Treatment of viscous crude oils
US4781819A · kind A · utility
26Cited by
20References
13Claims
0Family size
Assignees
Inventors
Key dates
| Filing date | Jul 21, 1986 |
| Grant date | Nov 1, 1988 |
| Priority date | — |
| Expiry date | Jul 21, 2006 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC10G21/28
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
Asphaltenes and/or wax and/or water are removed from crude oil by contacting the crude oil with an organic solvent to dissolve the crude oil and precipitate asphaltenes and/or wax and separate the oil and water. Solvent is then separated from the deasphalted and/or dewaxed and/or dehydrated crude oil. Removing asphaltenes, wax and/or water reduces the viscosity of the crude oil and it can then be transported, e.g. by pumping through a pipeline, with less expenditure of energy.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.