For a company that announces the door closing... we missed this:
WO/2017/136885
Full PCT spec available
A process for recovering lithium from lithium-bearing materials, in particular lithium bearing silicates such as spodumene, is provided. The process involves the steps of mixing the lithium-bearing material with a source of fluoride, such as calcium fluoride or hydrogen fluoride, in the presence of sulphuric acid at 90 °C for ≥ 3 h to extract ≥ 80% Li. Lithium values may be recovered as >98% purity lithium carbonate by raising the pH of the pregnant liquor solution (PLS) to pH < 4 to precipitate Al and fluoride from solution, with a subsequent softening step to bulk remove excess calcium sulphate, followed by evaporation and precipitation of lithium carbonate.
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