US3265591A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Separation of butadiene from butenes by distilling in the presence of an aqueous solution of silver salts
Assignee: EIDP Inc
•
Filing: 1962-11-15
•
Granted: 1966-08-09
•
Expires: 1982-11-15
Abstract
No abstract record available.
Inventors
- 👤 Halliwell Ronald Harry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 05:09
CPC Classifications
C; C07; C07C; C07C7/00; C07C7/04; C07C7/05; C07C7/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
77 words
METHOD FOR THE SEPARATION OF BUTADIENE FROM IXTURES THEREOF WITH BUTENES WHICH COMPRISES INTRODUCING SAID MIXTURE INTO A DISTILLATION COLUMN MAINTAINED AT A TEMPERATURE ABOVE THE BOILING POINT OF SAID MIXTURE AND BELOW 120* C., PASSING AN AQUEOUS SOLUTION OF A SILVER SALT SELECTED FROM THE GROUP CONSISTING OF SILVER FLUOBORATE, SILVER FLUOSILICATE AND MIXTURES THEREOF, SAID SILVER SALT BEING EMPLOYED IN A CONCENTRATION OF ABOUT ONE TO SIX MOLAR, THROUGH THE COLUMN, RECOVERING BUTENES FROM THE
Claim 2
Dependent Claim
77 words
METHOD FOR THE SEPARATION OF BUTADIENE FROM IXTURES THEREOF WITH BUTENES WHICH COMPRISES INTRODUCING SAID MIXTURE INTO A DISTILLATION COLUMN MAINTAINED AT A TEMPERATURE ABOVE THE BOILING POINT OF SAID MIXTURE AND BELOW 120* C., PASSING AN AQUEOUS SOLUTION OF A SILVER SALT SELECTED FROM THE GROUP CONSISTING OF SILVER FLUOBORATE, SILVER FLUOSILICATE AND MIXTURES THEREOF, SAID SILVER SALT BEING EMPLOYED IN A CONCENTRATION OF ABOUT ONE TO SIX MOLAR, THROUGH THE COLUMN, RECOVERING BUTENES FROM THE
References Cited (Backward Citations)
US2391404A
Cited
US2471550A
Cited
US2523681A
Cited
US2696464A
Cited
US2913505A
Cited
US3007981A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-08-08 | 1970-02-07 | 1970-08-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-08-08 | 1974-02-07 | 1974-08-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-08-08 | 1978-02-07 | 1978-08-09 | $7700.00 | Window Closed / Lapsed |