A method for recovery of lithium
AssigneeNorthvolt Revolt AB
InventorsAndrea MARÍA BURGOS PARRA, Robert JENSEN, Alejandro Gracia TABUENCA, Mahmood ALEMRAJABI
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Abstract
The disclosure provides a method for recovery of lithium such as recovery from an energy storing device or a component thereof. The method comprises the steps of: i) providing a lithium-containing aqueous residual solution; ii) adding H3PO4 and/or Na3PO4 to the aqueous residual solution in the presence of a pH adjuster providing a pH of from 9 to 10 at a temperature of from about 20° C. to about 65° C. thereby precipitating Li3PO4 and forming a filtrate, said H3PO4 and/or Na3PO4 being added in a molar ratio with respect to the lithium present in the aqueous solution from 1:1 to 1.5:1; and iii) separating the Li3PO4 from the filtrate.
Claims17
A method for recovery of lithium from an aqueous residual solution comprising one or more lithium salts, said method comprising the steps of:
- i) providing a lithium-containing aqueous residual solution;
- ii) adding H3PO4 and/or Na3PO4 to the aqueous residual solution in the presence of a pH adjuster providing a pH of from 9 to 10 at a temperature of from about 20° C. to about 65° C. thereby precipitating Li3PO4 and forming a filtrate, said H3PO4 and/or Na3PO4 being added in a molar ratio with respect to the lithium present in the aqueous solution from 1:1 to 1.5:1;
- and
- iii) separating the Li3PO4 from the filtrate.
Dependencies are inferred from the claim text.