US5202509A
Expired / Lapsed
US
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Catalysts for liquid phase fluorination
Assignee: Arkema France SA
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Filing: 1992-05-20
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Granted: 1993-04-13
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Expires: 2012-05-20
Abstract
Abstract The catalysts according to the invention are mixtures of an antimony trihalide and of a titanium tetrahalide. These catalysts can be used for the liquid phase fluorination of halogenated aliphatic hydrocarbons, especially that of chlorinated ethane and ethylene derivatives.
Inventors
- 👤 Charles Laviron
- 👤 Andre Lantz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 16:10
CPC Classifications
C; C07; C07C; C07C17/00; C07C17/093; C07C17/20; C07C17/21; B; B01; B01J; B01J27/00; B01J27/06; B01J27/135; C07C17/202; C07C17/206
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
54 words
Process for liquid phase fluorination of a halogenated hydrocarbon using hydrofluoric acid comprising fluorinating a halogenated hydrocarbon by contacting the halogenated hydrocarbon with a reactant mixture consisting of hydrofluoric acid and a catalyst consisting of a mixture of an antimony trihalide and of a titanium tetrahalide wherein the antimony remains in the trivalent state.
Claim 2
Dependent Claim
54 words
Process for liquid phase fluorination of a halogenated hydrocarbon using hydrofluoric acid comprising fluorinating a halogenated hydrocarbon by contacting the halogenated hydrocarbon with a reactant mixture consisting of hydrofluoric acid and a catalyst consisting of a mixture of an antimony trihalide and of a titanium tetrahalide wherein the antimony remains in the trivalent state.
Claim 3
Dependent Claim
19 words
Process according to claim 1, wherein the fluorination is carried out at a temperature between 40° and 180° C.
Claim 4
Dependent Claim
16 words
Process according to claim 1, wherein fluorination is carried out in an autoclave under autogenous pressure.
Claim 5
Dependent Claim
30 words
Process according to claim 1, wherein fluorination is carried out continuously at a pressure which is at least equal to that needed to keep the reaction mixture in liquid phase.
Claim 6
Dependent Claim
24 words
Process according to claim 1, wherein the molar ratio of the Sb+Ti catalyst to the compound to be fluorinated is between 0.1 and 0.6.
Claim 7
Dependent Claim
18 words
Process according to claim 1, in which the molar ratio HF/compound to be fluorinated is greater than 1.
Claim 8
Dependent Claim
21 words
Process according to claim 1, wherein the halogenated hydrocarbon to be fluorinated is a chlorinated derivative of ethane or of ethylene.
Claim 9
Dependent Claim
14 words
Process according to claim 5, wherein the molar ratio is between 0.2 and 0.4.
Claim 10
Dependent Claim
14 words
Process according to claim 6, wherein the molar ratio is between 5 and 20.
Claim 11
Dependent Claim
26 words
Process according to claim 1, wherein the molar proportion of antimony trihalide is between 10 and 70% and that of titanium tetrahalide between 90 and 30%.
Claim 12
Dependent Claim
17 words
Process according to claim 1, wherein the molar proportion of titanium tetrahalide is between 50 and 90%.
Claim 13
Dependent Claim
16 words
Process according to claim 1, consisting of a mixture of antimony trifluoride and of titanium tetrafluoride.
Claim 14
Dependent Claim
22 words
Process according to claim 1, wherein the catalyst is obtained by fluorination of a mixture of antimony trichloride and of titanium tetrachloride.
Claim 15
Dependent Claim
26 words
Process according to claim 1, wherein the fluorination of the mixture of chlorides is carried out at the same time as that of a halogenated hydrocarbon.
References Cited (Backward Citations)
DE1041026B
Cited
US3324126A
Cited
GB1178284A
Cited
FR2388785A1
Cited
US4374289A
Cited
US4623491A
Cited
US4792643A
Cited
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) | 1996-04-12 | 1996-10-12 | 1997-04-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-04-12 | 2000-10-12 | 2001-04-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-04-12 | 2004-10-12 | 2005-04-13 | $7700.00 | Window Closed / Lapsed |