US3999960A
Expired / Lapsed
US
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Wax crystal modifiers for petroleum oils
Assignee: ExxonMobil Technology and Engineering Co
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Filing: 1974-10-02
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Granted: 1976-12-28
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Expires: 1994-10-02
Abstract
Abstract Materials consisting essentially of hydrocarbons with at least two straight chain alkyl groups are useful as wax crystal modifiers in petroleum oils, particularly middle distillate fuel oils such as heating oils and diesel fuels. These materials can be prepared by dimerizing alpha -olefins, which dimers can be used per se, or can be further derivatized, e.g. polymerized, alkylated on to an aromatic molecule, etc.
Inventors
- 👤 Arthur W. Langer, Jr.
- 👤 Wladimir Philippoff
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 06:55
CPC Classifications
C; C10; C10L; C10L1/00; C10L1/10; C10L1/14; C10L1/18; C10L1/185; C10L1/1852; C10L1/16; C10L1/19; C10L1/20; C10L1/202; C10L1/22; C10L1/222; C10L1/223; C10L1/23; C10L1/231; C10L1/1608; C10L1/1625; C10L1/1633; C10L1/1641; C10L1/1691; F; F02; F02B; F02B3/00; F02B3/06
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
126 words
A composition comprising a major amount of a petroleum distillate fuel oil that has been improved in its cold flow properties by containing about 0.01 to 2 percent by weight of a cold flow improver selected from the group consisting of a dimer of a C 18 or C 19 alpha olefin, a polymer of such dimer, and an aromatic alkylated with a dimer of an alpha olefin selected from the group of dimers consisting of the C 32 , C 34 , C 36 , C 38 , C 40 , and C 44 dimers, said aromatic being selected from the group consisting of benzene, benzene alkylated with from 1 to 20 carbon atoms in alkyl groups, triphenylmethane, a phenyl ether of benzene, and phenoxybiphenyl.
Claim 2
Dependent Claim
126 words
A composition comprising a major amount of a petroleum distillate fuel oil that has been improved in its cold flow properties by containing about 0.01 to 2 percent by weight of a cold flow improver selected from the group consisting of a dimer of a C 18 or C 19 alpha olefin, a polymer of such dimer, and an aromatic alkylated with a dimer of an alpha olefin selected from the group of dimers consisting of the C 32 , C 34 , C 36 , C 38 , C 40 , and C 44 dimers, said aromatic being selected from the group consisting of benzene, benzene alkylated with from 1 to 20 carbon atoms in alkyl groups, triphenylmethane, a phenyl ether of benzene, and phenoxybiphenyl.
Claim 3
Dependent Claim
20 words
A composition according to claim 1, wherein said cold flow improver is a dimer of a C 18 alpha olefin.
Claim 4
Dependent Claim
20 words
A composition according to claim 1, wherein said cold flow improver is a dimer of a C 19 alpha olefin.
Claim 5
Dependent Claim
24 words
A composition according to claim 1, wherein said cold flow improver is the product of polymerizing the dimer of a C 19 alpha olefin.
Claim 6
Dependent Claim
50 words
A composition according to claim 1, wherein said cold flow improver comprises diphenyl ether alkylated with the dimer of an alpha olefin selected from the group of dimers consisting of the C 32 , C 34 , C 36 , C 38 , C 40 , and C 44 dimers.
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) | 1979-12-28 | 1980-06-28 | 1980-12-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-12-28 | 1984-06-28 | 1984-12-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-12-28 | 1988-06-28 | 1988-12-28 | $7700.00 | Window Closed / Lapsed |