Patent US4384872A successfully refreshed from Google Patents.
US4384872A
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Stabilized gasoline-alcohol fuel compositions
Assignee: Gas Technology Institute
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Filing: 1979-03-05
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Granted: 1983-05-24
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Expires: 1999-03-05
Abstract
Abstract Motor fuel composition of about 5 to 50 weight percent methanol, ethanol or mixtures thereof in gasoline with a minor amount of a selected surface active agent which significantly increases the water tolerance of the gasoline-alcohol fuel composition. Suitable surface active additive agents include higher alcohols, higher primary amines, alkyl amides and urea, alkyl ethers and dioxane and alkylphenoxy-polyethoxylated ethanols.
Inventors
- 👤 Frank L. Kester
- 👤 Robert V. Fitzsimmons
- 👤 Donald L. Klass
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 19:10
CPC Classifications
C; C10; C10L; C10L1/00; C10L1/10; C10L1/14; C10L1/18; C10L1/182; C10L1/1822; C10L1/1824; C10L1/143; C10L1/192; C10L1/198; C10L1/1985; C10L1/22; C10L1/222; C10L1/2222; C10L1/2227; C10L1/224; Y; Y10; Y10S; Y10S516/00; Y10S516/01; Y10S516/07
Claims Analysis
Total Claims: 28
Claim 1
Independent Claim
142 words
A motor fuel composition comprising: about 5 to 50 weight percent of an alcohol selected from the group consisting of methanol, ethanol and mixtures thereof; about 0.1 to 5 weight percent of a surface or interfacial modifying agent selected from the group consisting of normal ROH, R-NH 2 , R'CO-NH 2 , R" 1 -O-R" 2 , dioxane and R'"(CH 2 CH 2 O) x H wherein R is an alkyl group of 5 to 10 carbon atoms, R' is either -NH 2 or an alkyl group of 1 to 7 carbon atoms, R" 1 and R" 2 are each an alkyl group of 2 to 7 hydrocarbon atoms and R'" is an alkyl phenol group where the alkyl group has 5 to 9 carbon atoms and x is an integer from 5 to about 15; and the balance thereof being gasoline.
Claim 2
Dependent Claim
142 words
A motor fuel composition comprising: about 5 to 50 weight percent of an alcohol selected from the group consisting of methanol, ethanol and mixtures thereof; about 0.1 to 5 weight percent of a surface or interfacial modifying agent selected from the group consisting of normal ROH, R-NH 2 , R'CO-NH 2 , R" 1 -O-R" 2 , dioxane and R'"(CH 2 CH 2 O) x H wherein R is an alkyl group of 5 to 10 carbon atoms, R' is either -NH 2 or an alkyl group of 1 to 7 carbon atoms, R" 1 and R" 2 are each an alkyl group of 2 to 7 hydrocarbon atoms and R'" is an alkyl phenol group where the alkyl group has 5 to 9 carbon atoms and x is an integer from 5 to about 15; and the balance thereof being gasoline.
Claim 3
Dependent Claim
79 words
A motor fuel composition comprising: about 5 to 50 weight percent of an alcohol selected from the group consisting of methanol, ethanol and mixtures thereof; about 0.5 to 5 weight percent of a surface or interfacial modifying agent consisting of a primary alcohol having the formula ROH wherein R is a normal alkyl group of 5 to 10 carbon atoms, all alcohols present in said composition being primary alcohols having one normal-alkyl group; and the balance thereof being gasoline.
Claim 4
Dependent Claim
79 words
A motor fuel composition comprising: about 5 to 50 weight percent of an alcohol selected from the group consisting of methanol, ethanol and mixtures thereof; about 0.5 to 5 weight percent of a surface or interfacial modifying agent consisting of a primary alcohol having the formula ROH wherein R is a normal alkyl group of 5 to 10 carbon atoms, all alcohols present in said composition being primary alcohols having one normal-alkyl group; and the balance thereof being gasoline.
Claim 5
Dependent Claim
16 words
The composition of claim 2 wherein the surface or interfacial modifying agent is normal pentyl alcohol.
Claim 6
Dependent Claim
16 words
The composition of claim 2 wherein the surface or interfacial modifying agent is normal octyl alcohol.
Claim 7
Dependent Claim
22 words
The composition of claim 1 wherein the methanol content is about 15 to 30 weight percent of the total motor fuel composition.
Claim 8
Dependent Claim
25 words
The composition of claim 2 wherein the surface or interfacial modifying agent is about 0.2 to 4 weight percent of the total motor fuel composition.
Claim 9
Dependent Claim
22 words
The composition of claim 2 wherein the surface or interfacial modifying agent is about 3 to 5 weight percent normal amyl alcohol.
Claim 10
Dependent Claim
22 words
The composition of claim 2 wherein the surface or interfacial modifying agent is about 2 to 4 weight percent normal octyl alcohol.
Claim 11
Dependent Claim
78 words
A motor fuel composition comprising: about 5 to 50 weight percent of an alcohol selected from the group consisting of methanol, ethanol and mixtures thereof; about 0.1 to 5 weight percent of a surface or interfacial modifying agent R'"(CH 2 CH 2 O) x H wherein R'" is an alkyl phenol group where the alkyl group has 5 to 9 carbon atoms and x is an integer from 5 to about 15; and the balance thereof being gasoline.
Claim 12
Dependent Claim
78 words
A motor fuel composition comprising: about 5 to 50 weight percent of an alcohol selected from the group consisting of methanol, ethanol and mixtures thereof; about 0.1 to 5 weight percent of a surface or interfacial modifying agent R'"(CH 2 CH 2 O) x H wherein R'" is an alkyl phenol group where the alkyl group has 5 to 9 carbon atoms and x is an integer from 5 to about 15; and the balance thereof being gasoline.
Claim 13
Dependent Claim
45 words
A motor fuel composition comprising: about 5 to 50 weight percent of an alcohol selected from the group consisting of methanol, ethanol and mixtures thereof; about 0.1 to 5 weight percent of a surface or interfacial modifying agent urea; and the balance thereof being gasoline.
Claim 14
Dependent Claim
45 words
A motor fuel composition comprising: about 5 to 50 weight percent of an alcohol selected from the group consisting of methanol, ethanol and mixtures thereof; about 0.1 to 5 weight percent of a surface or interfacial modifying agent urea; and the balance thereof being gasoline.
Claim 15
Dependent Claim
45 words
A motor fuel composition comprising: about 5 to 50 weight percent of an alcohol selected from the group consisting of methanol, ethanol and mixtures thereof; about 1.0 to 2.0 weight percent of a surface or interfacial modifying agent dioxane; and the balance thereof being gasoline.
Claim 16
Dependent Claim
45 words
A motor fuel composition comprising: about 5 to 50 weight percent of an alcohol selected from the group consisting of methanol, ethanol and mixtures thereof; about 1.0 to 2.0 weight percent of a surface or interfacial modifying agent dioxane; and the balance thereof being gasoline.
Claim 17
Dependent Claim
26 words
The composition of claim 9 wherein the surface or interfacial modifying agent is about 0.3 to 0.5 weight percent R'"(CH 2 CH 2 O) x H.
Claim 18
Dependent Claim
20 words
The composition of claim 10 wherein the surface or interfacial modifying agent is about 0.3 to 0.6 weight percent urea.
Claim 19
Dependent Claim
81 words
A motor fuel composition comprising: about 5 to 50 weight percent of an alcohol selected from the group consisting of methanol, ethanol and mixtures thereof; about 0.5 to 5 weight percent of a surface or interfacial modifying agent consisting of a primary amine having the formula RNH 2 wherein R is a normal alkyl group of 5 to 10 carbon atoms, all amine compounds present in said composition being primary amines having one normal-alkyl group; and the balance thereof being gasoline.
Claim 20
Dependent Claim
81 words
A motor fuel composition comprising: about 5 to 50 weight percent of an alcohol selected from the group consisting of methanol, ethanol and mixtures thereof; about 0.5 to 5 weight percent of a surface or interfacial modifying agent consisting of a primary amine having the formula RNH 2 wherein R is a normal alkyl group of 5 to 10 carbon atoms, all amine compounds present in said composition being primary amines having one normal-alkyl group; and the balance thereof being gasoline.
Claim 21
Dependent Claim
22 words
The composition of claim 14 wherein the surface or interfacial modifying agent is about 1.0 to 2.0 weight percent RNH 2 .
Claim 22
Dependent Claim
10 words
The composition of claim 1 wherein said alcohol is methanol.
Claim 23
Dependent Claim
10 words
The composition of claim 1 wherein the alcohol is ethanol.
Claim 24
Dependent Claim
15 words
The composition of claim 1 wherein said alcohol is a mixture of methanol and ethanol.
Claim 25
Dependent Claim
45 words
A motor fuel composition comprising: about 5 to 50 weight percent of an alcohol selected from the group consisting of methanol, ethanol and mixtures thereof; about 0.01 to 5 weight percent of a surface or interfacial modifying agent dioxane; and the balance thereof being gasoline.
Claim 26
Dependent Claim
45 words
A motor fuel composition comprising: about 5 to 50 weight percent of an alcohol selected from the group consisting of methanol, ethanol and mixtures thereof; about 0.01 to 5 weight percent of a surface or interfacial modifying agent dioxane; and the balance thereof being gasoline.
Claim 27
Dependent Claim
65 words
A motor fuel composition comprising: about 5 to 50 weight percent of an alcohol selected from the group consisting of methanol, ethanol and mixtures thereof; about 0.01 to 5 weight percent of a surface or interfacial modifying agent R" 1 -O-R" 2 wherein R" 1 and R" 2 are each an alkyl group of 2 to 7 carbon atoms; and the balance thereof being gasoline.
Claim 28
Dependent Claim
65 words
A motor fuel composition comprising: about 5 to 50 weight percent of an alcohol selected from the group consisting of methanol, ethanol and mixtures thereof; about 0.01 to 5 weight percent of a surface or interfacial modifying agent R" 1 -O-R" 2 wherein R" 1 and R" 2 are each an alkyl group of 2 to 7 carbon atoms; and the balance thereof being gasoline.
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) | 1986-05-23 | 1986-11-22 | 1987-05-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-05-23 | 1990-11-22 | 1991-05-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-05-23 | 1994-11-22 | 1995-05-24 | $7700.00 | Window Closed / Lapsed |