Patent US4154580A successfully refreshed from Google Patents.
US4154580A
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Method for producing a stabilized gasoline-alcohol fuel
Assignee: Mobil Oil AS
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Filing: 1978-01-09
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Granted: 1979-05-15
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Expires: 1998-01-09
Abstract
Abstract Stable gasoline-alcohol fuel mixtures are produced by hydration of a gasoline or a fraction thereof high in olefins in the presence of an acid catalyst to form a high alcohol content gasoline mixture, which mixture is blended with a gasoline containing up to about 20 volume percent of methanol. The addition of the catalytically hydrated gasoline or olefinic fraction thereof serves to maintain the methanol in complete solution at low temperatures, particularly in the presence of water contaminant.
Inventors
- 👤 Phillip S. Landis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 23:06
CPC Classifications
C; C10; C10L; C10L1/00; C10L1/02; C10L1/023
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
141 words
A method for reducing the olefin content of cracked gasoline and for producing a high octane stabilized gasoline-alcohol fuel blend which comprises, in combination: (a) hydrating a cracked gasoline or a fraction thereof high in olefins to form a mixture containing between about 10 and 60% by weight of low molecular weight alcohols, whereby reducing the olefin content of said gasoline without loss in octane; and without separation of the alcohols from said mixture, (b) blending an amount of the resultant high alcohol content gasoline with a major proportion of gasoline and 5 to 20 volume percent of methanol, said amount, based on alcohol content, being between about 2 and about 20 volume percent of the gasoline-methanol mixture, whereby producing a fuel blend in which said methanol is not suceptible of separation at low temperatures or in the presence of water.
Claim 2
Independent Claim
141 words
A method for reducing the olefin content of cracked gasoline and for producing a high octane stabilized gasoline-alcohol fuel blend which comprises, in combination: (a) hydrating a cracked gasoline or a fraction thereof high in olefins to form a mixture containing between about 10 and 60% by weight of low molecular weight alcohols, whereby reducing the olefin content of said gasoline without loss in octane; and without separation of the alcohols from said mixture, (b) blending an amount of the resultant high alcohol content gasoline with a major proportion of gasoline and 5 to 20 volume percent of methanol, said amount, based on alcohol content, being between about 2 and about 20 volume percent of the gasoline-methanol mixture, whereby producing a fuel blend in which said methanol is not suceptible of separation at low temperatures or in the presence of water.
Claim 3
Dependent Claim
21 words
The method of claim 1 wherein the mixture of low molecular weight alcohols consist essentially of C 2 -C 9 alcohols.
Claim 4
Dependent Claim
21 words
The method of claim 1 wherein the mixture of low molecular weight alcohols consist essentially of C 5 -C 7 alcohols.
Claim 5
Dependent Claim
21 words
The method of claim 1 wherein the mixture of low molecular weight alcohols consist essentially of C 4 -C 7 alcohols.
Claim 6
Dependent Claim
53 words
The method of claim 1 in which said hydration is carried out in the presence of an acid catalyst, at a temperature between about 50° C. and about 300° C. and a pressure between about 1 and about 500 atmospheres, utilizing a water/olefinic hydrocarbon ratio within the approximate range of 1:1 to 5:1.
Claim 7
Dependent Claim
16 words
The method of claim 1 wherein said low molecular weight alcohols comprise tertiary and secondary alcohols.
Claim 8
Dependent Claim
32 words
The method of claim 1 wherein the alcohol portion of the stabilized gasoline-alcohol fuel blend contains a major proportion of methanol, a primary alcohol, and lesser amounts of tertiary and secondary alcohols.
Claim 9
Dependent Claim
77 words
A stabilized gasoline-alcohol fuel blend consisting essentially of a major proportion of gasoline and 5 to 20 volume percent of methanol, together with an amount of gasoline containing between about 2 and about 20 volume percent of the gasoline-methanol mixture of mixed low molecular weight alcohols resulting from hydration of a gasoline or fraction thereof high in olefins, said amount based on alcohol content, being between about 2 and about 20 volume percent of the gasoline-methanol mixture.
Claim 10
Dependent Claim
77 words
A stabilized gasoline-alcohol fuel blend consisting essentially of a major proportion of gasoline and 5 to 20 volume percent of methanol, together with an amount of gasoline containing between about 2 and about 20 volume percent of the gasoline-methanol mixture of mixed low molecular weight alcohols resulting from hydration of a gasoline or fraction thereof high in olefins, said amount based on alcohol content, being between about 2 and about 20 volume percent of the gasoline-methanol mixture.
Claim 11
Dependent Claim
23 words
The stabilized gasoline-alcohol fuel blend of claim 8 wherein said mixed low molecular weight alcohols consist essentially of C 2 -C 7 alcohols.
Claim 12
Dependent Claim
23 words
The stabilized gasoline-alcohol fuel blend of claim 8 wherein said mixed low molecular weight alcohols consist essentially of C 5 -C 7 alcohols.
Claim 13
Dependent Claim
23 words
The stabilized gasoline-alcohol fuel blend of claim 8 wherein said mixed low molecular weight alcohols consist essentially of C 4 -C 7 alcohols.
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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) | 1982-05-14 | 1982-11-13 | 1983-05-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-05-14 | 1986-11-13 | 1987-05-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-05-14 | 1990-11-13 | 1991-05-15 | $7700.00 | Window Closed / Lapsed |