US4021207A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Liquid hydrocarbon compositions of improved behavior in the cold and containing diene polymers
Assignee: IFP Energies nouvelles
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Filing: 1974-11-27
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Granted: 1977-05-03
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Expires: 1994-11-27
Abstract
Abstract The behavior in the cold of crude oil or petroleum distillates may be improved by incorporation of polymeric substances such as a hydrogenated polybutadiene or a hydrogenated copolymer of butadiene with at least one conjugated aliphatic diolefin of 5-8 carbon atoms. The additive is active at concentrations of from 10 to 1,000 grams per m3 of oil.
Inventors
- 👤 Jean-Pierre Durand
- 👤 Bernard Aubin
- 👤 Francois Dawans
- 👤 Gilbert Chapelet
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 11:52
CPC Classifications
C; C10; C10L; C10L1/00; C10L1/10; C10L1/14; C10L1/16; C10L1/1625; C10L1/1633; C10L1/1658; C08; C08C; C08C19/00; C08C19/02
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
119 words
A composition of petroleum middle distillate of lowered limit filterability temperature, comprising a major amount of a petroleum middle distillate and from 10 to 1,000 g/m 3 of at least one hydrogenated copolymer of 1,3-butadiene and at least one different conjugated aliphatic diolefin selected from the group consisting of isoprene and 1,3-pentadiene, wherein said hydrogenated copolymer contains from 20 to 90% of butadiene units and from 10 to 80% of units derived from said different conjugated diolefin, and has a microstructure, as determined before hydrogenation, of at least about 90% of 1,4-addition units, a number average molecular weight of 500 to 20,000 and an olefinic unsaturation ratio of not more than 40% of the units constituting the polymeric chain.
Claim 2
Dependent Claim
119 words
A composition of petroleum middle distillate of lowered limit filterability temperature, comprising a major amount of a petroleum middle distillate and from 10 to 1,000 g/m 3 of at least one hydrogenated copolymer of 1,3-butadiene and at least one different conjugated aliphatic diolefin selected from the group consisting of isoprene and 1,3-pentadiene, wherein said hydrogenated copolymer contains from 20 to 90% of butadiene units and from 10 to 80% of units derived from said different conjugated diolefin, and has a microstructure, as determined before hydrogenation, of at least about 90% of 1,4-addition units, a number average molecular weight of 500 to 20,000 and an olefinic unsaturation ratio of not more than 40% of the units constituting the polymeric chain.
Claim 3
Dependent Claim
30 words
A composition according to claim 1, wherein said hydrogenated copolymer contains from 40 to 70% of butadiene units and from 30 to 60% of units from said different conjugated diolefin.
Claim 4
Dependent Claim
26 words
A composition according to claim 1, wherein said hydrogenated copolymer has an olefinic unsaturation ratio of at least 5% of the units constituting the polymeric chain.
Claim 5
Dependent Claim
16 words
A composition according to claim 1, wherein said hydrogenated copolymer is a substantially completely hydrogenated copolymer.
Claim 6
Dependent Claim
18 words
A composition according to claim 1, wherein said hydrogenated copolymer is a hydrogenated copolymer of 1,3-butadiene with isoprene.
Claim 7
Dependent Claim
18 words
A composition according to claim 1, wherein said hydrogenated copolymer is a hydrogenated copolymer of 1,3-butadiene with 1,3-pentadiene.
Claim 8
Dependent Claim
22 words
A composition according to claim 1, wherein said hydrogenated copolymer has an average molecular weight by number of from 1,000 to 10,000.
Claim 9
Dependent Claim
18 words
A composition according to claim 1, wherein the proportion of said hydrogenated copolymer is 50-500 g/m3 of composition.
Claim 10
Dependent Claim
14 words
A composition according to claim 1, said composition comprising a major proportion of gas-oil.
Claim 11
Dependent Claim
14 words
A composition according to claim 1, said composition comprising a major proportion of fuel-oil.
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) | 1980-05-02 | 1980-11-01 | 1981-05-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-05-02 | 1984-11-01 | 1985-05-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-05-02 | 1988-11-01 | 1989-05-03 | $7700.00 | Window Closed / Lapsed |