Polar solvent-asphaltene dispersant method for upgrading heavy oils
US7579303B2 · kind B2 · utility
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6Claims
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Key dates
| Filing date | Jul 1, 2005 |
| Grant date | Aug 25, 2009 |
| Priority date | — |
| Expiry date | Jul 29, 2026 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC10G21/003
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A method for reducing the viscosity and toluene equivalence of an oil containing asphaltenes comprises the steps of: a) mixing with the oil, a polar solvent, and an asphaltene dispersant additive wherein the weight ratio of oil:polar solvent is in the range of 10:0.1 to 10:5, the asphaltene dispersant additive is at a treat rate in the range of 0.025 to 5 weight percent based on the weight of the oil, and then, b) removing at least 90 wt % of the polar solvent from the mixture of oil, polar solvent and the asphaltene dispersant additive to provide upgraded oil with reduced viscosity and toluene equivalence.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.