Abstract
A system for extracting ions from an aqueous solution without utilizing ion exchange. A semi-permeable membrane with 0.1 to 1000 nm diameter pores separates an aqueous salt solution from a chelating gel. The gel has un-crosslinked polymer (e.g. 1-10% by weight) and the balance water. The semi-permeable membrane lets ions diffuse into the chelating gel where the ions become trapped. The gel has a molecular weight that prevents its diffusion through the semi-permeable membrane.
| Original language | English |
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| Patent number | WO2019152774 |
| Priority date | 01/02/2018 |
| Filing date | 01/02/2019 |
| Publication status | Published - 8-Aug-2019 |