US3317619A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of vinyl fluoride
Assignee: Diamond Shamrock Corp
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Filing: 1963-05-10
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Granted: 1967-05-02
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Expires: 1983-05-10
Abstract
No abstract record available.
Inventors
- 👤 Thomas E Hedge
- 👤 Daniel F Cooley
- 👤 Charles E Entemann
- 👤 Steinkoenig Roland
- 👤 Richard L Urbanowski
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 02:53
CPC Classifications
C; C07; C07C; C07C21/00; C07C21/02; C07C21/18; C07C17/00; C07C17/07; C07C17/08; C07C17/25; C07C17/38
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
166 words
A PROCESS FOR THE PREPARATION OF VINYL FLUORIDE MONOMER WHICH COMPRISES, IN COMBINATIONM, THE STEPS OF ACTION ZONE ACTYLENE AND HYDROGEN FLUORIDE IN A REACTION ZONE CONTAINING A HYDROFLUORINATION CATALYST COMPRISING FLUOSULFONIC ACID HAVING DISSOLVED THEREIN THE REACTION PRODUCT OF FLUOSULFONIC ACID WITH ABOUT 0.5 TO 5 WEIGHT PERCENT OF AN ANHYDROUS METAL CHLORIDE SELECTED FROM THE GROUP CONSISTING OF TIN TETRACHLORIDE, TITANIUM TETRACHLORIDE AND ANTIMONY PENTACHLORIDE FOR A SUFFICIENT PERIOD OF TIME TO EFFECT REACTION OF SAID ACETYLENE AND HYDROGEN FLUORIDE TO FORM A 1,1-DIFLUORETHANE PRODUCT; (B) CONTACTING SAID 1,1-DIFLUOROETHANE PRODUCT WITH ACETYLENE IN THE PRESENCE OF A DISPROPORTIONATION CATALYST FOR A SUFFICIENT TIME TO EFFECT REACTION OF SAID 1,1-DIFLUOROETHANE AND ACETYLENE TO FORM A VINYL FLUORIDE PRODUCT; (C) SELECTIVELY HYDROGENATING ACETYLENE IN SAID VINYL FLUOGENATING CATALYST CONTAINING A GROUP VIII METAL ON A CATALYTIC SUPPORT FOR A SUFFICIENT TIME TO REDUCE THE ACETYLENE CONTENT IN SAID VINYL FLUORIDE PRODUCT TO LESS THAN ABOUT 10 PARTS PER MILLION AND RECOVERING A VINLY FLUORIDE MONOMER PRODUCT.
Claim 2
Dependent Claim
166 words
A PROCESS FOR THE PREPARATION OF VINYL FLUORIDE MONOMER WHICH COMPRISES, IN COMBINATIONM, THE STEPS OF ACTION ZONE ACTYLENE AND HYDROGEN FLUORIDE IN A REACTION ZONE CONTAINING A HYDROFLUORINATION CATALYST COMPRISING FLUOSULFONIC ACID HAVING DISSOLVED THEREIN THE REACTION PRODUCT OF FLUOSULFONIC ACID WITH ABOUT 0.5 TO 5 WEIGHT PERCENT OF AN ANHYDROUS METAL CHLORIDE SELECTED FROM THE GROUP CONSISTING OF TIN TETRACHLORIDE, TITANIUM TETRACHLORIDE AND ANTIMONY PENTACHLORIDE FOR A SUFFICIENT PERIOD OF TIME TO EFFECT REACTION OF SAID ACETYLENE AND HYDROGEN FLUORIDE TO FORM A 1,1-DIFLUORETHANE PRODUCT; (B) CONTACTING SAID 1,1-DIFLUOROETHANE PRODUCT WITH ACETYLENE IN THE PRESENCE OF A DISPROPORTIONATION CATALYST FOR A SUFFICIENT TIME TO EFFECT REACTION OF SAID 1,1-DIFLUOROETHANE AND ACETYLENE TO FORM A VINYL FLUORIDE PRODUCT; (C) SELECTIVELY HYDROGENATING ACETYLENE IN SAID VINYL FLUOGENATING CATALYST CONTAINING A GROUP VIII METAL ON A CATALYTIC SUPPORT FOR A SUFFICIENT TIME TO REDUCE THE ACETYLENE CONTENT IN SAID VINYL FLUORIDE PRODUCT TO LESS THAN ABOUT 10 PARTS PER MILLION AND RECOVERING A VINLY FLUORIDE MONOMER 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) | 1970-05-01 | 1970-10-31 | 1971-05-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-05-01 | 1974-10-31 | 1975-05-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-05-01 | 1978-10-31 | 1979-05-02 | $7700.00 | Window Closed / Lapsed |