Patent US4163079A successfully refreshed from Google Patents.
US4163079A
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Method for facilitating transportation of particulate on a conveyor belt in a cold environment
Assignee: Dow Chemical Co
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Filing: 1977-12-14
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Granted: 1979-07-31
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Expires: 1997-12-14
Abstract
Abstract Coal and other particulate can be transported on a conveyor belt exposed to winter weather conditions with reduced slippage of the particulate on the belt surface by periodically treating the belt surface with from about 0.001 to about 0.005 gallons per square foot of belt surface (0.04-0.2 liters/sq. meter) of a composition consisting substantially of water soluble components comprising (A) a water soluble polyhydroxy compound or monoalkyl ether thereof, and (B) a water soluble organic nonvolatile compound having at least one hydrophilic group, (A) being different from (B). The treating composition may also include a small amount of a polydimethyl siloxane if desired.
Inventors
- 👤 Frank J. Beafore
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 06:53
CPC Classifications
C; C09; C09K; C09K3/00; C09K3/18; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31855
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
149 words
A method for facilitating transportation of particulate solids on a conveyor belt, at least a portion of which is exposed to a temperature of less than 0° C., comprising: (a) contacting the surface of said belt upon which the particulate solids are transported with from about 0.001 to about 0.005 gallons per square foot of belt surface, of a composition consisting substantially of water soluble components comprising (A) a water soluble polyhydroxy compund or monoalkyl ether thereof, and (B) a water soluble organic nonvolatile compound having at least one hydrophilic group, said compound (B) being different from said compound (A), said composition being substantially free of corrosion inducing metal halide salts; (b) placing particulate solids on the treated belt; (c) moving the belt so that said solids are transported; and (d) exposing at least a portion of the treated belt surface to a temperature of less than 0° C.
Claim 2
Independent Claim
149 words
A method for facilitating transportation of particulate solids on a conveyor belt, at least a portion of which is exposed to a temperature of less than 0° C., comprising: (a) contacting the surface of said belt upon which the particulate solids are transported with from about 0.001 to about 0.005 gallons per square foot of belt surface, of a composition consisting substantially of water soluble components comprising (A) a water soluble polyhydroxy compund or monoalkyl ether thereof, and (B) a water soluble organic nonvolatile compound having at least one hydrophilic group, said compound (B) being different from said compound (A), said composition being substantially free of corrosion inducing metal halide salts; (b) placing particulate solids on the treated belt; (c) moving the belt so that said solids are transported; and (d) exposing at least a portion of the treated belt surface to a temperature of less than 0° C.
Claim 3
Dependent Claim
31 words
The method of claim 1 wherein said belt is in substantially continuous service and said step (a) is carried out periodically, with from about one to about eight hours between treatments.
Claim 4
Dependent Claim
11 words
The method of claim 1 wherein the particulate solid is coal.
Claim 5
Dependent Claim
16 words
The method of claim 1 wherein the hydrophilic group in (B) is amine, carboxyl, or carboxylate.
Claim 6
Dependent Claim
11 words
The method of claim 1 wherein the polyhydroxy compound is aliphatic.
Claim 7
Dependent Claim
13 words
The method of claim 1 wherein (A) is at least one alkylene glycol.
Claim 8
Dependent Claim
21 words
The method of claim 6 wherein (B) is selected from the group consisting of polyacrylamide, glacial acetic acid, and sodium acetate.
Claim 9
Dependent Claim
11 words
The method of claim 7 wherein (A) consists of ethylene glycol.
Claim 10
Dependent Claim
12 words
The method of claim 8 wherein (B) consists of glacial acetic acid.
Claim 11
Dependent Claim
23 words
The method of claim 6 wherein (A) consists of a mixture of ethylene glycol and propylene glycol and (B) consists of sodium acetate.
Claim 12
Dependent Claim
26 words
The method of claim 10 wherein the ethylene glycol, propylene glycol and sodium acetate are present in a weight ratio to one another of about 40-60:60-40:5.
Claim 13
Dependent Claim
20 words
The method of claim 11 wherein the particulate is coal having a particle size of less than about 2 inches.
Claim 14
Dependent Claim
20 words
The method of claim 1 wherein the weight ratio of (B) and (A) is from about 0.001:1 to about 2:1.
Claim 15
Dependent Claim
21 words
The method of claim 1 wherein the rate of application is from about 0.002 to about 0.004 gallons per square foot.
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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) | 1982-07-30 | 1983-01-29 | 1983-07-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-07-30 | 1987-01-29 | 1987-07-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-07-30 | 1991-01-29 | 1991-07-31 | $7700.00 | Window Closed / Lapsed |