Patent US2813141A successfully refreshed from Google Patents.
US2813141A
Expired / Lapsed
US
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Butane-recovery from unsaturated hydrocarbons
Assignee: Phillips Petroleum Co
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Filing: 1953-10-02
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Granted: 1957-11-12
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Expires: 1973-10-02
Abstract
No abstract record available.
Inventors
- 👤 Clyde H Mathis
- 👤 Fred A Siedenstrang
- 👤 William W Vandiver
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 21:29
CPC Classifications
C; C07; C07C; C07C11/00; C07C11/02; C07C11/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
87 words
A PROCESS WHICH COMPRISES DEHYDROGENATING NORMAL BUTANE IN A DEHYDROGENATION ZONE TO OBTAIN A PRODUCT MIXTURE CONTAINING BUTENE 1-BUTENE, AND 2-BUTENE, TOGETHER WITH MINOR AMOUNTS OF BUTADIENE, PROPANE, AND MATERIALS LOWER BOILING THAN PROPANE; PARTIALLY CONDENSING SAID MIXTURE TO OBTAIN A VAPOR PHASE AND A LIQUID PHASE; RECOVERING FROM SAID VAPOR PHASE A C4-AND-HEAVIER FRACTION CONTAINING MINOR AMOUNTS OF PROPANE: ADMIXING SAID C4-AND-HAVIER FRACTION WITH SAID LIQUID PHASE, THE RESULTING MIXTURE CONTAINING HYDROCARBONS WHICH READILY POLYMERIZE UNDER FRACTIONAL DISTILLATION AND EXTRACTIVE DISTILLATION CONDITIONS; SUBJECTING THE RESULTING MIXTURE
Claim 2
Dependent Claim
87 words
A PROCESS WHICH COMPRISES DEHYDROGENATING NORMAL BUTANE IN A DEHYDROGENATION ZONE TO OBTAIN A PRODUCT MIXTURE CONTAINING BUTENE 1-BUTENE, AND 2-BUTENE, TOGETHER WITH MINOR AMOUNTS OF BUTADIENE, PROPANE, AND MATERIALS LOWER BOILING THAN PROPANE; PARTIALLY CONDENSING SAID MIXTURE TO OBTAIN A VAPOR PHASE AND A LIQUID PHASE; RECOVERING FROM SAID VAPOR PHASE A C4-AND-HEAVIER FRACTION CONTAINING MINOR AMOUNTS OF PROPANE: ADMIXING SAID C4-AND-HAVIER FRACTION WITH SAID LIQUID PHASE, THE RESULTING MIXTURE CONTAINING HYDROCARBONS WHICH READILY POLYMERIZE UNDER FRACTIONAL DISTILLATION AND EXTRACTIVE DISTILLATION CONDITIONS; SUBJECTING THE RESULTING MIXTURE
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) | 1960-11-11 | 1961-05-13 | 1961-11-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-11-11 | 1965-05-13 | 1965-11-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-11-11 | 1969-05-13 | 1969-11-12 | $7700.00 | Window Closed / Lapsed |