Patent US2505644A successfully refreshed from Google Patents.
US2505644A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of motor fuels by alkylation
Assignee: Shell Development Co
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Filing: 1946-05-24
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Granted: 1950-04-25
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Expires: 1966-05-24
Abstract
No abstract record available.
Inventors
- 👤 Sumner H Mcallister
- 👤 Edwin F Bullard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 20:00
CPC Classifications
C; C07; C07C; C07C2/00; C07C2/54; C07C2/56; C07C2/58; C07C2/62; C07C2527/00; C07C2527/02; C07C2527/053; C07C2527/054
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
133 words
PROCESS OF MANUFACTURING HIGH ANTI-KNOCK MOTOR FUEL CONSTITUENTS BOILING IN THE AVIATION GASOLINE BOILING RANGE FROM CRACKING STILL GASES CONTAINING A MIXTURE OF ISOPARAFFIN, NORMAL PARAFFIN, AND OLEFIN, WHICH COMPRISES CHARGING SAID GASEOUS MIXTURE TO A REACTION ZONE WHEREIN ISOPARAFFIN IS ALKYLATED WITH OLEFIN BY CONTACT WITH AN ALKYLATION CATALYST COMPRISING SULFURIC ACID OF ALKYLATING CONCENTRATION, SIMULTANEOUSLY MAINTAINING THE CONCENTRATION OF ISOPARAFFIN TO BE ALKYLATED IN THE HYDROCARBON PHASE OF SAID REACTION ZONE ABOVE 50% BY LIQUID VOLUME OF THE HYDROCARBONS, MAINTAINING THE RATIO OF ISOPARAFFIN TO OLEFIN AT THE POINT WHERE THE OLEFIN INITIALLY CONTACT THE CATALYST ABOVE 100 TO 1, AND MAINTAINING A HIGH DEGREE OF CONTACT BETWEEN THE ACID AND HYDROCARBON PHASES TO PRODUCE A HIGH YIELD OF HIGH ANTI-KNOCK MOTOR FUEL HYDROCARBONS BOILING IN THE AVIATION GASOLINE BOILING RANGE.
Claim 2
Dependent Claim
133 words
PROCESS OF MANUFACTURING HIGH ANTI-KNOCK MOTOR FUEL CONSTITUENTS BOILING IN THE AVIATION GASOLINE BOILING RANGE FROM CRACKING STILL GASES CONTAINING A MIXTURE OF ISOPARAFFIN, NORMAL PARAFFIN, AND OLEFIN, WHICH COMPRISES CHARGING SAID GASEOUS MIXTURE TO A REACTION ZONE WHEREIN ISOPARAFFIN IS ALKYLATED WITH OLEFIN BY CONTACT WITH AN ALKYLATION CATALYST COMPRISING SULFURIC ACID OF ALKYLATING CONCENTRATION, SIMULTANEOUSLY MAINTAINING THE CONCENTRATION OF ISOPARAFFIN TO BE ALKYLATED IN THE HYDROCARBON PHASE OF SAID REACTION ZONE ABOVE 50% BY LIQUID VOLUME OF THE HYDROCARBONS, MAINTAINING THE RATIO OF ISOPARAFFIN TO OLEFIN AT THE POINT WHERE THE OLEFIN INITIALLY CONTACT THE CATALYST ABOVE 100 TO 1, AND MAINTAINING A HIGH DEGREE OF CONTACT BETWEEN THE ACID AND HYDROCARBON PHASES TO PRODUCE A HIGH YIELD OF HIGH ANTI-KNOCK MOTOR FUEL HYDROCARBONS BOILING IN THE AVIATION GASOLINE BOILING RANGE.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-04-24 | 1953-10-24 | 1954-04-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-04-24 | 1957-10-24 | 1958-04-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-04-24 | 1961-10-24 | 1962-04-25 | $7700.00 | Window Closed / Lapsed |