US4261702A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Novel process for preparation of gasohol
Assignee: Texaco Inc
•
Filing: 1980-04-07
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Granted: 1981-04-14
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Expires: 2000-04-07
Abstract
Abstract Gasoline and aqueous alcohol, such as 95 w % ethanol, are mixed to form wet two-phase gasahol (including a hydrocarbon phase and a water phase); and the water-phase is separated and reacted with a ketal, acetal, or orthoester to form a dry composition which is blended back into the gasoline-phase to form a dry gasahol.
Inventors
- 👤 William M. Sweeney
- 👤 Sheldon Herbstman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 17:20
CPC Classifications
C; C10; C10L; C10L1/00; C10L1/02; C10L1/023; C10L1/026
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
113 words
The method which comprises (i) mixing a liquid hydrocarbon fuel and aqueous alcohol thereby forming a two-phase wet hydrocarbon fuel including (i) an upper hydrocarbon-rich phase and (ii) a lower phase containing alcohol and water; (ii) separating said lower phase containing alcohol and water from said upper hydrocarbon-rich phase; (iii) reacting said lower phase containing alcohol and water at pH below 7 with a ketal, an acetal, or an orthoester whereby said ketal, acetal, or orthoester reacts with said water thereby forming a substantially water-free composition; (iv) blending said water-free composition and said upper hydrocarbon-rich phase thereby forming a single phase dry hydrocarbon product; and (v) recovering said single phase dry hydrocarbon product.
Claim 2
Independent Claim
113 words
The method which comprises (i) mixing a liquid hydrocarbon fuel and aqueous alcohol thereby forming a two-phase wet hydrocarbon fuel including (i) an upper hydrocarbon-rich phase and (ii) a lower phase containing alcohol and water; (ii) separating said lower phase containing alcohol and water from said upper hydrocarbon-rich phase; (iii) reacting said lower phase containing alcohol and water at pH below 7 with a ketal, an acetal, or an orthoester whereby said ketal, acetal, or orthoester reacts with said water thereby forming a substantially water-free composition; (iv) blending said water-free composition and said upper hydrocarbon-rich phase thereby forming a single phase dry hydrocarbon product; and (v) recovering said single phase dry hydrocarbon product.
Claim 3
Dependent Claim
14 words
The method claimed in claim 1 wherein said liquid hydrocarbon fuel is a gasoline.
Claim 4
Dependent Claim
15 words
The method claimed in claim 1 wherein said liquid hydrocarbon fuel is a fuel oil.
Claim 5
Dependent Claim
15 words
The method claimed in claim 1 wherein said liquid hydrocarbon fuel is a furnace oil.
Claim 6
Dependent Claim
11 words
The method claimed in claim 1 wherein said alcohol is methanol.
Claim 7
Dependent Claim
11 words
The method claimed in claim 1 wherein said alcohol is ethanol.
Claim 8
Dependent Claim
14 words
The method claimed in claim 1 wherein said alcohol is 95 w % ethanol.
Claim 9
Dependent Claim
12 words
The method claimed in claim 1 wherein said ketal is 2,2-dimethoxy propane.
Claim 10
Dependent Claim
12 words
The method claimed in claim 1 wherein said orthoester is ethyl orthoformate.
Claim 11
Independent Claim
110 words
The method which comprises (i) mixing gasoline and wet ethanol thereby forming a two-phase wet hydrocarbon fuel including (i) an upper gasoline-rich phase and (ii) a lower phase containing ethanol and water; (ii) separating said lower phase containing ethanol and water from said upper gasoline-rich phase; (iii) reacting said lower phase containing ethanol and water at pH below 7 with a ketal, an acetal, or an orthoester whereby said ketal, acetal, or orthoester reacts with said water thereby forming a substantially water-free composition; (iv) blending said water-free composition and said upper gasoline-rich phase thereby forming a single phase dry gasoline product; and (v) recovering said single phase dry gasoline product.
Claim 12
Independent Claim
110 words
The method which comprises (i) mixing gasoline and wet ethanol thereby forming a two-phase wet hydrocarbon fuel including (i) an upper gasoline-rich phase and (ii) a lower phase containing ethanol and water; (ii) separating said lower phase containing ethanol and water from said upper gasoline-rich phase; (iii) reacting said lower phase containing ethanol and water at pH below 7 with a ketal, an acetal, or an orthoester whereby said ketal, acetal, or orthoester reacts with said water thereby forming a substantially water-free composition; (iv) blending said water-free composition and said upper gasoline-rich phase thereby forming a single phase dry gasoline product; and (v) recovering said single phase dry gasoline product.
Claim 13
Dependent Claim
15 words
The method claimed in claim 10 wherein said wet ethanol is 95 w % ethanol.
Claim 14
Dependent Claim
12 words
The method claimed in claim 10 wherein said ketal is 2,2-dimethoxy propane.
References Cited (Backward Citations)
US1582420A
Cited
US2842432A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-04-13 | 1984-10-13 | 1985-04-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-04-13 | 1988-10-13 | 1989-04-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-04-13 | 1992-10-13 | 1993-04-14 | $7700.00 | Window Closed / Lapsed |