US2999890A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for isomerization of hydrocarbons
Assignee: Phillips Petroleum Co
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Filing: 1959-12-21
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Granted: 1961-09-12
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Expires: 1979-12-21
Abstract
No abstract record available.
Inventors
- 👤 Joseph W Davison
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 09:19
CPC Classifications
C; C10; C10L; C10L1/00; C10L1/04; C10L1/06; C07; C07C; C07C13/00; C07C13/02; C07C13/16; C07C13/18; C07C5/00; C07C5/22; C07C5/27; C07C5/2767; C07C5/277; C07C5/2778; C07C5/2786; C07C5/2789; C07C5/29; C07C7/00; C07C7/148; C07C7/163; C07C9/00; C07C9/14; C07C9/16; Y; Y10; Y10S; Y10S585/00; Y10S585/929; Y10S585/94
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
98 words
IN A PROCESS IN WHICH A HYDROCARBON STREAM COMPRISING ISOHEXANES, METHYLCYCLOPENTANE AND NORMAL HEXANE IS FRACTIONATED IN A FIRST FRACTIONAL DISTILLATION ZONE TO SEPARATE A PRODUCT RICH IN ISOHEXANES FROM A STREAM CONTAINING NORMAL HEXANE AND METHYLCLOPENTANE WHICH ARE SUBJECTED TO ISOMERIZATION CONDITIONS TO FORM THEREFROM ISOHEXANES AND CYCLOHEXANE IN AN EFFLUENT STREAM, AND SAID EFFLUENT STREAM IS FRACTIONATED IN A SECOND FRACTIONAL DISTILLATION ZONE TO SEPARATE CYCLOHEXANE AND PRODUCE AN OVERHEAD FRACTION, THE IMPROVEMENT WHICH COMPRISES REFLUXING THE FIRST FRACTIONAL DISTILLATION ZONE WITH AT LEAST A PORTION OF SAID OVERHEAD FRACTION FROM THE SECOND FRACTIONAL DISTILLATION ZONE.
Claim 2
Dependent Claim
98 words
IN A PROCESS IN WHICH A HYDROCARBON STREAM COMPRISING ISOHEXANES, METHYLCYCLOPENTANE AND NORMAL HEXANE IS FRACTIONATED IN A FIRST FRACTIONAL DISTILLATION ZONE TO SEPARATE A PRODUCT RICH IN ISOHEXANES FROM A STREAM CONTAINING NORMAL HEXANE AND METHYLCLOPENTANE WHICH ARE SUBJECTED TO ISOMERIZATION CONDITIONS TO FORM THEREFROM ISOHEXANES AND CYCLOHEXANE IN AN EFFLUENT STREAM, AND SAID EFFLUENT STREAM IS FRACTIONATED IN A SECOND FRACTIONAL DISTILLATION ZONE TO SEPARATE CYCLOHEXANE AND PRODUCE AN OVERHEAD FRACTION, THE IMPROVEMENT WHICH COMPRISES REFLUXING THE FIRST FRACTIONAL DISTILLATION ZONE WITH AT LEAST A PORTION OF SAID OVERHEAD FRACTION FROM THE SECOND FRACTIONAL DISTILLATION ZONE.
Claim 3
Dependent Claim
121 words
IN A PROCESS IN WHICH A HYDROCARBON STREAM COMPRISING ISOHEXANES, METHYLCYCLOPENTANE AND NORMAL HEXANE IS FRACTIONATED IN A FIRST FRACTIONAL DISTILLATION ZONE TO SEPARATE AS A FIRST OVERHEAD FRACTION A PRODUCT RICH IN ISOHEXANES FROM A STREAM CONTAINING NORMAL HEXANE AND METHYLCYCLOPENTANE WHICH ARE SUBJECTED TO ISOMERIZATION CONDITIONS TO FORM THEREFROM ISOHEXANES AND CYCLOHEXANE IN AN EFFLUENT STREAM, AND SAID EFFLUENT STREAM IS FRACTIONATED IN A SECOND FRACTIONAL DISTILLATION ZONE TO SEPARATE CYCLOHEXANE, AS A DISTILLATION RESIDUE, FROM ISOHEXANES AS A SECOND OVERHEAD FRACTION, THE IMPROVEMENT WHICH COMPRISES REFLUXING THE FIRST FRACTIONAL DISTILLATION ZONE WITH AT LEAST A PORTION OF SAID SECOND OVERHEAD FRACTION, AND REFLUXING THE SECOND FRACTIONAL DISTILLATION ZONE WITH AT LEAST A PORTION OF SAID FIRST OVERHEAD FRACTION.
Claim 4
Dependent Claim
121 words
IN A PROCESS IN WHICH A HYDROCARBON STREAM COMPRISING ISOHEXANES, METHYLCYCLOPENTANE AND NORMAL HEXANE IS FRACTIONATED IN A FIRST FRACTIONAL DISTILLATION ZONE TO SEPARATE AS A FIRST OVERHEAD FRACTION A PRODUCT RICH IN ISOHEXANES FROM A STREAM CONTAINING NORMAL HEXANE AND METHYLCYCLOPENTANE WHICH ARE SUBJECTED TO ISOMERIZATION CONDITIONS TO FORM THEREFROM ISOHEXANES AND CYCLOHEXANE IN AN EFFLUENT STREAM, AND SAID EFFLUENT STREAM IS FRACTIONATED IN A SECOND FRACTIONAL DISTILLATION ZONE TO SEPARATE CYCLOHEXANE, AS A DISTILLATION RESIDUE, FROM ISOHEXANES AS A SECOND OVERHEAD FRACTION, THE IMPROVEMENT WHICH COMPRISES REFLUXING THE FIRST FRACTIONAL DISTILLATION ZONE WITH AT LEAST A PORTION OF SAID SECOND OVERHEAD FRACTION, AND REFLUXING THE SECOND FRACTIONAL DISTILLATION ZONE WITH AT LEAST A PORTION OF SAID FIRST OVERHEAD FRACTION.
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) | 1964-09-11 | 1965-03-13 | 1965-09-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-09-11 | 1969-03-13 | 1969-09-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-09-11 | 1973-03-13 | 1973-09-12 | $7700.00 | Window Closed / Lapsed |