Modified alcohol frothers for froth flotation of coal
US4606818A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jan 25, 1985 |
| Grant date | Aug 19, 1986 |
| Priority date | — |
| Expiry date | Jan 25, 2005 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB03D2203/08
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
Disclosed is an improved froth flotation process wherein solid coal particles are selectively separated under coal froth flotation conditions as a froth phase from remaining solid feed particles as an aqueous phase in the presence of a coal particle collector (e.g. a fuel oil), optionally a promoter, and an alcohol frother. The improvement in the present invention is characterized by the alcohol frother comprising the reaction product of a C.sub.4 -C.sub.10 diol and a compound selected from the group consisting of an alkylene oxide and an acrylonitrile. The resulting frothing agent has at least one hydroxyl group and provides greater coal recovery than use of the diol as the frothing agent.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.