Tracer technology for dust control
US5714387A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 28, 1996 |
| Grant date | Feb 3, 1998 |
| Priority date | — |
| Expiry date | Feb 28, 2016 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N21/643
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A method of determining the dosage of dust control agents applied to coal is disclosed. The method comprises the steps of: (1) treating the coal, with a small amount of a dust control agent containing a compatible fluorescent dye; (2) extracting the treated coal with a polar solvent for the freeze-release agent and determining the fluorescence of such extract; (3) extracting a similar treated coal sample to which a known amount of the dust control agent has been further added and determining the fluorescence of this extract; (4) setting up a proportionality between the fluorescence values of extracts (2) and (3) with the corresponding dosages of dust control agents and solving for the unknown dosage originally applied to the coal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.