US4713088A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Middle distillate compositions with improved cold flow properties
Assignee: ExxonMobil Chemical Patents Inc
•
Filing: 1985-02-20
•
Granted: 1987-12-15
•
Expires: 2005-02-20
Abstract
Abstract The low temperature properties of a distillate petroleum fuel oil boiling in the range 120° C. to 500° C., and whose 20% and 90% distillation points differ by less than 100° C., and/or whose Final Boiling Point is in the range 340° C. to 370° C. are improved by the addition of a polymer or copolymer having at least 25 wt. % of n-alkyl groups of average number of carbon atoms from 12 to 14 with no more than 10 wt. % containing more than 14 carbon atoms.
Inventors
- 👤 Robert D. Tack
- 👤 Sarah L. Pearce
- 👤 Albert Rossi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 16:50
CPC Classifications
C; C10; C10L; C10L1/00; C10L1/10; C10L1/14; C10L1/20; C10L1/18; C10L1/192; C10L1/195; C10L1/196; C10L1/1963; C10L1/143; C10L1/146; C10L1/1966; C10L1/197; C10L1/1973; C10L1/198; C10L1/1985; C10L1/22; C10L1/222; C10L1/2222; C10L1/224; C10L1/234; C10L1/238; C10L1/2383
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
122 words
A distillate petroleum fuel oil boiling in the range of 120° to 500° C. having a cold flow property improving amount of a copolymer present therein, said copolymer consisting essentially of polyvinylester containing at least 25 weight percent of repeating monomer units of monoethylenically unsaturated C 4 to C 8 mono- or dicarboxylic acids esterified with at least 2 different n-alkyl groups wherein (1) said n-alkyl groups have an average number of carbon atoms of from 12 to 14; (2) no more than 10 wt. % of said esterified monomer units contain n-alkyl groups having more than 14 carbon atoms; and (3) no more than 20 wt. % of said esterified monomer units contain n-alkyl groups having fewer than 12 carbon atoms.
Claim 2
Dependent Claim
122 words
A distillate petroleum fuel oil boiling in the range of 120° to 500° C. having a cold flow property improving amount of a copolymer present therein, said copolymer consisting essentially of polyvinylester containing at least 25 weight percent of repeating monomer units of monoethylenically unsaturated C 4 to C 8 mono- or dicarboxylic acids esterified with at least 2 different n-alkyl groups wherein (1) said n-alkyl groups have an average number of carbon atoms of from 12 to 14; (2) no more than 10 wt. % of said esterified monomer units contain n-alkyl groups having more than 14 carbon atoms; and (3) no more than 20 wt. % of said esterified monomer units contain n-alkyl groups having fewer than 12 carbon atoms.
Claim 3
Dependent Claim
57 words
The distillate petroleum fuel oil of claim 1 wherein said fuel oil is sharply fractionated having (a) its 20 to 90% distillation points differ by less than 100° C., (b) its 90% distillation to final boiling points differ by 10° to 25° C. and (c) a final boiling point in the range of 240° to 380° C.
Claim 4
Dependent Claim
33 words
The distillate petroleum fuel oil of claim 1 wherein said polyvinylester contains from about 10 to 50 wt. % of comonomer selected from the group consisting of alkyl acrylate, methacrylate and mixtures thereof.
Claim 5
Dependent Claim
22 words
The distillate petroleum fuel oil of claim 1 wherein said repeating esterified monomer units of the polyvinylester comprise dialkyl fumarate monomer units.
Claim 6
Dependent Claim
33 words
The distillate petroleum fuel oil of claim 4 wherein said polyvinylester contains from 60 to 40 mole % of vinyl acetate monomer units and 40 to 60 mole % dialkyl fumarate monomer units.
Claim 7
Dependent Claim
26 words
The distillate petroleum fuel oil of claim 5 wherein all the n-alkyl groups of said dialkyl fumarate comonomer units contain from 12 to 14 carbon atoms.
Claim 8
Dependent Claim
32 words
The distillate petroleum fuel oil of claim 4 wherein the n-alkyl groups of said dialkyl fumarate monomer units are about a 50/50 molar mixture of C 12 and C 14 alkyl groups.
Claim 9
Dependent Claim
21 words
The distillate petroleum fuel oil of claim 1 which contains from about 0.001 to about 0.5 wt. % of said polyvinylester.
Claim 10
Dependent Claim
18 words
The distillate petroleum fuel oil of claim 1 which further contains a copolymer of ethylene and vinyl acetate.
Claim 11
Dependent Claim
110 words
An additive concentrate comprising an oil solution containing 3 to 75 wt. % of a copolymer consisting essentially of polyvinylester containing at least 25 wt. % of repeating monomer units of mono-ethylenically unsaturated C 4 to C 8 mono- or dicarboxylic acids esterified with at least two different n-alkyl groups wherein (1) said n-alkyl groups have an average number of carbon atoms of from 12 to 14; (2) no more than 10 wt. % of said esterified monomer units contain n-alkyl groups having more than 14 carbon atoms; and (3) no more than 20 wt. % of said esterified monomer units contain n-alkyl groups having fewer than 12 carbon atoms.
Claim 12
Dependent Claim
110 words
An additive concentrate comprising an oil solution containing 3 to 75 wt. % of a copolymer consisting essentially of polyvinylester containing at least 25 wt. % of repeating monomer units of mono-ethylenically unsaturated C 4 to C 8 mono- or dicarboxylic acids esterified with at least two different n-alkyl groups wherein (1) said n-alkyl groups have an average number of carbon atoms of from 12 to 14; (2) no more than 10 wt. % of said esterified monomer units contain n-alkyl groups having more than 14 carbon atoms; and (3) no more than 20 wt. % of said esterified monomer units contain n-alkyl groups having fewer than 12 carbon atoms.
Claim 13
Dependent Claim
31 words
The additive concentrate of claim 10 wherein said polyvinylester contains from about 10 to 50 wt. % of comonomer selected from the group consisting of alkyl acrylate, methacrylate and mixtures thereof.
Claim 14
Dependent Claim
20 words
The additive concentrate of claim 11 wherein said repeating esterified monomer units of the polyvinylester comprise dialkyl fumarate monomer units.
Claim 15
Dependent Claim
31 words
The additive concentrate of claim 12 wherein said polyvinylester contains from 60 to 40 mole % of vinyl acetate monomer units and 40 to 60 mole % dialkyl fumarate monomer units.
Claim 16
Dependent Claim
24 words
The additive concentrate of claim 13 wherein all the n-alkyl groups of said dialkyl fumarate comonomer units contain from 12 to 14 carbon atoms.
Claim 17
Dependent Claim
30 words
The additive concentrate of claim 12 wherein the n-alkyl groups of said dialkyl fumarate monomer units are about a 50/50 molar mixture of C 12 and C 14 alkyl groups.
References Cited (Backward Citations)
GB573364A
Cited
US2655479A
Cited
US2824840A
Cited
US3048479A
Cited
US3252771A
Cited
US3413103A
Cited
US4087255A
Cited
GB1263152A
Cited
US3981850A
Cited
US3726653A
Cited
US3961916A
Cited
GB1469016A
Cited
US4175926A
Cited
US4153424A
Cited
US4153423A
Cited
US4153422A
Cited
GB2023645A
Cited
US4211534A
Cited
US4261703A
Cited
US4210424A
Cited
EP0061895B1
Cited
EP0618942A1
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-12-14 | 1991-06-15 | 1991-12-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-12-14 | 1995-06-15 | 1995-12-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-12-14 | 1999-06-15 | 1999-12-15 | $7700.00 | Window Closed / Lapsed |