Process for separating bituminous materials
US4279739A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jun 30, 1980 |
| Grant date | Jul 21, 1981 |
| Priority date | — |
| Expiry date | Jun 30, 2000 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC10G21/28
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A process for separating a solvent from a bituminous material by pressure reduction and steam stripping without carry-over of entrained bituminous material. The fluid-like phase of bituminous material and solvent is reduced in pressure and introduced into a steam stripper. The solvent vaporizes upon pressure reduction and a mist of fine bituminous material particles forms and becomes dispersed in the vaporized solvent. The vaporized solvent and associated mist is separated from the bituminous material in the stripper and is withdrawn from the steam stripper and introduced into a condenser. The solvent and steam from the stripper condense, a substantial portion of the mist of entrained particles solidifies and an emulsion of water and fluid-like bituminous material from the mist forms. The liquid stream is withdrawn from the condenser and introduced into a separator. The liquid stream separates in the separator into an upper fraction comprising solvent, a middle fraction comprising emulsion and a lower fraction comprising water and the solidified particles of bituminous material. The liquid solvent is removed by passage over a weir in the separator and recovered. The emulsion, water…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.