US4780233A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dust suppression methods and compositions
Assignee: Veolia WTS USA Inc
•
Filing: 1987-09-04
•
Granted: 1988-10-25
•
Expires: 2007-09-04
Abstract
Abstract Minor amounts of water insoluble elastomeric polymers are combined with oil. The combination is sprayed or applied in a foam carrier to dust particles to inhibit dissemination thereof which would otherwise occur by windage or transit motion and the like.
Inventors
- 👤 Donald C. Roe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 22:56
CPC Classifications
C; C09; C09K; C09K3/00; C09K3/22
Claims Analysis
Total Claims: 23
Claim 1
Independent Claim
65 words
In a method for reducing the dissemination of fugitive dust particles into the atmosphere wherein oil is applied to said dust particles, the improvement comprising also applying from a trace to about 0.06 weight %, based upon the weight of said oil, of a water insoluble elastomeric polymer to said dust particles, said polymer being effective to increase the dust suppressing efficacy of said oil.
Claim 2
Dependent Claim
65 words
In a method for reducing the dissemination of fugitive dust particles into the atmosphere wherein oil is applied to said dust particles, the improvement comprising also applying from a trace to about 0.06 weight %, based upon the weight of said oil, of a water insoluble elastomeric polymer to said dust particles, said polymer being effective to increase the dust suppressing efficacy of said oil.
Claim 3
Dependent Claim
29 words
Method as recited in claim 1 wherein between about 0.01 to about 5 gallons of said oil and said elastomer, in combination, per ton of said dust, is applied.
Claim 4
Dependent Claim
17 words
Method as recited in claim 2 wherein said combination of oil and elastomer is applied by spraying.
Claim 5
Dependent Claim
21 words
Method as recited in claim 2 wherein said combination of oil and elastomer is applied in the form of a foam.
Claim 6
Dependent Claim
26 words
Method as recited in claim 1 wherein said water insoluble elastomeric polymer comprises polyisobutylene having a molecular weight of from about 500,000 to about 2 million.
Claim 7
Dependent Claim
17 words
Method as recited in claim 5 wherein said polyisobutylene has a molecular weight of about 1 million.
Claim 8
Dependent Claim
16 words
Method as recited in claim 1 wherein said dust comprises green or calcined petroleum coke dust.
Claim 9
Dependent Claim
12 words
Method as recited in claim 1 wherein said dust comprises coal dust.
Claim 10
Dependent Claim
16 words
Method as recited in claim 1 wherein said dust is discharged from a basic oxygen furnace.
Claim 11
Dependent Claim
14 words
Method as recited in claim 1 wherein said dust is steel mill sinter dust.
Claim 12
Dependent Claim
13 words
Method as recited in claim 1 wherein said dust is metallurgical coke dust.
Claim 13
Dependent Claim
17 words
Method as recited in claim 1 wherein said dust is fertilizer raw material, process and product dust.
Claim 14
Dependent Claim
16 words
Method as recited in claim 1 wherein said dust is cement raw material or clinker dust.
Claim 15
Dependent Claim
26 words
Method as recited in claim 1 wherein said oil is a light viscosity process oil having an SUS viscosity at 38° C. of from about 60-600.
Claim 16
Dependent Claim
23 words
Method as recited in claim 1 wherein said oil has an SUS viscosity at 38° C. of from about 200 to around 400.
Claim 17
Dependent Claim
29 words
Composition comprising, in combination, oil, anionic and/or nonionic surfactant, and from a trace to about 0.06 weight percent, based upon the weight of said oil, water insoluble elastomeric polymer.
Claim 18
Dependent Claim
29 words
Composition comprising, in combination, oil, anionic and/or nonionic surfactant, and from a trace to about 0.06 weight percent, based upon the weight of said oil, water insoluble elastomeric polymer.
Claim 19
Dependent Claim
24 words
Composition as recited in claim 16, comprising 1-25 wt % anionic and/or nonionic surfactant, about 0.01-0.06 wt % water insoluble elastomeric polymer, remainder oil.
Claim 20
Dependent Claim
14 words
Composition as recited in claim 17 wherein said water insoluble elastomeric polymer is polyisobutylene.
Claim 21
Dependent Claim
28 words
Composition as recited in claim 18 comprising about 5.0 wt % isopropylamine dodecylbenzene sulfonate, about 4.0 wt % oleic acid, about 0.06 wt % said polyisobutylene, remainder oil.
Claim 22
Dependent Claim
17 words
Foamed mixture comprising a compositions as recited in claim 16, water and sufficient gas to form foam.
Claim 23
Dependent Claim
26 words
Foamed mixture of claim 20 wherein said composition includes about 0.06 weight percent polyisobutylene, about 9 weight percent anionic and/or nonionic surfactant and the remainder 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) | 1991-10-25 | 1992-04-25 | 1992-10-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-10-25 | 1996-04-25 | 1996-10-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-10-25 | 2000-04-25 | 2000-10-25 | $7700.00 | Window Closed / Lapsed |