Solvent deasphalting in solid phase
US4572781A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 29, 1984 |
| Grant date | Feb 25, 1986 |
| Priority date | — |
| Expiry date | Feb 29, 2004 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC10G21/003
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A process for separating substantially dry asphaltenes of high softening point from heavy hydrocarbon material comprising: PA1 (a) admixing heavy hydrocarbon material containing asphaltenes with a solution of deasphalted oil and an aliphatic hydrocarbon precipitant in a first mixing zone to form a mixture and precipitate asphaltenes; PA1 (b) in a first separation zone the mixture from step (a) into (i) a first solution of deasphalted oil and precipitant and (ii) a slurry of solid asphaltene particles in a solution of precipitant and desasphalted oil; PA0 (c) separating the first solution of step (b) to obtain said precipitant and the deasphalted oil almost free of asphaltenes; PA0 (d) introducing the slurry of asphaltenes of step (b) into a second mixing zone and washing the slurry with a volume of fresh precipitant to remove deasphalted oil; PA0 (e) introducing the mixture from the second mixing zone into a second separation zone that comprises a centrifugal decanter to separate a liquid phase from a highly concentrated slurry of solid asphaltenes; PA0 (f) recycling the liquid phase from the second separation zone to said first mixing zone; PA0 (g) introducing the concentrated slu…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.