Cleaning and dewatering fine coal
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Oct 17, 2017
Issued Date -
N/A
app pub date -
Jan 31, 2011
filing date -
Feb 1, 2010
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
Fine coal is cleaned of its mineral matter impurities and dewatered by mixing the aqueous slurry containing both with a hydrophobic liquid, subjecting the mixture to a phase separation. The resulting hydrophobic liquid phase contains coal particles free of surface moisture and droplets of water stabilized by coal particles, while the aqueous phase contains the mineral matter. By separating the entrained water droplets from the coal particles mechanically, a clean coal product of substantially reduced mineral matter and moisture contents is obtained. The spent hydrophobic liquid is separated from the clean coal product and recycled. The process can also be used to separate one type of hydrophilic particles from another by selectively hydrophobizing one.
First Claim
Other Claims data not available
Family
International Classification(s)
- 2011 Application Filing Year
- B03B Class
- 66 Applications Filed
- 41 Patents Issued To-Date
- 62.13 % Issued To-Date
Cited Art Landscape
Patent Citation Ranking
- 6 Citation Count
- B03B Class
- 40 % this patent is cited more than
- 8 Age
Maintenance Fees
| Fee | Large entity fee | small entity fee | micro entity fee | due date |
|---|---|---|---|---|
| 7.5 Year Payment | $3600.00 | $1800.00 | $900.00 | Apr 17, 2025 |
| 11.5 Year Payment | $7400.00 | $3700.00 | $1850.00 | Apr 17, 2029 |
