US2750435A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for separation of c4 hydrocarbons and solvent therefor
Assignee: Phillips Petroleum Co
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Filing: 1954-12-17
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Granted: 1956-06-12
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Expires: 1974-12-17
Abstract
No abstract record available.
Inventors
- 👤 Fetchin John
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 12:04
CPC Classifications
C; C07; C07C; C07C11/00; C07C11/12; C07C11/16; C07C11/167; C07C11/02; C07C11/08; C07C7/00; C07C7/04; C07C7/05; C07C7/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
101 words
A PROCESS FOR THE MANUFACTURE OF OLEFINS FROM NORMAL BUTANE WHICH COMPRISES, CATALYTICALLY DEHYDROGENATING NORMAL BUTANE TO SAID OLEFINS, SUBJECTING THE C4 HYDROCARBON CONTENT OF THE REACTION EFFLUENT TO FRACTIONAL DISTILLATION SO AS TO REMOVE THE BUTENE-1 CONTENT THEREOF AS AN OVERHEAD PRODUCT AND PRODUCE A BOTTOMS PRODUCT CONTAINING PRINCIPALLY THE N-BUTANE AND BUTENE-2 CONTENT THEREOF, SUBJECTING THE RESULTING MIXTURE OF N-BUTANE AND BUTENE-2 TO EXTRACTIVE DISTILLATION WITH A SOLVENT COMPRISING ESSENTIALLY A MIXTURE OF FURFURAL, 1 TO 60 WEIGHT PER CENT OF C5-C10 HYDROCARBONS FORMED IN SAID PROCESS AND COMPRISING PRINCIPALLY BUTADINE DIMER, AND LIQUID POLYDIMETHYL SILOXANE OF THE FORMULA
Claim 2
Dependent Claim
101 words
A PROCESS FOR THE MANUFACTURE OF OLEFINS FROM NORMAL BUTANE WHICH COMPRISES, CATALYTICALLY DEHYDROGENATING NORMAL BUTANE TO SAID OLEFINS, SUBJECTING THE C4 HYDROCARBON CONTENT OF THE REACTION EFFLUENT TO FRACTIONAL DISTILLATION SO AS TO REMOVE THE BUTENE-1 CONTENT THEREOF AS AN OVERHEAD PRODUCT AND PRODUCE A BOTTOMS PRODUCT CONTAINING PRINCIPALLY THE N-BUTANE AND BUTENE-2 CONTENT THEREOF, SUBJECTING THE RESULTING MIXTURE OF N-BUTANE AND BUTENE-2 TO EXTRACTIVE DISTILLATION WITH A SOLVENT COMPRISING ESSENTIALLY A MIXTURE OF FURFURAL, 1 TO 60 WEIGHT PER CENT OF C5-C10 HYDROCARBONS FORMED IN SAID PROCESS AND COMPRISING PRINCIPALLY BUTADINE DIMER, AND LIQUID POLYDIMETHYL SILOXANE OF THE FORMULA
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) | 1959-06-12 | 1959-12-12 | 1960-06-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-06-12 | 1963-12-12 | 1964-06-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-06-12 | 1967-12-12 | 1968-06-12 | $7700.00 | Window Closed / Lapsed |