Coal filtration process and dewatering aids therefor
US4892663A · kind A · utility
3Cited by
10References
3Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Dec 2, 1988 |
| Grant date | Jan 9, 1990 |
| Priority date | — |
| Expiry date | Dec 2, 2008 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01D37/03
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
Disclosed is a method for dewatering an aqueous slurry of solid coal particulates wherein a dewatering aid is added to the slurry followed by filtration thereof, preferably with vacuum augmentation. Selected quaternary ammonium dewatering aids of specific structure are disclosed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.