Polymers grafted with organic phosphorous compounds for extracting uranium from solutions
US10441940B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Aug 20, 2013 |
| Grant date | Oct 15, 2019 |
| Priority date | — |
| Expiry date | Nov 14, 2034 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC02F2303/16
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
Complexing or chelating agents that offer strong, selective bonding with uranium as well as a broad pH range of effectiveness, specifically including the pH range around 8.2, together with the acrylic double bonds required for radiation-induced grafting on polymers to remove uranium from a solution such as seawater. The novel adsorbing species are phosphorus-containing molecules, in particular organic phosphates, phosphonates and phosphoric acids. Organic phosphorus compounds, for example, organic phosphates, phosphonates, and phosphoric acids, are attached to polymer fibers to form fibers, fiber fabrics or membranes that are effective, or show activity, in uranium adsorption.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.