US2744147A
Expired / Lapsed
US
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Fluorination of haloalkanes with a catalyst containing gamma alumina
Assignee: Dow Chemical Co
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Filing: 1952-02-04
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Granted: 1956-05-01
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Expires: 1972-02-04
Abstract
No abstract record available.
Inventors
- 👤 Warren N Milks
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 01:45
CPC Classifications
C; C07; C07C; C07C17/00; C07C17/093; C07C17/20; C07C17/202; C07C17/206; B; B01; B01J; B01J27/00; B01J27/06
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
125 words
A METHOD OF FLUORINATING HALOALKANES WHICH COMPRISES PASSING A VAPOR MIXTURE OF A HALOALKANE HAVING FROM ONE TO TWO CARBON ATOMS, INCLUDING AT LEAST ONE CARBON ATOM ATTACHED TO A MINIMUM OF TWO HALOGENS OF ATOMIC NUMBER NOT GREATER THAN 35, AT LEAST ONE OF WHICH IS OF ATOMIC NUMBER FROM 17 THROUGH 35 INCLUSIVE, AND AT LEAST AN EQUIMOLAR PROPORTION OF HYDROGEN FLUORIDE AT A REACTION TEMPERATURE GREATER THAN 180* C. THROUGH A BED OF A CATALYST CONSISTING ESSENTIALLY OF A HALIDE OF AT LEAST ONE METAL OF THE GROUP CONSISTING OF COBALT, NICKEL, AND CHROMIUM IMPREGNATED ON AN ACTIVATED ALUMINA WHICH ALWAYS CONTAINS GAMMA ALUMINA AND CONSISTS PREPONDERANTLY OF AT LEAST ONE MEMBER OF THE GROUP CONSISTING OF GAMMA, CHI, AND KAPPA ALUMINA.
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) | 1959-05-01 | 1959-10-31 | 1960-05-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-05-01 | 1963-10-31 | 1964-05-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-05-01 | 1967-10-31 | 1968-05-01 | $7700.00 | Window Closed / Lapsed |