US2569216A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Separation of olefins from hydrocarbon distillates containing aromatics
Assignee: Standard Oil Development Co
•
Filing: 1949-04-15
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Granted: 1951-09-25
•
Expires: 1969-04-15
Abstract
No abstract record available.
Inventors
- 👤 Arundale Erving
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 18:26
CPC Classifications
C; C10; C10G; C10G21/00; C10G21/06; C07; C07C; C07C7/00; C07C7/148; C07C7/14875
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
129 words
PROCESS FOR THE SEGREGATION OF OLEFINS FROM C6 TO C8 AROMATIC HYDROCARONS, SAID OLEFINS BOILING IN APPROXIMATELY THE SAME BOILING RANGE AS THE SAID AROMATIC HYDROCARBONS WHEREBY THE SEGREGATION CANNOT BE MADE BY DISTILLATION, WHICH COMPRISES CONTACTING SAID AROMATIC HYDROCARBONS AND OLEFINS WITH 5 TO 25 VOLUME PERCENT OF A TREATING AGENT CONSISTING OF SULFURIC ACID HAVING A CONCENTRATION OF 50% TO 80% AND AN ALDEHYDE SELECTED FROM THE GROUP CONSISTING OF FORMALDEHYDE AND ACETALDEHYDE WHEREIN THE ALDEHYDE CONCENTRATION IS THE EQUIVALENT TO ABOUT 1.2 TO 2.5 MOLS PER MOL OF OLEFIN PRESENT IN THE AROMATIC HYDROCARBONS TREATED, SAID CONTACTING BEING CONDUCTED AT A TEMPERATURE IN THE RANGE FROM ABOUT 20* C. TO 50* C., AND SUBSEQUENTLY DISTILLING THE SAID TREATED HYDROCARBONS, REMOVING AROMATIC HYDROCARBONS AS AN OVERHEAD PRODUCT.
Claim 2
Dependent Claim
129 words
PROCESS FOR THE SEGREGATION OF OLEFINS FROM C6 TO C8 AROMATIC HYDROCARONS, SAID OLEFINS BOILING IN APPROXIMATELY THE SAME BOILING RANGE AS THE SAID AROMATIC HYDROCARBONS WHEREBY THE SEGREGATION CANNOT BE MADE BY DISTILLATION, WHICH COMPRISES CONTACTING SAID AROMATIC HYDROCARBONS AND OLEFINS WITH 5 TO 25 VOLUME PERCENT OF A TREATING AGENT CONSISTING OF SULFURIC ACID HAVING A CONCENTRATION OF 50% TO 80% AND AN ALDEHYDE SELECTED FROM THE GROUP CONSISTING OF FORMALDEHYDE AND ACETALDEHYDE WHEREIN THE ALDEHYDE CONCENTRATION IS THE EQUIVALENT TO ABOUT 1.2 TO 2.5 MOLS PER MOL OF OLEFIN PRESENT IN THE AROMATIC HYDROCARBONS TREATED, SAID CONTACTING BEING CONDUCTED AT A TEMPERATURE IN THE RANGE FROM ABOUT 20* C. TO 50* C., AND SUBSEQUENTLY DISTILLING THE SAID TREATED HYDROCARBONS, REMOVING AROMATIC HYDROCARBONS AS AN OVERHEAD PRODUCT.
References Cited (Backward Citations)
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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) | 1954-09-24 | 1955-03-26 | 1955-09-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-09-24 | 1959-03-26 | 1959-09-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-09-24 | 1963-03-26 | 1963-09-25 | $7700.00 | Window Closed / Lapsed |