Method of removing transition metals
US6376690B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 30, 1999 |
| Grant date | Apr 23, 2002 |
| Priority date | — |
| Expiry date | Aug 30, 2019 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G61/08
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
The present invention generally relates to the discovery that the solubility of metal complexes may be readily manipulated by the addition of one or more solubility-enhancing compounds. This manipulation of the solubilities allows for the preparation of suitable samples for precise quantitative analysis and for the facile purification of the desired products from the reaction mixture containing one or more metal complexes. In one embodiment of the invention, the relative solubilities between two solutions are manipulated so as cause the metal complex found in a first solution to transfer to a second solution that is generally immiscible with the first solution. The metal complex is thus separated from the reaction mixture which comprises the first solution by the removal of the second solution. In another embodiment, the solubility-enhancing compounds of the present invention is used to prepare samples containing metal complexes for precise quantitative analysis such as inductively coupled plasma mass spectroscopy.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.