US4527581A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Compositions for and method of reducing hydrocarbon fluid friction loss in conduits
Assignee: Atlantic Richfield Co
•
Filing: 1983-06-23
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Granted: 1985-07-09
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Expires: 2003-06-23
Abstract
Abstract Friction loss normally occurring in hydrocarbon carrying conduits during the transportation of hydrocarbon liquids is reduced by adding to the hydrocarbon liquids small amounts of copolymers of butene-1 and another alpha-monoolefin having 5 to 20 carbon atoms.
Inventors
- 👤 John Motier
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 07:47
CPC Classifications
C; C10; C10L; C10L10/00; C10L10/08; C08; C08F; C08F210/00; C08F210/04; C08F210/08; C09; C09K; C09K3/00; C10L1/00; C10L1/10; C10L1/14; C10L1/16; C10L1/1625; C10L1/1633; C10L1/1641; Y; Y10; Y10T; Y10T137/00; Y10T137/0318; Y10T137/0391
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
97 words
A process for reducing friction loss in hydrocarbon liquids flowing through conduits comprising adding to the hydrocarbon liquids, in an amount varying from the minimum amount effective to reduce friction loss to about 1000 ppm, a copolymer of butene-1 and at least one other alpha-monoolefin having 5 to 20 carbon atoms and having a weight average molecular weight of at least about 1 million, said copolymer containing about 10 to 90 mole percent units derived from said other alpha-monoolefin component based on the total number of moles of butene-1 and said other alpha-monoolefin component in the copolymer.
Claim 2
Dependent Claim
97 words
A process for reducing friction loss in hydrocarbon liquids flowing through conduits comprising adding to the hydrocarbon liquids, in an amount varying from the minimum amount effective to reduce friction loss to about 1000 ppm, a copolymer of butene-1 and at least one other alpha-monoolefin having 5 to 20 carbon atoms and having a weight average molecular weight of at least about 1 million, said copolymer containing about 10 to 90 mole percent units derived from said other alpha-monoolefin component based on the total number of moles of butene-1 and said other alpha-monoolefin component in the copolymer.
Claim 3
Dependent Claim
23 words
The process of claim 1 wherein said copolymer is added to the hydrocarbon liquid at a concentration of about 2 to 500 ppm.
Claim 4
Dependent Claim
25 words
The process of claim 1 wherein said copolymer contains about 25-75 mole percent butene-1 units based on the total amount of copolymer in the composition.
Claim 5
Dependent Claim
16 words
The process of claim 1 wherein said other alpha-monoolefin component has 6 to 14 carbon atoms.
Claim 6
Dependent Claim
18 words
The process of either claims 2 or 3 wherein said other alpha-monoolefin has 6 to 14 carbon atoms.
Claim 7
Dependent Claim
21 words
The process of claims 1, 2 or 3 wherein said other alpha-monoolefin is hexene-1, octene-1, dodecene-1, tetradecene-1 or mixtures of these.
Claim 8
Dependent Claim
16 words
The process of claims 1, 2, 3 or 4 wherein said hydrocarbon liquid is crude oil.
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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) | 1988-07-08 | 1989-01-07 | 1989-07-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-07-08 | 1993-01-07 | 1993-07-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-07-08 | 1997-01-07 | 1997-07-09 | $7700.00 | Window Closed / Lapsed |