Precipitation of asphaltene
US4846957A · kind A · utility
7Cited by
8References
12Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 13, 1987 |
| Grant date | Jul 11, 1989 |
| Priority date | — |
| Expiry date | Nov 13, 2007 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC10G21/003
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
Asphaltenes are separated from hydrocarbon oil by bringing the oil into contact with formic acid or a water-soluble organic acid consisting of carbon, hydrogen and oxygen and having at least two functional groups.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.