Patent US3038397A successfully refreshed from Google Patents.
Patent US3007985A successfully refreshed from Google Patents.
US3007985A
Expired / Lapsed
US
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Separation of dimethyl butane from methyl pentane
Assignee: Standard Oil Co
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Filing: 1958-02-26
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Granted: 1961-11-07
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Expires: 1978-02-26
Abstract
No abstract record available.
Inventors
- 👤 Robert C Binning
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 12:45
CPC Classifications
C; C07; C07C; C07C9/00; C07C9/14; C07C9/16; C07C5/00; C07C5/22; C07C5/27; C07C5/2767; C07C5/277; C07C5/2791; C07C7/00; C07C7/04; C07C7/05; C07C7/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
151 words
A PROCESS FOR PRODUCING DEMETHYL BUTANE-RICH HEXANES WHICH COMPRISES ISOMERIZING AT LEAST ONE HEXANE SELECTED FROM THE GROUP CONSISTING OF NORMAL HEXANE AND METHYL PENTANE AT A TEMPERATURE OF FROM 500* TO 800* F. USING A SUPPORTED METAL CATALYST AND THEREBY PRODUCING ISOMERIZATION PRODUCTS CONTAINING A MAJOR PROPORTION OF METHYL PENTANES AND NORMAL HEXANE AND A MINOR PROPORTION OF DEMETHYL BUTANES, AZEOTROPICALLY DISTILLING AT LEAST A PORTION OF SAID ISOMERIZATION PRODUCTS WITH AN AGENT WHICH FORMS AZEOTROPES WITH DEMETHYL BUTANES WHEREBY A FIRS FRACTION CONTAINING THE AZEOTROPING AGENT AND ISOMERIC HEXANES HAVING A HIGHER CONCENTRATION OF DEMETHYL BUTANES THAN IS PRESENT IN THE ISOMERIZATION PRODUCTS IS SEPARATED FROM A SECOND FRACTION OF ISOMERIC HEXANES WHICH HAS LOWER CONCENTRATION OF DIMETHYL BUTANES THAN IS PRESENT IN SAID ISOMERIZATION PRODUCTS, RETURNING AT LEAST A PORTION OF SAID SECOND FRACTION TO ISOMERIZATION PROCESS, AND RECOVERING FROM SAID FIRST FRACTION A DIMETHYL BUTANE-RICH HEXANE FRACTION.
Claim 2
Dependent Claim
151 words
A PROCESS FOR PRODUCING DEMETHYL BUTANE-RICH HEXANES WHICH COMPRISES ISOMERIZING AT LEAST ONE HEXANE SELECTED FROM THE GROUP CONSISTING OF NORMAL HEXANE AND METHYL PENTANE AT A TEMPERATURE OF FROM 500* TO 800* F. USING A SUPPORTED METAL CATALYST AND THEREBY PRODUCING ISOMERIZATION PRODUCTS CONTAINING A MAJOR PROPORTION OF METHYL PENTANES AND NORMAL HEXANE AND A MINOR PROPORTION OF DEMETHYL BUTANES, AZEOTROPICALLY DISTILLING AT LEAST A PORTION OF SAID ISOMERIZATION PRODUCTS WITH AN AGENT WHICH FORMS AZEOTROPES WITH DEMETHYL BUTANES WHEREBY A FIRS FRACTION CONTAINING THE AZEOTROPING AGENT AND ISOMERIC HEXANES HAVING A HIGHER CONCENTRATION OF DEMETHYL BUTANES THAN IS PRESENT IN THE ISOMERIZATION PRODUCTS IS SEPARATED FROM A SECOND FRACTION OF ISOMERIC HEXANES WHICH HAS LOWER CONCENTRATION OF DIMETHYL BUTANES THAN IS PRESENT IN SAID ISOMERIZATION PRODUCTS, RETURNING AT LEAST A PORTION OF SAID SECOND FRACTION TO ISOMERIZATION PROCESS, AND RECOVERING FROM SAID FIRST FRACTION A DIMETHYL BUTANE-RICH HEXANE 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) | 1964-11-06 | 1965-05-08 | 1965-11-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-11-06 | 1969-05-08 | 1969-11-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-11-06 | 1973-05-08 | 1973-11-07 | $7700.00 | Window Closed / Lapsed |