US3978145A
Expired / Lapsed
US
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Use of hexagonal chromium (111) oxide hydroxide catalyst in fluorination process
Assignee: EIDP Inc
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Filing: 1974-11-14
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Granted: 1976-08-31
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Expires: 1994-11-14
Abstract
Abstract An improved process for the reaction of halogenated aliphatic compounds with HF using hexagonal --CrOOH as the catalyst to produce fluorine containing aliphatic compounds.
Inventors
- 👤 Joachim F. Knaak
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 15:34
CPC Classifications
C; C07; C07C; C07C17/00; C07C17/093; C07C17/20; C07C17/21; B; B01; B01J; B01J23/00; B01J23/16; B01J23/24; B01J23/26; C07B; C07B39/00; C07C17/07; C07C17/087; C07C45/00; C07C45/61; C07C45/63
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
96 words
In the vapor phase reaction of a halogenated aliphatic compound containing halogen atoms other than fluorine, the compound containing from 1 to 8 carbon atoms in which adjacent carbon atoms are linked by one or two valence bonds and the compound being selected from halogenated aliphatic hydrocarbons, perhaloacetones, perhaloacetyl halides, perhaloacetonitriles and trihaloacetaldehydes, the compound being reacted with HF over a chromium (III) oxide catalyst at a temperature of about from 150° to 700°C. to produce halogenated aliphatic compounds containing increased numbers of fluorine atoms, the improvement wherein the catalyst is hexagonal chromium (III) oxide hydroxide.
Claim 2
Dependent Claim
96 words
In the vapor phase reaction of a halogenated aliphatic compound containing halogen atoms other than fluorine, the compound containing from 1 to 8 carbon atoms in which adjacent carbon atoms are linked by one or two valence bonds and the compound being selected from halogenated aliphatic hydrocarbons, perhaloacetones, perhaloacetyl halides, perhaloacetonitriles and trihaloacetaldehydes, the compound being reacted with HF over a chromium (III) oxide catalyst at a temperature of about from 150° to 700°C. to produce halogenated aliphatic compounds containing increased numbers of fluorine atoms, the improvement wherein the catalyst is hexagonal chromium (III) oxide hydroxide.
Claim 3
Dependent Claim
18 words
A process of claim 1 wherein the hexagonal chromium (III) oxide hydroxide is present on an inert support.
Claim 4
Dependent Claim
21 words
A process of claim 1 wherein the catalyst is present in the form of pellets and further comprises magnesium oxychloride binder.
Claim 5
Dependent Claim
15 words
A process of claim 1 wherein the halogenated aliphatic compound is a halogenated aliphatic hydrocarbon.
Claim 6
Dependent Claim
15 words
A process of claim 4 wherein the hydrocarbon is halogenated with chlorine and fluorine atoms.
References Cited (Backward Citations)
US3413363A
Cited
US3755477A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-08-31 | 1980-03-01 | 1980-08-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-08-31 | 1984-03-01 | 1984-08-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-08-31 | 1988-03-01 | 1988-08-31 | $7700.00 | Window Closed / Lapsed |