Deashing of coal by the oil agglomeration process
US4396396A · kind A · utility
12Cited by
6References
4Claims
0Family size
Inventor
Key dates
| Filing date | Nov 5, 1981 |
| Grant date | Aug 2, 1983 |
| Priority date | — |
| Expiry date | Nov 5, 2001 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC10G1/00
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A method of deashing coal wherein the coal is wetted with hydrocarbon liquid to form agglomerates and the hydrophilic agglomerates are then separated from a water and ash phase to yield deashed coal agglomerates. The hydrocarbon liquid is then recovered from the coal agglomerates by a vacuum stripping in the absence of oxidizing gases with or without use of super heated steam. Where super heated steam is used the removed hydrocarbon liquid is subsequently separated from the steam by cooling.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.