Process of treating bituminous sands conveyor belt with release agent
US4172811A · kind A · utility
Assignees
Inventors
Key dates
| Filing date | Nov 1, 1977 |
| Grant date | Oct 30, 1979 |
| Priority date | — |
| Expiry date | Nov 1, 1997 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC10G1/047
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A process for treating a conveyor belt carrying bituminous sands with a release agent comprises: applying to the sands-bearing surface of the belt, prior to deposition of the bituminous sands, a water-based emulsion having as the disperse phase a silicone fluid having short hydroxyl-terminated polymer chains and a viscosity on the order of 100 centistokes; unloading the sands from the belt; and recovering the bitumen from the sands using a hot water extraction step. The emulsion acts as a release agent which effects clean separation of the sands from the belt surface during unloading and does not deleteriously affect the primary bitumen recovery in the extraction step.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.