Method and apparatus for separating selected particulate materials from a mixture of liquids and solids
US4540484A · kind A · utility
Inventor
Key dates
| Filing date | Nov 1, 1979 |
| Grant date | Sep 10, 1985 |
| Priority date | — |
| Expiry date | Nov 1, 1999 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB03D1/1493
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A chemical reagent is mixed with the mixture to form a resultant reaction mixture under substantially nonoxidizing or oxygen-free conditions. A continuous movement of the resultant reaction mixture is established through a flotation zone while maintaining substantially quiescent flow conditions during the continuous movement thereof. A first outlet is used to discharge a free or unimpeded flow of material collected at the upper surface of the liquid carrier medium within the flotation zone. A second outlet is used to discharge an impeded flow maintained at a lower flow rate than the free flow from said first discharging outlet. The chemical reagent is composed of a liquid hydrocarbon, a reducing material and an activator material. A trough shaped vessel has a discharge end with an upper outlet means and a lower outlet means. The vessel has a structural configuration effective to provide the continuous, substantially quiescent movement of the mixture through the vessel. Mineral value fines subject to having an oxygen-controlled surface condition constitute the selected particulate material being extracted from the mixture of liquids and solids. These selected materials include bitum…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.