Froth promotor for flotation of coal
US4308133A · kind A · utility
36Cited by
11References
8Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jun 20, 1980 |
| Grant date | Dec 29, 1981 |
| Priority date | — |
| Expiry date | Jun 20, 2000 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB03D2203/08
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
Aromatic polycyclic, hydrocarbon compounds bearing at least one nuclear sulfonic acid or sulfonate moiety are useful as froth promoters to improve the recovery of clean coal in the froth flotation of finely-divided coal. Disulfonated diphenyl ether compounds bearing at least one nuclear alkyl group of from 10 to 22 carbon atoms are particularly efficacious.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.