Patent US2855446A successfully refreshed from Google Patents.
US2855446A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of olefinic c5 hydrocarbons
Assignee: Phillips Petroleum Co
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Filing: 1956-03-28
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Granted: 1958-10-07
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Expires: 1976-03-28
Abstract
No abstract record available.
Inventors
- 👤 Robert A Findlay
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 14:20
CPC Classifications
C; C10; C10L; C10L1/00; C10L1/04; C10L1/06; C07; C07C; C07C11/00; C07C11/02; C07C11/10; C07C5/00; C07C5/32; C07C5/327; C07C5/333; C07C5/3332; C07C7/00; C07C7/10; C07C9/00; C07C9/14; C07C9/16
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
193 words
A PROCESS FOR THE PRODUCTION OF UNSATURATED C5 HYDROCARBONS HAVING INCREASED ANTI-KNOCK VALUE FROM SATURATED C5 HYDROCARBONS, WHICH PROCESS COMPRISES THE COMBINATION OF STEPS; COMTACTING SAID SATURATED C5 HYDROCARBONS WITH A DEHYDROGENATION CATALYST IN A DEHYDROGENATION ZONE TO PRODUCE A MIXTURE CONTAINING PARAFFINIC AND OLEFINIC HYDROCARBONS; FRACTIONATING SAID MIXTURE IN A FIRST FRACTIONATION ZONE TO OBTAIN A FIRST OVERHEAD FRACTION COMPRISING PARAFFINICA AND OLEFINIC C3 TO C5 HYDROCARBONS LOWER BOILING THAN ISOPENTANE, AND A FIRST BOTTOMS FRACTION COMPRISING ISOPENTANE AND PARAFFINIC AND OLEFINIC AC5 HYDROCARBONS HIGHER BOILING THAN ISOPENTANE; FRACTIONATING SAID FIRST BOTTOMS FRACTION IN A SECOND FRACTIONATION ZONE TO OBTAIN A SECOND OVERHEAD FRACTION COMPRISING ISO-PENTANE AND OLEFINIC C5 HYDROCARBONS LOWER BOILING THAN NORMAL PENTANE, AND A SECOND BOTTOMS FRACTION COMPRISING NORMAL PENTANE AND OLEFINIC C5 HYDROCARBONS BOILING HIGHER THAN NORMAL PENTANE; RETURNING AT LEAST A PORTION OF SAID SECOND OVERHEAD STREAM TO SAID DEHYDROGENATION ZONE; SOLVENT EXTRACTING AID SECOND BOTTOMS FRACTION WITH A SELECTIVE SOLVENT TO PRODUCE A RAFFINATE COMPRISING NORMAL PENTANE AND AN EXTRACT COMPRISING SAID C5 OLEFINIC HYDROCARBONS HIGHER BOILING THAN NORMAL PENTANE; RETURNING SAID RAFFINATE TO SAID DEHYDROGENATION ZONE; AND RECOVERING SAID EXTRACT AS PRODUCT OF THE PROCESS.
Claim 2
Dependent Claim
193 words
A PROCESS FOR THE PRODUCTION OF UNSATURATED C5 HYDROCARBONS HAVING INCREASED ANTI-KNOCK VALUE FROM SATURATED C5 HYDROCARBONS, WHICH PROCESS COMPRISES THE COMBINATION OF STEPS; COMTACTING SAID SATURATED C5 HYDROCARBONS WITH A DEHYDROGENATION CATALYST IN A DEHYDROGENATION ZONE TO PRODUCE A MIXTURE CONTAINING PARAFFINIC AND OLEFINIC HYDROCARBONS; FRACTIONATING SAID MIXTURE IN A FIRST FRACTIONATION ZONE TO OBTAIN A FIRST OVERHEAD FRACTION COMPRISING PARAFFINICA AND OLEFINIC C3 TO C5 HYDROCARBONS LOWER BOILING THAN ISOPENTANE, AND A FIRST BOTTOMS FRACTION COMPRISING ISOPENTANE AND PARAFFINIC AND OLEFINIC AC5 HYDROCARBONS HIGHER BOILING THAN ISOPENTANE; FRACTIONATING SAID FIRST BOTTOMS FRACTION IN A SECOND FRACTIONATION ZONE TO OBTAIN A SECOND OVERHEAD FRACTION COMPRISING ISO-PENTANE AND OLEFINIC C5 HYDROCARBONS LOWER BOILING THAN NORMAL PENTANE, AND A SECOND BOTTOMS FRACTION COMPRISING NORMAL PENTANE AND OLEFINIC C5 HYDROCARBONS BOILING HIGHER THAN NORMAL PENTANE; RETURNING AT LEAST A PORTION OF SAID SECOND OVERHEAD STREAM TO SAID DEHYDROGENATION ZONE; SOLVENT EXTRACTING AID SECOND BOTTOMS FRACTION WITH A SELECTIVE SOLVENT TO PRODUCE A RAFFINATE COMPRISING NORMAL PENTANE AND AN EXTRACT COMPRISING SAID C5 OLEFINIC HYDROCARBONS HIGHER BOILING THAN NORMAL PENTANE; RETURNING SAID RAFFINATE TO SAID DEHYDROGENATION ZONE; AND RECOVERING SAID EXTRACT AS PRODUCT OF THE PROCESS.
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) | 1961-10-06 | 1962-04-07 | 1962-10-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-10-06 | 1966-04-07 | 1966-10-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-10-06 | 1970-04-07 | 1970-10-07 | $7700.00 | Window Closed / Lapsed |