Patent US4508128A successfully refreshed from Google Patents.
US4508128A
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Drag reduction agent for hydrocarbon liquid
Assignee: ExxonMobil Technology and Engineering Co
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Filing: 1983-11-02
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Granted: 1985-04-02
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Expires: 2003-11-02
Abstract
Abstract The present invention relates to improved drag reduction agents which are polymer complexes of a cationic polymer and an anionic polymer.
Inventors
- 👤 Ralph M. Kowalik
- 👤 Ilan Duvdevani
- 👤 Dennis G. Peiffer
- 👤 Robert D. Lundberg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 18:01
CPC Classifications
C; C09; C09K; C09K3/00; C08; C08F; C08F8/00; C08F8/44; C08L; C08L25/00; C08L25/02; C08L25/04; C08L25/18; C08F2800/00; C08F2800/10; Y; Y10; Y10T; Y10T137/00; Y10T137/0318; Y10T137/0391
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
157 words
A process for decreasing the frictional drag of a hydrocarbon liquid flowing through a pipe or conduit having a continuous bore therethrough, which comprises the step of adding a polymer complex of an anionic polymer and a cationic polymer to said hydrocarbon liquid at a concentration level of about 0.001 to about 1.0 gram per 100 ml. of said hydrocarbon liquid, said cationic polymer being a styrene vinyl pyridine copolymer, said styrene vinyl pyridine copolymer containing about 0.5 to about 50 weight percent of vinyl pyridine, said anionic polymer being a neutralized sulfonated polymer having about 0.1 to about 25 mole percent sulfonate groups, said sulfonate groups being at least 50% neutralized with a transition metal ion, said sulfonated polymer having a molecular weight as measured by GPC of about 1,000 to about 10,000,000 and said sulfonated polymer having a polymeric backbone selected from the group consisting of polystyrene, t-butylstyrene, ethylene propylene terpolymers, polyisobutylene, ethylene and polyisoprene.
Claim 2
Dependent Claim
157 words
A process for decreasing the frictional drag of a hydrocarbon liquid flowing through a pipe or conduit having a continuous bore therethrough, which comprises the step of adding a polymer complex of an anionic polymer and a cationic polymer to said hydrocarbon liquid at a concentration level of about 0.001 to about 1.0 gram per 100 ml. of said hydrocarbon liquid, said cationic polymer being a styrene vinyl pyridine copolymer, said styrene vinyl pyridine copolymer containing about 0.5 to about 50 weight percent of vinyl pyridine, said anionic polymer being a neutralized sulfonated polymer having about 0.1 to about 25 mole percent sulfonate groups, said sulfonate groups being at least 50% neutralized with a transition metal ion, said sulfonated polymer having a molecular weight as measured by GPC of about 1,000 to about 10,000,000 and said sulfonated polymer having a polymeric backbone selected from the group consisting of polystyrene, t-butylstyrene, ethylene propylene terpolymers, polyisobutylene, ethylene and polyisoprene.
Claim 3
Dependent Claim
46 words
The process according to claim 1, wherein weight ratio between the dissolved sulfonated polymer and the dissolved basic nitrogen-containing polymer is about 0.2 to about 30, or wherein stoichiometric ratio between sulfonate and basic nitrogen groups of the dissolved polymers is about 0.1 to about 10.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-04-01 | 1988-10-01 | 1989-04-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-04-01 | 1992-10-01 | 1993-04-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-04-01 | 1996-10-01 | 1997-04-02 | $7700.00 | Window Closed / Lapsed |