US4342797A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Wet flow characteristic of coal and other water-insoluble solid particles
Assignee: Ecolab Inc
•
Filing: 1979-07-05
•
Granted: 1982-08-03
•
Expires: 1999-07-05
Abstract
Abstract The wet flow characteristic of water-insoluble solid particles such as coal is enhanced by forming on the surface of the solid particles a coating of a fluid having the property of lowering surface tension in aqueous solution, preferably a water solution of a substance from the group consisting of methyl and dimethyl naphthalene sulfonates and ethoxylated linear secondary alcohols, the substances being highly water soluble and the water solution having a low viscosity, a high flash point and low toxicity.
Inventors
- 👤 Alfred E. Kober
- 👤 Mark O. Kestner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 04:44
CPC Classifications
C; C10; C10L; C10L9/00; C10L9/10
Claims Analysis
Total Claims: 26
Claim 1
Independent Claim
112 words
The method of improving the flow characteristics of wet, small water-insoluble solid particles which comprises (a) forming wet particles which have a surface coating of a fluid having the property of lowering surface tension in aqueous solution, said fluid comprises a water solution of a substance from the group consisting of methyl and dimethyl naphthalene sulfonates and ethoxylated linear secondary (C 11 -C 15 ) alcohols, said water solution having a low viscosity, a high flash point, low toxicity, and (b) causing said particles to flow from one location to another, whereby caking tendencies of the wet particles are inhibited and freedom of flow of said particles between said locations is enhanced.
Claim 2
Independent Claim
112 words
The method of improving the flow characteristics of wet, small water-insoluble solid particles which comprises (a) forming wet particles which have a surface coating of a fluid having the property of lowering surface tension in aqueous solution, said fluid comprises a water solution of a substance from the group consisting of methyl and dimethyl naphthalene sulfonates and ethoxylated linear secondary (C 11 -C 15 ) alcohols, said water solution having a low viscosity, a high flash point, low toxicity, and (b) causing said particles to flow from one location to another, whereby caking tendencies of the wet particles are inhibited and freedom of flow of said particles between said locations is enhanced.
Claim 3
Dependent Claim
39 words
The method of claim 1, in which said particles are capable of absorbing an aqueous fluid and said coating is formed by treating said particles with said fluid in an amount in excess of that which said particles absorb.
Claim 4
Dependent Claim
16 words
The method of claim 2, in which said substance constitutes at least 10% of said fluid.
Claim 5
Dependent Claim
15 words
The method of claim 2, in which said substance constitutes about 20% of said fluid.
Claim 6
Dependent Claim
16 words
The method of claim 1, in which said substance comprises at least 10% of said fluid.
Claim 7
Dependent Claim
15 words
The method of claim 1, in which said substance comprises about 20% of said fluid.
Claim 8
Dependent Claim
14 words
The method of claim 1 in which said water-insoluble solid particles comprise coal particles.
Claim 9
Dependent Claim
16 words
The method of claim 7, in which said substance constitutes at least 10% of said fluid.
Claim 10
Dependent Claim
15 words
The method of claim 7, in which said substance constitutes about 20% of said fluid.
Claim 11
Dependent Claim
22 words
The method of claim 2, in which said fluid comprises a water solution of one or more methyl and dimethyl naphthalene sulfonates.
Claim 12
Dependent Claim
16 words
The method of claim 10, in which said substance constitutes at least 10% of said fluid.
Claim 13
Dependent Claim
15 words
The method of claim 10, in which said substance constitutes about 20% of said fluid.
Claim 14
Dependent Claim
14 words
The method of claim 10 in which said water-insoluble solid particles comprise coal particles.
Claim 15
Dependent Claim
22 words
The method of claim 1 in which said fluid comprises a water solution of one or more methyl and dimethyl naphthalene sulfonates.
Claim 16
Dependent Claim
16 words
The method of claim 14, in which said substance constitutes at least 10% of said fluid.
Claim 17
Dependent Claim
15 words
The method of claim 14, in which said substance constitutes about 20% of said fluid.
Claim 18
Dependent Claim
14 words
The method of claim 14 in which said water-insoluble solid particles comprise coal particles.
Claim 19
Dependent Claim
26 words
The method of claim 2 in which said fluid comprises a water solution of one or more ethoxylated linear secondary (C 11 -C 15 ) alcohols.
Claim 20
Dependent Claim
16 words
The method of claim 18, in which said substance constitutes at least 10% of said fluid.
Claim 21
Dependent Claim
15 words
The method of claim 18, in which said substance constitutes about 20% of said fluid.
Claim 22
Dependent Claim
14 words
The method of claim 18 in which said water-insoluble solid particles comprise coal particles.
Claim 23
Dependent Claim
26 words
The method of claim 1 in which said fluid comprises a water solution of one or more ethoxylated linear secondary (C 11 -C 15 ) alcohols.
Claim 24
Dependent Claim
16 words
The method of claim 22, in which said substance constitutes at least 10% of said fluid.
Claim 25
Dependent Claim
15 words
The method of claim 22, in which said substance constitutes about 20% of said fluid.
Claim 26
Dependent Claim
14 words
The method of claim 22 in which said water-insoluble solid particles comprise coal particles.
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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) | 1985-08-02 | 1986-02-01 | 1986-08-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-08-02 | 1990-02-01 | 1990-08-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-08-02 | 1994-02-01 | 1994-08-03 | $7700.00 | Window Closed / Lapsed |