US2493499A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pretreating hydrocarbons to be isomerized
Assignee: Standard Oil Development Co
•
Filing: 1946-12-28
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Granted: 1950-01-03
•
Expires: 1966-12-28
Abstract
No abstract record available.
Inventors
- 👤 Stephen F Perry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 21:42
CPC Classifications
C; C10; C10G; C10G45/00; C10G45/02; C10G45/22; C10G2400/00; C10G2400/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
182 words
A PROCESS OF ISOMERIZING A LIGHT NAPHTHA FRACTION CONTAINING OLEFINS AND AROMATICS IN THE PRESENCE OF ALUMINUM CHLORIDE DEPOSITED ON ALUMINA AND A HYDROGEN HALIDE PROMOTER WHICH COMPRISES TREATING THE LIGHT NAPHTHA FRACTION IN THE VAPOR PHASE IN A FIRST STEP WITH EXCESS HYDROGEN UNDER A PRESSURE NOT MORE THAN 50 ATMOSPHERES, AND A CATALYST CONSISTING OF 2% PALLADIUM ON ALUMINA TO SATURATE THE OLEFINS AND AROMATICS, CONDENSING AND COOLING THE HYDROGENATED LIGHT NAPHTHA IN THE PRESENCE OF THE HYDROGEN AND UNDER THE PRESSURE TO BE USED IN A SUBSEQUENT ISOMERIZATION STEP TO SUBSTANTIALLY SATURATE THE HYDROGENATED LIGHT NAPHTHA WITH HYDROGEN AT THE PRESSURE OF THE SUBSEQUENT ISOMERIZATION STEP, WHEREBY A PORTION OF THE HYDROGEN DISSOLVES THEREIN, SEPARATING UNDISSOLVED HYDROGEN AND RECYCLING IT TO THE HYDROGENATION STEP, SUBJECTING THE LIGHT NAPHTHA FRACTION IN A SECOND STEP IN THE PRESENCE OF THE DISSOLVED HYDROGEN TO THE ISOMERIZING ACTION OF THE ALUMINUM CHLORIDE AND HYDROGEN HALIDE, STRIPPING HYDROGEN HALIDE AND HYDROGEN FROM THE ISOMERIZED PRODUCT AND RECYCLING THE SAID HYDROGEN HALIDE TO THE ISOMERIZATION STEP AND RECYCLING THE SAID HYDROGEN TO THE HYDROGENATION STEP.
Claim 2
Dependent Claim
182 words
A PROCESS OF ISOMERIZING A LIGHT NAPHTHA FRACTION CONTAINING OLEFINS AND AROMATICS IN THE PRESENCE OF ALUMINUM CHLORIDE DEPOSITED ON ALUMINA AND A HYDROGEN HALIDE PROMOTER WHICH COMPRISES TREATING THE LIGHT NAPHTHA FRACTION IN THE VAPOR PHASE IN A FIRST STEP WITH EXCESS HYDROGEN UNDER A PRESSURE NOT MORE THAN 50 ATMOSPHERES, AND A CATALYST CONSISTING OF 2% PALLADIUM ON ALUMINA TO SATURATE THE OLEFINS AND AROMATICS, CONDENSING AND COOLING THE HYDROGENATED LIGHT NAPHTHA IN THE PRESENCE OF THE HYDROGEN AND UNDER THE PRESSURE TO BE USED IN A SUBSEQUENT ISOMERIZATION STEP TO SUBSTANTIALLY SATURATE THE HYDROGENATED LIGHT NAPHTHA WITH HYDROGEN AT THE PRESSURE OF THE SUBSEQUENT ISOMERIZATION STEP, WHEREBY A PORTION OF THE HYDROGEN DISSOLVES THEREIN, SEPARATING UNDISSOLVED HYDROGEN AND RECYCLING IT TO THE HYDROGENATION STEP, SUBJECTING THE LIGHT NAPHTHA FRACTION IN A SECOND STEP IN THE PRESENCE OF THE DISSOLVED HYDROGEN TO THE ISOMERIZING ACTION OF THE ALUMINUM CHLORIDE AND HYDROGEN HALIDE, STRIPPING HYDROGEN HALIDE AND HYDROGEN FROM THE ISOMERIZED PRODUCT AND RECYCLING THE SAID HYDROGEN HALIDE TO THE ISOMERIZATION STEP AND RECYCLING THE SAID HYDROGEN TO THE HYDROGENATION STEP.
References Cited (Backward Citations)
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Cited
US2181640A
Cited
US2143364A
Cited
US2299716A
Cited
US2327593A
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US2390883A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-01-02 | 1953-07-04 | 1954-01-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-01-02 | 1957-07-04 | 1958-01-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-01-02 | 1961-07-04 | 1962-01-03 | $7700.00 | Window Closed / Lapsed |