US3767565A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of high octane gasoline using disproportionation, alkylation and dimerization steps
Assignee: Phillips Petroleum Co
•
Filing: 1971-12-10
•
Granted: 1973-10-23
•
Expires: 1991-12-10
Abstract
Abstract The octane value and volume of gasoline is increased by subjecting an olefinic gasoline to separation to provide a C5 cut containing both linear and branched C5 olefins, reacting the C5 cut with added ethylene in the presence of an olefin disproportionation catalyst to produce isobutene and propylene, disproportionating the produced propylene to provide ethylene and n-butenes, alkylating the n-butenes with isobutane to provide a high octane alkylate, dimerizing produced isobutene to provide diisoburylene, reacting the diisobutylene with ethylene to provide isohexenes, and recombining the high octane alkylate, isohexenes, and the remaining olefinic gasolines to provide an upgraded gasoline having increased octane ratings.
Inventors
- 👤 R Banks
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 04:50
CPC Classifications
C; C10; C10L; C10L1/00; C10L1/04; C10L1/06
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
60 words
The process of claim 1 including the step of combining the C5+ heavier gasoline stream containing the produced isohexenes of step (3), the high octane alkylate of step (8) and the C6+ gasoline stream of step (1) to provide a gasoline having an increased Motor Octane Value when compared to the feed gasoline having at least 20 weight percent olefins.
Claim 2
Dependent Claim
28 words
passing the stream comprising C5 hydrocarbons in admixture with ethylene over an olefin disproportionation catalyst to provide an effluent containing ethylene, propylene, isobutene, and a C5+ heavier gasoline,
Claim 3
Dependent Claim
28 words
separating the effluent stream of step (2) to provide a stream comprising ethylene, a stream comprising propylene, a stream comprising isobutene, and a stream comprising the C5+ gasoline,
Claim 4
Dependent Claim
19 words
The process of claim 2 wherein the feed gasoline contains from about 30 to about 70 percent olefin hydrocarbons.
Claim 5
Dependent Claim
41 words
The process of claim 2 wherein the olefin disproportionation catalyst of steps (2), (5) and (9) comprises tungsten oxide on silica, alumina, or aluminum phosphate, molybdenum oxide on silica, alumina, or aluminum phosphate, or rhenium oxide on alumina or aluminum phosphate.
Claim 6
Dependent Claim
11 words
passing a part of the stream comprising ethylene to step (2),
Claim 7
Dependent Claim
18 words
passing the stream comprising propylene over an olefin disproportionation catalyst to provide an effluent comprising ethylene and butenes,
Claim 8
Dependent Claim
32 words
The process of claim 2 wherein the olefin disproportionation catalyst of steps (2) and (9) comprises an admixture of a solid olefin double bond isomerization catalyst and a solid olefin disproportionation catalyst.
Claim 9
Dependent Claim
22 words
The process of claim 5 wherein the olefin disproportionation catalyst is tungsten oxide on silica and the double bond isomerization is MgO.
Claim 10
Dependent Claim
16 words
passing the stream comprising isobutene over a dimerization catalyst to provide an effluent stream comprising diisobutylene,
Claim 11
Dependent Claim
24 words
passing the stream comprising ethylene and butenes from step (5) to a separation zone to provide a second ethylene stream and a butenes stream,
Claim 12
Dependent Claim
15 words
The process of claim 2 wherein the dimerization catalyst of step (6) is silica alumina.
Claim 13
Dependent Claim
26 words
The process of claim 2 wherein the volume of gasoline of step (11) is at least 20 percent greater than the volume of the feed gasoline.
Claim 14
Dependent Claim
22 words
passing the butenes stream of step (7) to an alkylation zone to an admixture with isobutane to provide a high octane alkylate,
Claim 15
Dependent Claim
35 words
passing the stream comprising diisobutylene from step (6) in admixture with at least part of the second ethylene stream from step (7) over an olefin disproportionation catalyst to provide an effluent stream comprising isohexene, and
Claim 16
Dependent Claim
20 words
The process of claim 2 wherein the alkylation zone of step (8) uses an alkylation catalyst which is hydrogen fluoride.
Claim 17
Dependent Claim
25 words
The process of claim 2 wherein the feed gasoline is a full range cat-cracked gasoline having an end boiling point which does not exceed 450*F.
Claim 18
Dependent Claim
9 words
returning the effluent stream comprising isohexenes to step (3).
References Cited (Backward Citations)
US3060116A
Cited
US3296330A
Cited
US3321547A
Cited
US3409540A
Cited
US3565969A
Cited
US3634538A
Cited
US3660516A
Cited
US3658929A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-10-22 | 1977-04-23 | 1977-10-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-22 | 1981-04-23 | 1981-10-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-22 | 1985-04-23 | 1985-10-23 | $7700.00 | Window Closed / Lapsed |