Patent US2744148A successfully refreshed from Google Patents.
US2744148A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for fluorination of haloalkanes using a hydrogen fluoride activated catalyst containing alumina, a metal fluoride and basic aluminum fluoride
Assignee: Dow Chemical Co
•
Filing: 1952-02-04
•
Granted: 1956-05-01
•
Expires: 1972-02-04
Abstract
No abstract record available.
Inventors
- 👤 Robert P Ruh
- 👤 Ralph A Davis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 15:41
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: 2
Claim 1
Independent Claim
132 words
A METHOD OF FLUORINATING HALOALKANES WHICH COMPRISES PASSING A VAPOR MIXTURE OF A HALOALKANE HAVING FROM 1 TO 2 CARBON ATOMS, INCLUDING AT LEAST ONE CARBON ATOM ATTACHED TO A MINIMUN OF TWO HALOGENS OF ATOMIC NUMBER NOT GREATER THAN 35, AT LEST ONE OF WHICH IS OF ATOMIC NUMBER FROM 17 THROUGH 35 INCLUSIVE, AND AT LEAST AN EQUIMOLAR PROPROTION OF HYDROGEN FLUROIDE AT A REACTION TEMPERATURE IN THE RANGE OF 150* TO 500* C. THROUGH A BED OF A CATALYST CONSISTING ESSENTIALLY OF AT LEAST FIVE PERCENT BY WEIGHT OF A BASIC ALUMINUM FLUORIDE AND AT LEAST ONE MEMBER OF THE GROUP CONSISTING OF ALUMINA, ALIMINA HYDRATE, AND ALUMINUM FLUORIDE PROMOTED WITH AT LEAST ONE HALIDE OF A METAL OF THE GROUP CONSISTING OF CHROMIUM, COBLAT, NICKEL, COPPER, AND PALLADIUM.
Claim 2
Independent Claim
132 words
A METHOD OF FLUORINATING HALOALKANES WHICH COMPRISES PASSING A VAPOR MIXTURE OF A HALOALKANE HAVING FROM 1 TO 2 CARBON ATOMS, INCLUDING AT LEAST ONE CARBON ATOM ATTACHED TO A MINIMUN OF TWO HALOGENS OF ATOMIC NUMBER NOT GREATER THAN 35, AT LEST ONE OF WHICH IS OF ATOMIC NUMBER FROM 17 THROUGH 35 INCLUSIVE, AND AT LEAST AN EQUIMOLAR PROPROTION OF HYDROGEN FLUROIDE AT A REACTION TEMPERATURE IN THE RANGE OF 150* TO 500* C. THROUGH A BED OF A CATALYST CONSISTING ESSENTIALLY OF AT LEAST FIVE PERCENT BY WEIGHT OF A BASIC ALUMINUM FLUORIDE AND AT LEAST ONE MEMBER OF THE GROUP CONSISTING OF ALUMINA, ALIMINA HYDRATE, AND ALUMINUM FLUORIDE PROMOTED WITH AT LEAST ONE HALIDE OF A METAL OF THE GROUP CONSISTING OF CHROMIUM, COBLAT, NICKEL, COPPER, AND PALLADIUM.
References Cited (Backward Citations)
US2381562A
Cited
US2458551A
Cited
US2478201A
Cited
US2478932A
Cited
US2471525A
Cited
US2574480A
Cited
US2594706A
Cited
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 |