of hexanes is commercial isohexane.
Claim 11
Dependent Claim
21 words
The method of cleaning a solid surface which comprises treating said surface with an azeotrope-like composition as defined in claim 1.
Claim 12
Dependent Claim
21 words
The method of cleaning a solid surface which comprises treating said surface with an azeotrope-like composition as defined in claim 2.
Claim 13
Dependent Claim
21 words
The method of cleaning a solid surface which comprises treating said surface with an azeotrope-like composition as defined in claim 6.
Claim 14
Dependent Claim
21 words
The method of cleaning a solid surface which comprises treating said surface with an azeotrope-like composition as defined in claim 9.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-04-21 | 1989-10-21 | 1990-04-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-04-21 | 1993-10-21 | 1994-04-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-04-21 | 1997-10-21 | 1998-04-22 | $7700.00 | Window Closed / Lapsed |