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US4997589A
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Azeotrope-like compositions of 1,2-difluoroethane and dichlorotrifluoroethane
Assignee: Honeywell International Inc
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Filing: 1989-12-15
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Granted: 1991-03-05
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Expires: 2009-12-15
Abstract
Abstract Novel azeotrope-like compositions comprising 1,2-difluoroethane and dichlorotrifuoroethane which are useful in a variety of industrial applications including refrigerant applications, solvent applications, and blowing agent applications.
Inventors
- 👤 Earl E. A. Lund
- 👤 Ian R. Shankland
- 👤 Ellen L. Swan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 18:29
CPC Classifications
C; C09; C09K; C09K5/00; C09K5/02; C09K5/04; C09K5/041; C09K5/044; C09K5/045; C11; C11D; C11D7/00; C11D7/50; C11D7/5036; C11D7/504; C11D7/5045; C23; C23G; C23G5/00; C23G5/02; C23G5/028; C23G5/02809; C23G5/02825; C23G5/02829; C23G5/02838; C09K2205/00; C09K2205/10; C09K2205/12; C09K2205/122; C09K2205/32
Claims Analysis
Total Claims: 25
Claim 1
Independent Claim
34 words
The azeotrope-like compositions consisting essentially of from about 50 to about 95 weight percent 1,1-dichloro-2,2,2-trifluoroethane and from about 5 to about 50 weight percent 1,2-difluoroethane and-boil at about 26.1° C. at 760 mm Hg.
Claim 2
Dependent Claim
34 words
The azeotrope-like compositions consisting essentially of from about 50 to about 95 weight percent 1,1-dichloro-2,2,2-trifluoroethane and from about 5 to about 50 weight percent 1,2-difluoroethane and-boil at about 26.1° C. at 760 mm Hg.
Claim 3
Dependent Claim
41 words
The azeotrope-like compositions of claim 1 wherein said compositions consist of essentially from about 70 to about 90 weight percent 1,1-dichloro-2,2,2-trifluoroethane and from about 10.0 to about 30.0 weight percent 1,2-difluoroethane and boil at about 26.1° C. at 760 mm Hg.
Claim 4
Dependent Claim
33 words
The azeotrope-like compositions of claim 1 wherein said compositions consist essentially of about 78 weight percent 1,1-dichloro-2,2,2-trifluoroethane and about 22 weight percent 1,2-difluoroethane and boil at about 26.1° C. at 760 mm Hg.
Claim 5
Dependent Claim
41 words
Azeotrope-like compositions of claim 3 wherein said compositions consist consisting essentially of from about 50 to about 80 weight percent 1,2-dichloro-1,1,2-trifluoroethane and from about 20 to about 50.0 weight percent 1,2-difluoroethane and boil at about 27.2° C. at 760 mm Hg.
Claim 6
Dependent Claim
41 words
The azeotrope-like compositions of claim 4 wherein said compositions consist essentially of from about 60 to about 80.0 weight percent 1,2-dichloro-1,1,2-trifluoroethane and from about 20.0 to about 40.0 weight percent 1,2-difluoroethane and boil at about 27.2° C. at 760 mm Hg.
Claim 7
Dependent Claim
33 words
The azeotrope-like compositions of claim 4 wherein said compositions consist essentially of about 68 weight percent 1,2-dichloro-1,1,2-trifluoroethane and about 32 weight percent 1,2-difluoroethane and boil at about 27.2° C. at 760 mm Hg.
Claim 8
Dependent Claim
40 words
Azeotrope-like compositions consisting essentially of from about 50 to about 95 weight percent of a mixture of 1,1-dichloro-2,2,2-trifluoroethane and 1,2-dichloro-1,1,2-trifluoroethane and from about 5 to about 50 weight percent 1,2-difluoroethane and boil at about 25.4° C. at 760 mm Hg.
Claim 9
Dependent Claim
40 words
Azeotrope-like compositions consisting essentially of from about 50 to about 95 weight percent of a mixture of 1,1-dichloro-2,2,2-trifluoroethane and 1,2-dichloro-1,1,2-trifluoroethane and from about 5 to about 50 weight percent 1,2-difluoroethane and boil at about 25.4° C. at 760 mm Hg.
Claim 10
Dependent Claim
46 words
The azeotrope-like compositions of claim 7 wherein said compositions consist essentially from about 70 to about 90 weight percent of a mixture of 1,1-dichloro-2,2,2-trifluoroethane and 1,2-dichloro-1,1,2-trifluoroethane and from about 10 to about 30 weight percent 1,2-difluoroethane and boil at about 25.4° C. at 760 mm Hg.
Claim 11
Dependent Claim
42 words
Azeotrope-like compositions consisting essentially of from about 50 to about 95 weight percent of a mixture of 1,1-dichloro 2,2,2-trifluoroethane and 1,2-dichloro-1,1,2-trifluoroethane and from about 5 to about 50 weight percent 1,2-difluoroethane and boil at about 25.4° C.±0.8° C. at 760 mm Hg.
Claim 12
Dependent Claim
42 words
Azeotrope-like compositions consisting essentially of from about 50 to about 95 weight percent of a mixture of 1,1-dichloro 2,2,2-trifluoroethane and 1,2-dichloro-1,1,2-trifluoroethane and from about 5 to about 50 weight percent 1,2-difluoroethane and boil at about 25.4° C.±0.8° C. at 760 mm Hg.
Claim 13
Dependent Claim
36 words
The azeotrope-like compositions of claim 7 wherein said compositions consist essentially of from about 50 to about 90 weight percent of a mixture of 1,1-dichloro-2,2,2-trifluoroethane and 1,2-dichloro-1,1,2-trifluoroethane and from about 10 to about 50 weight 1,2-difluoroethane.
Claim 14
Dependent Claim
27 words
A method for producing cooling comprising condensing the refrigerant composition of claim 1 and thereafter evaporating said composition in the vicinity of a body to be cooled.
Claim 15
Dependent Claim
27 words
A method for producing cooling comprising condensing the refrigerant composition of claim 4 and thereafter evaporating said composition in the vicinity of a body to be cooled.
Claim 16
Dependent Claim
27 words
A method for producing cooling comprising, condensing the refrigerant composition of claim 7 and thereafter evaporating said composition in the vicinity of a body to be cooled.
Claim 17
Dependent Claim
27 words
A method for producing heating comprising condensing the refrigerant composition of claim 1 in the vicinity of a body to be heated and thereafter evaporating said composition.
Claim 18
Dependent Claim
27 words
A method for producing heating comprising condensing the refrigerant composition of claim 4 in the vicinity of a body to be heated and thereafter evaporating said composition.
Claim 19
Dependent Claim
27 words
A method for producing heating comprising condensing the refrigerant composition of claim 7 in the vicinity of a body to be heated and thereafter evaporating said composition.
Claim 20
Dependent Claim
37 words
A method for preparing polyurethane and polyisocyanurate foams comprising reacting and foaming a mixture of ingredients which will react to form the polyurethane and polyisocyanurate foams in the presence of a blowing agent composition of claim 1.
Claim 21
Dependent Claim
37 words
A method for preparing polyurethane and polyisocyanurate foams comprising reacting and foaming a mixture of ingredients which will react to form the polyurethane and polyisocyanurate foams in the presence of a blowing agent composition of claim 4.
Claim 22
Dependent Claim
36 words
A method for preparing polyurethane and polyisocyanurate foams comprising reacting and foaming a mixture of ingredients which will react to form the polyurethane and polyisocyanurate foams/in the presence of a blowing agent composition of claim 7.
Claim 23
Dependent Claim
18 words
A method of cleaning a solid surface comprising treating said surface with an azeotrope-like composition of claim 1.
Claim 24
Dependent Claim
18 words
A method of cleaning a solid surface comprising treating said surface with an azeotrope-like composition of claim 4.
Claim 25
Dependent Claim
18 words
A method of cleaning a solid surface comprising treating said surface with an azeotrope-like composition of claim 7.
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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) | 1994-03-04 | 1994-09-03 | 1995-03-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-03-04 | 1998-09-03 | 1999-03-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-03-04 | 2002-09-03 | 2003-03-05 | $7700.00 | Window Closed / Lapsed |