Extraction of metals from aqueous solutions with asphaltenes
US4802920A · kind A · utility
2Cited by
10References
47Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 18, 1985 |
| Grant date | Feb 7, 1989 |
| Priority date | — |
| Expiry date | Dec 18, 2005 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02P10/20
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A process for extracting metals from aqueous solutions containing such metals comprising contacting such an aqueous solution with an asphaltene to extract at least one metal from the aqueous solution to the asphaltene, and recovering the thus extracted at least one metal from the asphaltene. Also disclosed is a process for sulfonating a petroleum fraction containing asphaltenes, the thus sulfonated asphaltenes being advantageously employable in the process for extracting at least one metal from an aqueous solution containing such metal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.