Distillation-induced extraction process
US4450067A · kind A · utility
54Cited by
4References
7Claims
0Family size
Assignee
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Key dates
| Filing date | Apr 30, 1981 |
| Grant date | May 22, 1984 |
| Priority date | — |
| Expiry date | Apr 30, 2001 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC10G21/02
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A process for multi-solvent extraction is provided wherein polarity gradients induced by distillation are utilized for the extraction of petroleum residua and other heavy oils whereby a high quality maltenic fraction and a lower quality asphaltenic fraction are obtained.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.