US4171276A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dust suppression method and composition
Assignee: Veolia WTS USA Inc
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Filing: 1978-10-16
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Granted: 1979-10-16
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Expires: 1998-10-16
Abstract
Abstract The dissemination of fugitive dust particles into the atmosphere is reduced by treating the particles with an aqueous solution of alkylphenoxy polyethoxy ethanol and copolymer of ethylene oxide and propylene oxide.
Inventors
- 👤 Gary A. Brehm
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 02:28
CPC Classifications
C; C21; C21C; C21C5/00; C21C5/28; C21C5/38; C09; C09K; C09K3/00; C09K3/22; C21B; C21B7/00; C21B7/22
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
150 words
A method for enhancing the reduction of the dissemination of fugitive dust particles into the atmosphere comprising wetting the dust particles with an effective amount for the purpose of an aqueous solution of: (i) alkylphenoxy polyethoxy ethanol wherein the alkyl group has from 7 to 10 carbon atoms, and (ii) copolymer of ethylene oxide and propylene oxide, wherein the weight ratio of the ethanol compound to the copolymer is from about 5/95 to 95/5, wherein the copolymer has a molecular weight of from about 1000 to 16,000 and an ethylene oxide content of from about 10% to 80%, wherein the ethanol compound has from about 5 to 40 moles of ethylene oxide, and wherein the total concentration of the ethanol compound and the copolymer in the aqueous solution is from about 0.005% to 6%, whereby the combination of components (i) and (ii) unexpectedly enhances the wetting of the dust particles.
Claim 2
Independent Claim
150 words
A method for enhancing the reduction of the dissemination of fugitive dust particles into the atmosphere comprising wetting the dust particles with an effective amount for the purpose of an aqueous solution of: (i) alkylphenoxy polyethoxy ethanol wherein the alkyl group has from 7 to 10 carbon atoms, and (ii) copolymer of ethylene oxide and propylene oxide, wherein the weight ratio of the ethanol compound to the copolymer is from about 5/95 to 95/5, wherein the copolymer has a molecular weight of from about 1000 to 16,000 and an ethylene oxide content of from about 10% to 80%, wherein the ethanol compound has from about 5 to 40 moles of ethylene oxide, and wherein the total concentration of the ethanol compound and the copolymer in the aqueous solution is from about 0.005% to 6%, whereby the combination of components (i) and (ii) unexpectedly enhances the wetting of the dust particles.
Claim 3
Dependent Claim
12 words
The method of claim 1, wherein the treatment is applied by spraying.
Claim 4
Dependent Claim
11 words
The method claim 2, wherein the treatment also comprises a stabilizer.
Claim 5
Dependent Claim
11 words
The method of claim 3, wherein the stabilizer is ethylene glycol.
Claim 6
Dependent Claim
17 words
The method of claim 2, wherein the fugitive dust particles are discharged from a basic oxygen furnace.
Claim 7
Dependent Claim
17 words
The method of claim 3, wherein the fugitive dust particles are discharged from a basic oxygen furnace.
Claim 8
Dependent Claim
13 words
The method of claim 2. wherein the fugitive dust particles are sinter dust.
Claim 9
Dependent Claim
14 words
The method of claim 4, wherein the fugitive dust particles are sinter dust particles.
Claim 10
Dependent Claim
18 words
The method of claim 1, wherein the copolymer has a molecular weight of from about 1950 to 13,300.
Claim 11
Dependent Claim
17 words
The method claim 2, wherein the copolymer has a molecular weight of from about 1950 to 13,300.
Claim 12
Dependent Claim
18 words
The method of claim 5, wherein the copolymer has a molecular weight of from about 1950 to 13,300.
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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) | 1982-10-15 | 1983-04-16 | 1983-10-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-10-15 | 1987-04-16 | 1987-10-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-10-15 | 1991-04-16 | 1991-10-16 | $7700.00 | Window Closed / Lapsed |