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US4377715A
Expired / Lapsed
US
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Production of perfluoropropane
Assignee: Honeywell International Inc
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Filing: 1979-12-26
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Granted: 1983-03-22
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Expires: 1999-12-26
Abstract
Abstract Octafluoropropane or perfluoropropane is produced by introducing fluorine into an elongated inner zone surrounded by a porous member which is substantially resistant to fluorine corrosion and introducing a three carbon compound which is propane, a partially fluorinated propane, propene, a partially fluorinated propene, hexafluoropropene or mixtures thereof outside the porous member. When the porous member is metal, a perfluorinated diluent is used. When the porous member is fused alumina, conventional diluents such as nitrogen, or even no diluent may be employed.
Inventors
- 👤 Henry R. Nychka
- 👤 John B. Hino
- 👤 Richard E. Eibeck
- 👤 Martin A. Robinson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 18:20
CPC Classifications
C; C07; C07C; C07C17/00; C07C17/093; C07C17/10; B; B01; B01J; B01J12/00; B01J19/00; B01J19/24; B01J19/2415; C07B; C07B39/00; C07C17/013; C07C17/04; C07C41/00; C07C41/01; C07C41/18; C07C41/22; C07C45/00; C07C45/61; C07C45/63; C07C51/00; C07C51/58; C07C51/62; B01J2219/00; B01J2219/00049; B01J2219/00051; B01J2219/00054; B01J2219/00056; B01J2219/00058; B01J2219/00063; B01J2219/00069
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
86 words
A method of preparing octafluoropropane which comprises: (a) introducing a first gaseous reactant stream comprising fluorine into an elongated inner zone surrounded by porous member which is substantially resistant to fluorine corrosion; (b) introducing a second gaseous reactant stream outside the porous member comprising a three carbon compound selected from the group consisting of propane, propene and mixtures thereof; and (c) recovering octafluoropropane from the effluent outside the porous member; the pressure in the elongated inner zone being greater than the pressure outside the porous member.
Claim 2
Independent Claim
86 words
A method of preparing octafluoropropane which comprises: (a) introducing a first gaseous reactant stream comprising fluorine into an elongated inner zone surrounded by porous member which is substantially resistant to fluorine corrosion; (b) introducing a second gaseous reactant stream outside the porous member comprising a three carbon compound selected from the group consisting of propane, propene and mixtures thereof; and (c) recovering octafluoropropane from the effluent outside the porous member; the pressure in the elongated inner zone being greater than the pressure outside the porous member.
Claim 3
Dependent Claim
58 words
The method of claim 1 wherein the three carbon compound is propane and wherein said recovering step comprises condensing the effluent under sufficiently high pressure and low temperature to condense octafluoropropane, separating the condensate from the uncondensed portion of the effluent, separating an organic phase of the condensate and recovering octafluoropropane from the organic phase of the condensate.
Claim 4
Dependent Claim
19 words
The method of claim 2 wherein octafluoropropane is recovered from the organic phase of the condensate by fractional distillation.
Claim 5
Dependent Claim
20 words
The method of claim 1 wherein fluorine is introduced at between about 4 and 12 times the moles of propane.
Claim 6
Dependent Claim
21 words
The method of claim 4 wherein fluorine is introduced at between about 5 and about 10 times the moles of propane.
Claim 7
Dependent Claim
21 words
The method of claim 5 wherein fluorine is introduced at between about 8 and about 9.5 times the moles of propane.
Claim 8
Dependent Claim
12 words
the method of claim 1 wherein the three carbon compound is propene.
Claim 9
Dependent Claim
21 words
The method of claim 7 wherein fluorine is introduced at between about 3.5 and about 10.5 times the moles of propene.
Claim 10
Dependent Claim
21 words
The method of claim 8 wherein fluorine is introduced at between about 4 and about 8 times the moles of propene.
Claim 11
Dependent Claim
20 words
The method of claim 9 wherein fluorine is introduced at between about 7 and 8 times the moles of propene.
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) | 1986-03-21 | 1986-09-20 | 1987-03-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-03-21 | 1990-09-20 | 1991-03-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-03-21 | 1994-09-20 | 1995-03-22 | $7700.00 | Window Closed / Lapsed |