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Patent US4305688A successfully refreshed from Google Patents.
US4305688A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Transporting particulate solid material as a slurry through a pipeline
Assignee: Mobil Oil AS
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Filing: 1980-02-19
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Granted: 1981-12-15
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Expires: 2000-02-19
Abstract
Abstract This specification discloses a method of transporting particulate solid material as a slurry through a pipeline. A pumpable slurry is formed of the particulate solid material in a solution of alcohol and water as a carrier liquid having an additive therein to thicken it. The slurry is pumped through the pipeline to transport the particulate solid material to a desired location.
Inventors
- 👤 Joseph G. Savins
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 21:21
CPC Classifications
F; F17; F17D; F17D1/00; F17D1/08; F17D1/088; B; B01; B01J; B01J19/00; B01J19/06; B65; B65G; B65G53/00; B65G53/30
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
99 words
A method of transporting particulate solid material as a slurry through a pipeline, comprising the steps of: (a) providing a carrier liquid comprised of a solution of alcohol and water, said water being present in an amount within the range of 10 to 75 weight percent of said solution; (b) mixing an additive into said carrier liquid in an amount of at least 0.10 weight percent of said solution of thicken said carrier liquid; (c) mixing particulate solid material into said carrier liquid containing said additive to form a pumpable slurry; and (d) pumping said slurry through said pipeline.
Claim 2
Independent Claim
99 words
A method of transporting particulate solid material as a slurry through a pipeline, comprising the steps of: (a) providing a carrier liquid comprised of a solution of alcohol and water, said water being present in an amount within the range of 10 to 75 weight percent of said solution; (b) mixing an additive into said carrier liquid in an amount of at least 0.10 weight percent of said solution of thicken said carrier liquid; (c) mixing particulate solid material into said carrier liquid containing said additive to form a pumpable slurry; and (d) pumping said slurry through said pipeline.
Claim 3
Dependent Claim
32 words
The method of claim 1 wherein said additive is selected from the group consisting of hydroxymethylcellulose, carboxymethylhydroxyethylcellulose, and polyethylene oxide and mixtures thereof and wherein said particulate solid material is particulate coal.
Claim 4
Dependent Claim
41 words
The method of claim 2 wherein said alcohol is methanol, said water in said alcohol and water solution is present in an amount within the range of about 15 to 75 weight percent of said solution, and said additive is hydroxyethylcellulose.
Claim 5
Dependent Claim
27 words
The method of claim 3 wherein said water in said alcohol and water solution is present in an amount of about 75 weight percent of said solution.
Claim 6
Dependent Claim
41 words
The method of claim 2 wherein said alcohol is methanol, said water in said alcohol and water solution is present in an amount within the range of about 35 to 75 weight percent based on said solution, said additive is carboxymethylhydroxyethylcellulose.
Claim 7
Dependent Claim
37 words
The method of claim 2 wherein said alcohol is methanol, said water in said alcohol and water solution is present in an amount of about 50 weight percent of said solution, and said additive is polyethylene oxide.
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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) | 1984-12-14 | 1985-06-15 | 1985-12-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-12-14 | 1989-06-15 | 1989-12-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-12-14 | 1993-06-15 | 1993-12-15 | $7700.00 | Window Closed / Lapsed |