Method of beneficiating coal
US4560390A · kind A · utility
6Cited by
11References
10Claims
0Family size
Inventor
Key dates
| Filing date | Sep 22, 1983 |
| Grant date | Dec 24, 1985 |
| Priority date | — |
| Expiry date | Sep 22, 2003 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC10L9/02
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A process for reducing the sulfur and ash content of coal is provided. The process involves cleaning the coal of debris and pulverizing it. The pulverized coal is contacted with a reagent selected from the group consisting of aqueous solutions of active nitrogen containing compounds, aqueous solutions of organic compounds containing at least one hydroxyl group, surfactants containing active ammonium groups and combinations thereof. The coal is washed with water and dried.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.