US2558703A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of trifluorotrichloropropene
Assignee: Occidental Chemical Corp
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Filing: 1948-01-06
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Granted: 1951-06-26
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Expires: 1968-01-06
Abstract
No abstract record available.
Inventors
- 👤 Carl I Gochenour
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 10:30
CPC Classifications
C; C07; C07C; C07C17/00; C07C17/093; C07C17/20; C07C17/202; C07C17/206
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
149 words
A PROCESS FOR THE PRODUCTION OF 1,1,1-TRIFLUORO-2,3,3-TRICHLORO-2,3-PROPENE WHICH COMPRISES PROGRESSIVELY ADDING ANHYDROUS HYDROGEN FLUORIDE TO A MIXTURE OF HEXACHLOROPROPENE CONTAINING SUSPENDED THEREIN AN AMOUNT OF PENTAVALENT ANTIMONY HALIDE WITHIN THE RANGE OF APPROXIMATELY 0.2 TO APPROXIMATELY 2.0 PERCENT BY WEIGTH OF THE HEXACHLOROPROPENE, PROGRESSIVELY INCREASING THE TEMPERATURE OF THE MIXTURE DURING THE ADDITION OF THE HYDROGEN FLUORIDE TO A MAXIMUM WITHIN THE RANGE OF APPROXIMATELY 40 DEGREES CENTIGRADE TO APPROXIMATELY 90 DEGREES CENTIGARDE, STOPPING THE ADDITION OF THE HYDROGEN FLUORIDE WHEN AN AMOUNT WITHIN THE RANGE OF APPROXIMATELY THREE TO APPROXIMATELY SIX MOLECULAR PROPORTIONS OF HYDROGEN FLUORIDE (HF) HAVE BEEN ADDED FOR EACH MOLECULAR PROPORTION OF HEXACHLOROPROPENE; MAINTAINING THE TEMPERATURE AFTER THE ADDITION OF THE HYDROGEN FLUORIDE BETWEEN APPROXIMATELY 40 AND APPROXIMATELY 90 DEGREES CENTIGRADE FOR A SUFFICIENT PERIOD TO CONVERT AT LEAST 50 PERCENT OF THE HEXACHLOROPROPENE TO 1,1,1-TRIFLUORO-2,3,3-TRICHLORO-2,3-PROPENE, AND SUBSEQUENTLY RECOVERING THE 1,1,1-TRIFLUORO-2,3,3-TRICHLORO-2,3-PROPENE FROM THE REACTION PRODUCT.
Claim 2
Dependent Claim
149 words
A PROCESS FOR THE PRODUCTION OF 1,1,1-TRIFLUORO-2,3,3-TRICHLORO-2,3-PROPENE WHICH COMPRISES PROGRESSIVELY ADDING ANHYDROUS HYDROGEN FLUORIDE TO A MIXTURE OF HEXACHLOROPROPENE CONTAINING SUSPENDED THEREIN AN AMOUNT OF PENTAVALENT ANTIMONY HALIDE WITHIN THE RANGE OF APPROXIMATELY 0.2 TO APPROXIMATELY 2.0 PERCENT BY WEIGTH OF THE HEXACHLOROPROPENE, PROGRESSIVELY INCREASING THE TEMPERATURE OF THE MIXTURE DURING THE ADDITION OF THE HYDROGEN FLUORIDE TO A MAXIMUM WITHIN THE RANGE OF APPROXIMATELY 40 DEGREES CENTIGRADE TO APPROXIMATELY 90 DEGREES CENTIGARDE, STOPPING THE ADDITION OF THE HYDROGEN FLUORIDE WHEN AN AMOUNT WITHIN THE RANGE OF APPROXIMATELY THREE TO APPROXIMATELY SIX MOLECULAR PROPORTIONS OF HYDROGEN FLUORIDE (HF) HAVE BEEN ADDED FOR EACH MOLECULAR PROPORTION OF HEXACHLOROPROPENE; MAINTAINING THE TEMPERATURE AFTER THE ADDITION OF THE HYDROGEN FLUORIDE BETWEEN APPROXIMATELY 40 AND APPROXIMATELY 90 DEGREES CENTIGRADE FOR A SUFFICIENT PERIOD TO CONVERT AT LEAST 50 PERCENT OF THE HEXACHLOROPROPENE TO 1,1,1-TRIFLUORO-2,3,3-TRICHLORO-2,3-PROPENE, AND SUBSEQUENTLY RECOVERING THE 1,1,1-TRIFLUORO-2,3,3-TRICHLORO-2,3-PROPENE FROM THE REACTION PRODUCT.
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) | 1954-06-25 | 1954-12-25 | 1955-06-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-06-25 | 1958-12-25 | 1959-06-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-06-25 | 1962-12-25 | 1963-06-26 | $7700.00 | Window Closed / Lapsed |