US5532419A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Processes for the preparation of fluorinated olefins and hydrofluorocarbons using fluorinated olefin
Assignee: Honeywell International Inc
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Filing: 1995-09-15
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Granted: 1996-07-02
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Expires: 2015-09-15
Abstract
Abstract The invention relates to a cost effective and convenient process for the manufacture of fluorinated olefins of the formula RCF 2 CH═CH 2 where R is C x Cl y F z and y+z=2x+1. The invention is also directed to a practical process for converting these olefins to hydrofluorocarbons via the catalyzed fluorination with hydrogen fluoride. Hydrofluorocarbons produced via this process have application as solvents among other uses.
Inventors
- 👤 Michael Van Der Puy
- 👤 G. V. Bindu Madhavan
- 👤 Alagappan Thenappan
- 👤 Hsueh S. Tung
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 00:49
CPC Classifications
C; C07; C07C; C07C21/00; C07C21/02; C07C21/18; C07C17/00; C07C17/07; C07C17/087; C07C17/25; C07C17/26; C07C17/272; C07C17/275
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
95 words
A process for preparing a hydrofluorocarbon comprising: a) reacting a compound of the formula RCF 2 CH═CH 2 where R is C x Cl y F z and y+z=2x+1 with hydrogen fluoride in the presence of an antimony (V) halide catalyst under conditions sufficient to produce a compound of the formula RCF 2 CH 2 CH 2 F where R is C x Cl y F z and y+z=2x+1; and b) recovering a compound of the formula RCF 2 CH 2 CH 2 F where R is C x Cl y F z and; y+z=2x+1.
Claim 2
Dependent Claim
95 words
A process for preparing a hydrofluorocarbon comprising: a) reacting a compound of the formula RCF 2 CH═CH 2 where R is C x Cl y F z and y+z=2x+1 with hydrogen fluoride in the presence of an antimony (V) halide catalyst under conditions sufficient to produce a compound of the formula RCF 2 CH 2 CH 2 F where R is C x Cl y F z and y+z=2x+1; and b) recovering a compound of the formula RCF 2 CH 2 CH 2 F where R is C x Cl y F z and; y+z=2x+1.
Claim 3
Dependent Claim
34 words
The process of claim 1 wherein said compound of the formula RCF 2 CH═CH 2 where R is C x Cl y F z and y+z=2x+1 is CF 3 CF 2 CH═CH 2 .
Claim 4
Dependent Claim
11 words
The process of claim 1 wherein said hydrogen fluoride is anhydrous.
Claim 5
Dependent Claim
11 words
The process of claim 2 wherein said hydrogen fluoride is anhydrous.
Claim 6
Dependent Claim
29 words
The process of claim 1 wherein said antimony (V) halide is selected from the group consisting of antimony (V) halides, antimony mixed halides or mixtures of antimony (V) halides.
Claim 7
Dependent Claim
14 words
The process of claim 4 wherein said antimony (V) halide is antimony (V) pentachloride.
Claim 8
Dependent Claim
30 words
The process of claim 1 wherein the stoichiometric molar ratio of HF:RCF 2 CH═CH 2 where R is C x Cl y F z and y+z=2x+1 is from about 10-20:1.
Claim 9
Dependent Claim
30 words
The process of claim 6 wherein the stoichiometric molar ratio of HF:RCF 2 CH═CH 2 where R is C x Cl y F z and y+z=2x+1 is from about 10-20:1.
Claim 10
Dependent Claim
45 words
The process of claim 1 wherein said conditions sufficient to produce a compound of the formula RCF 2 CH 2 CH 2 F where R is C x Cl y F z and y+z=2x+1 are a temperature of from about -20° to about 20° C.
Claim 11
Dependent Claim
45 words
The process of claim 8 wherein said conditions sufficient to produce a compound of the formula RCF 2 CH 2 CH 2 F where R is C x Cl y F z and y+z=2x+1 are a temperature of from about -5° to about 5° C.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1999-07-02 | 2000-01-01 | 2000-07-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2003-07-02 | 2004-01-01 | 2004-07-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2007-07-02 | 2008-01-01 | 2008-07-02 | $7700.00 | Window Closed / Lapsed |