Scavenger supports and the use thereof in a process for the extraction of metals
US9234256B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 13, 2005 |
| Grant date | Jan 12, 2016 |
| Priority date | — |
| Expiry date | Apr 27, 2029 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02W30/50
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
There is provided a process for removing metal from solution wherein a solution comprising a metal is contacted with a scavenger support, whereby the scavenger support binds to at least some of the metal in solution thereby decreasing the amount of metal in solution, characterized in that the scavenger support comprises a functionalized support comprising pendant groups selected from 1,3-ketoesters or 1,3-ketoamides or mixtures thereof attached to a support wherein a number of the pendant groups are reacted with an amine. Scavenger supports comprising a functionalized support comprising pendant 1,3-ketoester or 1,3-ketoamide groups of formula 1: wherein R1 is an optionally substituted hydrocarbyl, perhalogenated hydrocarbyl or heterocyclyl group; X is O or NR2, wherein the free valence of O or NR2 is bonded to a support optionally via a linker; and R2 is hydrogen, an optionally substituted hydrocarbyl, or heterocyclyl group, wherein a number of the pendant groups are reacted with an amine are also provided. Preferred scavenger supports include scavenger supports comprising pendant 3-iminoesters, 3-iminoamides, 2,3-enaminoesters or 2,3-enaminoamides pendant groups of Formula (3) or …
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.