Supported heteropolycyclic compounds in the separation and removal of late transition metals
US4995984A · kind A · utility
24Cited by
1References
27Claims
0Family size
Assignees
Inventor
Key dates
| Filing date | Sep 18, 1989 |
| Grant date | Feb 26, 1991 |
| Priority date | — |
| Expiry date | Sep 18, 2009 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC02F1/288
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
Compositions comprising carbon-based supports and containing heteropolycyclic compounds such as bipyridyl, phenanthroline or derivatives thereof are used in separation of dissolved late transition metals such as Fe, Co, Ni and Cu from solutions, in particular when such solutions contain high concentrations of other dissolved metals such as Zr, Hf, La, Al and Ba. Such compositions are also used to separate late transition metals such as Pt group metals from each other.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.