Process for the isolation of chemicals from processed coals
US4127475A · kind A · utility
16Cited by
3References
28Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 14, 1977 |
| Grant date | Nov 28, 1978 |
| Priority date | — |
| Expiry date | Feb 14, 1997 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC10G1/002
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
Processed coal such as solvent refined coal are subjected to multistage liquid chromatographic fractionation. There is employed a succession of eluants of progressively varying properties, this succession having the effect of removing from the substrate a corresponding succession of sharply defined, chemically differentiated product groups each of value as an industrial raw material. An installation for practising the invention on a continuous basis is described.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.