Control of dust during coal transportation
US4169170A · kind A · utility
35Cited by
8References
5Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Feb 2, 1977 |
| Grant date | Sep 25, 1979 |
| Priority date | — |
| Expiry date | Feb 2, 1997 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC10L9/10
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Spraying of coal in an open top hopper car with an aqueous composition containing at least about 2.5% of a binder material consisting of solid material in an aqueous suspension of an asphalt emulsion or a black liquor lignin product and containing 0.1 to 2.0% of water soluble ethoxylated alkyl phenol or sulfo succinate wetting agent results in the formation of a crust layer which provides protection against loss of coal due to wind action during rapid movement of the car.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.